建筑 混凝土 外文翻译 外文文献 英文文献 混凝土裂缝.docTHECRACKOFCONCRETEcracksConcretecracksformanyreasons,mainlytemperatureandhumiditychanges,thebrittlenessofconcreteanduneven,aswellasunreasonablestructure,failureofrawmaterials(suchasalkali・aggrega(creaction),templatedeformation,,theinternaltemperaturerising,,duetocoagulationonthebasisoftheconstraintsorold,urwithinthetensilestressintheconcrete・,thecrackswillappear・Manyoftheinternalhumidityofconcretewithlittleorchangesslowly,,failedtokeepdrywhenwet,thesurfaceofconcreteshrinkagedeformationbyinternalconstraints,butalsooftenleadstocracks・Concreteisabrittlematerial,pressivestrengthofabout1/10,short-termultimatetensiledeformationduringloadingonly(〜)x104,thelimitpositionwhenthelong-termloadingelongationonly(〜),unstablewater-cementratio,andtransportandSegregationinthepouringprocess,inthesamepieceofconcreteinthetensilestrengthisuneven,therearealotoftensilestrengthlow,easy-to-,
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