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Low Temperature Cement Synthesis: Calcium Sulfoaluminate-Belite from Industrial Wastes

Maneerat Thala 1 and Kedsarin Pimraksa 2
1. Department of Industrial Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand
2. Department of Industrial Chemistry and Center of Excellence in Materials Science and Technology, Chiang Mai Uni-versity, Faculty of Science, Chiang Mai, Thailand

Abstract— This study aimed to synthesis low temperature cement: Calcium Sulfoaluminate-Belite (CŜAB) using indus-trial waste as starting material viz., fly ash, bottom ash, and FGD-gypsum together with calcined clay. Commercial grade of Ca(OH)2 and Al(OH)3 are also used as corrective materials. The synthesis method was hydrothermal-calcination. The designed cement phases were calculated basing on Bogue equation. This study varied proportion of starting materials in order to obtain high level of ye’elimite phase and followed the strength development of the synthe-sized product. The main phases after synthesis were ye’elimite and anhydrite. Belite was also formed as a minor-ity. CŜAB was mixed with 20wt% of FGD-gypsum and 0.6 of water to solid ratio to study its hydration. The compres-sive strength was 22.9 MPa at 7 days. 

Index Terms—CŜAB cement, hydrothermal-calcination, industrial waste, ye’elimite, belite, ettringite

Cite: Maneerat Thala and Kedsarin Pimraksa, "Low Temperature Cement Synthesis: Calcium Sulfoaluminate-Belite from Industrial Wastes," International Journal of Structural and Civil Engineering Research, Vol. 9, No. 1, pp. 41-45, February 2020. doi: 10.18178/ijscer.9.1.41-45

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