Feasibility and Compatibility of a Biomass Capsule System in Self-Healing Concrete
Cracking can facilitate deteriorations of concrete structures via various mechanisms by providing ingress pathways for moisture and aggressive chemicals. In contrast to conventional maintenance methods, self-healing is a promising strategy for achieving automatic crack repair without human intervent...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/4/958 |
| _version_ | 1797396205570883584 |
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| author | Arkabrata Sinha Qi Wang Jianqiang Wei |
| author_facet | Arkabrata Sinha Qi Wang Jianqiang Wei |
| author_sort | Arkabrata Sinha |
| collection | DOAJ |
| description | Cracking can facilitate deteriorations of concrete structures via various mechanisms by providing ingress pathways for moisture and aggressive chemicals. In contrast to conventional maintenance methods, self-healing is a promising strategy for achieving automatic crack repair without human intervention. However, in capsule-based self-healing concrete, the dilemma between capsules’ survivability and crack healing efficiency is still an unfathomed challenge. In this study, the feasibility of a novel property-switchable capsule system based on a sustainable biomass component, polylactic acid, is investigated. Capsules with different geometries and dimensions were studied focusing on the compatibility with concrete, including survivability during concrete mixing, influence on mortar and concrete properties, and property evolution of the capsules. The results indicate that the developed elliptical capsules can survive regular concrete mixing with a survival ratio of 95%. In concrete containing 5 vol.% of gravel-level capsules, the compressive strength was decreased by 13.5% after 90 days, while the tensile strength was increased by 4.8%. The incorporation of 2 vol.% of sand-level capsules did not impact the mortar strength. Degradation and switchable properties triggered by the alkaline matrix of cement were observed, revealing the potential of this novel biomass capsule system in achieving both high survivability and self-healing efficiency in concrete. |
| first_indexed | 2024-03-09T00:46:58Z |
| format | Article |
| id | doaj.art-c8d4753f8fb44d47b338e4bb226fb37b |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T00:46:58Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-c8d4753f8fb44d47b338e4bb226fb37b2023-12-11T17:28:18ZengMDPI AGMaterials1996-19442021-02-0114495810.3390/ma14040958Feasibility and Compatibility of a Biomass Capsule System in Self-Healing ConcreteArkabrata Sinha0Qi Wang1Jianqiang Wei2Department of Civil and Environmental Engineering, Francis College of Engineering, University of Massachusetts Lowell, Lowell, MA 01854, USADepartment of Civil and Environmental Engineering, Francis College of Engineering, University of Massachusetts Lowell, Lowell, MA 01854, USADepartment of Civil and Environmental Engineering, Francis College of Engineering, University of Massachusetts Lowell, Lowell, MA 01854, USACracking can facilitate deteriorations of concrete structures via various mechanisms by providing ingress pathways for moisture and aggressive chemicals. In contrast to conventional maintenance methods, self-healing is a promising strategy for achieving automatic crack repair without human intervention. However, in capsule-based self-healing concrete, the dilemma between capsules’ survivability and crack healing efficiency is still an unfathomed challenge. In this study, the feasibility of a novel property-switchable capsule system based on a sustainable biomass component, polylactic acid, is investigated. Capsules with different geometries and dimensions were studied focusing on the compatibility with concrete, including survivability during concrete mixing, influence on mortar and concrete properties, and property evolution of the capsules. The results indicate that the developed elliptical capsules can survive regular concrete mixing with a survival ratio of 95%. In concrete containing 5 vol.% of gravel-level capsules, the compressive strength was decreased by 13.5% after 90 days, while the tensile strength was increased by 4.8%. The incorporation of 2 vol.% of sand-level capsules did not impact the mortar strength. Degradation and switchable properties triggered by the alkaline matrix of cement were observed, revealing the potential of this novel biomass capsule system in achieving both high survivability and self-healing efficiency in concrete.https://www.mdpi.com/1996-1944/14/4/958biomasspolylactic acidcapsuleself-healing concretedegradationcompatibility |
| spellingShingle | Arkabrata Sinha Qi Wang Jianqiang Wei Feasibility and Compatibility of a Biomass Capsule System in Self-Healing Concrete Materials biomass polylactic acid capsule self-healing concrete degradation compatibility |
| title | Feasibility and Compatibility of a Biomass Capsule System in Self-Healing Concrete |
| title_full | Feasibility and Compatibility of a Biomass Capsule System in Self-Healing Concrete |
| title_fullStr | Feasibility and Compatibility of a Biomass Capsule System in Self-Healing Concrete |
| title_full_unstemmed | Feasibility and Compatibility of a Biomass Capsule System in Self-Healing Concrete |
| title_short | Feasibility and Compatibility of a Biomass Capsule System in Self-Healing Concrete |
| title_sort | feasibility and compatibility of a biomass capsule system in self healing concrete |
| topic | biomass polylactic acid capsule self-healing concrete degradation compatibility |
| url | https://www.mdpi.com/1996-1944/14/4/958 |
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