Mechanism of pore relative humidity on salt swelling characteristics in sulfate saline soil
| Autor: | Shuquan Peng, Ling Fan, Yang Li, Fan Wang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
chemistry.chemical_classification
Mirabilite Soil salinity Salt swelling rate Soil test General Engineering Temperature Salt (chemistry) Engineering (General). Civil engineering (General) Sulfate saline soil Salinity chemistry.chemical_compound Salt swelling displacement chemistry Sodium sulfate medicine Sulfate Swelling medicine.symptom TA1-2040 Pore relative humidity Nuclear chemistry |
| Zdroj: | Alexandria Engineering Journal, Vol 61, Iss 6, Pp 4963-4976 (2022) |
| ISSN: | 1110-0168 |
| Popis: | Crystallization of sodium sulfate into mirabilite in sulfate saline soil harms the soil potential and intensifies the reparative expenses for subgrade. However, the effects of pore relative humidity (PRH) on the salt swelling behavior have not been thoroughly explored. The multiple-humidity cycles experiments, in this paper, were performed to investigate salt swelling behavior in sulfate saline soil. The effects of different salinity, temperatures, and PRH values on salt swelling displacement (SSD) and salt swelling rate (SSR) of sulfate saline soil were analyzed. The X-ray Diffraction (XRD) technique was employed to investigate the mineral composition of post-experiment soil samples. All test results show that the SSD and SSR of soil samples increase with the increase of PRH and salinity and decreases as the increasing temperature. The enhancement of salt swelling in the presence of PRH was 80-90-80%. Besides, XRD results denote that the existence of mirabilite in the test soil samples verified for the salt swelling to be closely related to PRH in terms of microstructure. All the results further improve the mechanism of salt swelling in sulfate saline soil in the presence of PRH, which is of great significance to analysis and remediation of salt swelling behavior. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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