Abstract: Capillary water absorption occurs in solidified soft soil above the groundwater level, which may have an adverse impact on durability of solidified soil. The soft soil was solidified with soda residue (SR), ground granulated blast furnace slag and carbide slag. The capillary water absorption, unconfined compressive strength (UCS), X-ray diffraction and nuclear magnetic resonance tests of solidified soil under different water absorption environments were carried out to study the variation of capillary transport coefficient and strength and its microscopic mechanism. The results show that the ratio of capillary coefficient (κ) to capillary sorptivity (s) are in the range of 2.3 to 3.2. The s and κ of solidified soil decrease at first and then increase with the increase of SR content, and the minimum s and κ values and capillary pore volume occur at 25% SR content. With the increase of salt concentration, more ettringite is generated and sodium chloride migrates and aggregates. Accordingly, the volume of capillary pores and the capillary absorption capacity of solidified soil increase, which contributes to the increase of s and κ values and the decrease of UCS. The decrease in UCS at seawater environment for SR solidified soil is greater than that for cement solidified soil. It is necessary to pay attention to the adverse effect of capillary absorption on durability of soil solidified with industrial solid wastes such as SR.
通讯作者:
* 何俊,湖北工业大学土木建筑与环境学院教授、博士研究生导师。2000年吉林大学岩土工程专业本科毕业,2003年吉林大学岩土工程专业硕士毕业,2006年河海大学岩土工程专业博士毕业后到湖北工业大学工作至今。目前主要从事环境岩土工程、固体废弃物资源化利用等方面的研究工作。发表论文30余篇,包括Construction and Building Materials、Waste Management、 Journal of Materials in Civil Engineering、Water Science and Engineering、《岩土力学》等。hjunas@163.com
引用本文:
何俊, 罗时茹, 龙思昊, 朱元军. 不同吸水环境下碱渣固化淤泥毛细吸水和强度性质[J]. 材料导报, 2024, 38(9): 22100254-6.
HE Jun, LUO Shiru, LONG Sihao, ZHU Yuanjun. Capillary Water Absorption and Strength of Soft Soil Solidified with Soda Residue Under Different Water Environments. Materials Reports, 2024, 38(9): 22100254-6.
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2024, Vol. 38 
