Investigation of the Role of Potassium Sulfate in the Design of a Hardening Activator

The article is devoted to the study of the possibility of structure control during the modification of anhydrite systems. The study of insoluble anhydrite hardening activators and accelerators will make it possible to expand the possibility of using anhydrite in the production of construction products and materials. The dependences of the setting time and the compressive strength of three types of modified binder were studied: firing anhydrite binder, synthetic anhydrite binder, natural anhydrite binder on the content of K₂SO₄. The conducted studies have shown that the addition of potassium sulfate accelerates the hydration of anhydrite binders and leads to a set of compressive strength of hardened samples. The physical and technical characteristics of binders depend on the amount of the K₂SO₄ additive being introduced and on the type of anhydrite binder. For further study, potassium sulfate in the amounts of 1 and 2% was adopted as the basic hardening activator

A.F. BURYANOV¹, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
H.-B. FISHER², Doctor-Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.);
N.A. GAL'TSEVA¹, Candidate of Sciences (Engineering), (This email address is being protected from spambots. You need JavaScript enabled to view it.),
E.N. BULDYZHOVA¹, Engineer, (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)
² Bauhaus-Universität Weimare (Coudraystraβe 11, 99421 Weimar, Deutschland)

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