东南大学学报（自然科学版）2025，Vol.55Issue(3)：726-734,9.DOI:10.3969/j.issn.1001-0505.2025.03.012
利用熟石灰配合PC/FDN的淤泥质渣土高强碳化造粒方法研究
Study on high-strength carbonization granulation method of muddy soil using slaked lime and PC/FDN
摘要
Abstract
To solve the problem of waste muddy soil treatment and realize diversified utilization,a method for making high-strength particles from waste muddy soil is proposed.Silty soil is modified by slaked lime mixed with polycarboxylate(PC)water reducer or naphthalene(FDN)water reducer.12 mm particles are fabricated and carbonization curing is conducted under constant temperature and humidity conditions.The results show that the particle crushing strength is only 3.0 MPa when only slaked lime is added,while the maximum crush-ing strengths are 8.0 and 4.2 MPa when PC and FDN are added,respectively.The carbonization rate of the PC group particles is only 70%to 80%,while that of the FDN group particles is more than 90%.Due to the high particle density of the PC group,the carbonization reaction can be inhibited.Uncarbonized calcium hy-droxide and active oxides can form gel,which cements and fills the pores,improving the crushing strength of the PC group particles.The PC group particles have higher crushing strength but lower carbonization rate,which is suitable for filling embankment base.However,the FDN group particles have lower crushing strength but higher carbonization rate,which can be used to replace part of the sand and gravel aggregate in concrete.This technology provides a new solution for treating muddy soil,fixing carbon and reducing carbon.关键词
淤泥质渣土/渣土改性/碳化造粒/人造颗粒/减水剂Key words
muddy soil/muck modification/carbonization granulation/artificial aggregate/water reducer分类
交通工程引用本文复制引用
曹志刚,庄峻淇,申昆鹏,胡宏,万东兴..利用熟石灰配合PC/FDN的淤泥质渣土高强碳化造粒方法研究[J].东南大学学报（自然科学版）,2025,55(3):726-734,9.基金项目
国家自然科学基金资助项目(51978611) （51978611）
浙江省自然科学基金资助项目(LR21E080004) （LR21E080004）
浙江大学-浙江交工集团协同创新研究院资助项目(ZDJG2021011). （ZDJG2021011）
