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Concrete carbonation and chloride penetration in

2020-3-3  Concrete Science and Engineering, Vol. 3, December 2001, pp 242-249 ABSTRACT In an inspection and appraisal study of a series of 25-year-old concrete structures in a dockyard constructed with poor quality concrete, it was found that both chloride penetration and carbonation played a significant role in the deterioration of the

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(PDF) Concrete carbonation and chloride penetration in a ...

However, the experimental results show that the carbonation rate in medium-and highquality concrete is much lower than the chloride penetration rate, i.e., the carbonation mechanism is of little...

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EFFECT OF CARBONATION ON CHLORIDE PENETRATION

2020-3-3  When chloride ions ingress and carbonation take place simultaneously in concrete, chloride ions that have been fixed in cement hydrates will be unfixed and become soluble due to the deterioration of cement hydrates caused by carbonation. It has been observed that chloride ions concentrate in the region where carbonation has not occurred. Therefore, for concrete subjected to both chloride ions ingress and carbonation the corrosion of steel bars in it may take place at an early stage and the rate of corrosion may also increase. Therefore, when chloride ions ingress and carbonation are co-existed the prediction of the distribution of chloride ions in concrete is essential to the evaluation of concrete

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Carbonation Chloride Penetration of Concrete Structures

2013-6-13  Annua Concrete Sem nar 2005 Annual Concrete Seminar 2005 1 Carbonation Chloride Penetration of Concrete Structures Dr Tommy oo City University of Hong Kong Annual Concrete Seminar 2005Annua Concrete Sem nar 2005 2 Durable concrete must have the ability to withstand the potentially deteriorative conditions to which it can reasonably be

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Chloride Penetration and Carbonation in Geopolymer

2011-2-28  Title: Chloride Penetration and Carbonation in Geopolymer Concrete Author(s): Publication: CIA Volume: Issue: Appears on pages(s): Keywords: Date: 2/28/2011 Abstract: The use of industrial by-products to partly substitute ordinary Portland cement (OPC) has become common practice.

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Effects of Carbonation on Chloride Penetration in Concrete ...

Therefore, the purpose of this study is to explore the influence of carbonation on chloride penetration in concrete structures. Several series of concrete specimens were tested. The test results...

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Effect of early carbonation curing on chloride penetration ...

2016-10-1  Early carbonation curing of concretes was developed for accelerating the strength gain and promoting carbon dioxide utilization in concrete. However, the effect of early carbonation curing on chloride penetration was not clear. It was reported that weathering carbonation of concrete could increase chloride penetration.

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Chloride penetration in concrete exposed to cyclic drying ...

2016-6-1  Carbonation can lower both the total chloride and free chloride contents at carbonated region, and increase the chloride content at carbonation fronts. (4) The incorporation of SCMs makes concrete more vulnerable to chloride attack under a combined deterioration of cyclic drying-wetting and carbonation, since the deficiency of portlandite ...

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Quantitative estimation of carbonation and chloride ...

2014-11-1  The apparent diffusion coefficient, which is one of the most important parameters for chloride penetration in concrete, was estimated using the depth profile of chlorine emission intensity and Fick's law. The carbonation depth was estimated on the basis of the relationship between carbon and calcium emission intensities.

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Combined impact of carbonation and crack width on the ...

2021-1-1  2.2. Specimen geometry. Three 100 mm cube specimens were used for testing the compressive strength and porosity of concrete. Three reinforced concrete prisms of 100 × 100 × 500 mm were used to measure the depth of carbonation (DoC), chloride penetration and corrosion condition (using half-cell corrosion potential) in both the cracked and un-cracked specimens.

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Concrete carbonation and chloride penetration in

2020-3-3  Concrete Science and Engineering, Vol. 3, December 2001, pp 242-249 ABSTRACT In an inspection and appraisal study of a series of 25-year-old concrete structures in a dockyard constructed with poor quality concrete, it was found that both chloride penetration and carbonation played a significant role in the deterioration of the

Get price

(PDF) Carbonation and Chloride Penetration in Concrete ...

Carbonation and Chloride Penetration in Concrete Made with Fine Recycled Concrete Aggregates September 2006 Conference: INCOS06 - International Conference on Concrete for Structures, IBRACON

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Effects of Carbonation on Chloride Penetration in Concrete ...

Concerning the influence of concrete carbonation on the chloride penetration there is a supposed "opposite effect". It is known that the carbonation changes the concrete microstructure and the pH ...

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Chloride Penetration and Carbonation in Geopolymer

2011-2-28  Title: Chloride Penetration and Carbonation in Geopolymer Concrete Author(s): Publication: CIA Volume: Issue: Appears on pages(s): Keywords: Date: 2/28/2011 Abstract: The use of industrial by-products to partly substitute ordinary Portland cement (OPC) has become common practice.

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(PDF) Chloride Penetration into Carbonated Concrete

2016-5-10  Results show that carbonation has a direct influence on chloride penetration, decreasing it for cement mortars with 0% fly ash and increasing it for mortars with 40% cement replacement by fly ash.

