浅层淤泥质土固化剂  

Curing Agent for Shallow Mucky Soil

作　　者：徐日庆[1,2] 王旭 文嘉毅[1,2] 朱兵见 XU Riqing;WANG Xu;WEN Jiayi;ZHU Bingjian(Research Center of Coastal and Urban Geotechnical Engineering. Zhejiang University,Hangzhou 310058, China;Zhejiang-California In ternational NanoSystems Institute Taizhou Branch,Taizhou 318000, Zhejiang, China;School of Civil Engineering & Architecture,Taizhou University, Taizhou 318000, Zhejiang, China)

机构地区：[1]浙江大学滨海和城市岩土工程研究中心,杭州310058 [2]浙江加州国际纳米技术研究院台州分院,浙江台州318000 [3]台州学院建筑工程学院,浙江台州318000

出　　处：《上海交通大学学报》2019年第7期805-811,共7页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(41672264);中央高校基本科研业务费专项资金资助项目(2019QNA4041)

摘　　要：滨海地区广泛分布高含水率、高压缩性、低强度的淤泥质土,为了提高地基的早期强度,采用固化剂对淤泥质土进行浅层加固.通过混料试验设计,发现以粉煤灰和生石灰作为基础固化材料,硅酸钠、硫酸钙、氯化钙为添加剂的固化剂能够显著提高固化土的早期强度.以固化土的无侧限抗压强度作为强度指标,得到不同龄期下的强度响应.通过综合分析得到最优的添加剂配比,结合扫描电子显微技术,从反应机理和微观形态进行分析,验证了该固化剂的加固效果且满足工程需要.Coastal areas are widely distributed with muddy soil which has high moisture content, high compressibility and low strength. In order to improve the early strength of the foundation, a curing agent is used to shallow the muddy soil. Through the mixing test design, it was found that fly ash and quicklime were used as the basic curing materials, and the curing agents of sodium silicate, calcium sulfate, and calcium chloride as additives could significantly improve the early strength of solidified soil. The unconfined compressive strength of the solidified soil was used as the strength index to obtain the strength response at different ages. The optimum additive ratio was obtained through comprehensive analysis. Combined with scanning electron microscopy, the reaction mechanism and microscopic morphology were analyzed. The reinforcement effect of this curing agent meets the engineering requirement.

关 键 词：浅层淤泥质土 固化剂 早期强度 二灰 扫描电子显微技术 

分 类 号：TU447[建筑科学—岩土工程]