Study of carbonation rate of synthesized C-S-H by NMR and FTIR

Bei Wu; Guang Ye; Yunpeng Liu; Wenqin Zhang

Study of carbonation rate of synthesized C-S-H by NMR and FTIR

Bei Wu, Guang Ye, Yunpeng Liu, Wenqin Zhang

Materials and Environment

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

Abstract

C-S-H with different Ca/Si ratios, formed from the hydration and pozzolanic reactions of blended cement paste, are the major calcium-bearing phases which react with CO2 during the carbonation. Therefore, it’s important to study the carbonation rate of different C-S-H phases. In this paper, the C-S-H phases (Ca/Si ratio: 0.66 to 2.0) were synthesized and used for the accelerated carbonation test with the CO2 concentration of 3%±0.2. Synthesized C-S-H phases with different Ca/Si ratio were identified by 29Si nuclear magnetic resonance (NMR). Carbonation rate and products of different C-S-H phases were studied by NMR and Fouriertransform infrared spectroscopy (FTIR). The results show that C-S-H phases with different Ca/Si ratio (lower than 1.40) was synthesized. C-S-H with lower Ca/Si ratio is decomposed faster than that with a higher Ca/Si ratio. After three days’ accelerated carbonation, the C-S-H phases with different Ca/Si ratio were all fully decomposed to CaCO3 and silica gel.

Original language	English
Title of host publication	4th International Conference on Service Life Design for Infrastructures
Subtitle of host publication	(SLD4) 27-30 August 2018 – Delft, Netherlands
Editors	Guang Ye, Yong Yuan, Claudia Romero Rodriguez, Hongzhi Zhang, Branko Šavija
Publisher	Rilem
Pages	167-170
ISBN (Electronic)	978-2-35158-213-8
Publication status	Published - 2018
Event	4th International Conference on Service Life Design for Infrastructures - Delft, Netherlands Duration: 27 Aug 2018 → 30 Aug 2018 Conference number: 4

Publication series

Name	Rilem proceedings
Publisher	Rilem
Number	PRO 125

Conference

Conference	4th International Conference on Service Life Design for Infrastructures
Abbreviated title	SLD4
Country/Territory	Netherlands
City	Delft
Period	27/08/18 → 30/08/18

Keywords

C-S-H
Ca/Si ratio
carbonation rate

Cite this

Wu, Bei ; Ye, Guang ; Liu, Yunpeng et al. / Study of carbonation rate of synthesized C-S-H by NMR and FTIR. 4th International Conference on Service Life Design for Infrastructures: (SLD4) 27-30 August 2018 – Delft, Netherlands. editor / Guang Ye ; Yong Yuan ; Claudia Romero Rodriguez ; Hongzhi Zhang ; Branko Šavija. Rilem, 2018. pp. 167-170 (Rilem proceedings; PRO 125).

@inproceedings{5b6df3e2a3e948649a7061e382d631f4,

title = "Study of carbonation rate of synthesized C-S-H by NMR and FTIR",

abstract = "C-S-H with different Ca/Si ratios, formed from the hydration and pozzolanic reactions of blended cement paste, are the major calcium-bearing phases which react with CO2 during the carbonation. Therefore, it{\textquoteright}s important to study the carbonation rate of different C-S-H phases. In this paper, the C-S-H phases (Ca/Si ratio: 0.66 to 2.0) were synthesized and used for the accelerated carbonation test with the CO2 concentration of 3%±0.2. Synthesized C-S-H phases with different Ca/Si ratio were identified by 29Si nuclear magnetic resonance (NMR). Carbonation rate and products of different C-S-H phases were studied by NMR and Fouriertransform infrared spectroscopy (FTIR). The results show that C-S-H phases with different Ca/Si ratio (lower than 1.40) was synthesized. C-S-H with lower Ca/Si ratio is decomposed faster than that with a higher Ca/Si ratio. After three days{\textquoteright} accelerated carbonation, the C-S-H phases with different Ca/Si ratio were all fully decomposed to CaCO3 and silica gel.",

keywords = "C-S-H, Ca/Si ratio, carbonation rate",

author = "Bei Wu and Guang Ye and Yunpeng Liu and Wenqin Zhang",

year = "2018",

language = "English",

series = "Rilem proceedings",

publisher = "Rilem",

number = "PRO 125",

pages = "167--170",

editor = "Guang Ye and Yong Yuan and Rodriguez, {Claudia Romero} and Hongzhi Zhang and Branko {\v S}avija",

booktitle = "4th International Conference on Service Life Design for Infrastructures",

note = "4th International Conference on Service<br/>Life Design for Infrastructures, SLD4 ; Conference date: 27-08-2018 Through 30-08-2018",