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CHLORIDE PENETRATION AND CARBONATION IN SELF-

2011-2-8  Page 1 CHLORIDE PENETRATION AND CARBONATION IN SELF-COMPACTING CONCRETE Gert Heirman (1), Lucie Vandewalle (1), Veerle Boel (2), Katrien Audenaert (2), Geert De Schutter (2), Jacques D’Hemricourt (3), Bram Desmet (3), John Vantomme (3) (1) Department of Civil Engineering – Reyntjens Laboratory, K.U.Leuven, Belgium (2) Magnel Laboratory for Concrete

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A Review on the Carbonation and Chloride Penetration ...

This paper presents a comprehensive review on structural lightweight aggregate concrete (SLWAC) durability. The main transport properties and degradation mechanisms of reinforced concrete are addressed, namely, carbonation and chloride attack. The influence of the main composition parameters, such as type of aggregate, type of binder and water/binder ratio, as well as the influence of cracking ...

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Resistance of concrete to carbonation and chloride ...

2020-9-8  The paper describes the main mechanisms of carbonation and chloride penetration into concrete and how the rate of penetration can be measured with laboratory tests. It is also discussed why nondestructive test (NDT) methods for measuring directly the resistance of aged field concrete to carbonation or chloride penetration are not available.

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(PDF) CORRELATION PERMEABILITY/CARBONATION AND

It is widely acknowledged that reinforcing steel corrosion is the most common deterioration mechanism in reinforced concrete structures and that chloride penetration is one of the processes that ...

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Chloride Penetration in Coastal Concrete Structures: Field ...

2019-12-23  Field measurements of 42 in-service reinforced concrete bridges in coastal environments of Southeast China, covering a wide range of service year, span length, and concrete mixture, were carried out to investigate the chloride penetration. 323 sets of chloride measurement data were collected in total and then analysed to optimize the parameters involved in the common chloride diffusion model ...

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(PDF) Carbonation and Chloride Penetration in Concrete ...

Carbonation and Chloride Penetration in Concrete Made with Fine Recycled Concrete Aggregates September 2006 Conference: INCOS06 - International Conference on Concrete for Structures, IBRACON

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Chloride penetration and carbonation in self-compacting ...

The chloride diffusion coefficient (D t ) is an important parameter that measures chloride penetration of concrete and characterizes the chloride diffusion rate in concrete.

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A Review on the Carbonation and Chloride Penetration ...

This paper presents a comprehensive review on structural lightweight aggregate concrete (SLWAC) durability. The main transport properties and degradation mechanisms of reinforced concrete are addressed, namely, carbonation and chloride attack. The influence of the main composition parameters, such as type of aggregate, type of binder and water/binder ratio, as well as the influence of cracking ...

Get price

A Review on the Carbonation and Chloride Penetration ...

This paper presents a comprehensive review on structural lightweight aggregate concrete (SLWAC) durability. The main transport properties and degradation mechanisms of reinforced concrete are addressed, namely, carbonation and chloride attack. The influence of the main composition parameters, such as type of aggregate, type of binder and water/binder ratio, as well as the influence of cracking ...

Get price

CHLORIDE PENETRATION AND CARBONATION IN SELF-

2011-2-8  Page 1 CHLORIDE PENETRATION AND CARBONATION IN SELF-COMPACTING CONCRETE Gert Heirman (1), Lucie Vandewalle (1), Veerle Boel (2), Katrien Audenaert (2), Geert De Schutter (2), Jacques D’Hemricourt (3), Bram Desmet (3), John Vantomme (3) (1) Department of Civil Engineering – Reyntjens Laboratory, K.U.Leuven, Belgium (2) Magnel Laboratory for Concrete

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Effect of Natural Pozzolan on Carbonation and Chloride ...

2020-5-5  penetration into concrete, the influence of pozzolan through them must be investigated for concrete durability. This paper mainly focuses on the experimental study of the influence of Popa volcanic natural pozzolan on carbonation and chloride penetration process.

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Influence of Carbonation on Resistance of Concrete the ...

2020-4-24  the effect of carbonation in reinforced concrete samples on the penetration of chloride and degree of corrosion in cracked and un-cracked concrete 2samples. 2 Experimental work 2.1 Materials and Concrete Mix Design Portland limestone cement (CEM II/A-LL 32,5R) with a specific gravity of 3.05 was used in this study. Chemical

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(PDF) CORRELATION PERMEABILITY/CARBONATION AND

It is widely acknowledged that reinforcing steel corrosion is the most common deterioration mechanism in reinforced concrete structures and that chloride penetration is one of the processes that ...

Get price

Chloride Penetration in Coastal Concrete Structures: Field ...

2019-12-23  Field measurements of 42 in-service reinforced concrete bridges in coastal environments of Southeast China, covering a wide range of service year, span length, and concrete mixture, were carried out to investigate the chloride penetration. 323 sets of chloride measurement data were collected in total and then analysed to optimize the parameters involved in the common chloride diffusion model ...

Get price

Effect of carbonation on release of bound chlorides in ...

2020-4-3  that has been published on concrete carbonation and its influ-ence on chloride binding, there is not much work focusing on the quantification of release of bound chlorides in chloride-contaminated concrete caused by concrete carbonation. In this paper an experimental study is presented on the release of bound chlorides in chloride-contaminated ...

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