Mathematical model of the air bubble change in concrete items producing

Abstract

Mathematical model of air bubble size dependence, located in the mixture during its compression under concrete items manufacturing, on the depth of immersion, total pressure value of the load and mixture density has been developed in the article. It has been shown that total pressure increment of the load of 1*10^5 Pa for mixtures with density of 1900...2500 kg/m3 insignificantly influence the change (5 %) of air bubble volume ratio on the surface of the mixture to the value of air bubble volume on the depth of 0,5m.