OPTIMIZATION OF ACCELERATED CARBONIZATION HARDENING EFFECTS OF EXPANDED CLAY CONCRETE

The paper examines the data obtained during the study of accelerated carbonization hardening of expanded clay concrete. The mechanisms and methods of carbonization hardening, the influence of recipe and technological factors on strength characteristics are considered. The most significant of them were the consumption of the binder, the relative amount and granulometry of the filler (ground limestone) and aggregate (keramzite), the concentration of the plasticizing additive (SYM) and the technological parameters of carbonization ‒ the maximum pressure and time of carbonization. The nature of the influence of the relevant properties on the strength characteristics is considered. The results of the planned and implemented experiment were studied using the methodology of response surfaces. Experimental-statistical models of compressive strength were built for 1 hour, 28 days and 180 days from the end of the carbonation procedure. The degrees of influence of various factors are determined. Constructed dependencies were displayed using a series of diagrams of isolines of strength at the limit values of three factors of weak influence. The proposed hypothesis is that in experimental-stati