Correlation between Crack Width and Water Flow of Cracked Mortar Specimens Measured by Constant Water Head Permeability Test

Choi, Seul-Woo; Bae, Wonho; Lee, Kwang-Myong; Shin, Kyung-Joon

doi:10.4334/jkci.2017.29.3.267

Cited by 7 publications

(7 citation statements)

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“…Another advantage of the gas diffusion experiment is that the medium has a very low viscosity compared with water. Energy loss occurs due to viscosity in a typical fluid flow [10]. In terms of the permeability experiment, as the crack width and flow rate are not linear, the higher the flow velocity is, the greater the effect on the head loss [25].…”

Section: Literature Reviewmentioning

confidence: 99%

“…Moreover, the variation of the crack width inside during the healing process cannot be measured by only observing the surface crack width. Therefore, this optical method can be used only for limited applications because the observation is limited to cracks on the outer surface [10]. Researchers have also suggested measuring the cracks by acquiring the shape of the entire specimen with the use of X-rays and computerized tomography(CT) images.…”

Section: Introductionmentioning

confidence: 99%

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Crack Width Estimation of Mortar Specimen Using Gas Diffusion Experiment

et al. 2019

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Maintenance of structures using self-healing concrete technologies has recently been actively studied. However, unlike the technological development of self-healing concrete, research focused on evaluating the self-healing performance is insufficient. Although water permeability experiments are widely used, the reliability of the test results may be reduced due to the viscosity of water and the possibility of elution of material inside the specimen. In this study, we propose a gas diffusion test for estimating the crack width and eventually for application to evaluation of the self-healing performance. The results verified that the proposed method can be effectively applied to the estimation of crack width.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Crack Width Estimation of Mortar Specimen Using Gas Diffusion Experiment

et al. 2019

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“…The cylinders were installed in an acryl mold to fix them during the water flow test. The experimental setup follows the method proposed by Choi et al [ 33 ], which is based on the work of Lepech and Li [ 34 ].…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The experimental setup follows the method proposed by Choi et al [33], which is based on the work of Lepech and Li [34].…”

Section: Materials Test Of Mortarmentioning

confidence: 99%

Effect of Clinker Binder and Aggregates on Autogenous Healing in Post-Crack Flexural Behavior of Concrete Members

et al. 2020

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Crack healing has been studied extensively to protect reinforced concrete structures from the ingress of harmful ions. Research examining the regain in the mechanical properties of self-healing composites has focused mostly on the computation of the healing ratio based on the measurement of the tensile and compressive strengths but with poor regard for the flexural performance. However, the regain in the flexural performance should also be investigated for design purposes. The present study performs flexural testing on reinforced concrete members using crushed clinker binder and aggregates as well as crystalline admixtures as healing agents. Healing ratios of 100% for crack widths smaller than 200 μm and 85% to 90% for crack widths of 250 μm were observed according to the admixing of clinker binder and aggregates. Water flow test showed that the members replacing binder by 100% of clinker achieved the best crack healing performance. The crack healing property of concrete improved to some extent the rebar yield load, the members’ ultimate load and energy absorption capacity and ductility index. The crack distribution density from the observed crack patterns confirmed the crack healing effect provided by clinker powder. The fine grain size of clinker made it possible to replace fine aggregates and longer healing time increased the crack healing effect.

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“…기존 연구에서 투수방법은 정수위 투수실험법과 변수위 투수실험법으로 구분되지만, 투수량을 고려하기 보다는 실 험환경 및 실험의 용이성을 바탕으로 연구자들의 선호에 따라 선택된 것으로 사료된다 (Choi et al, 2017 (Fig. 3).…”

Section: 투수 실험unclassified

Evaluating Strength Development and Durability of High-Strength Concrete with 60% of Ground-Granulated Blast Furnace Slag

Yuan¹,

Yang²,

Kim³

et al. 2018

J. Korean Soc. Hazard Mitig

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This experimental study investigates material properties and durability of high-strength concrete (HSC) using ground-granulated blast-furnace slag (BS) and hooked steel fiber. The test results indicated that the compressive and flexural strengths of the BS-blended concretes are higher than those of ordinary Portland cement up to 28-day aging after steam curing. The porosity decreased with the usage of the BS, and thus, the matrix became dense. Therefore, the BS-blended HSC is highly impermeable to water, regardless of whether it undergoes cracking, and some negative effects on the resistance against freezing and thawing actions. In addition, it has low resistance to carbonation despite low amounts of calcium hydroxide. However, it was confirmed that used as structural materials can be resistant to carbonation in long-term durability.

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Correlation between Crack Width and Water Flow of Cracked Mortar Specimens Measured by Constant Water Head Permeability Test

Cited by 7 publications

References 0 publications

Crack Width Estimation of Mortar Specimen Using Gas Diffusion Experiment

Crack Width Estimation of Mortar Specimen Using Gas Diffusion Experiment

Effect of Clinker Binder and Aggregates on Autogenous Healing in Post-Crack Flexural Behavior of Concrete Members

Evaluating Strength Development and Durability of High-Strength Concrete with 60% of Ground-Granulated Blast Furnace Slag

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