Modification of Binders Based on Calcium Sulfate with Complex Additives

The study of the effect of complex additives on the properties of gypsum binders is presented. Such additives as diabasic flour, metallurgical slag, and Portland cement were used in the work. It was revealed that as a result of physical and mechanical tests, modification of gypsum binder with a complex additive consisting of diabase (0.1%) and Portland cement (1%) showed greater efficiency in increasing the strength characteristics of the material. The increase in compressive strength for 28 days was 23% compared to the control composition. The introduction of metallurgical slag (0.2%) into the gypsum binder in combination with Portland cement (3%) resulted in an increase in compressive strength by 19.2% compared to the control sample. Physical and chemical studies of modified materials show that when complex additives are introduced in the structure of materials, new growths are formed on the basis of hydrosulfoaluminates (when diabasic flour is introduced) and calcium hydrosilicates (when metallurgical slag is used), which lead to additional binding of gypsum crystalline hydrates and compaction of morphology, which improves the mechanical properties of the matrix.

N.S. RUZINA, Master (graduate student) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
G.I. YAKOVLEV, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.F. GORDINA, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
G.N. PERVUSHIN, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
Yu.A. SEMENOVA, Student (This email address is being protected from spambots. You need JavaScript enabled to view it.),
E.V. BEGUNOVA, Master (graduate student)

Kalashnikov Izhevsk State Technical University (7, Studencheskaya Street, Izhevsk, 426069, Russian Federation)

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