About influence of redispersible polymer powders on the modulus of elasticity and bonding strength of building mortars
Abstract
About influence of redispersible polymer powders on the modulus of elasticity and bonding strength of building mortars
Incoming article date: 11.06.2022As a result of processing the experimental data of the authors and other researchers, a relationship was obtained between the adhesion strength of the Acc with a concrete base and the axial tensile strength Rt of solutions without RPP Acc = 0.23ˑRt at R2 = 0.996. A tendency to increase the adhesion strength to 30% with an increase in the dosage of RPP to 2% and up to 130% with the dosage of RPP 3%, while a significant effect on the adhesion strength of the type of cement and RPP has been established. The data on the role of the age of the concrete base and its treatment before applying a repair (restoring) mortar or concrete mixture on the adhesion strength are given. The dependence of the elastic modulus of mortar or fine-grained concrete on the axial tensile strength, invariant to prescription factors, is obtained. The discrepancy of some standards in terms of the requirements for the base during tests for adhesion strength was noted.
Keywords: dry building mixes, adhesion strength, modulus of elasticity, redispersible polymer powders, repair mixes