THE DEPENDENCE OF PHYSICAL-MECHANICAL CHARACTERISTICS OF CEMENT ON FLY ASH ORIGIN UDC 666.943.2

Abstract. The paper presents the results of an investigation of the potential to use the fly ash as a component of cement mixtures. For this purpose, fly ash from 3 locations has been chosen: from Kragujevac (LP1), Svilajnac (LP2) and Vreoci (LP3). The research was conducted by making cement mixtures with the portions coming up to 10, 20, 30 and 50 % of each mentioned type of ash. The physical-mechanical characteristics of the cement mixtures created in this way have been determined. On the basis of the obtained experimental results, the maximum content of fly ash in the cement mixtures has been determined. Also, the areas where the individual mixtures can be optimally applied, depending on their setting time, have been determined