An electrochemical method for accelerated chloride migration test in cement-based materials

Yang, Chih-Chyau; Cho, S.W; Jack, Miranda; Huang, Ran

doi:10.1016/s0254-0584(02)00102-5

Cited by 19 publications

(9 citation statements)

References 11 publications

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“…This is mainly caused by the theoretical transference number of chloride being smaller than the real transference number. If the regression equation is used to calculate the transference number, the experimental transference number is found to equal 0.26, which is close to the experimental result of Yang et al (2003).…”

Section: Relationship Between D Permit and D Effsupporting

confidence: 69%

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Modification of Test Process of PERMIT Ion Migration Test and its Application to Determinate Effect of Methods to Improve Chloride Penetration Resistance of Cover Concrete

Yang

Yan

2009

ACT

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A modification of the testing procedure was adopted to improve the PERMIT ion migration test method, a non-destructive method to evaluate the quality of concrete in real structures. The steady state migration test procedure was reanalyzed from the viewpoint of electrolysis. The peak current obtained in the PERMIT ion migration test correlated well with the chloride diffusivity, the theoretical relationship between these was discussed and an equation for calculating the effective chloride diffusivity in concrete from the peak current was determined. The new process was found to be quicker and more effective than the typical process of the PERMIT ion migration test and to simplify the test procedure. As an application example, the effect of different controlled permeability formworks for improving the resistance of cover concrete to the penetration of chloride ions was investigated using the modified PERMIT ion migration test.

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Section: Relationship Between D Permit and D Effsupporting

confidence: 69%

“…This means that the current of the loop, which can be seen as the speed of the electrolysis, reaches a maximum. If the volumes of both cathodic and anodic chambers are large enough, the current should be maintained, as showed by the experimental results of Yang et al (2003).…”

Section: Theoretical Analysismentioning

confidence: 99%

Modification of Test Process of PERMIT Ion Migration Test and its Application to Determinate Effect of Methods to Improve Chloride Penetration Resistance of Cover Concrete

Yang

Yan

2009

ACT

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“…Hooton and Andrade [5,6] indicated that the higher electrical potential (60 V) applied in RCPT generated the heat which may affect the flow speed. To avoid the problems mentioned, modify the test became Accelerated Chloride Migration Test (ACMT) [7].After curing, the specimen size is 100 mm diameter and 50 mm thickness for test, before vacuum water saturated, the specimens were in air dry for 1hour, then the lateral surface of specimens was coated with epoxy.After the coating layer hardened, the specimens placed in a desiccated chamber and vacuum the chamber with specimens to less 1 mmHg pressure for 3 hours. The specimens was placed between two acrylic cells in ACMT.…”

Section: Methodsmentioning

confidence: 99%

Durability Analysis Testing on Reactive Powder Concrete

Chuang

Huang

2013

AMR

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Reactive powder concrete (RPC) has been proposed as barrier materials for the construction of engineered barrier in Taiwan. The durability characteristics of RPC in such applications become paramount for the success of the containment of the wastes. The adverse environmental conditions at the disposal site could attack concrete barrier and results in degradation of the material.Laboratory tests will be conducted on RPC with various compositions to investigate the durability test of RPC. These include chloride ion ingress, and sulfate attack of RPC. In this study, the resistance of concrete to sulfate attack was tested by submerging RPC specimens in Na2SO4 solution. Based on the volume change data for a period of1 year, the RPC with higher water to binder ratio (W/B) exhibited lower resistance to sulfate attack. The electrochemical technique is applied to accelerate chloride-ion migration test for RPC. The RPCs chloride migration coefficient is significantly decreased by the use of pozzolanic material, compared with ordinary concrete.

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“…So far, the use of mineral admixtures such as fly ash, silica fume, slag, and metakaolin have been found to be able to enhance concrete durability, [97][98][99] by increasing chloride binding 100 , decreasing chloride permeability, 99,101 elevating threshold chloride content 102 , and improving the distribution of pore size and shape of concrete matrix. [103][104][105] Even though, the mineral admixtures have been used in MOC, the corrosion behavior have rarely been studied. To apply MOC in steel-reinforced components, much more research needs to be developed in the future.…”

Section: Modification Of Moc For Corrosion On Reinforcement In Mocmentioning

confidence: 99%

Recent development in magnesium oxychloride cement

Guo

Zhang

Soe³

et al. 2018

Structural Concrete

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This paper presents a review for the key literatures on magnesium oxychloride cement (MOC) to establish a comprehensive and insightful understanding of MOC. The main aim of this review is to identify the most common problems in the development and application of the MOC and the various methods to solve these problems. The characteristics of MOC including composition of hydration phases, strength development, and durability are reviewed. In particular, the various factors influencing the water resistance of MOC, the most critical characteristics of MOC, such as the reactivity of magnesium oxide, additives, and curing conditions are reviewed. Finally, the methods to improve water resistance and its related issues of MOC from the literature are summarized and future research is proposed.

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An electrochemical method for accelerated chloride migration test in cement-based materials

Cited by 19 publications

References 11 publications

Modification of Test Process of PERMIT Ion Migration Test and its Application to Determinate Effect of Methods to Improve Chloride Penetration Resistance of Cover Concrete

Modification of Test Process of PERMIT Ion Migration Test and its Application to Determinate Effect of Methods to Improve Chloride Penetration Resistance of Cover Concrete

Durability Analysis Testing on Reactive Powder Concrete

Recent development in magnesium oxychloride cement

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