【摘 要】
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We investigated mechanical properties of concretes made with impurity aggregates of different combinations.Besides the mechanisms were explored by EDS,CT,and hardness testing.The results showed that fully rust-stained and surface rust-stained sandstone ag
【机 构】
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State Key Laboratory of Water Resources & Hydropower Engineering Science, Wuhan University, Wuhan 43
【出 处】
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武汉理工大学学报（材料科学版）（英文版）
论文部分内容阅读
We investigated mechanical properties of concretes made with impurity aggregates of different combinations.Besides the mechanisms were explored by EDS,CT,and hardness testing.The results showed that fully rust-stained and surface rust-stained sandstone aggregate had significant adverse impact on the compressive strength of concrete while sandstone aggregate had a much more obvious impact on the ultimate tension of concrete.Concrete crack was more prone to expand along surfaces and the micro-hardness of interracial transition zone of different aggregates was ranked in decreasing trend as sandstone,slate,SR sandstone,marble,and FR sandstone.The cluster growth of long needle-like ettringite crystal and strong preferential growth trend of Ca(OH)2 crystals would result in wider interracial transition zone range of concretes made with fully rust-stained sandstone and marble aggregate,respectively.Therefore,the impurity aggregate content should be strictly controlled during aggregate selection.
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