INFLUENCE OF SUPERPLASTICIZERS МС POWER FLOW 3100 ON CALCIUM SULPHATE DIHYDRATE TECHNICAL PARAMETERS

Abstract

In recent years, there has been a decrease in gypsum products demand. Theimproving of gypsum binders properties can help to expand the scope of gypsum binders and, as aresult, increase gypsum products demand. The structure of the gypsum binder is the carrier of itsproperties. Studying the relationship between structure and properties is the way to directedelimination of disadvantages. One of the ways to eliminate the disadvantages is the modification ofsurfactants and nanoparticles, which affect and allow to control the hydration process. Therefore,the aim of the research is to study the effect of superplasticizer MC Powerflow 3100 on themicrostructure. physical and technical properties of calcium dihydrate formed during the hardeningof gypsum binder. The increase in the strength of gypsum binder at the compression of 77 percentand the bending strength of 17.6 percent was received during the research. Alsow the water-gypsumratio was reduced by 10 percent and the curing time was reduced: beginning from 5 to 2.5 minutes,end from 12 to 8 minutes. It was also found that the presence of the superplasticizer MC Plaflow 3100in the curing system of gypsum binder changes the process of hardening and crystal formation. Itaffects on the morphology of gypsum dihydrate crystals. To study the effect of the superplasticizer onthe morphology of gypsum dihydrate crystals, the crystals were grown in the presence ofsuperplasticizer MC Powerflow 3100 by the method of counter growth. When superplasticizer MCPowerflow 3100 is added to the solution, the thickening of crystals occurs and alsow their doublingwith the formation of dendritic crystals form. The performed researches can be the basis for thedirected management of material structure for the purpose of receiving the new improved indicatorsof gypsum binders properties that in turn will allow to expand scope of application of this material.