摘要
目的为提高灰土的早期强度、增强其水稳定性,扩大工程应用范围.方法将水泥作为一种活性外加剂以不同比例掺入到灰土中对其进行改性.对相同养护条件下的纯二八灰土试样及掺入不同体积分数的水泥灰土试样进行了无侧限抗压强度试验和三轴不固结不排水强度试验研究,并将试验结果进行了整理与比较.结果得到了水泥灰土的强度与龄期、水泥掺入量、含水量、围压、养护条件等因素的关系,浸水后的强度和稳定性与龄期的关系以及相对于同等条件下的纯二八灰土试样的强度增长率等.结论从试验结果分析可知,利用水泥改性后,灰土的早期强度增长能力和水稳定性获得了明显提高.因此,可认为水泥是一种良好的灰土改性外加剂,值得在工程应用中加以推广.
In order to increase the early strength and water stability of lime-treated soil, enhance its range for application, some cement is added into lime-treated soll as an active material to improve its engineering behavior. The pure lime-treated soil and cement volume content cement-lime-treated soil of 2 %, 4 %, 6 % are tested by unconfined compressive strength （UCS） test and UU tri-axial shear test. The relationships between strength with age, cement content, water content, confining pressure and protection situation; strength and stability after inundating with age are analyzed. At the same time, the tests data are compared with pure lime-treated soil. The stress-strain curve of cement-lime-treated soil is depicted. According to the tests results, cement can be seen as a good material increasing lime-treated soil＇ s early strength and water stability.It is worthy to extending use in engineering projects.
出处
《沈阳建筑大学学报（自然科学版）》
EI
CAS
2006年第6期911-915,共5页
Journal of Shenyang Jianzhu University：Natural Science
基金
辽宁省青年科学基金资助项目(20040141026)
关键词
水泥灰土
强度
破坏模式
应力应变曲线
Cement-lime-treated soil
strength
wreck mode
stress-strain curve
