硅酸盐通报2023，Vol.42Issue(12)：4438-4448,11.
基于响应面法的碱激发地聚物固化淤泥质土试验研究
Experimental Study of Alkali-Activated Geopolymer Cured Silty Soil Based on Response Surface Method
摘要
Abstract
In order to achieve the resource utilization of beach silty soil and industrial wastes,and quantitatively optimize the critical factors of geopolymer cured silty soil,the mix ratio of alkali-activated slag-fly ash based geopolymer cured silty soil was optimized based on the Box-Behnken response surface method.The slag content,alkali activator modulus and alkali activator content were selected as the main factors to be investigated,and the curing mechanism was analyzed by combining the macroscopic properties and microscopic morphology.The results show that:the optimum mix ratio of cured soil is slag content 86.5% (mass fraction),alkali activator modulus 0.84,alkali activator content 7.3% (mass fraction),the unconfined compressive strength of cured soil at 7 and 28 d under the optimum mix ratio is 5 823 and 7 027 kPa,respectively.The prediction value has a small error with the actual value,and the established model is accurate and reliable in fitting the actual data.The hydration products of cured soil are mainly amorphous gel hydrated calcium silica-aluminate(C-(A)-S-H)and silica-aluminate polymer(N-A-S-H),which enhance the densification and skeletal structure of soil body,thus improving the strength of cured soil.This study provides a theoretical basis and experimental foundation for alkali-activated geopolymer cured silty soil.关键词
响应面法/碱激发/地聚物/淤泥质土/优化/无侧限抗压强度/微观结构Key words
response surface method/alkali-activation/geopolymer/silty soil/optimization/unconfined compressive strength/microstructure分类
建筑与水利引用本文复制引用
李胜,张红日,王桂尧,邓人睿..基于响应面法的碱激发地聚物固化淤泥质土试验研究[J].硅酸盐通报,2023,42(12):4438-4448,11.基金项目
桂西南地区特殊土联合实验室资助(崇科2023ZY0504) （崇科2023ZY0504）
交通运输部2022年度交通运输行业重点科技项目(2022-MS5-125) （2022-MS5-125）
