Open AccessGAS-GYPSUM MATERIALS PROPERTIES MODIFIED BY PLASTICIZING AGENTS
Author(s) -
L. A. Anikanova,
Anna Kurmangalieva,
О. В. Волкова,
D. M. Pervushina
Publication year - 2020
Publication title -
vestnik tomskogo gosudarstvennogo arhitekturno-stroitelʹnogo universiteta
Language(s) - English
Resource type - Journals
eISSN - 2310-0044
pISSN - 1607-1859
DOI - 10.31675/1607-1859-2020-22-1-106-117
Subject(s) - superplasticizer , gypsum , materials science , anhydrite , porosity , mortar , plasticizer , composite material , chemical engineering , compressive strength , engineering
The paper deals with porous gypsum building materials having heat-insulating properties and applied in low-rise building construction, in the manufacture of flat and room dividers. Anhydrite of the Siberian Chemical Combine together with sodium carbonate is used as a gas-forming component. To regulate the plasticity of the mortar mixture, the Steinberg MP-4 and Steinberg PR-1S(A) superplasticizers are introduced into the composition, and their effect on the porous gypsum mixture properties is studied. The analysis of the superplasticizer influence on the properties shows that the use of the Steinberg MP-4 with the amount of 2 wt.% of gypsum is optimum to achieve high strength of up to 27 MPa, while providing high mobility of the porous mixture. The main role of superplasticizers in a gypsum water-soluble composition is to increase the ξ-potential of the material and to reduce the water-gypsum ratio of the mixture while maintaining its mobility. The effect of superplasticizers largely depends on the initial modification of the binder, its dispersibility and mobility.