Effect of fly ash on resistance to sulfate attack of cement-based materials

Kaiwei Liu, Min Deng, Liwu Mo

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

12 Scopus citations

Abstract

The resistance to sulfate attack of mortars containing 0%, 20%, and 40% of fly ash cured in 5 wt. % sodium sulfate solution at 20°C was investigated in this paper. Visual appearance, cracking analysis, velocity of ultrasonic wave and length change were applied to evaluate the sulfate resistance of mortars. The phases and microstructure of the reaction products due to sulfate attack were examined by XRD and SEM, and the pore structure of the mortars was analyzed by MIP. The effects of fly ash on the sulfate attack of mortars were analyzed. Results indicated that the addition of fly ash improved the resistance of sulfate attack significantly, this probably contributed to the pozzonlanic reaction of fly ash.

Original languageEnglish
Title of host publicationTesting and Evaluation of Advanced Building Materials
PublisherTrans Tech Publications Ltd
Pages124-129
Number of pages6
ISBN (Print)9783037855775
DOIs
StatePublished - 2013
Event1st National Academic Symposium on Testing and Evaluation of Building Materials, TEBM 2012 - Shanghai, China
Duration: 22 Jun 201224 Jun 2012

Publication series

NameKey Engineering Materials
Volume539
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

Conference1st National Academic Symposium on Testing and Evaluation of Building Materials, TEBM 2012
Country/TerritoryChina
CityShanghai
Period22/06/1224/06/12

Keywords

  • Ettringite
  • Fly ash
  • Gypsum
  • Sulfate attack

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