Development of Self-Healing System for Concrete with Selective Heating around Crack

Nishiwaki, Tomoya; Mihashi, Hirozo; Jang, Byung Koog; Miura, Kazuaki

doi:10.3151/jact.4.267

Cited by 103 publications

(49 citation statements)

References 5 publications

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“…The adhesive is thereby intended to be released into the crack plane, cure, and thus heal the original crack through bonding of the crack faces. This concept has also been explored by other authors including Li et al (1998), Mihashi et al (2000) and more recently by Nishiwaki et al (2006).…”

Section: Introductionmentioning

confidence: 87%

Experimental investigation of adhesive-based self-healing of cementitious materials

Joseph

Jefferson

Isaacs

et al. 2010

Magazine of Concrete Research

181

109

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This paper presents the results of a series of self-healing experiments conducted on reinforced mortar beams containing adhesive-filled glass reservoirs. An overview of the findings of the preliminary investigation stage of experiments is given in addition to the results of a parametric study which investigates the effect of the level of reinforcement and loading rate on the amount of self-healing. Results show that both primary and secondary healing occurs during the first and second loading cycles respectively. Qualitative results also show clear evidence of the occurrence of crack-healing following the first loading cycle and new crack formation during the second loading cycle. The long-term motivation for this work is to provide data suitable for the development of a numerical material model for the autonomic healing process in cementitious materials.

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Section: Introductionmentioning

confidence: 87%

Experimental investigation of adhesive-based self-healing of cementitious materials

Joseph

Jefferson

Isaacs

et al. 2010

Magazine of Concrete Research

181

109

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show abstract

“…Moreover, too much energy would be required to activate the system if the whole structure needs to be heated. Nishiwaki et al (2006a) developed a new approach to achieve a self-repairing function in a totally different way from the previous technologies including passive ones. That approach could be called an "active self-repairing system."…”

Section: Active Self-repairingmentioning

confidence: 99%

Development of Engineered Self-Healing and Self-Repairing Concrete-State-of-the-Art Report

Mihashi

Nishiwaki

2012

ACT

Self Cite

165

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Challenging studies of engineered self-healing and self-repairing functions in concrete structures are briefly reviewed. While self-healing of concrete has been studied for a long time, it was only recently noticed that some engineered technologies are useful to stimulate the potential of concrete to be self-healed. For example, fiber reinforced cementitious composites (FRCC) have a much higher potential of self-healing than ordinary concrete because of their capability to keep cracks thinner and also because of the bridging network system in cracks; a specific bio-chemical approach, i.e. the application of mineral-precipitating bacteria, is now available; and various mineral admixtures are useful for practical application. Furthermore, the new concept of self-repairing concrete, which is based on the design concept of intelligent materials, is reported. Self-repairing concrete is concrete that incorporates devices for achieving the three key functions of an intelligent material, (1) sensing, (2) processing, and (3) actuating. This paper is a state-of-the-art report on the recent development of engineered self-healing and self-repairing concrete.

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“…Professor dry, the pioneer in the study of bio-mimetic self-healing smart concrete, started to research the passive self-repair technology in early 1990s [1] . In the past 20 years, researchers have conducted a large number of experiments to investigate the applicable repair agent [2][3][4][5][6][7] , methods of encapsulation [8,9] , the optimal size/content of hollow glass fi ber or capsule [10][11][12] , the modes of actuation to release the encapsulated chemicals into concrete cracks [1,13] , and the repair mechanism [12,14] . For example, Ou et al [12] utilized α-cyanacrylate encapsulated in hollow glass fibers.…”

Section: Introductionmentioning

confidence: 99%

The crack self-healing properties of cement-based material with EVA heat-melt adhesive

Yuan

Sun

Zuo

et al. 2011

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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An experimental program was carried out to investigate whether EVA (ethylene vinyl acetate copolymer) heat-melt adhesive can potentially act as a self-healing agent in cement-based material. The effects of incorporation of EVA and heating on the properties of mortar were studied. Self-healing capacity of EVA specimens was also verifi ed. The experimental results show that the addition of EVA would not greatly affect original characteristics of the matrix when EVA content was less than 5%; the interface between EVA and cement matrix was well improved after heating, which allows a signifi cant improvement in fl exural strength and toughness of specimen; pre-damaged specimens in various degrees (30%, 50% and 70%) were effectively repaired by EVA and the repair effi ciency all exceeded 100%.

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Development of Self-Healing System for Concrete with Selective Heating around Crack

Cited by 103 publications

References 5 publications

Experimental investigation of adhesive-based self-healing of cementitious materials

Experimental investigation of adhesive-based self-healing of cementitious materials

Development of Engineered Self-Healing and Self-Repairing Concrete-State-of-the-Art Report

The crack self-healing properties of cement-based material with EVA heat-melt adhesive

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