黄土固化剂及固化土养护液的配方优化研究
Formulation Optimization of Ili Loess Soil Stabilizer and Stabilized Soil Curing Liquid
郭昊炜 1鞠鹏 1张豪 2樊恒辉 1高建恩 3孙胜利4
作者信息
- 1. 西北农林科技大学 水利与建筑工程学院,陕西 杨凌 712100
- 2. 昆明理工大学 电力工程学院,云南 昆明 650500
- 3. 中国科学院水利部水土保持研究所,陕西 杨凌 712100
- 4. 郑州华之誉新材料科技有限公司,河南 巩义 451200
- 折叠
摘要
为提高土体固化剂加固新疆伊犁州黄土的固化效果,通过正交试验及AHP-CRITIC主客观综合赋权法,进行黄土土体固化剂及固化土养护液配方优化试验,优化结果为:得到土体固化剂及固化土养护液的配方及各组分的优属度,在 12%水泥掺量条件下,MBER土体固化剂的最优配合比为 9%石灰、2%石膏、0.3%硫酸钠、0.3%硅酸钠、0.3%明矾、1.2%减水剂,其 7d龄期的饱水无侧限抗压强度为3.23 MPa,干燥无侧限抗压强度为 10.23 MPa,软化系数为 0.32;固化土养护液的最优配合比为 0.10 mol/L碳酸氢钠溶液、0.04 mol/L硫酸钠溶液、2%纳米二氧化硅溶胶,其3d、7d和 14d的饱水无侧限抗压强度分别为1.88 MPa、3.76 MPa和5.22 MPa,其7d无侧限抗压强度相较于标准养护及纯水养护分别提高16.43%和13.00%,具有明显效果.
Abstract
In order to improve the stabilized effect of soil stabilizer on loess in Ili Prefecture,Xinjiang,the formula of soil stabilizer and stabilized soil curing liquid and the priority of each component were calculated by orthogonal test and AHP-CRITIC subjective and objective comprehensive weighting method.Under the condition of 12%cement content,the optimal mix ratio of MBER soil stabilizer is 9%lime,2%gypsum,0.3%sodium sulfate,0.3%sodium silicate,0.3%alum and 1.2%water reducing agent.The saturated unconfined compressive strength of 7 d age is 3.23 MPa,the dry unconfined compressive strength is 10.23 MPa,and the softening coefficient is 0.32.The optimal mixture ratio of stabilized soil curing liquid is 0.10 mol/L sodium bicarbonate solution,0.04 mol/L sodium sulfate solution and 2%nano-silica sol.The saturated unconfined compressive strength of 3 d,7 d and 14 d is 1.88 MPa,3.76 MPa and 5.22 MPa.Compared with standard curing and pure water curing,the 7 d unconfined compressive strength of the soil stabi-lized by this curing solution is increased by 16.43%and 13.00%,respectively.
关键词
伊犁州黄土/土体固化剂/养护液/固化土/配方优化Key words
Ili loess/soil stabilizer/curing liquid/stabilized soil/formulation optimization引用本文复制引用
基金项目
国家重点研发计划(2021YFD1900700)
国家自然科学基金(52079116)
出版年
2024
NETL
NSTL
维普
万方数据