摘要
以益娄高速膨胀土路基改性处理为例,基于生石灰与熟石灰改性膨胀土的室内试验,进行试验结果的对比,探讨了生、熟石灰改性膨胀土的击实试验和无侧限抗压强度试验确定最佳含水率的方法。研究表明:对比生石灰和熟石灰在击实试验中对干密度的影响可知,最佳含水率下生石灰改性膨胀土的干密度值较大;当掺灰量相同时,无侧限抗压强度随初试含水率的增加先增大后减小,初始含水率大于最佳含水率3%时无侧限抗压强度值最大;对比生石灰和熟石灰对膨胀土无侧限抗压强度的影响可知,生石灰改性膨胀土无侧限抗压强度峰值较大。
Based on engineering background of expansive soil subgrade modification in YI-LOU High-Speed,thecomparative analysis of test results is carried out based on the laboratory test of quicklime and hydratedlime-modified expansive soil.The compaction test and the unconfined compressive strength test of raw andexpansive lime-modified expansive soil are studied deeply to determine the optimum moisture content.The resultsare listed as follows:(1)Comparing the effect of quick lime and hydrated lime on dry density in compaction test,itcan be seen that the dry density value of quicklime modified expansive soil under optimum water content is larger;(2)When the ash content is the same,the unconfined compressive strength increases first and then decreases with theincrease of initial moisture content.When the initial moisture content is more than3%,the unconfined compressivestrength is the higher;(3)compared with the effect of quicklime and hydrated lime on the unconfined compressivestrength of expansive soil,it means that the unconfined compressive strength peak value of quicklime modifiedexpansive soil is larger.
作者
白银涌
陈永青
陈宗辉
孙政
Bai Yinyong;Chen Yongqing;Chen Zonghui;Sun Zheng(School of Civil Engineering and Mechanics, Central South University of Forestry and Technology, Changsha 410018, China)
出处
《湖南文理学院学报（自然科学版）》
CAS
2017年第1期70-73,共4页
Journal of Hunan University of Arts and Science(Science and Technology)
基金
湖南省重点学科建设项目(2013ZDXK006)
关键词
生石灰改性膨胀土
无侧限抗压强度
最佳含水率
击实试验
lime modified expansive soil
unconfined compressive strength
optimum moisture content
compaction test
