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Journal of Thermal Analysis and Calorimetry

, Volume 138, Issue 3, pp 2123–2130 | Cite as

Thermal analysis and phase formation of eco-friendly cold-bonded high-calcium fly ash–calcium hydroxide lightweight aggregate at various curing time

  • Chalermphan Narattha
  • Arnon ChaipanichEmail author
Article
  • 23 Downloads

Abstract

The research on fly ash lightweight aggregate has been of great interest recently due to its potential for use as a substitute for natural aggregate in concrete mixes. In this work, thermogravimetric analysis of cold-bonded high-calcium fly ash lightweight aggregate with and without minor use of calcium hydroxide was investigated. Calcium hydroxide was used at 5 and 10% to replace part of fly ash. Thermogravimetric analysis measurements were carried out on samples at 0, 3 and 28 days. The results showed that calcium silicate hydrate phase in fly ash–calcium hydroxide mix is higher than reference fly ash mix. This is due to the reaction of calcium hydroxide which helps accelerate the pozzolanic reaction of fly ash. Calcium silicate hydrate was also shown to increase with curing time. Moreover, calcium hydroxide and minor calcium carbonate peaks can also be seen in all mixes while the highest amount of calcium hydroxide was found in the 90FA10CH mix.

Keywords

Thermogravimetry Fly ash Calcium hydroxide Lightweight aggregate Cold bonding 

Notes

Acknowledgements

The authors gratefully acknowledge Chiang Mai University for funding this research under the CMU 50th Anniversary Ph.D. Grant (PHD/015/2556). The authors also thank the Thailand Research Fund for the Research Career Development Grant given to Associate Professor Dr. Arnon Chaipanich. This research work was partially supported by Chiang Mai University.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.Advanced Cement-based Materials Research Laboratory, Department of Physics and Materials Science, Faculty of ScienceChiang Mai UniversityChiang MaiThailand
  2. 2.PhD’s Degree Program in Materials Science, Faculty of ScienceChiang Mai UniversityChiang MaiThailand
  3. 3.Center of Excellence in Materials Science and TechnologyChiang Mai UniversityChiang MaiThailand

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