《Tab.1 Chemical composition of cement》

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《二次水养护对蒸压混凝土长期强度与耐久性能的影响（英文）》

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P獉O 52.5 ordinary Portland cement w as used as the binding materials of concrete.The chemical compositions are show n in Tab.1.Local river sand w ith a fineness modulus of 2.24，local crushed limestone w ith the size of5 to 25 mm，and ordinary tap w ater w ere used as the fine aggregate，coarse aggregate，and mixing w ater，respectively.In addition，a polycarboxylate superplasticizer w as used as a w ater-reducing agent.