LI Shujie，CHANG Lijun

(School of Civil Engineering,Qinghai University,Xining 810016,China)

Abstract:The loess-like saline soil in Haidong City,Qinghai Province was cured by using the regenerated micropowder as the curing agent,and methods of dry blending and wet blending.Mechanical properties and microscopic mechanisms of cured saline soils were investigated by unconfined compressive strength test,SEM and XRD.The results show that the compressive strength of loess-like saline soil is significantly improved by the addition of regenerated fine powder compared with that of natural saline soil,and the wet blending method has a more obvious effect on the strength of the solidified soil.The cemented hydrated calcium silicate and hydrated calcium aluminate are filled in the pores of the soil particles together with the regenerated micropowder,which improves the soil compactness and the strength of the solidified soil.

Keywords:regenerated micropowder；saline soil；curing；mechanical property；compressive strength

中图分类号：TU448                              文献标志码：A

文章编号：1008-5548(2022)05-0030-10

DOI:10.13732/j.issn.1008-5548.2022.05.005

收稿日期： 2022-02-21， 修回日期：2022-03-21，在线出版时间：2022-07-27 14:00。

基金项目：青海省自然科学基金项目：编号：2017-ZJ-791；岩土力学与堤坝工程教育部重点实验室开放基金项目：编号：2019005。

第一作者简介：李舒洁(1997— )，女，硕士研究生，研究方向为岩土及地下工程。E-mail：1456920672@qq.com。

通信作者简介：常立君(1981— )，女，副教授，硕士，硕士生导师，研究方向为黄土、盐渍土工程力学特性。E-mail：changlijun2008@163.com。