Salt expansion properties of sulfate saline soils under one time decrease of water content

doi:10.16285/j.rsm.2016.2855

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Salt expansion properties of sulfate saline soils under one time decrease of water content
	Cao, Ya-Peng 1; Wen, Tao 2; Mi, Hai-Zhen 1; Zhou, Feng-Xi 1; Yang, Peng 1
刊名	Yantu Lixue/Rock and Soil Mechanics
	2018-03-10
卷号	39 期号:3 页码:881-888
关键词	Cooling Shrinkage Soil testing Soils Sulfur compounds Swelling Water content Drying shrinkages Expansion properties Experimental equipments Indoor simulation test Linear correlation One-time Saline soil Testing conditions
ISSN号	10007598
DOI	10.16285/j.rsm.2016.2855
英文摘要	In order to explore salt expansion properties of sulfate saline soils under the decrease of water content, 11 sets of indoor simulation tests under one time decrease of water content, lasting for 2 868 hours, have been carried out using the self-developed experimental equipment. It is shown that the salt content of swelling initiation of sulfate saline soil is 1.2%. The volume of sulfate saline soil shrinks when the salt content of sulfate saline soil is less than 1.2%, and there is an approximate second-degree lower convex parabola correlation between salt expansion rate and salt content. The drying shrinkage rate of sulfate saline soil reaches the maximum value when the salt content is 0.5%. When the salt content is greater than or equal to 1.2%, the volume of sulfate saline soil swells. The salt expansion rate increases with the increase in salt content and there is a linear correlation between the two. The sensitive water content range of salt expansion, slightly influenced by salt content, is generally stable when salt content increases from 1.5% to 4.0%. It can also be concluded that the decrease rate of water content is negatively correlated with the salt content, and the decrease rate of water content in the same salt content decreases with the decrease of water content. Based on the above test results, 4 sets of salt expansion tests have been carried out under single cooling. It is shown that the temperature range initiating swelling of sulfate saline soil gradually goes up and the interval range of salt sensitive temperature range gradually expands with the increase in salt content. According to the test results from two kinds of test conditions, the salt expansion rate of single cooling is higher than the salt expansion rate of one time decrease of water content. However, the difference between the salt expansion rate of the two testing conditions is basically constant with the increase in salt content. It is expected to provide guidance for evaluation on salt expansion of the foundations of residual sulfate saline soil with high salt content in the northwest region of China. © 2018, Science Press. All right reserved.
WOS研究方向	Engineering
语种	中文
出版者	Academia Sinica
WOS记录号	WOS:000444345100014
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114474]
专题	土木工程学院
作者单位	1.College of Civil Engineering, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China; 2.School of Civil and Architectural Engineering, Yangtze Normal University, Chongqing; 408100, China
推荐引用方式 GB/T 7714	Cao, Ya-Peng,Wen, Tao,Mi, Hai-Zhen,et al. Salt expansion properties of sulfate saline soils under one time decrease of water content[J]. Yantu Lixue/Rock and Soil Mechanics,2018,39(3):881-888.
APA	Cao, Ya-Peng,Wen, Tao,Mi, Hai-Zhen,Zhou, Feng-Xi,&Yang, Peng.(2018).Salt expansion properties of sulfate saline soils under one time decrease of water content.Yantu Lixue/Rock and Soil Mechanics,39(3),881-888.
MLA	Cao, Ya-Peng,et al."Salt expansion properties of sulfate saline soils under one time decrease of water content".Yantu Lixue/Rock and Soil Mechanics 39.3(2018):881-888.