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Journal of Thermal Analysis and Calorimetry

, Volume 138, Issue 3, pp 2065–2075 | Cite as

Heat of hydration of cement pastes containing high-volume fly ash and silica fume

  • Watcharapong Wongkeo
  • Pailyn Thongsanitgarn
  • Chi-Sun Poon
  • Arnon ChaipanichEmail author
Article
  • 93 Downloads

Abstract

This paper reports the effect of high-volume fly ash (low and high calcium types) with and without silica fume as Portland cement replacement on the heat of hydration of binary and ternary cement mixes. Both low and high calcium fly ash types were used to replace part of Portland cement at 50%, 60% and 70% by mass as binary cement mixes. The combination of fly ash and silica fume at 10% by mass as ternary cement mixes was also studied. The results indicated that low calcium fly ash retarded the rate of heat evolution more than high calcium fly ash at the same cement replacement levels. The total released heat reduction of about 70% can be achieved as Portland cement was replaced up to 70 mass% with low calcium fly ash. Total released heat of high calcium fly ash when compared to low calcium fly ash at 50%, 60% and 70% by mass of Portland cement replacement levels were higher by approximately 35%, 24% and 63%, respectively. The results confirmed that CaO content in fly ash had a significant effect on the hydration reaction of these cement mixes. In ternary cement mixes, in both low and high calcium fly ash, silica fume acted as a nucleation site that results to acceleration in the rate of heat evolution and total released heat more so than binary mix cement pastes, which contributed to the increase in early age compressive strength.

Keywords

Heat of hydration Compressive strength Porosity Cement High-volume fly ash Silica fume 

Notes

Acknowledgements

Dr. Watcharapong Wongkeo would like to thank the Office of the Higher Education Commission, Thailand, for supporting by grant fund under the program Strategic Scholarships for Frontier Research Network for the Ph.D. Program Thai Doctoral degree for this research. The Thailand Research Fund is acknowledged for research grant (research scholar award) given to associate professor Dr. Arnon Chaipanich. This research work was partially supported by Chiang Mai University. The authors also wish to thank the Research office, The Hong Kong Polytechnic University under the program Research Student Attachment Programme In-coming Visiting Ph.D. Students for additional financial support.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  • Watcharapong Wongkeo
    • 1
  • Pailyn Thongsanitgarn
    • 2
    • 3
  • Chi-Sun Poon
    • 4
  • Arnon Chaipanich
    • 5
    • 6
    Email author
  1. 1.Physics and General Science Program, Faculty of Science and TechnologyNakhon Ratchasima Rajabhat UniversityNakhon RatchasimaThailand
  2. 2.Aviation Industrial InstituteRajamangala University of Technology IsanNakhon RatchasimaThailand
  3. 3.Faculty of Sciences and Liberal ArtsRajamangala University of Technology IsanNakhon RatchasimaThailand
  4. 4.Department of Civil and Environmental EngineeringThe Hong Kong Polytechnic UniversityHung HomHong Kong
  5. 5.Advanced Cement-Based Materials Research Laboratory, Department of Physics and Materials Science, Faculty of ScienceChiang Mai UniversityChiang MaiThailand
  6. 6.Center of excellence in Materials Science and TechnologyChiang Mai UniversityChiang MaiThailand

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