}

Wu, B , Ye, G, Liu, Y & Zhang, W 2018, Study of carbonation rate of synthesized C-S-H by NMR and FTIR. in G Ye, Y Yuan, CR Rodriguez, H Zhang & B Šavija (eds), 4th International Conference on Service Life Design for Infrastructures: (SLD4) 27-30 August 2018 – Delft, Netherlands. Rilem proceedings, no. PRO 125, Rilem, pp. 167-170, 4th International Conference on Service
Life Design for Infrastructures, Delft, Netherlands, 27/08/18.

Study of carbonation rate of synthesized C-S-H by NMR and FTIR. / Wu, Bei ; Ye, Guang; Liu, Yunpeng et al.
4th International Conference on Service Life Design for Infrastructures: (SLD4) 27-30 August 2018 – Delft, Netherlands. ed. / Guang Ye; Yong Yuan; Claudia Romero Rodriguez; Hongzhi Zhang; Branko Šavija. Rilem, 2018. p. 167-170 (Rilem proceedings; No. PRO 125).

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

TY - GEN

T1 - Study of carbonation rate of synthesized C-S-H by NMR and FTIR

AU - Wu, Bei

AU - Ye, Guang

AU - Liu, Yunpeng

AU - Zhang, Wenqin

N1 - Conference code: 4

PY - 2018

Y1 - 2018

N2 - C-S-H with different Ca/Si ratios, formed from the hydration and pozzolanic reactions of blended cement paste, are the major calcium-bearing phases which react with CO2 during the carbonation. Therefore, it’s important to study the carbonation rate of different C-S-H phases. In this paper, the C-S-H phases (Ca/Si ratio: 0.66 to 2.0) were synthesized and used for the accelerated carbonation test with the CO2 concentration of 3%±0.2. Synthesized C-S-H phases with different Ca/Si ratio were identified by 29Si nuclear magnetic resonance (NMR). Carbonation rate and products of different C-S-H phases were studied by NMR and Fouriertransform infrared spectroscopy (FTIR). The results show that C-S-H phases with different Ca/Si ratio (lower than 1.40) was synthesized. C-S-H with lower Ca/Si ratio is decomposed faster than that with a higher Ca/Si ratio. After three days’ accelerated carbonation, the C-S-H phases with different Ca/Si ratio were all fully decomposed to CaCO3 and silica gel.

AB - C-S-H with different Ca/Si ratios, formed from the hydration and pozzolanic reactions of blended cement paste, are the major calcium-bearing phases which react with CO2 during the carbonation. Therefore, it’s important to study the carbonation rate of different C-S-H phases. In this paper, the C-S-H phases (Ca/Si ratio: 0.66 to 2.0) were synthesized and used for the accelerated carbonation test with the CO2 concentration of 3%±0.2. Synthesized C-S-H phases with different Ca/Si ratio were identified by 29Si nuclear magnetic resonance (NMR). Carbonation rate and products of different C-S-H phases were studied by NMR and Fouriertransform infrared spectroscopy (FTIR). The results show that C-S-H phases with different Ca/Si ratio (lower than 1.40) was synthesized. C-S-H with lower Ca/Si ratio is decomposed faster than that with a higher Ca/Si ratio. After three days’ accelerated carbonation, the C-S-H phases with different Ca/Si ratio were all fully decomposed to CaCO3 and silica gel.

KW - C-S-H

KW - Ca/Si ratio

KW - carbonation rate

M3 - Conference contribution

T3 - Rilem proceedings

SP - 167

EP - 170

BT - 4th International Conference on Service Life Design for Infrastructures

A2 - Ye, Guang

A2 - Yuan, Yong

A2 - Rodriguez, Claudia Romero

A2 - Zhang, Hongzhi

A2 - Šavija, Branko

PB - Rilem

T2 - 4th International Conference on Service<br/>Life Design for Infrastructures

Y2 - 27 August 2018 through 30 August 2018

ER -

Study of carbonation rate of synthesized C-S-H by NMR and FTIR

Abstract

Publication series

Conference

Keywords

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