Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Bai, Qiyu, He, Guofeng, Wang, Yong, Liu, Jie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
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
_version_ 1784766648724488192
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
work_keys_str_mv AT baiqiyu experimentalinvestigationonmechanicalpropertiesofgeocellstripsatlowtemperature
AT heguofeng experimentalinvestigationonmechanicalpropertiesofgeocellstripsatlowtemperature
AT wangyong experimentalinvestigationonmechanicalpropertiesofgeocellstripsatlowtemperature
AT liujie experimentalinvestigationonmechanicalpropertiesofgeocellstripsatlowtemperature