Alkaline leaching method for the determination of the chloride content in the aqueous phase of hardened cementitious materials

M. Castellote; C. Alonso; C. Andrade; P. Castro; M. Echeverría

doi:10.1016/S0008-8846(00)00449-X

Alkaline leaching method for the determination of the chloride content in the aqueous phase of hardened cementitious materials

M. Castellote, C. Alonso, C. Andrade, P. Castro, M. Echeverría

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

The need of determining "free" chloride content in the aqueous phase of hardened cementitious materials arises from the fact that chloride is the responsible agent of the depassivation of the rebars in reinforced concrete. This paper presents a method of obtaining free chlorides by leaching in an alkaline solution during 24 h. The method is calibrated by comparison with the values obtained by means of the pore-pressing technique (PPT). The agreement found is reasonably good in spite of the risk of excessive leaching that aims to solve part of bound chlorides. The use of decarbonated water as extraction agent has resulted appropriately, perhaps due to the fact that the samples are not powdered, instead, pieces of around 2 mm in size are used.

Original language	English
Pages (from-to)	233-238
Number of pages	6
Journal	Cement and Concrete Research
Volume	31
Issue number	2
DOIs	https://doi.org/10.1016/S0008-8846(00)00449-X
State	Published - 2001
Externally published	Yes

Keywords

Analysis
Leaching
Pore solution
Soluble chloride

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10.1016/S0008-8846(00)00449-X

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title = "Alkaline leaching method for the determination of the chloride content in the aqueous phase of hardened cementitious materials",

abstract = "The need of determining {"}free{"} chloride content in the aqueous phase of hardened cementitious materials arises from the fact that chloride is the responsible agent of the depassivation of the rebars in reinforced concrete. This paper presents a method of obtaining free chlorides by leaching in an alkaline solution during 24 h. The method is calibrated by comparison with the values obtained by means of the pore-pressing technique (PPT). The agreement found is reasonably good in spite of the risk of excessive leaching that aims to solve part of bound chlorides. The use of decarbonated water as extraction agent has resulted appropriately, perhaps due to the fact that the samples are not powdered, instead, pieces of around 2 mm in size are used.",

keywords = "Analysis, Leaching, Pore solution, Soluble chloride",

author = "M. Castellote and C. Alonso and C. Andrade and P. Castro and M. Echeverr{\'i}a",

note = "Funding Information: The authors recognise the CICYT, CINVESTAV and CONACYT for their financial support of this work, and are grateful to the Community of Madrid (Spain) for the postdoctoral grant of M. Castellote, and to the CONACYT and CSIC for the postdoctoral grant of P. Castro.",

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doi = "10.1016/S0008-8846(00)00449-X",

language = "Ingl{\'e}s",

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pages = "233--238",

journal = "Cement and Concrete Research",

issn = "0008-8846",

number = "2",

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TY - JOUR

T1 - Alkaline leaching method for the determination of the chloride content in the aqueous phase of hardened cementitious materials

AU - Castellote, M.

AU - Alonso, C.

AU - Andrade, C.

AU - Castro, P.

AU - Echeverría, M.

N1 - Funding Information: The authors recognise the CICYT, CINVESTAV and CONACYT for their financial support of this work, and are grateful to the Community of Madrid (Spain) for the postdoctoral grant of M. Castellote, and to the CONACYT and CSIC for the postdoctoral grant of P. Castro.

PY - 2001

Y1 - 2001

N2 - The need of determining "free" chloride content in the aqueous phase of hardened cementitious materials arises from the fact that chloride is the responsible agent of the depassivation of the rebars in reinforced concrete. This paper presents a method of obtaining free chlorides by leaching in an alkaline solution during 24 h. The method is calibrated by comparison with the values obtained by means of the pore-pressing technique (PPT). The agreement found is reasonably good in spite of the risk of excessive leaching that aims to solve part of bound chlorides. The use of decarbonated water as extraction agent has resulted appropriately, perhaps due to the fact that the samples are not powdered, instead, pieces of around 2 mm in size are used.

AB - The need of determining "free" chloride content in the aqueous phase of hardened cementitious materials arises from the fact that chloride is the responsible agent of the depassivation of the rebars in reinforced concrete. This paper presents a method of obtaining free chlorides by leaching in an alkaline solution during 24 h. The method is calibrated by comparison with the values obtained by means of the pore-pressing technique (PPT). The agreement found is reasonably good in spite of the risk of excessive leaching that aims to solve part of bound chlorides. The use of decarbonated water as extraction agent has resulted appropriately, perhaps due to the fact that the samples are not powdered, instead, pieces of around 2 mm in size are used.

KW - Analysis

KW - Leaching

KW - Pore solution

KW - Soluble chloride

UR - http://www.scopus.com/inward/record.url?scp=0001208615&partnerID=8YFLogxK

U2 - 10.1016/S0008-8846(00)00449-X

DO - 10.1016/S0008-8846(00)00449-X

M3 - Artículo

SN - 0008-8846

VL - 31

SP - 233

EP - 238

JO - Cement and Concrete Research

JF - Cement and Concrete Research

IS - 2

ER -

Alkaline leaching method for the determination of the chloride content in the aqueous phase of hardened cementitious materials

Abstract

Keywords

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