| Abstract Scope |
Gypsum is a typical early strength, fast hardening, low-energy consumption gas hardening cementitious material, while cement is a typical hydraulic cementitious material. The effective composite of two types of cementitious materials can solve the problems of low strength, poor water resistance, and high energy consumption of cementitious materials. In this study, our focus was on addressing the issues of poor volume stability in gypsum-cement based composite cementitious materials. The research explored the factors that influence the volume stability of these materials and aimed to develop gypsum-cement based composite cementitious materials with consistent performance. Through optimization and enhancement of the adaptability and compatibility between various additives, lightweight-fillers, and gypsum-cement based composite cementitious materials, as well as improvements in particle size distribution, we were able to effectively control the volume stability of materials. This approach led to the development of high-performance and volume-stable gypsum-cement based composite mortar. |