Optimization of compositions of high-strength polymer-cement adhesive material using dry construction mixture technology

The article investigates the optimization of the composition of a high-strength polymer-cement adhesive material obtained by dry building mix technology and intended for the repair, bonding, and restoration of concrete and reinforced concrete structures [1, 2, 4, 9]. The optimization was carried out by the method of second-order mathematical planning of the experiment [3]. The contents of sand filler, acetone-formaldehyde resin, and sodium hydroxide were studied as variable factors [1, 3, 9]. A regression model describing the influence of the factors on the compressive strength of the adhesive material at the age of 28 days was obtained [3]. It was established that the optimal content of acetone-formaldehyde resin is 5 %, the degree of filling with sand is 50 %, and the NaOH content is 4 % of the resin mass [1, 3, 9]. The optimized composition provides a strength of more than 65 MPa and the required spreadability of the mixture according to the Suttard device [4, 5, 9].