硅酸盐通报2025，Vol.44Issue(4)：1513-1524,12.DOI:10.16552/j.cnki.issn1001-1625.2024.1526
硅灰-矿渣-电石渣协同固化黄泛区粉土力学性能与微观机理研究
Mechanical Properties and Microscopic Mechanisms of Yellow Floodplain Silt Solidified by Silica Fume-Ground Granulated Blast Furnace Slag-Carbide Slag Synergy
摘要
Abstract
The engineering properties of yellow floodplain silt are poor,and it needs to be solidified before it can be used as a roadbed fill material.However,traditional solidification solutions require large amounts of cement,and the cement production process consumes large amounts of energy.To solve this problem,silica fume(SF)and ground granulated blast furnace slag(GGBS)were used as precursors,and carbide slag(CS)was used as an exciter,based on the Box-Behnken design(BBD)test in the response surface methodology,to compare and analyse the effects of different mix ratios of silica fume-ground granulated blast furnace slag-carbide slag(SGC)cementitious materials and cement on the mechanical properties and water stability of loess in yellow floodplain,and the microscopic solidified mechanism of the cured soil was explored by using X-ray diffraction(XRD)test and scanning electron microscope(SEM)test.The results show that the optimal mass mix ratio of silica fume,slag and calcium carbide slag is 5.94％∶21.87％∶4.31％.The 7、28 d unconfined compressive strength of solidified soil under this ratio is 6 531.58 and 9 269.26 kPa,respectively,which increase the 7,28 d unconfined compressive strength by 28.3％and 21.4％,respectively,compared with that of the cement solidified soil.SEM and XRD test results show that the main hydration products of SGC solidified soil are cementitious materials such as calcium silicate hydrate(C-S-H)and calcium aluminates hydrate(C-A-H),and the micro-morphology of SGC solidified soil at the age of 28 d is more compact than that of cement solidified soil.The effect of SGC stabilizer on the improvement of loess in yellow floodplain is significant,and it has good engineering application value.关键词
黄泛区粉土/粉土固化/固化剂/响应面法/配合比优化/无侧限抗压强度Key words
yellow floodplain silt/soil solidification/stabilizer/response surface methodology/mix ratio optimization/unconfined compressive strength分类
土木建筑引用本文复制引用
刘彦浩,刘路路,刘涛,张艳,余刘成,张顶飞,战元喆..硅灰-矿渣-电石渣协同固化黄泛区粉土力学性能与微观机理研究[J].硅酸盐通报,2025,44(4):1513-1524,12.基金项目
国家自然科学基金(42277139,42207172) （42277139,42207172）
国家自然科学基金-联合基金重点支持项目(U2006213) （U2006213）
安徽省智能地下探测与环境岩土工程研究中心开放课题(APIUDGERC23KF01) （APIUDGERC23KF01）
