Optimum compositions of crack-stability and waterproof concrete for the reliably and durable constructions of bridges

Abstract

Heavy concretes of high class on strength, which are used for bridges and other constructions, are often characterized by the promoted deformation of long-term creep. A long-term creep develops during the tens of years and results in impermissible deformations of constructions, which are exceeding norms. Such deformations were detected in Europe in the long spans of reinforced concrete bridges. The authors of report detected such deformations in the thin-walled container structures and other buildings. As a result of theoretical and experimental researches dependences of indexes of long-term creep are set on characteristics of composition of concrete. There were worked out and patented a method of determination of composition of crack-stability and water-unpermeable concrete.