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。
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.
作者
冯琦
王宇斌
FENG Qi;WANG Yu-bin(Department of Architectural Engineering,Xi′an Institute of Foreign Affairs,710077,China;School of Civil Engineering,Xi′an University of Architecture and Technology,710055,China)
出处
《混凝土与水泥制品》
北大核心
2020年第8期88-91,共4页
China Concrete and Cement Products
基金
国家自然科学基金项目(51974218)。
