Determination of temperature course in concrete during hydration

Abstract

Durability of the concrete responds very close with the microstructure - cement stone microstructure. Each crack in a concrete microstructure very strongly decreases mechanical properties and durability of final concrete structure. Determination of temperature course in concrete structure during hydration and estimation of possibility for cracks inception is possible through modeling.
Hydration heat liberation is dependent on type and amount of cement, additives, and chemical admixtures. For most of modern concretes, is used relatively high amount of chemical (plasticizing) admixtures for improvement of their properties and decreasing of binder amount. These admixtures significantly influence hydration heat course and from the point of view of determining temperature course in concrete during hydration, it is necessary to know co-reaction of binder and chemical admixtures.
On basis of prediction of concrete massive temperature, it is possible to change the material amount of a concrete mixture by carrying out the choice of optimum chemical admixture and amount of binder. By means of such a process, it is possible to reduce risks of crack creation for concrete structures efficiently and so that to increase final properties and their durability.