ASSESSMENT AND FORECASTING MAXIMUM CARBONIZATION OF CONCRETE
The article substantiates the need to study the carbonation of concrete and evaluate the maximum carbonization of it. The basic equation of prediction of change in time by concrete cross section of carbonate component of cement-sand fraction of concrete is given. An expression is proposed for estimating the limit value of concrete carbonation (PVC). PVC from concrete composition (amount of used cement) for concrete without additives, compressive strength classes C<sup>8</sup>/<sub>10</sub>-C<sup>50</sup>/<sub>60</sub>, mixture compositions, grades for ease of laying P1...P5 and G1...G4 for each class of concrete in terms of compressive strength and different tempering strength of concrete was investigated. The obtained PVC values were analyzed. Dependencies of PVC change on the amount of used cement for any class of concrete in terms of compressive strength and different grades of mixtures in terms of ease of laying, as well as dependence of change of limit value of carbonization of non-addition concrete on the amount of used cement for different tempering strength of concrete and grades of mixtures in terms of ease of laying are obtained.