Activation energy of alkali-silica reaction in CFBC fly ash geopolymer mortars

Shon Chang-Seon, Lee Dongoun

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The utilization of fly ashes produced by circulated fluidized bed combustion (CFBC) has been limited in construction application due to their inherent high sulfate and carbon contents although CFBC fly ash exhibits very good binding properties without requiring any supplementary activator. This study reports alkali silica reaction (ASR) behavior of CFBC fly ash geopolymer mortars in terms of activation energy using a modified ASTM C 1260/C 1567. Two different strengths of NaOH solution were used to test reactive and potentially reactive aggregates in the presence of CFBC fly ash. The other variables included a longer test period of 3 months and three different temperatures, namely 60°C, 70°C, and 80°C. It was observed that there was no significant expansion in CFBC fly ash based geopolymer mortar regardless of variation of temperature and alkalinity of test solution. Activation energy of CFBC fly ash geopolymer for ASR was higher than that of plain cement mortar irrespective of strength of NaOH solution.

Original languageEnglish
Title of host publicationManufacturing Sciences and Technologies VII
EditorsSujan Debnath
PublisherTrans Tech Publications
Pages77-82
Number of pages6
ISBN (Print)9783038357322
DOIs
Publication statusPublished - Jan 1 2017
Event7th International Conference on Manufacturing Science and Technology, ICMST 2016 - Sarawak, Malaysia
Duration: Jul 16 2016Jul 18 2016

Publication series

NameMaterials Science Forum
Volume882
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference7th International Conference on Manufacturing Science and Technology, ICMST 2016
CountryMalaysia
CitySarawak
Period7/16/167/18/16

Keywords

  • Activation energy
  • Alkali silica reaction
  • Circulating fluidized bed combustion fly ash
  • Geopolymer

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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