桂林理工大学学报2017，Vol.37Issue(3)：422-428,7.DOI:10.3969/j.issn.1674-9057.2017.03.005
SH加固酸碱污染黄土的抗压强度特性试验研究
Compressive strength properties of soil pollutd by acid and alkali consolidated by SH
摘要
Abstract
By adding chemical reagents to change the pH value of the loess,acid and alkali pollution loess was obtained in the test.New polymer soil curing agent SH was applied to strengthen the acid and alkali pollution loess.Controling the pH value as a main evaluaton indicator,the compressive strength and stress-strain relationship of polluted soil consolidated with different SH solid contents were measured by unconfined compressive strength test and the reinforcement efficiency of SH under different pollution conditions was got.The optimal pH range of SH consolidation is about 6.43-10.90 and the minimum solid content threshold is about 0.27％.The microstructural parameter variations of the polluted soil were obtained by SEM micrographs and analyzed by Image J software.Acid and alkali contaminants react with the mineral composition in the loess and cause the intergranular cementation material to be corroded.When large pores of the alkaline contaminated soil obviously increased,the sample expanded and the water film thickened,so weakening the overall strength.For the acid contaminated soil,the thinning water film between particles increased the connection strength between the particles greatly.Acid and alkali not only have a direct effect on the SH,but also change the physical and chemical properties of the soil to influence SH reinforcement effect.On the whole,SH is more sensitive to acidic environment.关键词
黄土/pH值/SH固化剂/抗压强度/微观结构Key words
loess/pH value/SH curing agent/compressive strength/microstructure分类
建筑与水利引用本文复制引用
谌文武,刘宏伟,张起勇..SH加固酸碱污染黄土的抗压强度特性试验研究[J].桂林理工大学学报,2017,37(3):422-428,7.基金项目
国家重点基础研究发展规划(973计划)项目(2034CB744701) （973计划）
