Improvement of Compressibility and Thaw-Settlement Properties of Warm and Ice-Rich Frozen Soil with Cement and Additives
The warm and ice-rich frozen soil (WIRFS) that underlies roadway embankments in permafrost regions exhibit large compression and thaw deformation, which can trigger a series of distresses. Cement and additives were used in this study to improve the compressibility and thaw-settlement properties of W...
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ftdoajarticles:oai:doaj.org/article:5dd15391f37c439894a59597419963ce 2023-05-15T16:37:19+02:00 Improvement of Compressibility and Thaw-Settlement Properties of Warm and Ice-Rich Frozen Soil with Cement and Additives Mingtang Chai Jianming Zhang 2019-04-01T00:00:00Z https://doi.org/10.3390/ma12071068 https://doaj.org/article/5dd15391f37c439894a59597419963ce EN eng MDPI AG https://www.mdpi.com/1996-1944/12/7/1068 https://doaj.org/toc/1996-1944 1996-1944 doi:10.3390/ma12071068 https://doaj.org/article/5dd15391f37c439894a59597419963ce Materials, Vol 12, Iss 7, p 1068 (2019) permafrost compression coefficient scanning electron microscope (SEM) thaw strain calcium silicate hydrate Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 article 2019 ftdoajarticles https://doi.org/10.3390/ma12071068 2022-12-31T16:22:15Z The warm and ice-rich frozen soil (WIRFS) that underlies roadway embankments in permafrost regions exhibit large compression and thaw deformation, which can trigger a series of distresses. Cement and additives were used in this study to improve the compressibility and thaw-settlement properties of WIRFS. We, therefore, selected optimum additives and studied the improvement effect on the frozen soil with 30% water content based on our previous research. Given constant load and variable temperatures, compression coefficients, thaw strains, and water content changes were obtained at temperatures of −1.0 °C, −0.5 °C, and 2.0 °C to evaluate the effect of improvements. A scanning electron microscope (SEM) was then used to observe the microstructure of improved soils and analyze causal mechanisms. Data show that hydration reactions, physical absorptions, cement, and additives formed new structures and changed the phase of water in frozen soil after curing at −1.0 °C for 28 days. This new structure, cemented with soil particles, unfrozen water, and ice, filled in the voids of frozen soil and effectively decreased the WIRFS compression coefficient and thaw strain. Article in Journal/Newspaper Ice permafrost Directory of Open Access Journals: DOAJ Articles Materials 12 7 1068 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
permafrost compression coefficient scanning electron microscope (SEM) thaw strain calcium silicate hydrate Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 |
spellingShingle |
permafrost compression coefficient scanning electron microscope (SEM) thaw strain calcium silicate hydrate Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Mingtang Chai Jianming Zhang Improvement of Compressibility and Thaw-Settlement Properties of Warm and Ice-Rich Frozen Soil with Cement and Additives |
topic_facet |
permafrost compression coefficient scanning electron microscope (SEM) thaw strain calcium silicate hydrate Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 |
description |
The warm and ice-rich frozen soil (WIRFS) that underlies roadway embankments in permafrost regions exhibit large compression and thaw deformation, which can trigger a series of distresses. Cement and additives were used in this study to improve the compressibility and thaw-settlement properties of WIRFS. We, therefore, selected optimum additives and studied the improvement effect on the frozen soil with 30% water content based on our previous research. Given constant load and variable temperatures, compression coefficients, thaw strains, and water content changes were obtained at temperatures of −1.0 °C, −0.5 °C, and 2.0 °C to evaluate the effect of improvements. A scanning electron microscope (SEM) was then used to observe the microstructure of improved soils and analyze causal mechanisms. Data show that hydration reactions, physical absorptions, cement, and additives formed new structures and changed the phase of water in frozen soil after curing at −1.0 °C for 28 days. This new structure, cemented with soil particles, unfrozen water, and ice, filled in the voids of frozen soil and effectively decreased the WIRFS compression coefficient and thaw strain. |
format |
Article in Journal/Newspaper |
author |
Mingtang Chai Jianming Zhang |
author_facet |
Mingtang Chai Jianming Zhang |
author_sort |
Mingtang Chai |
title |
Improvement of Compressibility and Thaw-Settlement Properties of Warm and Ice-Rich Frozen Soil with Cement and Additives |
title_short |
Improvement of Compressibility and Thaw-Settlement Properties of Warm and Ice-Rich Frozen Soil with Cement and Additives |
title_full |
Improvement of Compressibility and Thaw-Settlement Properties of Warm and Ice-Rich Frozen Soil with Cement and Additives |
title_fullStr |
Improvement of Compressibility and Thaw-Settlement Properties of Warm and Ice-Rich Frozen Soil with Cement and Additives |
title_full_unstemmed |
Improvement of Compressibility and Thaw-Settlement Properties of Warm and Ice-Rich Frozen Soil with Cement and Additives |
title_sort |
improvement of compressibility and thaw-settlement properties of warm and ice-rich frozen soil with cement and additives |
publisher |
MDPI AG |
publishDate |
2019 |
url |
https://doi.org/10.3390/ma12071068 https://doaj.org/article/5dd15391f37c439894a59597419963ce |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Materials, Vol 12, Iss 7, p 1068 (2019) |
op_relation |
https://www.mdpi.com/1996-1944/12/7/1068 https://doaj.org/toc/1996-1944 1996-1944 doi:10.3390/ma12071068 https://doaj.org/article/5dd15391f37c439894a59597419963ce |
op_doi |
https://doi.org/10.3390/ma12071068 |
container_title |
Materials |
container_volume |
12 |
container_issue |
7 |
container_start_page |
1068 |
_version_ |
1766027614533713920 |