THE EFFECT OF MAN-MADE MICROFILLERS ON THE STRENGTH OF ADHESION TO THE BASE OF THE SOLUTION OF THE DRY CONSTRUCTION MIXTURE

Abstract

Purpose. The study consists in increasing the adhesion of a cement-based dry mortar to a concrete base by modifying the composition with microfine waste from industrial production. When using microfine fillers of technogenic origin, the cost of production should decrease, the energy efficiency of production will increase, and the technogenic impact on the environment will decrease. Methodology. The study of dry mixtures for the installation of poured floors was carried out in accordance with DSTU B V. 2.7-126:2011 "Modified dry construction mixtures. General technical conditions". The basis was a cement-based dry building mix with the composition: cement, quartz sand, plasticizer, Bermocoll cellulose, redispersed copolymer powder. As modifiers: sludge from the wet gas cleaning of the ferrosilicon production of the Zaporizhia Ferroalloy Plant, water softening sludge from the Kharkiv Heat and Power Plant, expanded clay dust from the Kharkiv expanded clay plant. Findings. The dependence of the strength of adhesion with the base of the samples on the amount and type of microfillers of technogenic origin has been established. The effect of water softening sludge and expanded clay dust on the strength of adhesion to the base is analyzed. Originality. The impact of incorporating microdispersed fillers such as wet gas desulfurization sludge from ferrosilicon production, expanded clay dust, and water softening sludge into a cement-based dry construction mixture for self-leveling floors has been studied. Practical value. The use of industrial waste in warehouses of dry construction mixes for bulk floors helps to simultaneously reduce the harmful impact on the environment by industrial enterprises and increase the mechanical and economic indicators of cement mortars. When adding expanded clay dust and sludge from wet gas cleaning of ferrosilicon production, the contact zone between the solution and the concrete base increases. As a result, the adhesion strength of the solution to the base increases.