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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Hydration Properties of Calcium
Sulfoaluminate-Portland Cement Blends
Author(s): M. Bianchi, F. Canonico, L. Capelli, M.L. Pace, A. Telesca, and G.L. Valenti
Publication: Special Publication
Appears on pages(s): 187-200
Keywords: calcium sulfoaluminate; early hardening; ettringite; expansion; shrinkage compensation.
Abstract:The X-ray diffraction analysis and mercury intrusion porosimetry were
employed to investigate the hydration process of calcium sulfoaluminate (CSA)-
portland cement blends with C4A3S mass concentration, C3S/C4A3S, and CS/C4A3S mass ratios ranging from 7.7 to 22.0%, 1.0 to 6.5, and 0.5 to 1.2, respectively. Owing to the hydration of adequate C4A3S contents and the generation of sufficient quantities of expansive ettringite, blends with C4A3S amounts as well as C3S/C4A3S and CS/C4A3S values comprised between 17.6 and 22.0%, 1.0 and 1.7, 0.5 and 1.0, respectively, showed high-early strengths and low drying-shrinkage when compared to normal portland cements. The formation of expansive ettringite was associated with concentrated pore distributions and most preferred pore radii ranging from either 47 to 225 or 367 to 896 nanometers, depending on both C3S/C4A3S and CS/C4A3S ratios.
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