Standard

Mitigation of efflorescence of cement-based exterior wall by using metakaolin. / Qian, C; Cao, T.; Dong, Hua.

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. 311-318 (Rilem proceedings; No. PRO 125).

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Harvard

Qian, C, Cao, T & Dong, H 2018, Mitigation of efflorescence of cement-based exterior wall by using metakaolin. 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. 311-318, 4th International Conference on Service
Life Design for Infrastructures, Delft, Netherlands, 27/08/18.

APA

Qian, C., Cao, T., & Dong, H. (2018). Mitigation of efflorescence of cement-based exterior wall by using metakaolin. In G. Ye, Y. Yuan, C. R. Rodriguez, H. Zhang, & B. Šavija (Eds.), 4th International Conference on Service Life Design for Infrastructures: (SLD4) 27-30 August 2018 – Delft, Netherlands (pp. 311-318). (Rilem proceedings; No. PRO 125). Rilem.

Vancouver

Qian C, Cao T, Dong H. Mitigation of efflorescence of cement-based exterior wall by using metakaolin. In Ye G, Yuan Y, Rodriguez CR, Zhang H, Šavija B, editors, 4th International Conference on Service Life Design for Infrastructures: (SLD4) 27-30 August 2018 – Delft, Netherlands. Rilem. 2018. p. 311-318. (Rilem proceedings; PRO 125).

Author

Qian, C ; Cao, T. ; Dong, Hua. / Mitigation of efflorescence of cement-based exterior wall by using metakaolin. 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. 311-318 (Rilem proceedings; PRO 125).

BibTeX

@inproceedings{66dc0e17c4884ce7a910f9f4cc91c226,
title = "Mitigation of efflorescence of cement-based exterior wall by using metakaolin",
abstract = "A typical cement-based exterior wall consists of a top coat, a base coat, an insulation layer, a steel frame and an interior layer. The top coat and the base coat are often made of mortar. Efflorescence at the surface of the top coat is a critical problem from the aesthetic point of view. The efflorescence can be caused by leaching of Ca(OH)2 from the top coat and the base coat. This paper aims to mitigate the efflorescence of the top coat by incorporating metakaolin.Cement in the top coats is substituted with metakaolin at different substitution rates (i.e. 0 - 20{\%} by mass of cement). Mechanical properties of the top coats are measured. The extent of the efflorescence of two-layer specimens (i.e., top coat + base coat) is quantified by image analysis. The content of Ca(OH)2 and the porosity of the top coats are determined for explaining the mechanism of mitigation of efflorescence by incorporating metakaolin. The results showthat the compressive strength and the flexural strength of the top coats are improved when the substitution rates of metakaolin are lower than 15{\%}. The metakaolin results in lower porosity and lower content of Ca(OH)2 in the tops, due to the filler effect and the pozzolanic reaction of metakaolin. The substitution of metakaolin for cement can effectively mitigate theefflorescence of the top coats, and the efficiency of metakaolin increases with the substitution rate (from 0 to 20{\%}). The conclusion is that metakaolin is a promising material for mitigating efflorescence of cement-based exterior wall.",
keywords = "Efflorescence, cement-based exterior wall, mitigation, metakaolin",
author = "C Qian and T. Cao and Hua Dong",
year = "2018",
language = "English",
series = "Rilem proceedings",
publisher = "Rilem",
number = "PRO 125",
pages = "311--318",
editor = "Guang Ye and Yong Yuan and Rodriguez, {Claudia Romero} and Hongzhi Zhang and Branko Šavija",
booktitle = "4th International Conference on Service Life Design for Infrastructures",

}

RIS

TY - GEN

T1 - Mitigation of efflorescence of cement-based exterior wall by using metakaolin

AU - Qian, C

AU - Cao, T.

AU - Dong, Hua

PY - 2018

Y1 - 2018

N2 - A typical cement-based exterior wall consists of a top coat, a base coat, an insulation layer, a steel frame and an interior layer. The top coat and the base coat are often made of mortar. Efflorescence at the surface of the top coat is a critical problem from the aesthetic point of view. The efflorescence can be caused by leaching of Ca(OH)2 from the top coat and the base coat. This paper aims to mitigate the efflorescence of the top coat by incorporating metakaolin.Cement in the top coats is substituted with metakaolin at different substitution rates (i.e. 0 - 20% by mass of cement). Mechanical properties of the top coats are measured. The extent of the efflorescence of two-layer specimens (i.e., top coat + base coat) is quantified by image analysis. The content of Ca(OH)2 and the porosity of the top coats are determined for explaining the mechanism of mitigation of efflorescence by incorporating metakaolin. The results showthat the compressive strength and the flexural strength of the top coats are improved when the substitution rates of metakaolin are lower than 15%. The metakaolin results in lower porosity and lower content of Ca(OH)2 in the tops, due to the filler effect and the pozzolanic reaction of metakaolin. The substitution of metakaolin for cement can effectively mitigate theefflorescence of the top coats, and the efficiency of metakaolin increases with the substitution rate (from 0 to 20%). The conclusion is that metakaolin is a promising material for mitigating efflorescence of cement-based exterior wall.

AB - A typical cement-based exterior wall consists of a top coat, a base coat, an insulation layer, a steel frame and an interior layer. The top coat and the base coat are often made of mortar. Efflorescence at the surface of the top coat is a critical problem from the aesthetic point of view. The efflorescence can be caused by leaching of Ca(OH)2 from the top coat and the base coat. This paper aims to mitigate the efflorescence of the top coat by incorporating metakaolin.Cement in the top coats is substituted with metakaolin at different substitution rates (i.e. 0 - 20% by mass of cement). Mechanical properties of the top coats are measured. The extent of the efflorescence of two-layer specimens (i.e., top coat + base coat) is quantified by image analysis. The content of Ca(OH)2 and the porosity of the top coats are determined for explaining the mechanism of mitigation of efflorescence by incorporating metakaolin. The results showthat the compressive strength and the flexural strength of the top coats are improved when the substitution rates of metakaolin are lower than 15%. The metakaolin results in lower porosity and lower content of Ca(OH)2 in the tops, due to the filler effect and the pozzolanic reaction of metakaolin. The substitution of metakaolin for cement can effectively mitigate theefflorescence of the top coats, and the efficiency of metakaolin increases with the substitution rate (from 0 to 20%). The conclusion is that metakaolin is a promising material for mitigating efflorescence of cement-based exterior wall.

KW - Efflorescence

KW - cement-based exterior wall

KW - mitigation

KW - metakaolin

M3 - Conference contribution

T3 - Rilem proceedings

SP - 311

EP - 318

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

ER -

ID: 46711219