Effect of particle size distribution on the pre-hydration, hydration kinetics, and mechanical properties of calcium sulfoaluminate cement

Journal article (2023)

Authors

Leyang Lv Shenzhen University
Shitao Luo Shenzhen University
B. Šavija Materials and Environment - CEG
Hongzhi Zhang Shandong University
Lin Li Saint-Gobain Research (Shanghai) Co. Ltd.
Tamon Ueda Shenzhen University
Feng Xing Shenzhen University
Research Group
Materials and Environment (CEG) (TU Delft)
Copyright: © 2023 Leyang Lv, Shitao Luo, B. Šavija, Hongzhi Zhang, Lin Li, Tamon Ueda, Feng Xing
DOI: https://doi.org/10.1016/j.conbuildmat.2023.132497
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Published Date

2023

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Materials and Environment

Abstract

The particle size distribution (PSD) has a significant influence on the fresh and final properties of cement and its derived products. In this paper, CSA cements with three different mean diameters (D50), ranging from 6.04 to 26.62 μm were prepared by milling. The pre-hydration behavior was quantitatively analyzed, including the degree of pre-hydration, the dynamic change of mineral assemblage and the morphology of the prepared CSA cement exposed to 57%, 75% and 97% relative humidities (RHs) for up to 90 days. Hydration kinetics, porosity, and compressive strength of the cement paste made with fresh and pre-hydrated CSA cement with different PSD were also characterized. The results show that pre-hydration of CSA cement at RH higher than 75% has detrimental effects on the hydraulic activity and strength gain of CSA cement. However, coarser CSA cement (D50 = 26.62 μm) does not only show better resistance to pre-hydration, but also higher compressive strength and lower porosity.

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