Influence of Coatings on Bar-Concrete Bond

Castro, Protásio Ferreira e

doi:10.1061/(asce)0899-1561(1996)8:4(212)

Cited by 7 publications

(7 citation statements)

References 7 publications

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“…Based on the results of using an anticorrosion coating in OPCC, coating technology is a practical way to alleviate rebar corrosion in harsh environments. [29][30][31] However, the feasibility of coating technology in solving steel corrosion in MOCC remains to be verified. Therefore, one of the highlights of this paper is that it provided favorable support for its feasibility in quantitative analysis.…”

Section: Discussionmentioning

confidence: 99%

“…The coating can provide protection to the rebar in four aspects: barrier protection, electrochemical action, passivation action and self-repairing action. [29][30][31]…”

Section: Rebar Fabricationmentioning

confidence: 99%

“…To validate the accuracy of the time-dependent model for reinforcement corrosion in MOCC and life prediction, the relative dynamic elastic modulus of MOCC with and without ER under different conditions was tested at 0, 6,12,18,24,30,36,42,48,54, and 60 days, respectively.…”

Section: Relative Dynamic Elasticity Modulus Testmentioning

confidence: 99%

“…Based on the use of an anticorrosion coating for OPCC, coating technology was found to be a practical way to alleviate rebar corrosion. [29][30][31] This paper presents a study on the reinforcement corrosion in MOCC in which the practicality of coated rebar in MOCC was investigated. In addition, reinforced concrete based on ordinary Portland cement is unserviceable in a salt lake environment after more than 3-5 years.…”

Section: Introductionmentioning

confidence: 99%

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Time‐dependent model and life prediction for reinforcement corrosion in magnesium oxychloride cement concrete

Gong

Wang

Zhang

et al. 2020

Structural Concrete

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An effective approach to make better use of the salt-brine resistance of magnesium oxychloride cement concrete (MOCC) and reduce "magnesium damage" (the concentrate of magnesium resources) that destroys the ecological balance in salt lake areas is to apply MOCC widely. However, the first problem is the high chloride ion content in MOCC, which corrodes reinforcement easily. Concrete cover depth, the experimental environment, and surface treatment of rebar were considered factors study in reinforcement corrosion in MOCC. Based on the tests conducted, a time-dependent model for reinforcement corrosion in MOCC was proposed, and its life time (initial corrosion and initial cracking time) was calculated and verified in tests. The results showed that proper coating could inhibit reinforcement corrosion and increase the service life of rebar significantly. Further, the salt lake environment had little influence on reinforcement corrosion in MOCC. For exposed rebar in MOCC, the larger the concrete cover depth, the more serious the reinforcement corrosion, while, for coated rebar, the converse was true. All cases of reinforcement corrosion in MOCC conformed to the logarithmic-type time-dependent model before concrete cracking. Accordingly, reinforcement corrosion in MOCC and the excess of magnesium resources are expected to be solved.

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Section: Discussionmentioning

confidence: 99%

“…The coating can provide protection to the rebar in four aspects: barrier protection, electrochemical action, passivation action and self-repairing action. [29][30][31]…”

Section: Rebar Fabricationmentioning

confidence: 99%

Section: Relative Dynamic Elasticity Modulus Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Time‐dependent model and life prediction for reinforcement corrosion in magnesium oxychloride cement concrete

Gong

Wang

Zhang

et al. 2020

Structural Concrete

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“…It is known that cast-in-place structures are structurally stronger than postinstalled systems. Castro (1996) studied the influence of coatings on bar-concrete bond. By using strut tests, he demonstrated that the bond strength of an epoxy-coated rebar system is 8.6% weaker than a cast-in-place bar-concrete system.…”

Section: Introductionmentioning

confidence: 99%

Elastoplastic Damaging Model for Adhesive Anchor Systems. I: Theoretical Formulation and Numerical Implementation

2011

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In this and in the companion paper, the mechanical response of adhesive anchor systems is theoretically and numerically predicted and experimentally observed. The theoretical prediction is on the basis of an elastoplastic damaging model formulated to predict the structural response associated with the development of a fracture in adhesive anchor systems. This part describes the analytical model developed in the framework of a thermodynamically consistent theory, which assumes adhesion where the structure is sound, and friction in correspondence with the fracture. Isotropic damage is considered. The model can predict the structural behavior at the interface between two surfaces of ductile, brittle, or quasi-brittle materials. The Helmholtz free energy is written to model the materials' hardening or softening. Isotropic damage is considered, and the possible effects of dilatancy are taken into account, including nonassociative flow rules. The formulation is implemented into the finite-element code FEAP. In the companion paper, the new model is adopted to predict the mechanical response to the pullout force of postinstalled rebar chemically bonded in concrete. The analytical model and the numerical implementation are experimentally validated by several pullout tests, which are monitored by using an acoustic-emission technique

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Experimental and analytical study on bond strength of normal uncoated and epoxy-coated reinforcing bars

Wang

Chen

Tang

2018

Construction and Building Materials

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Influence of Coatings on Bar-Concrete Bond

Cited by 7 publications

References 7 publications

Time‐dependent model and life prediction for reinforcement corrosion in magnesium oxychloride cement concrete

Time‐dependent model and life prediction for reinforcement corrosion in magnesium oxychloride cement concrete

Elastoplastic Damaging Model for Adhesive Anchor Systems. I: Theoretical Formulation and Numerical Implementation

Experimental and analytical study on bond strength of normal uncoated and epoxy-coated reinforcing bars

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