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  <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_EastGroupMember" name="EastGroupMember" 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_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_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_LehighHansonIncorporationWestRegionMember" name="LehighHansonIncorporationWestRegionMember" 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_OtherNotesMember" name="OtherNotesMember" 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_SevenPercentDebenturesDueTwentyTwentyFiveMember" name="SevenPercentDebenturesDueTwentyTwentyFiveMember" 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_SouthernCrushedConcreteMember" name="SouthernCrushedConcreteMember" 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_ThreePointFourFivePercentSeniorNotesDueTwentyTwentySevenMember" name="ThreePointFourFivePercentSeniorNotesDueTwentyTwentySevenMember" 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_TwoPointFourZeroZeroPercentSeniorNotesDueTwentyThirtyOneMember" name="TwoPointFourZeroZeroPercentSeniorNotesDueTwentyThirtyOneMember" 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_ZeroPointSixFiveZeroPercentSeniorNotesDueTwentyTwentyThreeMember" name="ZeroPointSixFiveZeroPercentSeniorNotesDueTwentyTwentyThreeMember" 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_RevenueRecognitionTable" name="RevenueRecognitionTable" 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_BusinessCombinationsAndDiscontinuedOperationsTextBlock" name="BusinessCombinationsAndDiscontinuedOperationsTextBlock" 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_NoncurrentDeferredTaxAssetsRecordedInAccumulatedOtherComprehensiveLossTableTextBlock" name="NoncurrentDeferredTaxAssetsRecordedInAccumulatedOtherComprehensiveLossTableTextBlock" 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_PolicyElectionsPolicyTextBlock" name="PolicyElectionsPolicyTextBlock" 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_ScheduleOfEntityWideRevenueAndGrossProfitFromExternalCustomersByProductsAndServicesTextBlock" name="ScheduleOfEntityWideRevenueAndGrossProfitFromExternalCustomersByProductsAndServicesTextBlock" 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:schema>
