碱激发富镁镍渣淤泥固化土USC及机理分析OACSTPCD
USC and Mechanism Analysis of Alkali-Activated Magnesium-Rich Nickel Silt-Cured Soil
研究固化剂质量分数(固化剂掺量)、淤泥水的质量分数及碱激发剂种类等因素对淤泥固化土无侧限抗压强度(UCS)的影响,采用扫描电镜(SEM)、X射线能谱(EDS)分析、X射线衍射(XRD)和压汞仪(MIP)分析淤泥固化土的微观结构,并揭示其作用机理.试验结果表明:碱激发富镁镍渣固化剂能有效固化淤泥土,最高强度可达702 kPa;由淤泥固化土水化反应生成了钠镁硅铝酸盐聚合物凝胶产物(N-M-A-S),凝胶产物通过黏结土体颗粒并填充土体孔隙,使淤泥固化土的结构更加致密紧实.
The effect of factors such as mass fraction of curing agent(dosage of curing agent),mass fraction of sludge water and alkali-activator type on the unconfined compressive strength(UCS)of silt-cured soil was investigated,and the microstructure of silt-cured soil was analyzed using scanning electron microscope(SEM),X-ray energy dispersive spectroscope(EDS)analysis,X-ray diffraction(XRD)and mercury pressure instru-ment(MIP),and the mechanism of the action was revealed.The experimental results show that the silt soil is solidified effectively by the alkali-activated magnesium-rich nickel residue curing agent,and the highest strength reaches 702 kPa.Sodium magnesium silicate aluminate polymer gel product(N-M-A-S)is generated from the hydration reaction of silt-cured soil,which makes the structure of the silt-cured soil more compact by bonding soil particles and filling the pores of the soil body.
许利惟;陈韩;蒋远;吴毅轩;刘雨菲;毛文宫
福建理工大学地下工程福建省高校重点实验室,福建福州 350118||福建理工大学土木工程学院,福建福州 350118福建理工大学 建筑与城乡规划学院,福建福州 350118福建省凯景投资集团有限公司,福建福州 350002
土木建筑
富镁镍渣碱激发淤泥无侧限抗压强度微观机理
magnesium-rich nickel residuealkali-activationsiltunconfined compressive strengthmicro-mechanisms
《华侨大学学报（自然科学版）》 2024 (002)
248-254 / 7
福建省自然科学基金资助项目(2023J01937);福建省住房和城乡建设厅科学技术计划项目(2022-K-214);大学生创新创业训练计划项目(202310388028)
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