首页|Analysis of Sulfate Corrosion Resistance and Reliability of Recycled Concrete

Analysis of Sulfate Corrosion Resistance and Reliability of Recycled Concrete

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In order to study the effect of different recycled fine aggregate and recycled coarse aggregate substitution rate on the sulfate resistance of recycled concrete under dry-wet cycle conditions,the substitution rate of recycled fine aggregate and recycled coarse aggregate was designed to be 0％/0％,10％/0％,0％/25％,10％/25％,0％/50％ and 10％/50％ of the six groups of mixture ratio.The mass loss rate and relative dynamic modulus of each group of test blocks were tested respectively and the optimal ratio was selected.The Wiener distribution probability method was used to establish the reliability function to optimize the remaining life of the ratio.The results show that the dynamic elastic modulus and mass show a trend of increasing first and then decreasing during the dry-wet cycles of sulfate.The recycled concrete has the strongest resistance to sulfate attack under the substitution rate of recycled fine aggregate and recycled coarse aggregate is 10％ and 0％,and the test blocks will be damaged after being subjected to 182 times of dry-wet cycles of sulfate.The effect of recycled coarse aggregate on the sulfate attack resistance of the test block is more obvious than that of the recycled fine aggregate,which leads to the durability of the concrete being greatly reduced.

recycled concretedry-wet cycles of sulfatethe Wiener distribution probabilitymicroscopic reaction mechanism

QIAO Hongxia、ZHU Xiangchen、CHEN Kefan、PENG Kuan

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College of Civil Engineering, Lanzhou University of Technology, Lanzhou 730000, Gansu, China

Supported by the National Natural Science Foundation of ChinaSupported by the National Natural Science Foundation of China

5146803951868044

2020

10.19823/j.cnki.1007-1202.2020.0025

武汉大学自然科学学报(英文版)
武汉大学

武汉大学自然科学学报(英文版)

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影响因子：0.066
ISSN：1007-1202
年,卷(期)：2020.25(3)
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