Influence of Additives in M400 Cements on Strength of Concrete with BERAMENT A2 Admixture at Early Age

The results of experimental studies of the strength of concrete with the BERAMENT A2 additive based on melamine compounds aged up to 28 days based on M400 cements of the second group with mineral additives up to 40% produced by Kryvyi Rih Cement, Mykolaiv Cement, Podilsky Cement, Ivano-Frankivsk Cement plants, modified with the BERAMENT A2 additive are presented. The strength of concrete was determined by testing cubes for uniaxial compression at the age of 1, 7 and 28 days. Tables of the strength gain of concrete with different doses of additives (0.6; 1.2; 1.8; 2.4%) by weight of cement are given. A comparison was made of the rates of strength gain of concrete using domestic M400 cement and Rohoznik cement (Slovakia) depending on the amount of additive. Based on the conditions for ensuring the required hardness of the mixture, the upper and lower limits were established, as well as the optimal dose of the additive for each of the cements, which had mineral additives of up to 40%.