Quantification of crack-healing in novel bacteria-based self-healing concrete

Wiktor, Virginie; Jonkers, Henk M.

doi:10.1016/j.cemconcomp.2011.03.012

Cited by 856 publications

(467 citation statements)

References 27 publications

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“…Currently, construction material such as concrete is highly used because it has high compressive strength, notable fire resistance, better casting and lower expense than other construction materials. However, a major problem with the concrete is that it is vulnerable to cracking due to its relatively low tensile strength [1][2]. The cracks will reduce the capabilities of anti-permeability, anti-chloridecorrosion and anti-carbonisation greatly, which can make the corrosion of interior reinforcements much easier and can lower the carrying capacity and durability of the structure.…”

Section: Introductionmentioning

confidence: 99%

“…When a material degrades due to some damage, a special agent present within the material recovering the damage is called self-healing repair [2]. Self-healing is different from self-sealing in which the property which is recovered may vary [1][2].…”

Section: Introductionmentioning

confidence: 99%

“…Self-healing is different from self-sealing in which the property which is recovered may vary [1][2]. From the natural process, bones and trees are the best examples that recover and repair their own strength [3].…”

Section: Introductionmentioning

confidence: 99%

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Self-Healing Ability of High-Strength Fibre-Reinforced Concrete with Fly Ash and Crystalline Admixture

Reddy

Theja²,

Sashidhar

2018

CivileJournal

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The aim of this study is to analyse the self-healing capability of high-strength fibre-reinforced concrete (M70) with fly ash and crystalline admixture (CA) in four types of environmental exposures i.e. Water Immersion (WI), Wet-Dry Cycles (WD), Water contact (WC) and Air Exposure (AE). Specimens for four mixes are cast, one mix containing 1.1% of CA and three mixes with 10%, 20% and 30% partial replacement of cement with fly ash and additions of 1.1% CA. The specimens were pre-cracked at 28 days, in the range of 0.10-0.40 mm and the time set for healing was 42 days. The result shows that all the mixes have considerable amount of closing ability and strength-regaining capability for all exposure conditions. The concrete with 20% fly ash and 1.1% CA has complete crack closing ability and 100% strength-regaining capability for WI and WD cycle conditions. From SEM analysis, it is confirmed that self-healing products are CaCO3 and C-S-H gel.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Self-Healing Ability of High-Strength Fibre-Reinforced Concrete with Fly Ash and Crystalline Admixture

Reddy

Theja²,

Sashidhar

2018

CivileJournal

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“…Another approach is incorporating an expansive component in the concrete which starts to expand and fill voids and cracks when triggered by carbonation or moisture ingress (Hosoda et al 2007, Sisomphon et al 2009). Using bacteria to stimulate the self healing mechanism is an alternative but promising technique studied at different groups (Bang et al 2001, Jonkers and Schlangen 2007, De Muynck et al 2008, Wiktor and Jonkers 2011. More information on the various projects carried out at Delft University can be found on a special Blog that is created (www.selfhealingconcrete.blogspot.com).…”

Section: Introductionmentioning

confidence: 99%

Advances in Self-healing Cementitious Materials

2012

ACT

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PrefaceThis special issue is aiming at summarizing recent progress in self-healing cementitious materials and at motivating further development in the relevant research. It took a long time since the efforts to develop self-healing materials working as intelligent materials drew strong attention worldwide in the research communities. Research and development of self-healing performance have been progressing on varieties of materials including metals, non-metals, inorganic and organic materials, and composite materials. Particularly for cement-based materials, based on the background of epoch-making ideas and existing research results, it has become possible to introduce some self-healing functions and their combined mechanisms. These self-healing cementitious materials have potentials to renovate existing structural designs and maintaining schemes and contribute to service life extension and environmental impact reduction. We expect this special issue could support to realize the potential.This special issue was worked out under a strong support of JCI Technical Committee on Self-healing / Repairing Technology in Cement-based Materials (JCI TC-091) chaired by Prof. S. Igarashi, Kanazawa University. This committee's activities included 1) quantitative evaluation of self-healing performance such as water leakage control and loading damage recovery, 2) investigation into self-healing mechanism, and 3) application of non-destructive test to identify self-healing results. Committee members of the TC are listed below.Koichi Maekawa, Editor-in-Chief of ACT TC-091 committee members AbstractReinforced concrete (RC) structures in marine environments are generally affected by harsh marine environmental actions, resulting in early performance degradation mainly due to chloride-induced deterioration. In such conditions, corrosion of rebar progresses rapidly, and also the cross-sectional area of rebar is reduced and consequently structural performance of RC structures will be degraded. In contrast, the surface of concrete structures is often covered with many marine sessile organisms under marine tidal and submerged conditions. These marine sessile organisms have been empirically known to enhance the durability of concrete though the effectiveness is not appropriately evaluated. This paper describes the long-term resistance of concrete with marine sessile organisms to chloride ion penetration in concrete. The effect and its sustainability of marine sessile organisms on chloride ion penetration in concrete were investigated through field exposure tests and laboratory tests. From the test results, the basal membrane, which is a matrix of marine sessile organisms, adheres to concrete strongly on a long-term basis though some gaps between concrete and the basal membrane can be observed. In addition, experimental results and simplified simulation clarified that the attachment of marine sessile organisms can enhance the long-term resistance of concrete to chloride ion penetration.

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