Abstract
The article discusses the possibility of obtaining composite gypsum binders (СGB) for 3D additive construction technologies. Carbonate-siliceous rock - opoka-like marl (OM), which contains X-ray amorphous substances that determine its hydraulic activity when interacting with Ca (OH) 2 with the formation of low-basic calcium hydrosilicates and other neoplasms, is proposed as an active mineral additive, compacting the micro structure of the hardening matrix and, as a result, increasing the stability of the compositions. The main characteristics of the opoka marl are given. The processes of structure formation of the SHG have their own characteristics. With the participation of OM, Ca (OH) 2 is bound and removed from the reaction sphere. The hydrolysis of clinker minerals is accelerated, while the number of low-basic calcium hydrosilicates of the CSH (B) type increases, which positively affects the initial strength of the hardened CGB.
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