Coatings and overlays for concrete affected by alkali-silica reaction

Giannini, Eric R.; Bentivegna, Anthony F.; Folliard, Kevin J.

doi:10.1201/b11585-116

Cited by 6 publications

(4 citation statements)

References 1 publication

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“…The influence of cracking on the elastic modulus of the specimens reached a maximum, and the linear IE frequency was no longer sensitive to further damage development. This result is consistent with previous findings for resonance frequency testing on ASR damaged concrete prisms by Malone et al [21], Rivard and Saint-Pierre [22], and Giannini et al [23]. A study of monitoring the relative ultrasonic velocity change in the same group of specimens by Sun et al [24] also indicated saturation at a velocity drop of 20%.…”

Section: Linear Impact-echo Resultssupporting

confidence: 91%

Nonlinear Impact-Echo Test for Quantitative Evaluation of ASR Damage in Concrete

Malone,

Sun,

Zhu

2023

J Nondestruct Eval

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Nonlinear acoustic methods demonstrate high sensitivity for concrete damage evaluation. Among these methods, nonlinear resonance acoustic methods have been widely used in laboratory tests on small scale test samples. In this study, a nonlinear impact-echo (IE) method was proposed for concrete damage evaluation, in which the IE frequency shift was measured at different impact force levels. The nonlinear IE test is similar to the nonlinear impact resonance acoustic spectroscopy (NIRAS) test in the experimental setup and analysis method. However, the nonlinear IE test excites a local thickness resonance mode of a member instead of the global resonance vibration. Therefore, the analyzed mode is not affected by boundary conditions and can be applied to large concrete structural members. To identify the fundamental IE frequency, multiple impacts at different locations were used. The nonlinear IE method was then validated on seven concrete beam specimens with different levels of alkali-silica reaction (ASR) damage. The nonlinear IE test results demonstrate high sensitivity to concrete damage and allow for quantitative assessment of the damage state of concrete without a baseline measurement.

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Section: Linear Impact-echo Resultssupporting

confidence: 91%

Nonlinear Impact-Echo Test for Quantitative Evaluation of ASR Damage in Concrete

Malone,

Sun,

Zhu

2023

J Nondestruct Eval

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“…They reported that overlay solution was advantageous in rapid and convenient traffic operation. In addition, there have been many studies on what to do when ASR occurs (Giannini et al, 2011;Harrington, 2014).…”

Section: Durability Crackmentioning

confidence: 99%

Development of Distress Progress Model for Determining the Appropriate Time for Overlaying Durability Cracks in Concrete Pavement

Suh

Lee

2021

KSCE J Civ Eng

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“…By controlling the humidity level inside concrete, coatings may mitigate ASR and DEF by acting as a barrier against ingress of water and allowing the drying of concrete, as long as they have adequate characteristics of water permeability. The control of water ingress in the concrete by the use of coatings is reported in the literature as a preventive and remedial measure to mitigate ASR and DEF [7][8][9]. However, there is a wide range of coating products available in the market, with very different properties, which may or may not make them suitable to mitigate the abovementioned phenomena; thus, appropriate selection of a coating system, considering factors like barrier properties, is critical to ensure that it will effectively mitigate the reactions in a structure.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of a coating protection system for concrete structures affected by internal expansive reactions

et al. 2022

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In the last decades, a significant number of large concrete structures with deterioration problems, related to internal expansive chemical reactions, have been detected in Portugal. This type of degradation is associated with the formation of expansive products in concrete causing its disruption, leading to the decrease of the structure’s service life and, ultimately, to the decommissioning or demolition of the structure. In Portugal, structures affected by this pathology are very important in economic and strategic terms, since these reactions are usually encountered in large dams, bridges and viaducts. Two separate material-based mechanisms have been identified to cause the concrete swelling: Alkali-Silica Reaction (ASR) and Delayed Ettringite Formation (DEF). Both reactions result in the formation of expansive products and a common requirement for their occurrence is the presence of a sufficient moisture content inside concrete. By controlling the humidity level in concrete, coatings applied onto the concrete surface should contribute to mitigate ASR or DEF by acting as a barrier against ingress of water and allowing the concrete to dry, as long as they have adequate water permeability characteristics. This paper presents the general criteria that may be followed to select a surface protection system, based on coating materials (hereinafter designated by coating system), for the rehabilitation of concrete structures affected by expansive reactions, in order to mitigate them and, thus, contribute to improve durability and service life of affected structures. In addition, a laboratory study is presented concerning the performance evaluation of a surface protection system, composed of two coating materials, in terms of its capacity to bridge cracks, its permeability to liquid and to water vapour, and on its effectiveness on controlling humidity inside concrete.

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Coatings and overlays for concrete affected by alkali-silica reaction

Cited by 6 publications

References 1 publication

Nonlinear Impact-Echo Test for Quantitative Evaluation of ASR Damage in Concrete

Nonlinear Impact-Echo Test for Quantitative Evaluation of ASR Damage in Concrete

Development of Distress Progress Model for Determining the Appropriate Time for Overlaying Durability Cracks in Concrete Pavement

Performance evaluation of a coating protection system for concrete structures affected by internal expansive reactions

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