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Cited by 15Concrete and Cement Materials ResearchConcrete Corrosion and DurabilityRecycled Aggregate Concrete Performance

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A method for calculating the carbonation degree of calcium–silicate–hydrate

Shen, Qizhen, Pan, Ganghua, Bao, Bingfeng·2018·Advances in Cement Research
DOI 10.1680/jadcr.16.00086
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Abstract

The carbonation degree of calcium–silicate–hydrate (CSH) was quantitatively characterised using a direct test method. Nuclear magnetic resonance (NMR) and thermogravimetric methods were used to study different depths of cement paste with a water/cement ratio of 0·35 after 28 d of carbonation. Firstly, based on the hydration and carbonation reaction equations of the CSH, the variation of Ca 2+can be obtained, and then according to the variation of Ca 2+to calculate the carbonation degree of CSH. Secondly, the parameter I(Q 2)/I(Q 1) was determined to characterise the structural change of the CSH quantitatively. Finally, the relationship between the CSH carbonation degree and I(Q 2)/I(Q 1) was analysed. The results showed that the carbonation degree of CSH can be expressed as the ratio of the molar content of calcium carbonate carbonated by CSH and the molar content of Ca 2+in the initial CSH. A good linear relationship was found between the value of I(Q 2)/I(Q 1) and the CSH carbonation degree. Therefore, the NMR method can be used to determine the carbonation degree of CSH.

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Metadata

Authors
Shen, Q., Pan, G., & Bao, B.
Affiliations
  • Ludong University (CN)
  • Jiangsu Key Laboratory of Construction Materials (CN)
Corresponding author
Shen, Qizhen
ORCID
Pan, Ganghua
Venue
Advances in Cement Research
Publisher
Emerald
Published
2018-10
Volume
30
Issue
9
Pages
427-436
ISSN
  • 0951-7197 (ISSN-L)
  • 1751-7605
DOI
10.1680/jadcr.16.00086
OpenAlex
W2807160782
Cited by
15
References
40
Citations by year
2026: 2 · 2025: 1 · 2024: 1 · 2023: 2 · 2022: 1 · 2021: 2 · 2020: 3 · 2019: 3
FWCI
1.80
Type
journal article
Language
en
Open access
closed
Locations
Advances in Cement Research (publishedVersion)
Funders
Southeast University
Topics
  • Physical Sciences › Engineering › Civil and Structural Engineering › Concrete and Cement Materials Research
  • Physical Sciences › Engineering › Civil and Structural Engineering › Concrete Corrosion and Durability
  • Physical Sciences › Engineering › Building and Construction › Recycled Aggregate Concrete Performance
Keywords
calcium silicate hydrate, carbonation degree, cement paste, calcium carbonate

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