高分子吸水树脂对无机结合料固化土工程性质的影响  

Effect of super absorbent polymer on engineering properties of soil solidified by inorganic binder

作　　者：彭劼[1,2] 商志阳 曹天赐 赵晓婉 戴迪 PENG Jie;SHANG Zhiyang;CAO Tianci;ZHAO Xiaowan;DAI Di(Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China;Geotechnical Research Institute,Hohai University,Nanjing 210098,China;Baotou Steel Survey and Mapping Research Institute,Baotou 014010,China)

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [2]河海大学岩土工程科学研究所,江苏南京210098 [3]包钢勘察测绘研究院,内蒙古包头014010

出　　处：《河海大学学报（自然科学版）》2023年第1期99-104,166,共7页Journal of Hohai University(Natural Sciences)

摘　　要：针对传统无机结合料固化土普遍存在的耐久性及干缩性差的问题,在无机结合料加固淤泥质黏土的基础上添加高分子吸水树脂(SAP)材料,通过无侧限抗压强度试验、击实试验、干湿循环试验、干缩变形试验与XRD测试,分析了SAP材料对无机结合料固化土工程性质的影响及其作用机理。结果表明:掺入SAP材料不仅可以提高无机结合料固化土的无侧限抗压强度,还能显著改善无机结合料固化土的压实性、耐久性与干缩性能;SAP材料主要依靠填充作用改善无机结合料固化土的工程性质。Aiming at the common problems of poor durability and dry shrinkage performance of traditional inorganic-binder solidified soil, super absorbent polymer(SAP) material was added on the basis of mucky clay reinforced by the inorganic binder. Through the unconfined compressive strength test, compaction test, dry wet cycle test, dry shrinkage deformation test and XRD test, the influence and action mechanism of SAP material on the engineering properties of inorganic-binder solidified soil were analyzed and discussed. The test results show that the addition of SAP material can not only improve the unconfined compressive strength of inorganic-binder solidified soil, but also significantly improve the compactness, durability and dry shrinkage performance. Mechanism analysis shows that SAP material mainly depends on the filling effect to improve the engineering properties of inorganic-binder solidified soil.

关 键 词：高分子吸水树脂 无机结合料 压实度 干缩变形 微观机理 

分 类 号：TU472[建筑科学—结构工程]