水基聚合物固化土强度增长规律研究  

Study on Strength Growth Law of Water-based Polymer Solidified Soil

作　　者：任瑞波[1] 王振[1] 薄剑 周浩[1] 赵品晖 REN Ruibo;WANG Zhen;BO Jian;ZHOU Hao;ZHAO Pinhui(Shandong Jianzhu University,Jinan 250101,China;Binzhou City Bincheng District Qingtian Street Office,Binzhou 256660,Shandong,China)

机构地区：[1]山东建筑大学,济南250101 [2]滨州市滨城区青田街道办事处,山东滨州256660

出　　处：《路基工程》2022年第2期16-22,共7页Subgrade Engineering

基　　金：国家自然科学基金项目(51608511)。

摘　　要：选用一种新型水基聚合物材料作为固化剂,研究水基聚合物掺量和失水养护温度、时间对固化土强度影响规律,建立失水率与固化土强度的关联关系。结果表明:水基聚合物会略微降低固化土早期(3天)强度,但失水养护后期(4~7天)强度明显提升,掺量越高,效果越明显。温度升高能提高固化土强度增长速度,提高无侧限抗压强度的终期(7天后)强度,但会降低养护完全时的间接抗拉强度。水基聚合物固化土强度形成,主要是由于水基聚合物与土颗粒之间的氢键作用以及碳长链在土颗粒之间扩散生成网状结构形成黏结作用导致,强度增长随失水率的增长而逐渐加快。Selecting a new type of water-based polymer material as curing agent, the effects of water-based polymer content, water loss curing temperature and time on the strength of solidified soil have been studied, and the relationship between water loss rate and the strength of solidified soil has been established. The results show that the water-based polymer will slightly reduce the early(3 d) strength of solidified soil, but the strength at the later stage(4~ 7 d) is significantly improved. The higher the dosage is, the more obvious the effect is. The increase of temperature can increase the strength growth rate of solidified soil, improve the ultimate strength of unconfined compressive strength(after 7 days), but reduce the indirect tensile strength when the curing is complete. The strength formation of water-based polymer solidified soil is mainly due to the hydrogen bonding between water-based polymer and soil particles and the bonding effect of the network structure formed by the diffusion of long carbon chains between soil particles. The strength growth gradually accelerates with the increase of water loss rate.

关 键 词：水基聚合物固化土 无侧限抗压强度 间接抗拉强度 水基聚合物掺量 失水养护温度 失水率 

分 类 号：U414[交通运输工程—道路与铁道工程]