离子型土壤固化剂固化土基层试验研究  

Experimental Study on Solidification of Soil Base with Ionic Soil Solidification Agent

作　　者：陈明明 黄伟[1] 邱鹏 赵鲁卿 王宗森 CHEN Mingming;HUANGWei;QIU Peng;ZHAO Luqing;WANG Zongsen(Institute of Civil Engineering,Anhui University of Technology,Maanshan 243032,China;Anhui Maanshan Jiahua New Building Materials Co.,Ltd.,Maanshan 243000,China)

机构地区：[1]安徽工业大学建筑工程学院,安徽马鞍山243032 [2]安徽马钢嘉华新型建材有限公司,安徽马鞍山243000

出　　处：《安徽工业大学学报（自然科学版）》2021年第1期97-103,共7页Journal of Anhui University of Technology（Natural Science）

基　　金：安徽省高校自然科学研究重大项目(KJ2018ZD006);安徽省住房城乡建设科学技术计划项目(2018YF-007)。

摘　　要：以7 d无侧限抗压强度为评价指标,采用YES等3种离子型土壤固化剂进行固化土适配试验,确定YFS固化土适宜配合比,研究龄期、含水率、养护方式、浸水时间、压实度对YFS固化土无侧限抗压强度的影响,结合微观试验揭示固化土强度形成机理。结果表明:固化土适宜配合比为素土及按其质量比外掺0.02%(质量分数,下同)YFS固化剂、5%水泥;随龄期增长、压实度提升,固化土强度均有所提高;随含水率增加,固化土强度呈先增后减趋势;室温养护强度略低于标准养护强度,不同标准养护龄期试件强度随浸水时间延长略有下降,水稳定性良好;固化剂掺入后无新物质产生,可改善土壤颗粒结合方式,其微观结构以团聚体层叠为主;水泥掺入后有明显水化产物C—S—H凝胶生成,将其填充于团聚体间隙,土体整体结构更为密实,可提高土体抗压强度。Taking 7 d unconfined compressive strength as the evaluation index,three ionic soil solidification agents such as YES were used to carry out the solidified soil adaptation test to determine the appropriate mixing ratio of YFS solidified soil.The effects of age,water content,curing method,soaking time and compaction degree on the unconfined compressive strength of YFS solidified soil were studied,and the formation reason of solidified soil strength was revealed by combining with microscopic tests.The results show that the suitable mix ratio of the solidified soil is plain soil and mixed with 0.02%(mass fraction,the same below)YFS curing agent and 5%cement according to its mass ratio;With the increase of age and compactness,the strength of solidified soil increases;With the increase of water content,the strength of solidified soil first increases and then decreases;The room temperature curing strength is slightly lower than the standard curing strength,the strength of the specimen with different standard curing ages decreases slightly with the prolonged water immersion time,and the water stability is good;There is no new material after adding the solidified agent,which can improve the combination mode of soil particles,and the microstructure is mainly composed of aggregates;The hydration product C—S—H gel is formed after cement incorporation,which is filled in the gaps of the aggregates,and makes the overall structure of the soil more compact,and improves the compressive strength of the soil.

关 键 词：离子土壤固化剂 固化土 适宜配合比 无侧限抗压强度 

分 类 号：U414.1[交通运输工程—道路与铁道工程]