Cargando…

Study on the Frost Resistance of Concrete Modified with Steel Balls Containing Phase Change Material (PCM)

In order to investigate the effect of phase change materials on the frost resistance of concrete in cold regions, hollow steel balls were used in this paper for the macroscopic encapsulation of the phase change material to replace some of the coarse aggregates in the preparation of phase change conc...

Descripción completa

Detalles Bibliográficos
Autores principales: Yuan, Xiaosa, Wang, Baomin, Chen, Peng, Luo, Tao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8399197/
https://www.ncbi.nlm.nih.gov/pubmed/34443020
http://dx.doi.org/10.3390/ma14164497
_version_ 1783745018809286656
author Yuan, Xiaosa
Wang, Baomin
Chen, Peng
Luo, Tao
author_facet Yuan, Xiaosa
Wang, Baomin
Chen, Peng
Luo, Tao
author_sort Yuan, Xiaosa
collection PubMed
description In order to investigate the effect of phase change materials on the frost resistance of concrete in cold regions, hollow steel balls were used in this paper for the macroscopic encapsulation of the phase change material to replace some of the coarse aggregates in the preparation of phase change concrete. On the premise of ensuring reasonable mechanical properties, concrete mixed with different contents and different surface treatments of grouting steel balls were tested for the compressive strength and splitting tensile strength to determine the optimum content of phase change steel balls and investigate the frost resistance of phase change concrete. At the same time, industrial CT was used to explore the internal pore evolution pattern of concrete during the freeze–thaw period. The test results show that the optimum content of steel balls is 75%; during the freeze–thaw process, the mass loss, relative dynamic elastic modulus loss, and strength loss of phase change concrete are all lower than those of ordinary concrete, and the increase in porosity of phase change concrete is also significantly lower than that of ordinary concrete; the addition of phase change materials can optimise the distribution of the internal pore in concrete, improve its internal pore structure, and enhance its frost resistance.
format Online
Article
Text
id pubmed-8399197
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-83991972021-08-29 Study on the Frost Resistance of Concrete Modified with Steel Balls Containing Phase Change Material (PCM) Yuan, Xiaosa Wang, Baomin Chen, Peng Luo, Tao Materials (Basel) Article In order to investigate the effect of phase change materials on the frost resistance of concrete in cold regions, hollow steel balls were used in this paper for the macroscopic encapsulation of the phase change material to replace some of the coarse aggregates in the preparation of phase change concrete. On the premise of ensuring reasonable mechanical properties, concrete mixed with different contents and different surface treatments of grouting steel balls were tested for the compressive strength and splitting tensile strength to determine the optimum content of phase change steel balls and investigate the frost resistance of phase change concrete. At the same time, industrial CT was used to explore the internal pore evolution pattern of concrete during the freeze–thaw period. The test results show that the optimum content of steel balls is 75%; during the freeze–thaw process, the mass loss, relative dynamic elastic modulus loss, and strength loss of phase change concrete are all lower than those of ordinary concrete, and the increase in porosity of phase change concrete is also significantly lower than that of ordinary concrete; the addition of phase change materials can optimise the distribution of the internal pore in concrete, improve its internal pore structure, and enhance its frost resistance. MDPI 2021-08-11 /pmc/articles/PMC8399197/ /pubmed/34443020 http://dx.doi.org/10.3390/ma14164497 Text en © 2021 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
Yuan, Xiaosa
Wang, Baomin
Chen, Peng
Luo, Tao
Study on the Frost Resistance of Concrete Modified with Steel Balls Containing Phase Change Material (PCM)
title Study on the Frost Resistance of Concrete Modified with Steel Balls Containing Phase Change Material (PCM)
title_full Study on the Frost Resistance of Concrete Modified with Steel Balls Containing Phase Change Material (PCM)
title_fullStr Study on the Frost Resistance of Concrete Modified with Steel Balls Containing Phase Change Material (PCM)
title_full_unstemmed Study on the Frost Resistance of Concrete Modified with Steel Balls Containing Phase Change Material (PCM)
title_short Study on the Frost Resistance of Concrete Modified with Steel Balls Containing Phase Change Material (PCM)
title_sort study on the frost resistance of concrete modified with steel balls containing phase change material (pcm)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8399197/
https://www.ncbi.nlm.nih.gov/pubmed/34443020
http://dx.doi.org/10.3390/ma14164497
work_keys_str_mv AT yuanxiaosa studyonthefrostresistanceofconcretemodifiedwithsteelballscontainingphasechangematerialpcm
AT wangbaomin studyonthefrostresistanceofconcretemodifiedwithsteelballscontainingphasechangematerialpcm
AT chenpeng studyonthefrostresistanceofconcretemodifiedwithsteelballscontainingphasechangematerialpcm
AT luotao studyonthefrostresistanceofconcretemodifiedwithsteelballscontainingphasechangematerialpcm