全-强风化砂质板岩填料性能及其改良试验  

Experimental Study on Properties and Improvement of Full-Strong Weathered Sandy Slate

作　　者：胡敏[1] 杨果林[2] 周胡波 HU Min;YANG Guolin;ZHOU Hubo(School of Architecture and Art,Hunan University of Science and Technology,Xiangtan 411201,Hunan China;School of Civil Engineering,Central South University,Changsha 410075,China)

机构地区：[1]湖南科技大学建筑与艺术学院,南省湘潭411201 [2]中南大学土木工程学院,湖南长沙410075

出　　处：《吉首大学学报（自然科学版）》2020年第1期62-66,72,共6页Journal of Jishou University(Natural Sciences Edition)

基　　金：国家自然科学基金资助项目（51778641）;中国铁路设计集团有限公司科技开发课题(721630)

摘　　要：对全-强风化砂质板岩进行了室内土工试验,分析其击实参数、级配组成与液塑限值,判定原状土是否适用于高速公路路基的填筑;研究了水泥改良剂的主要性能指标,给出了水泥改良全-强风化砂质板岩的液塑性指标随掺灰量的变化趋势;通过直剪试验,考察掺灰量与侧限养护条件对水泥改良全-强风化砂质板岩剪切强度的影响.The indoor geotechnical test was carried out on the full-strong weathered sandy slate. The compaction parameters, gradation composition, and liquid-plastic limit were analyzed to determine whether the undisturbed soil was suitable for the filling of highway subgrade. The main performance indexes of cement improvers were studied. The liquid plasticity index of cement-modified whole-strong weathered sandy slate was studied different ash-added amount. Through direct shear test, the amount of ash added and the presence or absence of confinement were considered. The effect of conditions on the strength of cement-modified full-strong weathered sandy slate was studied.

关 键 词：全-强风化砂质板岩 室内试验 水泥改良 养护条件 

分 类 号：U214.11[交通运输工程—道路与铁道工程]