冯 琦1,王宇斌2
冯琦,王宇斌.硫酸盐-冻融耦合环境下粉煤灰再生混凝土的耐久性研究[J].混凝土与水泥制品,2020(8):88-91.
FENG Q,WANG Y B.Study of the Durability of Fly Ash Recycled Concrete Under Sulfate-freeze-thaw Coupling Environment[J].China Concrete and Cement Products,2020(8):88-91.
硫酸盐-冻融耦合环境下粉煤灰再生混凝土的耐久性研究
冯 琦1,王宇斌2
冯琦,王宇斌.硫酸盐-冻融耦合环境下粉煤灰再生混凝土的耐久性研究[J].混凝土与水泥制品,2020(8):88-91.
FENG Q,WANG Y B.Study of the Durability of Fly Ash Recycled Concrete Under Sulfate-freeze-thaw Coupling Environment[J].China Concrete and Cement Products,2020(8):88-91.
摘 要:研究了不同粉煤灰取代率的再生混凝土在硫酸盐-冻融耦合环境下的质量损失率和相对动弹性模量的变化规律,并采用两参数Weibull函数建立了寿命预测模型。结果表明,在硫酸盐-冻融耦合环境下,随着冻融次数的增加,各组试件的相对动弹性模量和质量均呈现先上升后下降的趋势;当粉煤灰取代率为30%时,试件在硫酸盐-冻融耦合环境下的耐久性最优,最多可经受362次硫酸盐-冻融循环后才会失效。
Abstract: The mass loss rate and relative dynamic elastic modulus of recycled concrete with different replacement rate of fly ash under sulfate-freeze-thaw coupling environment were studied, and the life prediction model was established by using two-parameter weibull function. The results show that the relative dynamic elastic modulus and mass of each group of specimens increase first, and then decrease with the increase of freeze-thaw times under sulfate-freeze-thaw coupling environment. When the replacement rate of fly ash is 30%, the durability of specimens under sulfate-freeze-thaw coupling environment is the strongest, and it will fail only after 362 sulfate-freeze-thaw cycles at most.
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