Preparation and Properties of Sulphoaluminate Cementitious Materials with Low Alkalinity

Abstract:

The influence of anhydrite on mechanical property and alkalinity of sulphoaluminate cement clinker was investigated. The alkalinity was examined by mixing powdered samples with a solvent and measuring the pH of the suspension. The hydration mechanism was analysed by XRD analysis. The results indicated that with the increase of anhydrite addition, both the alkalinity and compressive strength decreased. Yeelimite completely converted into ettringite with the dosage of anhydrite reaching to 50% by weight of the paste. With the dosage of 30%, the 7 d pH could be reduced to 10.43 while the 7 d compressive strength was 48 MPa.

• Periodical: Applied Mechanics and Materials (Volumes 174-177)
• Pages: 1164-1167
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.174-177.1164
• Online since: May 2012
• Authors: Xiao Bo Yan, Ling Chao Lu, Chen Chen Gong, Shou De Wang
• Keywords: Anhydrite, Low Alkalinity, Sulphoaluminate Cement Clinker

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