Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimental Investigation on the Novel Self-healing Properties of Concrete Mixed with Commercial Bacteria-Based Healing Agent and Crystalline Admixtures
https://orcid.org/http://orcid.org/0000-0001-6627-4643
https://orcid.org/http://orcid.org/0000-0001-8754-1165
https://orcid.org/http://orcid.org/0000-0003-0117-2544
Repairing the cracks in concrete structures is relatively difficult and the manual repair techniques are costly and time-consuming. To overcome this obstacle, stimulated autogenous and autonomous self-healing technologies offer a potential benefit. The healing agents are normally added in the concrete during casting. In fact, traditional concrete also has an autogenous healing ability but the self-healing effect is rather limited. In this study, self-healing concretes were made with two commercial healing agents, namely bacteria-based healing agent (BAC) and crystalline admixtures (CA). The fresh and mechanical properties of concrete were initially evaluated. The addition of healing agents increased the 28 d compressive strength of concrete by 4% for CA and 16% for BAC. The self-healing properties of concrete were evaluated by two methods: (1) crack closure measurements by means of optical microscopy and (2) water flow tests by use of the permeability setup. Results showed that the addition of healing agents showed an advanced progress of the crack closure with increasing healing time, and the permeability rate considerably decreased as a result of the crack clogging by healing products. The self-healing concretes showed better healing and sealing efficiencies than the autogenous self-healing in the traditional concrete, showing a promising result to apply the agents in real applications.
Experimental Investigation on the Novel Self-healing Properties of Concrete Mixed with Commercial Bacteria-Based Healing Agent and Crystalline Admixtures
https://orcid.org/http://orcid.org/0000-0001-6627-4643
https://orcid.org/http://orcid.org/0000-0001-8754-1165
https://orcid.org/http://orcid.org/0000-0003-0117-2544
Repairing the cracks in concrete structures is relatively difficult and the manual repair techniques are costly and time-consuming. To overcome this obstacle, stimulated autogenous and autonomous self-healing technologies offer a potential benefit. The healing agents are normally added in the concrete during casting. In fact, traditional concrete also has an autogenous healing ability but the self-healing effect is rather limited. In this study, self-healing concretes were made with two commercial healing agents, namely bacteria-based healing agent (BAC) and crystalline admixtures (CA). The fresh and mechanical properties of concrete were initially evaluated. The addition of healing agents increased the 28 d compressive strength of concrete by 4% for CA and 16% for BAC. The self-healing properties of concrete were evaluated by two methods: (1) crack closure measurements by means of optical microscopy and (2) water flow tests by use of the permeability setup. Results showed that the addition of healing agents showed an advanced progress of the crack closure with increasing healing time, and the permeability rate considerably decreased as a result of the crack clogging by healing products. The self-healing concretes showed better healing and sealing efficiencies than the autogenous self-healing in the traditional concrete, showing a promising result to apply the agents in real applications.
Experimental Investigation on the Novel Self-healing Properties of Concrete Mixed with Commercial Bacteria-Based Healing Agent and Crystalline Admixtures
https://orcid.org/http://orcid.org/0000-0001-6627-4643
https://orcid.org/http://orcid.org/0000-0001-8754-1165
https://orcid.org/http://orcid.org/0000-0003-0117-2544
Repairing the cracks in concrete structures is relatively difficult and the manual repair techniques are costly and time-consuming. To overcome this obstacle, stimulated autogenous and autonomous self-healing technologies offer a potential benefit. The healing agents are normally added in the concrete during casting. In fact, traditional concrete also has an autogenous healing ability but the self-healing effect is rather limited. In this study, self-healing concretes were made with two commercial healing agents, namely bacteria-based healing agent (BAC) and crystalline admixtures (CA). The fresh and mechanical properties of concrete were initially evaluated. The addition of healing agents increased the 28 d compressive strength of concrete by 4% for CA and 16% for BAC. The self-healing properties of concrete were evaluated by two methods: (1) crack closure measurements by means of optical microscopy and (2) water flow tests by use of the permeability setup. Results showed that the addition of healing agents showed an advanced progress of the crack closure with increasing healing time, and the permeability rate considerably decreased as a result of the crack clogging by healing products. The self-healing concretes showed better healing and sealing efficiencies than the autogenous self-healing in the traditional concrete, showing a promising result to apply the agents in real applications.
Experimental Investigation on the Novel Self-healing Properties of Concrete Mixed with Commercial Bacteria-Based Healing Agent and Crystalline Admixtures
RILEM Bookseries
Jędrzejewska, Agnieszka (Herausgeber:in) / Kanavaris, Fragkoulis (Herausgeber:in) / Azenha, Miguel (Herausgeber:in) / Benboudjema, Farid (Herausgeber:in) / Schlicke, Dirk (Herausgeber:in) / Hermawan, Harry (Autor:in) / Wiktor, Virginie (Autor:in) / Serna, Pedro (Autor:in) / Gruyaert, Elke (Autor:in)
International RILEM Conference on Synergising expertise towards sustainability and robustness of CBMs and concrete structures ; 2023 ; Milos Island, Greece
09.06.2023
12 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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