河南城建学院学报2026，Vol.35Issue(2)：8-14,23,8.DOI:10.14140/j.cnki.hncjxb.2026.02.002
碳化养护对矿渣-活性MgO-脱硫石膏固化疏浚淤泥耐久性能的影响
Study on the effect of carbonation on the durability of dredged sludge solidified with slag-active MgO-desulphurisation gypsum
摘要
Abstract
This study explores the influence of carbonation treatment on the durability of dredged sludge so-lidified with slag,active magnesium oxide(MgO)and desulphurization gypsum,under the conditions of wet-dry and freeze-thaw cycles.By establishing two distinct groups of control samples(namely,carbonised and non-carbonised)and integrating unconfined coressive strength testing with analytical techniques such as X-ray diffraction(XRD)and scanning electron microscopy(SEM),it systematically evaluates the effects of these two environmental cycles on both the macroscopic mechanical properties and the microscopic morphol-ogy of the solidified dredged sludge.The findings reveal that the mass variations of both carbonised and non-carbonised specimens exhibited relative stability throughout the wet-dry cycling process;conversely,during freeze-thaw cycling,both declined with the increase in cycle numbers.Furthermore,the strength of both specimen types demonstrated a consistent deterioration under the influence of both environmental cy-cling conditions.At an equivalent number of cycles,the residual strength of the carbonised samples was sig-nificantly greater than that of the non-carbonised counterparts,thereby indicating that carbonation treatment substantially enhances the material's capacity to withstand multifaceted environmental disturbances.Micro-structural analysis elucidated that with increasing cycles,the internal porosity of both sample types progres-sively escalated,leading to the formation of microcracks that markedly compromised the interparticle bond-ing forces.Consequently,this culminated in the deterioration of the material's mechanical properties and a concomitant reduction in the strength of the solidified sludge.关键词
疏浚淤泥/矿渣/碳化/耐久性/微观机制Key words
dredged sludge/slag/carbonation/durability/micro-mechanism分类
建筑与水利引用本文复制引用
仵震远,王强..碳化养护对矿渣-活性MgO-脱硫石膏固化疏浚淤泥耐久性能的影响[J].河南城建学院学报,2026,35(2):8-14,23,8.基金项目
国家自然科学基金项目(52308335) （52308335）
安徽省高校科研资助项目(2023AH051170) （2023AH051170）
