The monograph presents the results of theoretical and experimental studies on the development of scientific bases of optimal design of composition of complexly modified gypsum concretes with binary filler. The monograph presents the results of complex research on the study of structure formation processes and properties of composite gypsum binder modified with superplasticizing additives, development of compositions and study of properties of composite gypsum binder with polycarboxylate superplasticizer and binary filler consisting of ground steelmaking slag and TPP fly ash, as well as gypsum concrete on its basis. The monograph is intended for scientific and engineering workers of research, design and construction organizations, as well as for doctoral students, masters and students of universities of construction specialties.