A reaction range for hydration of calcium sulfoaluminate with calcium sulfate and calcium hydroxide: theory and experimental validation

Author:

Chang Jun1,Yu Xin2,Shang Xiaopeng2,Zhao Jiuye2,Zhang Yangyang2

Affiliation:

1. School of Civil Engineering, Dalian University of Technology, Dalian, China (corresponding author: )

2. School of Civil Engineering, Dalian University of Technology, Dalian, China

Abstract

To better investigate and understand the hydration of calcium sulfoaluminate (CSA) cement, a theory reaction range for the hydration of CSA with calcium sulfate and calcium hydroxide was established by theoretical calculation with a hypothetical hydration reaction system. With different amounts of calcium sulfate and calcium hydroxide in the reaction systems, their hydration processes, hydration products and stoichiometric water/solid ratios showed regular changes. A preliminary experimental validation was made by analysing the hydration products (curing time 28 d and water/solid ratio of 10) of several composition points in the theory reaction range by means of x-ray diffraction and thermogravimetric analysis. The process for calculation of the theory reaction range and some of the experimental validation results are presented in this paper.

Publisher

Thomas Telford Ltd.

Subject

General Materials Science,Building and Construction

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