|Table of Contents|

Influence of chloride ion on salt expansion of coarse-grained sulfate saline soil under multiple factors(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2023年03期
Page:
180-190
Research Field:
Publishing date:

Info

Title:
Influence of chloride ion on salt expansion of coarse-grained sulfate saline soil under multiple factors
Author(s):
ZHAO Kaixuan1; 2;  ZHANG Shasha1; 2;  CHANG Chunpu1; 3;  YANG Xiaohua1; 2
(1. School of Highway, Chang’an University, Xi’an 710064, Shaanxi, China; 2. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi’an 710064, Shaanxi, China; 3. Rear Service Center, Hetian Normal College, Hetian 848000, Xinjiang, China)
Keywords:
roadbed engineering;  coarse-grained saline soil;  salt expansion rate;  cooling test;  chloride ion
PACS:
TU448
DOI:
10.19815/j.jace.2021.11111
Abstract:
In order to find out the influence of chloride ion on the salt expansion properties of coarse-grained sulfate saline soil, manual configuration coarse-grained sulfate saline soil was used to run single factor test of salt content, compaction, moisture content and overburden load. On this basis, single cooling test under multiple factors of coarse-grained sulphate saline soil was carried out, and the influence of chloride salt on the salt expansion properties of coarse-grained sulfate saline soil was studied by adding anhydrous sodium chloride. The results show that the increase of chloride ion content and overburden load has a significant inhibitory effect on the salt expansion of gravel and sand sulfate saline soil. Increasing the compaction in the range of 89%-97% has no significant effect on inhibiting the growth of salt expansion rate of gravel and sand sulphate saline soil. Under the salt content of 7% and 7.85%, the increase of water content has a significant effect on the salt expansion of gravel and sand saline soil. For sand saline soil, the salt content decreases constantly under 2% salt content, firstly increases, and then decreases under 5% salt content and increases under 13.7% salt content. For gravel saline soil, the influence of various factors on salt expansion rate from large to small is salt content, water content, overburden load, compaction and interaction between salt content and water content. For sand saline soil, the influence of various factors on salt expansion rate from large to small is salt content, interaction between salt content and water content, overburden load, compaction and water content.

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Last Update: 2023-05-20