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Thermal property of geopolymer on fly ash-blast furnace slag system with the addition of alumina aggregate

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2017, 27(1), pp.47~56
  • DOI : 10.6111/JKCGCT.2017.27.1.047
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : November 9, 2016
  • Accepted : January 6, 2017
  • Published : February 28, 2017

Jinho Kim 1,  In-Tak Nam 1,  Hyun Park 1,  Kyung-Nam Kim 1

1강원대학교

Accredited

ABSTRACT

In this study, the higher temperature thermal property of the fly ash-blast furnace slag system Geopolymer including alumina aggregate was investigated whether that Geopolymer will be or not useful as thermal-resistant construction materials. Under every mixing conditions, the crack on the surface of hardened body was not observed up to 800 o C and it corresponded with fact that level of changes was not significant before and after heating process. Residual compressive strength is most high when mixing Blast-Furnace Slag ratio is 60 wt% until temperature reaches 800 o C. The major hydrates of hardened body of Geopolymer; amorphous halo pattern between 20~35 o (2theta) and mullite (3Al2O3 · 2SiO2) and quartz (SiO2) was found during the experiment. Amorphous halo pattern was a aluminosilicate gel generated by geopolymeric polycondensation and it was found that the halo pattern of aluminosilicate gel was preserved up to 800 o C. The patterns of aluminosilicate gel disappeared from 1,000 o C and crystal phases like gehlenite, calcium silicate, calcium aluminum oxide, microcline was observed with the increase of exposure temperature.

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