摘要
为了研究混杂纤维粉煤灰水泥土冻融损伤特性,对素水泥土与混杂纤维粉煤灰水泥土试样进行冻融循环试验,得到了不同冻融循环次数下水泥土试样外观劣化、质量变化率和无侧限抗压强度的变化规律。结果表明:随着冻融循环次数的增加,素水泥土和混杂纤维粉煤灰水泥土的外观劣化逐渐加重,且前者劣化程度高于后者;质量变化率呈现出先增后降的趋势;无侧限抗压强度随着冻融循环次数的增加而降低,两者无侧限抗压强度在14次冻融循环后分别下降了68.39%和58.67%。建立了损伤变量与冻融循环次数的水泥土冻融损伤劣化方程,可预测冻融循环下水泥土无侧限抗压强度的损伤劣化规律。
In order to study the freeze-thaw damage characteristics of cement soil with hybrid fiber fly ash,freeze-thaw cycle tests were carried out on the plain cement soil and cement soil samples with hybrid fiber fly ash.The change rules of appearance deterioration,mass change rate and unconfined compressive strength of cement soil samples under different freeze-thaw cycles were obtained.The results show that with the increase of the number of freeze-thaw cycles,the appearance deterioration of plain soil-cement and hybrid fiber fly ash soil-cement gradually increase,and the deterioration degree of the former is higher than that of the latter.The mass change rate firstly shows a trend of increasing and then decreasing.The unconfined compressive strength decreases with the increase of the number of freeze-thaw cycles,and the unconfined compressive strength of the two dropes by 68.39%and 58.67%respectively after 14 freeze-thaw cycles.The damage deterioration equations of soil-cement under freeze-thaw cycles and damage variables were established,which could predict the damage deterioration law of unconfined compressive strength of soil-cement under freeze-thaw cycles.
作者
夏香港
张经双
刘永翔
XIA Xianggang;ZHANG Jingshuang;LIU Yongxiang(Research Center of Mine Underground Engineering, Ministry of Education, Anhui University of Science and Technology, Huainan, Anhui 232001, China;School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, Anhui 232001, China)
出处
《中国科技论文》
CAS
北大核心
2022年第4期413-417,共5页
China Sciencepaper
关键词
岩土工程
水泥土
冻融循环
抗压强度
损伤量
geotechnical engineering
cement soil
freeze-thaw cycle
compressive strength
amount of damage
