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Experimental Investigation on Mechanical Properties of Geocell Strips at Low Temperature
Geocell is widely used in the treatment of poor roadbed, which can restrain soil laterally and improve the stability of soil. In cold area engineering, a change in temperature can influence the mechanical properties of geocell of different materials. To study the mechanical response of geocell at lo...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9369987/ https://www.ncbi.nlm.nih.gov/pubmed/35955390 http://dx.doi.org/10.3390/ma15155456 |
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author | Bai, Qiyu He, Guofeng Wang, Yong Liu, Jie |
author_facet | Bai, Qiyu He, Guofeng Wang, Yong Liu, Jie |
author_sort | Bai, Qiyu |
collection | PubMed |
description | Geocell is widely used in the treatment of poor roadbed, which can restrain soil laterally and improve the stability of soil. In cold area engineering, a change in temperature can influence the mechanical properties of geocell of different materials. To study the mechanical response of geocell at low temperatures, three types of geocell strips commonly used in engineering, namely the polyethylene (HDPE), polypropylene (PP), and polyester (PET), were studied via the uniaxial tensile test at the ambient temperatures of −5 °C, −20 °C, and −35 °C, respectively. Meanwhile, the tensile strength, fracture mode, and temperature sensitivity of geocell specimens were compared. It is concluded that: (1) at low temperatures, the tensile strengths of HDPE and PET geocell strips are significantly improved, while that of the PP geocell strip is less sensitive to the temperature. (2) The PP geocell is subject to a brittle failure at all ambient temperatures. The PET geocell strip experiences a hard-ductile failure at normal temperatures of −5 °C and −20 °C. While in the tensile test at −35 °C, it is prone to brittle failure and hard-ductile failure. The HDPE geocell strip suffers from ductile failure at all ambient temperatures. (3) At low temperatures, overall, the tensile properties of the PET geocell strip is better than those of the PP and HDPE geocell strips. |
format | Online Article Text |
id | pubmed-9369987 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-93699872022-08-12 Experimental Investigation on Mechanical Properties of Geocell Strips at Low Temperature Bai, Qiyu He, Guofeng Wang, Yong Liu, Jie Materials (Basel) Article Geocell is widely used in the treatment of poor roadbed, which can restrain soil laterally and improve the stability of soil. In cold area engineering, a change in temperature can influence the mechanical properties of geocell of different materials. To study the mechanical response of geocell at low temperatures, three types of geocell strips commonly used in engineering, namely the polyethylene (HDPE), polypropylene (PP), and polyester (PET), were studied via the uniaxial tensile test at the ambient temperatures of −5 °C, −20 °C, and −35 °C, respectively. Meanwhile, the tensile strength, fracture mode, and temperature sensitivity of geocell specimens were compared. It is concluded that: (1) at low temperatures, the tensile strengths of HDPE and PET geocell strips are significantly improved, while that of the PP geocell strip is less sensitive to the temperature. (2) The PP geocell is subject to a brittle failure at all ambient temperatures. The PET geocell strip experiences a hard-ductile failure at normal temperatures of −5 °C and −20 °C. While in the tensile test at −35 °C, it is prone to brittle failure and hard-ductile failure. The HDPE geocell strip suffers from ductile failure at all ambient temperatures. (3) At low temperatures, overall, the tensile properties of the PET geocell strip is better than those of the PP and HDPE geocell strips. MDPI 2022-08-08 /pmc/articles/PMC9369987/ /pubmed/35955390 http://dx.doi.org/10.3390/ma15155456 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Bai, Qiyu He, Guofeng Wang, Yong Liu, Jie Experimental Investigation on Mechanical Properties of Geocell Strips at Low Temperature |
title | Experimental Investigation on Mechanical Properties of Geocell Strips at Low Temperature |
title_full | Experimental Investigation on Mechanical Properties of Geocell Strips at Low Temperature |
title_fullStr | Experimental Investigation on Mechanical Properties of Geocell Strips at Low Temperature |
title_full_unstemmed | Experimental Investigation on Mechanical Properties of Geocell Strips at Low Temperature |
title_short | Experimental Investigation on Mechanical Properties of Geocell Strips at Low Temperature |
title_sort | experimental investigation on mechanical properties of geocell strips at low temperature |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9369987/ https://www.ncbi.nlm.nih.gov/pubmed/35955390 http://dx.doi.org/10.3390/ma15155456 |
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