Cargando…

Research on Fatigue–Healing Performance of Asphalt Mixture Based on the Semicircular Bending Test

In order to study the self-healing performance of macroscopic fractures of asphalt mixtures, semicircular bending (SCB) tests were used to test 90# base asphalt mixtures, SBS (Styrene–Butadiene–Styrene) modified asphalt mixtures, and SBS + CR (Chloroprene Rubber) composite modified asphalt mixtures....

Descripción completa

Detalles Bibliográficos
Autores principales: Wang, Lijun, Cheng, Peifeng, Zhao, Qiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10573486/
https://www.ncbi.nlm.nih.gov/pubmed/37834522
http://dx.doi.org/10.3390/ma16196382
_version_ 1785120475157889024
author Wang, Lijun
Cheng, Peifeng
Zhao, Qiang
author_facet Wang, Lijun
Cheng, Peifeng
Zhao, Qiang
author_sort Wang, Lijun
collection PubMed
description In order to study the self-healing performance of macroscopic fractures of asphalt mixtures, semicircular bending (SCB) tests were used to test 90# base asphalt mixtures, SBS (Styrene–Butadiene–Styrene) modified asphalt mixtures, and SBS + CR (Chloroprene Rubber) composite modified asphalt mixtures. The F-H-F (the asphalt mixture specimen was fatigued for a certain number of times, then healed under certain conditions, and then fatigued until destroyed) test was carried out, and the fatigue life recovery rate of the fatigue test before and after healing was defined as the healing index (HI). The gray correlation analysis method was used to judge the influence degree of influencing factors on fatigue–healing according to the correlation index. The results show the type of asphalt has the most significant influence on the healing ability of the asphalt mixture. In the case of complete healing, the fatigue–healing performance of the SBS + CR composite modified asphalt mixture was the best, followed by the SBS-modified asphalt mixture, and 90# base asphalt. When the healing temperature is close to the softening point of asphalt, the healing performance of 90# base asphalt is better when the healing temperature is low. When the healing time is longer, the healing performance is better, and there is an optimal healing time. The healing index decreased with the increase in the degree of damage. When the degree of damage is too large, the asphalt mixture will be difficult to heal.
format Online
Article
Text
id pubmed-10573486
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-105734862023-10-14 Research on Fatigue–Healing Performance of Asphalt Mixture Based on the Semicircular Bending Test Wang, Lijun Cheng, Peifeng Zhao, Qiang Materials (Basel) Article In order to study the self-healing performance of macroscopic fractures of asphalt mixtures, semicircular bending (SCB) tests were used to test 90# base asphalt mixtures, SBS (Styrene–Butadiene–Styrene) modified asphalt mixtures, and SBS + CR (Chloroprene Rubber) composite modified asphalt mixtures. The F-H-F (the asphalt mixture specimen was fatigued for a certain number of times, then healed under certain conditions, and then fatigued until destroyed) test was carried out, and the fatigue life recovery rate of the fatigue test before and after healing was defined as the healing index (HI). The gray correlation analysis method was used to judge the influence degree of influencing factors on fatigue–healing according to the correlation index. The results show the type of asphalt has the most significant influence on the healing ability of the asphalt mixture. In the case of complete healing, the fatigue–healing performance of the SBS + CR composite modified asphalt mixture was the best, followed by the SBS-modified asphalt mixture, and 90# base asphalt. When the healing temperature is close to the softening point of asphalt, the healing performance of 90# base asphalt is better when the healing temperature is low. When the healing time is longer, the healing performance is better, and there is an optimal healing time. The healing index decreased with the increase in the degree of damage. When the degree of damage is too large, the asphalt mixture will be difficult to heal. MDPI 2023-09-24 /pmc/articles/PMC10573486/ /pubmed/37834522 http://dx.doi.org/10.3390/ma16196382 Text en © 2023 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
Wang, Lijun
Cheng, Peifeng
Zhao, Qiang
Research on Fatigue–Healing Performance of Asphalt Mixture Based on the Semicircular Bending Test
title Research on Fatigue–Healing Performance of Asphalt Mixture Based on the Semicircular Bending Test
title_full Research on Fatigue–Healing Performance of Asphalt Mixture Based on the Semicircular Bending Test
title_fullStr Research on Fatigue–Healing Performance of Asphalt Mixture Based on the Semicircular Bending Test
title_full_unstemmed Research on Fatigue–Healing Performance of Asphalt Mixture Based on the Semicircular Bending Test
title_short Research on Fatigue–Healing Performance of Asphalt Mixture Based on the Semicircular Bending Test
title_sort research on fatigue–healing performance of asphalt mixture based on the semicircular bending test
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10573486/
https://www.ncbi.nlm.nih.gov/pubmed/37834522
http://dx.doi.org/10.3390/ma16196382
work_keys_str_mv AT wanglijun researchonfatiguehealingperformanceofasphaltmixturebasedonthesemicircularbendingtest
AT chengpeifeng researchonfatiguehealingperformanceofasphaltmixturebasedonthesemicircularbendingtest
AT zhaoqiang researchonfatiguehealingperformanceofasphaltmixturebasedonthesemicircularbendingtest