Assessing concrete carbonation resistance through air permeability measurements

Neves, R.; Fonseca, B. Sena da; Branco, Fernando A.; Brito, Jorge de; Castela, A.S.; Montemor, M.F.

doi:10.1016/j.conbuildmat.2015.02.075

Cited by 51 publications

(26 citation statements)

References 20 publications

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“…5, neutralization coefficient is highly correlated with the compression strength for all types of cement which is in line with other studies (Al-Amoudi et al 2009;Guiglia and Taliano 2010;Neves et al 2015). But those studies showed rather less correlation between air permeability and neutralization suggesting that estimation would be better considering compressive strength.…”

Section: Relation Between Air Permeability Neutralizationsupporting

confidence: 80%

“…Neutralization coefficient increases for any cement type with increase in W/B, and with increase in air permeability (Basheer et al 2001;Khunthongkeaw et al 2006;Neves et al 2015 means W/B, air permeability, neutralization coefficient and compressive strength are all highly correlated (Sanjuan and Munoz-Martialay 1996;Hui-sheng et al 2009;Neves et al 2015;Salvoldi et al 2015). Between cement types, for same W/B, curing condition and air permeability, OPC shows less neutralization compared to BBC and FAC similar to the findings of (Bijen 1996;Khunthongkeaw et al 2006).…”

Section: Relation Between Air Permeability Neutralizationsupporting

confidence: 67%

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Durability Assessment of Blended Concrete by Air Permeability

Katpady

Hazehara

Soeda

et al. 2018

Int J Concr Struct Mater

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Assessment of concrete cover quality is necessary for proper maintenance of concrete structures. Concrete durability is evaluated primarily based on chloride penetrability, neutralization and other external factors. The present study attempts to analyze concrete quality and its mass transfer resistance performance by measuring the air permeability and its relation with concrete durability indicators like chloride diffusion and neutralization. The applicability of air permeability as a durability indicator is validated using concrete with different materials, parameters and curing conditions. The tests are conducted on laboratory prepared concrete as well as for concrete exposed to actual marine conditions. From the experimental results, it is found that air permeability coefficient, neutralization coefficient and chloride ion diffusion coefficient have high correlation. It is suggested that air permeability could be considered as an alternative to estimate mass transfer resistance of concrete and as a concrete durability indicator.

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Section: Relation Between Air Permeability Neutralizationsupporting

confidence: 80%

Section: Relation Between Air Permeability Neutralizationsupporting

confidence: 67%

Durability Assessment of Blended Concrete by Air Permeability

Katpady

Hazehara

Soeda

et al. 2018

Int J Concr Struct Mater

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“…Good correlations between the surface air-permeability coefficient and various test parameters such as water absorption rate (Beglarigale et al 2014), carbonation depth (Neves et al 2015), and diffusion coefficient of a chloride ion have been reported (Andrade et al 2000). Switzerland has established a specification that requires the evaluation of mass-transfer resistance in covercrete by performing certain tests, including the Torrent method (AGB 2007/007).…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Relationship among Air Permeability, Pore Size and Pressure Assuming Molecular and Viscous Flows

Sakai

2017

ACT

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The relationship among air permeability, pressure, and pore size from a viscous-to a molecular-flow region is not well understood. In this work, air permeability in a straight circular pipe was studied considering viscous and molecular flows. I learned that the air-permeability coefficient and intrinsic air-permeability coefficient exhibit contrasting pressure dependence: that of the air-permeability coefficient is larger in a larger pore, whereas that of the intrinsic air-permeability coefficient is larger in a smaller pore. I thus proposed a method to obtain the air-permeability coefficient at atmospheric pressure from that measured under vacuum or pressurised condition. From the Reynolds number study, turbulent flow study is unnecessary in air flow in concrete.

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“…

The authors thank Jiang and Gu for their interest in and subsequent discussion of our paper [1]. Jiang and Gu developed a new model for the assessment of concrete carbonation resistance through air permeability measurements.

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confidence: 99%