湖南大学学报（自然科学版）2025，Vol.52Issue(11)：89-100,12.DOI:10.16339/j.cnki.hdxbzkb.2025108
基于响应面法的碱-硫酸根激发淤泥流态固化土性能影响分析
Performance Analysis of Alkali-sulfate Activated Sludge Fluid Solidified Soil Based on Response Surface Methodology
摘要
Abstract
Transforming sludge into fluid solidified soil is a novel approach for recycling waste material into treasure and resource utilization.This study aims to evaluate the application performance of an alkali-sulfate activated cementitious curing agent in fluid solidified soil.Using the central composite design(CCD)method,the study elucidates the mechanisms by which water-to-solid ratio and curing agent dosage affect the fluidity,unconfined compressive strength,and water stability coefficient.It also explores the underlying strengthening mechanisms through the evolution of the meso-pore structure.The results indicate that fluidity increases linearly with higher water-to-solid ratios and curing agent dosages.The water stability coefficient negatively correlates with the water-to-solid ratio but positively correlates with the curing agent dosage,although the positive effect diminishes with increasing dosage.In terms of strength development,early-age strength is controlled by the combined effects of water-to-solid ratio and curing agent dosage,while mid-to long-term strength(≥7 d)is primarily dominated by curing agent dosage alone.Lowering the water-to-solid ratio or increasing the curing agent dosage promotes the formation of a dense gel network within the solidified soil,significantly enhancing the unconfined compressive strength.The models established based on CCD show high consistency between predicted and experimental values(R²>0.94),confirming the reliability of the models.Multi-objective optimization results reveal that when the water-to-solid ratio is 0.87 and the curing agent dosage is 12.1%,the fluid solidified soil not only meets the basic requirements for subgrade engineering(fluidity>80 mm,28 d unconfined compressive strength>1.0 MPa,water stability coefficient≥0.8),but also achieves full development of strength across all ages.关键词
固化/淤泥/碱-硫酸根复合激发/响应面法/细观特性Key words
solidification/sludge soil/alkali-sulfate activated/response surface method/meso-structural char-acteristics分类
建筑与水利引用本文复制引用
张玲,叶虔江,周智游..基于响应面法的碱-硫酸根激发淤泥流态固化土性能影响分析[J].湖南大学学报（自然科学版）,2025,52(11):89-100,12.基金项目
国家自然科学基金资助项目(52378340),National Natural Science Foundation of China(52378340) （52378340）
