Evaluation of the effectiveness of admixtures for dry building mixes with normalized indicators of adhesion strength to the base
Abstract
Evaluation of the effectiveness of admixtures for dry building mixes with normalized indicators of adhesion strength to the base
Incoming article date: 16.12.2021A method of selecting admixtures for the production of dry building mixes is proposed based on the results of an expert assessment of the complex indicator of the workability of application (connectivity, continuity when pulling with a toothed trowel, elasticity, quality of rollers) on a 100-point scale and the strength of adhesion to the concrete base, followed by the calculation of the specific cost of admixtures in the mixture per ton of products, respectively, by one point of workability of application and 1 MPa of adhesion strength, developed as a result of studies of adhesive mixtures made using 4 different cements, 5 water-retaining additives and 12 redispersible polymer powders. The possibility of obtaining adhesive compositions of adhesion class C 2 using redispersible polymer powders of domestic production is shown.
Keywords: dry building mix, adhesion strength to the base, unit cost, processability of application