岩土力学2025，Vol.46Issue(6)：1700-1708,9.DOI:10.16285/j.rsm.2024.1194
轻质流态固化淤泥回填料基本性能研究
Basic properties of lightweight convection-solidified silt backfill
摘要
Abstract
The treatment and utilization of substantial quantities of waste dredged silt represent a significant challenge in environmental geotechnical engineering at present.Performance-controlled fluidized solidified backfill(PCFS)is prepared using silt as the soil material and cement as the curing material,with expandable polystyrene(EPS)particles and naphthalene superplasticizer as additives.The variations in density,flowability and strength of PCFS and their regulation method were investigated through a series of tests.The PCFS density decreases with the increase of initial moisture ratio and increases with the increase of cement dosage,but the change is small.The PCFS density changes most obviously with the EPS particles dosage(φ),and can be reduced to as low as 0.74 g/cm3.The PCFS flowability decreases with the increase of the EPS particles dosage.The ratio of EPS particles volume to PCFS volume increases by 0.3,the PCFS flowability decreases by 15%-20%.The naphthalene superplasticizer admixture significantly enhances the flowability of PCFS,with an improvement rate of nearly 130%.The PCFS strength increases logarithmically with age,increases as a power function with the increase of cement dosage,and decreases linearly with the increase of initial moisture ratio.A power function relationship exists between PCFS strength and EPS particles dosage within the range of 0.3≤φ≤1.2,with greater sensitivity to EPS particles dosage changes at high cement levels.关键词
淤泥/可发性聚苯乙烯(EPS)/轻质土/流动度/密度/强度Key words
silt/expandable polystyrene(EPS)/lightweight soil/flowability/density/strength分类
建筑与水利引用本文复制引用
黄英豪,毛帅东,张娟,王文翀,王硕..轻质流态固化淤泥回填料基本性能研究[J].岩土力学,2025,46(6):1700-1708,9.基金项目
国家重点研发计划项目(No.2024YFC3211000) （No.2024YFC3211000）
淮河入海水道二期重大工程科研(No.RHSD2/FW-2024-01) （No.RHSD2/FW-2024-01）
南京水利科学研究院挂帅攻关项目(No.Y325007).This work was supported by the National Key Research and Development Program of China(2024YFC3211000),the Scientific Research on the Second Phase of the Major Project of Huai River Seawater Channel(RHSD2/FW-2024-01)and the Key Project of Nanjing Hydraulic Research Institute(Y325007). （No.Y325007）
