Mechanical and Self-Healing Performances of Crumb Rubber Modified High-Strength Engineered Cementitious Composites
High-strength engineered cementitious composite (HS-ECC) reinforced with polyethylene (PE) fiber characterizes wider crack widths than the conventional polyvinyl alcohol fiber-reinforced ECC (PVA-ECC), weakening the self-healing potential of HS-ECC. The properties of HS-ECC are tailored by introduci...
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Frontiers Media S.A.
2021-12-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2021.811110/full |
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| author | Yu Jiangtao Yu Jiangtao Jiang Fangming Xing Qiong Yang Qi Li Mi |
| author_facet | Yu Jiangtao Yu Jiangtao Jiang Fangming Xing Qiong Yang Qi Li Mi |
| author_sort | Yu Jiangtao |
| collection | DOAJ |
| description | High-strength engineered cementitious composite (HS-ECC) reinforced with polyethylene (PE) fiber characterizes wider crack widths than the conventional polyvinyl alcohol fiber-reinforced ECC (PVA-ECC), weakening the self-healing potential of HS-ECC. The properties of HS-ECC are tailored by introducing crumb rubber (CR), as artificial flaws can lower the matrix toughness and the crack width, leading to an enhanced self-healing potential of HS-ECC. In this study, CR is used to entirely replace silica sand (SS) with three equivalent aggregate-to-binder ratios of 0.2, 0.4, and 0.6, and two CR particle sizes (i.e., CR1 and CR2) are also considered to investigate the effects on density, compressive properties, and tensile performances of HS-ECC. Although CR substitution of SS influences adversely the mechanical strengths of HS-ECC, it can reduce the HS-ECC matrix fracture toughness, activate more microcracks, and reduce the crack width. Moreover, CR-modified HS-ECC specimens featuring the smallest crack width were preloaded to three specific strain levels, including 0.5%, 1.0%, and 2.0%, and then experienced wet–dry conditioning to exhibit effective mechanical and non-mechanical property recovery. The further hydration of binder materials enhances the interfacial bond stress and thus retains the mechanical performances of self-healed HS-ECC, which is expected to improve the practical application and benefit the sustainability of HS-ECC. |
| first_indexed | 2024-12-13T18:57:36Z |
| format | Article |
| id | doaj.art-7ee6a45f7d39445ab0108c203d88a40e |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-12-13T18:57:36Z |
| publishDate | 2021-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-7ee6a45f7d39445ab0108c203d88a40e2022-12-21T23:34:46ZengFrontiers Media S.A.Frontiers in Materials2296-80162021-12-01810.3389/fmats.2021.811110811110Mechanical and Self-Healing Performances of Crumb Rubber Modified High-Strength Engineered Cementitious CompositesYu Jiangtao0Yu Jiangtao1Jiang Fangming2Xing Qiong3Yang Qi4Li Mi5School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, ChinaCollege of Civil Engineering, Tongji University, Shanghai, ChinaCollege of Civil Engineering, Tongji University, Shanghai, ChinaSchool of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, ChinaQinghai Transportation Planning and Design Research Institute Co., Ltd., Xining, ChinaShanghai Tiangu Housing Inspection Company, Ltd., Shanghai, ChinaHigh-strength engineered cementitious composite (HS-ECC) reinforced with polyethylene (PE) fiber characterizes wider crack widths than the conventional polyvinyl alcohol fiber-reinforced ECC (PVA-ECC), weakening the self-healing potential of HS-ECC. The properties of HS-ECC are tailored by introducing crumb rubber (CR), as artificial flaws can lower the matrix toughness and the crack width, leading to an enhanced self-healing potential of HS-ECC. In this study, CR is used to entirely replace silica sand (SS) with three equivalent aggregate-to-binder ratios of 0.2, 0.4, and 0.6, and two CR particle sizes (i.e., CR1 and CR2) are also considered to investigate the effects on density, compressive properties, and tensile performances of HS-ECC. Although CR substitution of SS influences adversely the mechanical strengths of HS-ECC, it can reduce the HS-ECC matrix fracture toughness, activate more microcracks, and reduce the crack width. Moreover, CR-modified HS-ECC specimens featuring the smallest crack width were preloaded to three specific strain levels, including 0.5%, 1.0%, and 2.0%, and then experienced wet–dry conditioning to exhibit effective mechanical and non-mechanical property recovery. The further hydration of binder materials enhances the interfacial bond stress and thus retains the mechanical performances of self-healed HS-ECC, which is expected to improve the practical application and benefit the sustainability of HS-ECC.https://www.frontiersin.org/articles/10.3389/fmats.2021.811110/fullhigh-strength engineered cementitious compositelightweightcrumb rubberself-healingtensile propertiessustainability |
| spellingShingle | Yu Jiangtao Yu Jiangtao Jiang Fangming Xing Qiong Yang Qi Li Mi Mechanical and Self-Healing Performances of Crumb Rubber Modified High-Strength Engineered Cementitious Composites Frontiers in Materials high-strength engineered cementitious composite lightweight crumb rubber self-healing tensile properties sustainability |
| title | Mechanical and Self-Healing Performances of Crumb Rubber Modified High-Strength Engineered Cementitious Composites |
| title_full | Mechanical and Self-Healing Performances of Crumb Rubber Modified High-Strength Engineered Cementitious Composites |
| title_fullStr | Mechanical and Self-Healing Performances of Crumb Rubber Modified High-Strength Engineered Cementitious Composites |
| title_full_unstemmed | Mechanical and Self-Healing Performances of Crumb Rubber Modified High-Strength Engineered Cementitious Composites |
| title_short | Mechanical and Self-Healing Performances of Crumb Rubber Modified High-Strength Engineered Cementitious Composites |
| title_sort | mechanical and self healing performances of crumb rubber modified high strength engineered cementitious composites |
| topic | high-strength engineered cementitious composite lightweight crumb rubber self-healing tensile properties sustainability |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2021.811110/full |
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