The Effect of Porous Pozzolanic Polydisperse Mineral Components on Properties of Concrete

The role of polydispersity of zeolitic tuff in the realization of its properties as an active mineral addition and optimization of granulometric composition of concrete at the level of the mesostructure have been confirmed. The function of a polydisperse zeolitic tuff and perlite in the creation of water reserve for hydration of cement in conditions of reduced relative humidity and in case of improper curing is substantiated. In dry hardening conditions, concrete containing polydisperse mineral components such as perlite and zeolitic tuff are characterized by a slightly lower percentage of compressive strength reduction in comparison with concrete without additions. Flexural strength of moist cured concrete with polydisperse zeolitic component is 8 and 12% higher than concrete without additives at 28 and 90 days respectively.