Chloride penetration in cracked mortar and the influence of autogenous crack healing

Maes, Mathias; Snoeck, Didier; Belie, Nele De

doi:10.1016/j.conbuildmat.2016.03.180

Cited by 92 publications

(41 citation statements)

References 28 publications

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“…To assess self‐healing efficiency, the transport properties and mechanical responses of cementitious materials are often measured . The improvement in transport properties, specifically in liquid tightness, is primarily used for quantifying the healing efficiency as it is widely accepted as the major promoting factor for improved durability of cementitious materials . Comparatively, the improvement in mechanical properties has been less reported when considering the intrinsic healing …”

Section: Regained Properties and Assessment Of Healing Efficiencymentioning

confidence: 99%

“…The crack closure ratio determined by chloride penetration was approximately 80% for crack widths up to 105 µm after the autogenous healing. This crack closure amount is quite beneficial to reinforced concrete since 10–55 µm was suggested as the minimum threshold of crack width for chloride penetration . For autonomous healing, up to a 90% crack closure ratio was generated as characterized by the decreasing water permeability …”

Section: Regained Properties and Assessment Of Healing Efficiencymentioning

confidence: 99%

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Recent Advances in Intrinsic Self‐Healing Cementitious Materials

et al. 2018

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Self-healing is a natural phenomenon whereby living organisms respond to damage. Recently, considerable research efforts have been invested in self-healing cementitious materials that are capable of restoring structural integrity and mechanical properties after being damaged. Inspired by nature, a variety of creative approaches are explored here based on the intrinsic or extrinsic healing mechanism. Research on new intrinsic self-healing cementitious materials with biomimetic features is on the forefront of material science, which provides a promising way to construct resilient and sustainable concrete infrastructures. Here, the current advances in the development of the intrinsic healing cementitious materials are described, and a new definition of intrinsic self-healing discussed. The methods to assess the efficiency of different healing mechanisms are briefly summarized. The critical insights are emphasized to guide the future research on the development of new self-healing cementitious materials.

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Section: Regained Properties and Assessment Of Healing Efficiencymentioning

confidence: 99%

Section: Regained Properties and Assessment Of Healing Efficiencymentioning

confidence: 99%

Recent Advances in Intrinsic Self‐Healing Cementitious Materials

et al. 2018

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“…When bacteria are used to heal cracks in cementitious materials, the crystal growth and crack width reduction can be monitored in time by using microscopic analysis . Also when crystalline admixtures, expansive agents, autogenous healing, promoted and stimulated autogenous healing with SAPs, microcapsules with bacteria and other healing agents, the combination of bacteria and SAPs, and sodium‐silicate saturated lightweight aggregates are studied, microscopic analysis can be used.…”

Section: Healing Efficiencymentioning

confidence: 99%

Validation of Self‐Healing Properties of Construction Materials through Nondestructive and Minimal Invasive Testing

Snoeck

Malm

Cnudde

et al. 2018

Adv Materials Inter

Self Cite

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When studying the self‐healing properties of construction materials, a plethora of destructive and nondestructive testing (NDT) techniques can be used. In this review, the applicability of different nondestructive test methods is discussed in detail. The methods can be categorized whether they are used to study the encapsulation and/or protection mechanism of the healing agent, the sequestered healing agent itself, the distribution of healing agents, the trigger mechanism for healing, the healing efficiency, or healing performance. Based on this categorization, nondestructive techniques found in literature are discussed. In this way, a robust understanding of the different techniques can be used for future research on self‐healing construction materials.

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“…With the fast development of construction in civil engineering nowadays, reinforced concrete structures are being built all over the world, in which marine concrete structures occupy a significant position due to the applications of marine resources playing an increasingly important role in the national economy [1][2][3][4]. The properties of concrete materials in marine environments are affected by chloride salt and sulfate attack, microbial corrosion, as well as the permeability and diffusivity of concrete materials [5][6][7]. This has drawn great attention from researchers.…”

Section: Introductionmentioning

confidence: 99%

Protective Mechanism of Silane on Concrete upon Marine Exposure

Zhang

Liu

et al. 2019

Coatings

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Due to the high chloride ion concentration in marine environments, chloride ions can penetrate into concrete, along with the transportation of water molecules, and thus, cause rebar corrosion. This is an important reason for the decrease in the concrete durability. In this paper, by means of the sol–gel synthesis method, a silane emulsion, a silane compound emulsion, and silane compound gel were prepared by using isobutyl triethoxysilane and ethyl orthosilicate (TEOS) as the main raw materials. These silane materials were coated on a concrete surface and then placed in the marine exposure sites of Wheat Island, in Qingdao, for one year. The results show that these silane materials can effectively inhibit the chloride ions transporting in concrete. Upon the increase of the exposure time, the protection ability of the silane emulsion declined gradually, while the silane compound emulsion had stable protective effects. In comparison with the permeability coefficient of chloride ions in the blank test block, the permeability coefficient of chloride ions in the test block coated with the silane emulsion, the composition of silane emulsion, and silane compound gel fell off around 20%, 30%, and 50%, respectively. The test results indicate that the three kinds of protective materials have good inhibition abilities against chloride ion transportation, on which the compound gel had the best effect.

show abstract

Chloride penetration in cracked mortar and the influence of autogenous crack healing

Cited by 92 publications

References 28 publications

Recent Advances in Intrinsic Self‐Healing Cementitious Materials

Recent Advances in Intrinsic Self‐Healing Cementitious Materials

Validation of Self‐Healing Properties of Construction Materials through Nondestructive and Minimal Invasive Testing

Protective Mechanism of Silane on Concrete upon Marine Exposure

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