摘要
为分析建筑再生骨料掺量对湿陷性黄土抗剪强度影响,首先采用重型击实仪确定不同再生骨料掺量湿陷性黄土的最优含水率和最大干密度,制备压实度0.98试样并进行直接剪切试验。结果表明,随建筑再生骨料掺量增加,建筑再生骨料改良湿陷性黄土最大干密度先增大后减小,而最优含水率逐渐降低;建筑再生骨料改良湿陷性黄土黏聚力先减小后增大再减小而内摩擦角先增大后减小,建筑再生骨料掺量为40%时,其黏聚力和内摩擦角均达到最大值。
In order to evaluate the influence of the recycled aggregate content on the shear strength of the collapsible loess soils,the optimum moisture content and maximum dry density of collapsible loess with different recycled aggregate content were determined by preparing test samples with a heavy compactor reaching the degree of compaction of 98%and the direct shear tests were performed.The results show that with the increase of the recycled aggregate content,the maximum dry density of the collapsible loess improved by the recycled aggregate first increases and then decreases,while the optimal moisture content gradually decreases.The cohesion and the internal friction angle of the collapsible loess improved by the recycled aggregate first increases and then decreases.The cohesion of collapsible loess improved by the recycled aggregate from the construction waste first decreases,then increases and then decreases,while the internal friction angle first increases and then decreases.When the content of the recycled aggregate from the construction waste is 40%,the cohesion and the internal friction angle reach the maximum values.
作者
张晓
黄秀粉
ZHANG Xiao;HUANG Xiufen(Construction Management Branch,Qilu Transportation Development Group Co.,Ltd.,Jinan 250000;Shandong Expressway Engineering Testing Co.Ltd.,Jinan 250002)
出处
《土工基础》
2020年第4期525-527,共3页
Soil Engineering and Foundation
关键词
建筑再生骨料
湿陷性黄土
抗剪强度
最优含水率
Recycled Aggregate from Construction Waste
Collapsible Loess
Shear Strength
Optimal Moisture Content
