摘要
针对高液限土水稳定性差的问题,研究了再生骨料掺量、粒径及砖混比对改良土击实特性和崩解特性的影响,并分析了改良机理。结果表明:随着再生骨料掺量的增加,改良土最大干密度和最优含水率逐渐降低;随着再生骨料掺量的增加,试样崩解时间先增大后减小,在掺量为15%时,抗崩解性最好;粒径较小的再生骨料对高液限土的改良效果更好,0.075~2.000 mm的再生骨料崩解速率慢,同一时间崩解剩余量更多;砖混比为1∶2时改良效果最优;崩解速率主要与试样裂缝大小有关,试样裂缝越大,抗崩解性越差。
To address the poor water stability of the high liquid limit soil,the effects of different recycled aggregate content,particle size and brick-to-concrete ratio on the compaction and disintegration characteristics of the improved soil were studied,and the improvement mechanism was analyzed.The test results show that with the content of recycled aggregate increases,the maximum dry density and optimal water content of the improved soil gradually decrease.With the content of recycled aggregate increases,the disintegration time of the specimen first increases and then decreases,and the disintegration resistance is best when the content is 15%.The recycled aggregate with smaller particle size has better improvement effect on high liquid limit soil,the recycled aggregate with 0.075-2.000 mm has slow disintegration rate and more remaining disintegration at the same time.The improvement effect is best when the brick-to-concrete ratio is 1∶2.The disintegration rate is mainly related to the size of the sample cracks.The larger the sample cracks,the worse the disintegration resistance.
作者
马强
胡泽礼
胡智
刘培玉
MA Qiang;HU Zeli;HU Zhi;LIU Peiyu(School of Civil Engineering,Architecture and Environment,Hubei University of Technology,Wuhan 430068,China;Zhejiang Scientific Research Institute of Transport,Hangzhou 310023,China;China Water Resources and Hydropower Fourth Engineering Bureau Co.,Ltd.,Xining 810000,China)
出处
《中国科技论文》
CAS
北大核心
2023年第2期186-192,共7页
China Sciencepaper
基金
国家自然科学基金资助项目(52078194,51708190)
浙江省基础公益研究计划项目(LGF22E080029)。
关键词
高液限土
建筑垃圾
击实试验
崩解特性
改良机理
high liquid limit soil
construction waste
compaction test
disintegration characteristic
improvement mechanism
