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  <xsd:element id="mlm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_CashPaidForAmountIncludedInMeasurementOfLeaseLiabilities" name="CashPaidForAmountIncludedInMeasurementOfLeaseLiabilities" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_CashUsedForOperatingAndInvestingActivitiesForDiscontinuedOperations" name="CashUsedForOperatingAndInvestingActivitiesForDiscontinuedOperations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_CollectiveBargainingAgreementExpirationMonthYear" name="CollectiveBargainingAgreementExpirationMonthYear" type="xbrli:gYearMonthItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_CommonStockPrice" name="CommonStockPrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="mlm_ConsolidatedDebtReductionForUnrestrictedCashAndCashEquivalentsForDebtCovenantCalculation" name="ConsolidatedDebtReductionForUnrestrictedCashAndCashEquivalentsForDebtCovenantCalculation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_CumulativeSharesIssuedUnderShareholderValueAchievementPlan" name="CumulativeSharesIssuedUnderShareholderValueAchievementPlan" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_CustomerPaymentTermsBasedOnContractualBilling" name="CustomerPaymentTermsBasedOnContractualBilling" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_DebtInstrumentMaturityDateYear" name="DebtInstrumentMaturityDateYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_DebtInstrumentPayableUponMaturity" name="DebtInstrumentPayableUponMaturity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_DecreaseInUnrecognizedTaxBenefitsExcludingInterestAndCorrelativeEffects" name="DecreaseInUnrecognizedTaxBenefitsExcludingInterestAndCorrelativeEffects" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossibleExcludingInterestAndCorrelativeEffects" name="DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossibleExcludingInterestAndCorrelativeEffects" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_DeferredTaxAssetsLeaseLiability" name="DeferredTaxAssetsLeaseLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_DeferredTaxAssetsValuationAndOtherReserves" name="DeferredTaxAssetsValuationAndOtherReserves" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_DeferredTaxLiabilitiesEmployeeBenefits" name="DeferredTaxLiabilitiesEmployeeBenefits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_DeferredTaxLiabilitiesRightOfUseAssets" name="DeferredTaxLiabilitiesRightOfUseAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_DepreciationAndDepletionAndAmortizationExcludingPortionAttributableToMachineryAndEquipmentUnderCapitalLeases" name="DepreciationAndDepletionAndAmortizationExcludingPortionAttributableToMachineryAndEquipmentUnderCapitalLeases" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_DisposalGroupIncludingDiscontinuedOperationAssetRetirementObligationsNoncurrent" name="DisposalGroupIncludingDiscontinuedOperationAssetRetirementObligationsNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_DisposalGroupIncludingDiscontinuedOperationLeaseObligationsCurrent" name="DisposalGroupIncludingDiscontinuedOperationLeaseObligationsCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_DisposalGroupIncludingDiscontinuedOperationLeaseObligationsNoncurrent" name="DisposalGroupIncludingDiscontinuedOperationLeaseObligationsNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_DisposalGroupIncludingDiscontinuedOperationLeaseRightOfUseAssets" name="DisposalGroupIncludingDiscontinuedOperationLeaseRightOfUseAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_DisposalGroupIncludingDiscontinuedOperationValuationAllowanceForLossOnSale" name="DisposalGroupIncludingDiscontinuedOperationValuationAllowanceForLossOnSale" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_DomesticAndForeignOperatingLossCarryForwardExpirationDate" name="DomesticAndForeignOperatingLossCarryForwardExpirationDate" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_EffectiveIncomeTaxRateReconciliationChangeInTaxStatusOfSubsidiary" name="EffectiveIncomeTaxRateReconciliationChangeInTaxStatusOfSubsidiary" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities1" name="ExcessTaxBenefitFromShareBasedCompensationOperatingActivities1" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightment" name="FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightmentDueAfterYearFive" name="FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightmentDueAfterYearFive" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightmentDueNextTwelveMonths" name="FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightmentDueNextTwelveMonths" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightmentDueYearFive" name="FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightmentDueYearFive" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightmentDueYearFour" name="FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightmentDueYearFour" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightmentDueYearThree" name="FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightmentDueYearThree" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightmentDueYearTwo" name="FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightmentDueYearTwo" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_FutureShareBasedCompensationExpense" name="FutureShareBasedCompensationExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_FutureShareBasedCompensationExpenseYearFive" name="FutureShareBasedCompensationExpenseYearFive" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_FutureShareBasedCompensationExpenseYearFour" name="FutureShareBasedCompensationExpenseYearFour" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_FutureShareBasedCompensationExpenseYearOne" name="FutureShareBasedCompensationExpenseYearOne" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_FutureShareBasedCompensationExpenseYearThree" name="FutureShareBasedCompensationExpenseYearThree" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_FutureShareBasedCompensationExpenseYearTwo" name="FutureShareBasedCompensationExpenseYearTwo" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_GainLossOnDispositionOfAssetsAndExtinguishmentOfDebt" name="GainLossOnDispositionOfAssetsAndExtinguishmentOfDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_GoodwillReclassifiedFromAllocatedToAssetsHeldForSale" name="GoodwillReclassifiedFromAllocatedToAssetsHeldForSale" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_GroupOfBondsAmount" name="GroupOfBondsAmount" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_GuaranteeObligationsOutstanding" name="GuaranteeObligationsOutstanding" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_IncrementalBorrowingRate" name="IncrementalBorrowingRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_LesseeOptionToExtend" name="LesseeOptionToExtend" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_LesseeOptionToTerminate" name="LesseeOptionToTerminate" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_LesseeRemainingLeaseTerm" name="LesseeRemainingLeaseTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_MaximumConsolidatedDebtReductionForUnrestrictedCashAndTemporaryInvestmentsForDebtCovenantCalculation" name="MaximumConsolidatedDebtReductionForUnrestrictedCashAndTemporaryInvestmentsForDebtCovenantCalculation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_MinimumLikelihoodForRecognitionOfTaxBenefitRelatedToUncertainTaxPosition" name="MinimumLikelihoodForRecognitionOfTaxBenefitRelatedToUncertainTaxPosition" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_NumberOfCementPlants" name="NumberOfCementPlants" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_NumberOfDaysRestrictedFromUtilizingCash" name="NumberOfDaysRestrictedFromUtilizingCash" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_NumberOfQuarriesAndYards" name="NumberOfQuarriesAndYards" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_NumberOfRailcarPurchase" name="NumberOfRailcarPurchase" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="mlm_NumberOfRailCarsCommitment" name="NumberOfRailCarsCommitment" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="mlm_OperatingLossCarryForwardsExpirationYear" name="OperatingLossCarryForwardsExpirationYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_OtherPostretirementDefinedBenefitPlanLiabilitiesCurrent" name="OtherPostretirementDefinedBenefitPlanLiabilitiesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_PercentageOfDiscountRateToMarketValueOnIncentiveCompensation" name="PercentageOfDiscountRateToMarketValueOnIncentiveCompensation" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_PercentageOfEmployeesRepresentedInLaborUnion" name="PercentageOfEmployeesRepresentedInLaborUnion" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_PercentageOfIncentiveCompensationToAcquireSharesMaximum" name="PercentageOfIncentiveCompensationToAcquireSharesMaximum" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_PerformanceObligationPeriod" name="PerformanceObligationPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_ProductAndFreightRevenuesCustomerPaymentTerms" name="ProductAndFreightRevenuesCustomerPaymentTerms" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_PropertyPlantAndEquipmentAdditionsThroughAcquisitions" name="PropertyPlantAndEquipmentAdditionsThroughAcquisitions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetDepreciationAndAmortization" name="PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetDepreciationAndAmortization" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_PurchaseOfRestrictedInvestmentsToDischargeLongTermDebt" name="PurchaseOfRestrictedInvestmentsToDischargeLongTermDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_RatioOfConsolidatedNetDebtToEarningsBeforeInterestTaxesDepreciationDepletionAndAmortization" name="RatioOfConsolidatedNetDebtToEarningsBeforeInterestTaxesDepreciationDepletionAndAmortization" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="mlm_RemeasurementOfFinanceLeaseRightOfUseAssets" name="RemeasurementOfFinanceLeaseRightOfUseAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_RemeasurementOfOperatingLeaseRightOfUseAssets" name="RemeasurementOfOperatingLeaseRightOfUseAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_RetirementPlansAndPostretirementBenefitsAmortizedAmountRepresentingPercentageOfGreaterOfProjectedBenefitObligationOrPensionPlanAssets" name="RetirementPlansAndPostretirementBenefitsAmortizedAmountRepresentingPercentageOfGreaterOfProjectedBenefitObligationOrPensionPlanAssets" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_RoyaltyCommitmentsFutureMinimumPaymentsDue" name="RoyaltyCommitmentsFutureMinimumPaymentsDue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_RoyaltyCommitmentsFutureMinimumPaymentsDueAfterYearFive" name="RoyaltyCommitmentsFutureMinimumPaymentsDueAfterYearFive" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_RoyaltyCommitmentsFutureMinimumPaymentsDueNextTwelveMonths" name="RoyaltyCommitmentsFutureMinimumPaymentsDueNextTwelveMonths" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_RoyaltyCommitmentsFutureMinimumPaymentsDueYearFive" name="RoyaltyCommitmentsFutureMinimumPaymentsDueYearFive" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_RoyaltyCommitmentsFutureMinimumPaymentsDueYearFour" name="RoyaltyCommitmentsFutureMinimumPaymentsDueYearFour" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_RoyaltyCommitmentsFutureMinimumPaymentsDueYearThree" name="RoyaltyCommitmentsFutureMinimumPaymentsDueYearThree" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_RoyaltyCommitmentsFutureMinimumPaymentsDueYearTwo" name="RoyaltyCommitmentsFutureMinimumPaymentsDueYearTwo" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentForPerformance" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentForPerformance" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentForPerformanceWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentForPerformanceWeightedAverageGrantDateFairValue" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAvailableForGrant" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAvailableForGrant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_SuretyBonds" name="SuretyBonds" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_TaxCreditCarryForwardExpirationYear" name="TaxCreditCarryForwardExpirationYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_ThirdPartyRailroadTrackMaintenanceExpenses" name="ThirdPartyRailroadTrackMaintenanceExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="mlm_Top5SuretyBondsPercentage" name="Top5SuretyBondsPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="mlm_UnrecognizedTaxBenefitsExcludingInterestAndCorrelativeEffects" name="UnrecognizedTaxBenefitsExcludingInterestAndCorrelativeEffects" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpenseAndCorrelativeEffects" name="UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpenseAndCorrelativeEffects" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_UnrecognizedTaxBenefitsReversedIntoIncomeUponTheStatuteOfLimitationsExpiration" name="UnrecognizedTaxBenefitsReversedIntoIncomeUponTheStatuteOfLimitationsExpiration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="mlm_AcquiredFiniteAndIndefiniteLivedIntangibleAssetsLineItems" name="AcquiredFiniteAndIndefiniteLivedIntangibleAssetsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_BusinessCombinationsLineItems" name="BusinessCombinationsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_CommitmentsAndContingenciesLineItems" name="CommitmentsAndContingenciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_ComponentOfOtherOperatingIncomeAndExpenseLineItems" name="ComponentOfOtherOperatingIncomeAndExpenseLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_IncomeTaxesLineItems" name="IncomeTaxesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_RevenueRecognitionLineItems" name="RevenueRecognitionLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_SignificantAccountingPoliciesLineItems" name="SignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_AggregatesMember" name="AggregatesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_AsphaltAndPavingMember" name="AsphaltAndPavingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_AustinTexasAndRiversideCaliforniaMember" name="AustinTexasAndRiversideCaliforniaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_BahamasAndCanadaMember" name="BahamasAndCanadaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_BuildingMaterialsBusinessEastGroupMember" name="BuildingMaterialsBusinessEastGroupMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_BuildingMaterialsBusinessMember" name="BuildingMaterialsBusinessMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_BuildingMaterialsBusinessWestGroupMember" name="BuildingMaterialsBusinessWestGroupMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_CaliforniaAndColoradoMember" name="CaliforniaAndColoradoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_CementMember" name="CementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_ColoradoAndCentralTexasMember" name="ColoradoAndCentralTexasMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_ConduitLendersMember" name="ConduitLendersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_CorporateHeadquartersMember" name="CorporateHeadquartersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_DebtInstrumentRedemptionPeriodSixMember" name="DebtInstrumentRedemptionPeriodSixMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_DefinedBenefitPlanPrivateInfrastructureMember" name="DefinedBenefitPlanPrivateInfrastructureMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_DirectorsAwardsMember" name="DirectorsAwardsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_DomesticMember" name="DomesticMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_EastGroupMember" name="EastGroupMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_EnergyAndServiceContractsMember" name="EnergyAndServiceContractsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_ExcludingAcquisitionBridgeDebtMember" name="ExcludingAcquisitionBridgeDebtMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_ExpendablePartsInventoryMember" name="ExpendablePartsInventoryMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_FinanceLeaseRightOfUseAssetsMember" name="FinanceLeaseRightOfUseAssetsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_FloatingRateSeniorNotesDueTwentyTwentyMember" name="FloatingRateSeniorNotesDueTwentyTwentyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_ForeignMember" name="ForeignMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_FourPointTwoFivePercentSeniorNotesDueTwentyTwentyFourMember" name="FourPointTwoFivePercentSeniorNotesDueTwentyTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_FourPointTwoFiveZeroPercentSeniorNotesDueTwentyFourtySevenMember" name="FourPointTwoFiveZeroPercentSeniorNotesDueTwentyFourtySevenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_FourPointTwoFiveZeroPercentSeniorNotesDueTwentyTwentyFourMember" name="FourPointTwoFiveZeroPercentSeniorNotesDueTwentyTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_IncentiveStockMember" name="IncentiveStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_IncludingAcquisitionBridgeDebtMember" name="IncludingAcquisitionBridgeDebtMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_InterestOnlyLoanReceivableMember" name="InterestOnlyLoanReceivableMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_InventoryFinishedGoodsMember" name="InventoryFinishedGoodsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_LegacyTXIPlanMember" name="LegacyTXIPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_LehighHansonIncorporationWestRegionMember" name="LehighHansonIncorporationWestRegionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_LehighWestRegionSouthernCrushedConcreteAndTillerCorporationMember" name="LehighWestRegionSouthernCrushedConcreteAndTillerCorporationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_MagnesiaSpecialtiesMember" name="MagnesiaSpecialtiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_MineralReservesAndInterestsMember" name="MineralReservesAndInterestsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_OperatingPermitsMember" name="OperatingPermitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_OtherNotesMember" name="OtherNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_PercentageOfAggregatesBusinessNetSalesInTopFiveSalesStatesMember" name="PercentageOfAggregatesBusinessNetSalesInTopFiveSalesStatesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_PostretirementHealthCarePlansMember" name="PostretirementHealthCarePlansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_ProductsAndServicesMember" name="ProductsAndServicesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_ReadyMixedConcreteMember" name="ReadyMixedConcreteMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_RestrictedStockPerformanceBasedMember" name="RestrictedStockPerformanceBasedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_RestrictedStockServiceBasedMember" name="RestrictedStockServiceBasedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_RevolvingLineOfCreditExpiresInAugustTwoThousandFifteenMember" name="RevolvingLineOfCreditExpiresInAugustTwoThousandFifteenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_SevenPercentDebenturesDueTwentyTwentyFiveMember" name="SevenPercentDebenturesDueTwentyTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_ShareholderValueAchievementPlan1996Member" name="ShareholderValueAchievementPlan1996Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_SixPointTwoFivePercentageOfSeniorNotesDueTwoThousandThirtySevenMember" name="SixPointTwoFivePercentageOfSeniorNotesDueTwoThousandThirtySevenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_SixPointTwoFivePercentSeniorNotesDueTwentyThirtySevenMember" name="SixPointTwoFivePercentSeniorNotesDueTwentyThirtySevenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_SouthernCrushedConcreteMember" name="SouthernCrushedConcreteMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_StockOptionsOneMember" name="StockOptionsOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_StockOptionsTwoMember" name="StockOptionsTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_SuppliesInventoryMember" name="SuppliesInventoryMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_SuretyBondsMember" name="SuretyBondsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_ThreePointFiveZeroZeroPercentSeniorNotesDueTwentyTwentySevenMember" name="ThreePointFiveZeroZeroPercentSeniorNotesDueTwentyTwentySevenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_ThreePointFourFiveZeroPercentSeniorNotesDueTwentyTwentySevenMember" name="ThreePointFourFiveZeroPercentSeniorNotesDueTwentyTwentySevenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_ThreePointTwoZeroZeroPercentSeniorNotesDueTwentyFiftyOneMember" name="ThreePointTwoZeroZeroPercentSeniorNotesDueTwentyFiftyOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_TillerCorporationMember" name="TillerCorporationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_TradeReceivableCreditFacilityMember" name="TradeReceivableCreditFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_TwoPointFiveZeroZeroPercentSeniorNotesDueTwentyThirtyMember" name="TwoPointFiveZeroZeroPercentSeniorNotesDueTwentyThirtyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_TwoPointFiveZeroZeroPercentSeniorNotesDueTwoThousandThirtyMember" name="TwoPointFiveZeroZeroPercentSeniorNotesDueTwoThousandThirtyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_TwoPointFourZeroZeroPercentSeniorNotesDueTwentyThirtyOneMember" name="TwoPointFourZeroZeroPercentSeniorNotesDueTwentyThirtyOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_UseRightsAndOtherMember" name="UseRightsAndOtherMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_WestGroupMember" name="WestGroupMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_WoodvilleMember" name="WoodvilleMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_ZeroPointSixFiveZeroPercentSeniorNotesDueTwentyTwentyThreeMember" name="ZeroPointSixFiveZeroPercentSeniorNotesDueTwentyTwentyThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_ZeroPointSixFiveZeroPercentSeniorNotesMember" name="ZeroPointSixFiveZeroPercentSeniorNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_CommitmentsAndContingenciesTable" name="CommitmentsAndContingenciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_IncomeTaxTable" name="IncomeTaxTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_OtherOperatingIncomeAndExpenseTable" name="OtherOperatingIncomeAndExpenseTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_RevenueRecognitionTable" name="RevenueRecognitionTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_ScheduleOfAcquiredFiniteAndIndefiniteLivedIntangibleAssetByMajorClassTable" name="ScheduleOfAcquiredFiniteAndIndefiniteLivedIntangibleAssetByMajorClassTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_ScheduleOfBusinessCombinationsAndDispositionsTable" name="ScheduleOfBusinessCombinationsAndDispositionsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_SignificantAccountingPoliciesTable" name="SignificantAccountingPoliciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="mlm_BalanceSheetClassificationsOfOperatingAndFinanceLeasesTableTextBlock" name="BalanceSheetClassificationsOfOperatingAndFinanceLeasesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_BasisOfPresentationAndUseOfEstimatesPolicyTextBlock" name="BasisOfPresentationAndUseOfEstimatesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_BusinessCombinationsDivestituresAndDiscontinuedOperationsTextBlock" name="BusinessCombinationsDivestituresAndDiscontinuedOperationsTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_FreightAndDeliveryCostsPolicyTextBlock" name="FreightAndDeliveryCostsPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_LeasesPolicyTextBlock" name="LeasesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_LesseeOperatingAndFinanceLeasesTextBlock" name="LesseeOperatingAndFinanceLeasesTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_OrganizationPolicyTextBlock" name="OrganizationPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_RevenuesAndGrossProfitTextBlock" name="RevenuesAndGrossProfitTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_SalesTaxesPolicyTextBlock" name="SalesTaxesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_ScheduleOfContractsOfAffreightmentAndRoyaltyCommitmentsTableTextBlock" name="ScheduleOfContractsOfAffreightmentAndRoyaltyCommitmentsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_ScheduleOfEntityWideRevenueAndGrossProfitFromExternalCustomersByProductsAndServicesTextBlock" name="ScheduleOfEntityWideRevenueAndGrossProfitFromExternalCustomersByProductsAndServicesTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_ScheduleOfEstimatedServiceLifeOfPropertyPlantAndEquipmentTableTextBlock" name="ScheduleOfEstimatedServiceLifeOfPropertyPlantAndEquipmentTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_ScheduleOfFairValuesOfPensionPlanAssetsByAssetClassAndFairValueHierarchyLevelTableTextBlock" name="ScheduleOfFairValuesOfPensionPlanAssetsByAssetClassAndFairValueHierarchyLevelTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_ScheduleOfFutureMinimumRentalPaymentsForOperatingAndFinancingLeasesTableTextBlock" name="ScheduleOfFutureMinimumRentalPaymentsForOperatingAndFinancingLeasesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_ScheduleOfRevenueByCategoryForReportableSegmentTableTextBlock" name="ScheduleOfRevenueByCategoryForReportableSegmentTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="mlm_ScheduleOfWeightedAverageRemainingLeaseTermsAndDiscountRatesTableTextBlock" name="ScheduleOfWeightedAverageRemainingLeaseTermsAndDiscountRatesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
</xsd:schema>
