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Study of cement-fly ash paste exposed to sodium sulfate solutions with different concentrations at different temperatures

Zanqun Liu UGent, Geert De Schutter UGent, Dehua Deng and Yunhua Liu (2010) RILEM PROCEEDINGS. PRO 70. p.57-64
abstract
When concrete elements are partially exposed to sulfate environment, in the upper part of concrete elements above ground an aquiferous zone containing almost saturated and high pH value (> 12.5) sulfate pore solution will be formed. The concentration of sulfate solution is much higher than 5 %, as usually used in laboratory. It is necessary to study the performance of cement-fly ash paste in different high concentration sulfate solutions at different temperatures. In this paper, pure cement paste and cement - fly ash (25 % dosage) paste specimens were immersed in the 5 %, 15 %, 20 %, 30 %, 40 % and 50 % sodium solutions at 20°C, 30°C and 40°C respectively. After 1, 3 and 6 months immersion, the compressive strength of the specimens was measured. XRD and thermal analysis were employed to analyze the reactive products of the paste. The experimental results show that the reactive aluminum in fly ash is activated by high concentration sodium sulfate solution at different temperatures and more ettringite is generated than pure cement paste.
Please use this url to cite or link to this publication:
author
organization
year
type
conference (other)
publication status
published
subject
in
RILEM PROCEEDINGS
RILEM Proc.
editor
K van Breugel, Guang Ye UGent and Yong Yuan
volume
PRO 70
issue title
2nd International symposium on service life design for infrastructures
pages
57 - 64
publisher
RILEM Publications
place of publication
Bagneux, France
conference name
2nd International symposium on Service Life Design for Infrastructure
conference location
Delft, The Netherlands
conference start
2010-10-04
conference end
1010-10-06
ISBN
9782351580974
9782351580967
language
English
UGent publication?
yes
classification
C1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1266102
handle
http://hdl.handle.net/1854/LU-1266102
date created
2011-06-16 15:02:19
date last changed
2017-05-29 11:05:29
@inproceedings{1266102,
  abstract     = {When concrete elements are partially exposed to sulfate environment, in the upper part of concrete elements above ground an aquiferous zone containing almost saturated and high pH value ({\textrangle} 12.5) sulfate pore solution will be formed. The concentration of sulfate solution is much higher than 5 \%, as usually used in laboratory. It is necessary to study the performance of cement-fly ash paste in different high concentration sulfate solutions at different temperatures.
In this paper, pure cement paste and cement - fly ash (25 \% dosage) paste specimens were immersed in the 5 \%, 15 \%, 20 \%, 30 \%, 40 \% and 50 \% sodium solutions at 20{\textdegree}C, 30{\textdegree}C and 40{\textdegree}C respectively. After 1, 3 and 6 months immersion, the compressive strength of the specimens was measured. XRD and thermal analysis were employed to analyze the reactive products of the paste. The experimental results show that the reactive aluminum in fly ash is activated by high concentration sodium sulfate solution at different temperatures and more ettringite is generated than pure cement paste.},
  author       = {Liu, Zanqun and De Schutter, Geert and Deng, Dehua and Liu, Yunhua},
  booktitle    = {RILEM PROCEEDINGS},
  editor       = {van Breugel, K and Ye, Guang and Yuan, Yong},
  isbn         = {9782351580974},
  language     = {eng},
  location     = {Delft, The Netherlands},
  pages        = {57--64},
  publisher    = {RILEM Publications},
  title        = {Study of cement-fly ash paste exposed to sodium sulfate solutions with different concentrations at different temperatures},
  volume       = {PRO 70},
  year         = {2010},
}

Chicago
Liu, Zanqun, Geert De Schutter, Dehua Deng, and Yunhua Liu. 2010. “Study of Cement-fly Ash Paste Exposed to Sodium Sulfate Solutions with Different Concentrations at Different Temperatures.” In Rilem Proceedings, ed. K van Breugel, Guang Ye, and Yong Yuan, PRO 70:57–64. Bagneux, France: RILEM Publications.
APA
Liu, Zanqun, De Schutter, G., Deng, D., & Liu, Y. (2010). Study of cement-fly ash paste exposed to sodium sulfate solutions with different concentrations at different temperatures. In K. van Breugel, G. Ye, & Y. Yuan (Eds.), RILEM PROCEEDINGS (Vol. PRO 70, pp. 57–64). Presented at the 2nd International symposium on Service Life Design for Infrastructure, Bagneux, France: RILEM Publications.
Vancouver
1.
Liu Z, De Schutter G, Deng D, Liu Y. Study of cement-fly ash paste exposed to sodium sulfate solutions with different concentrations at different temperatures. In: van Breugel K, Ye G, Yuan Y, editors. RILEM PROCEEDINGS. Bagneux, France: RILEM Publications; 2010. p. 57–64.
MLA
Liu, Zanqun, Geert De Schutter, Dehua Deng, et al. “Study of Cement-fly Ash Paste Exposed to Sodium Sulfate Solutions with Different Concentrations at Different Temperatures.” Rilem Proceedings. Ed. K van Breugel, Guang Ye, & Yong Yuan. PRO 70. Bagneux, France: RILEM Publications, 2010. 57–64. Print.