Changing the structure of concrete after exposure to frost

Abstract

Concrete testing can be done at micro, mezzo and macro level. Tests at the macro level are the most common and are the ultimate engineering approach, and include testing and comparison of quantities such as commpresive strength, modulus of elasticiti and the like. In this manner you can determine changes in structures of concrete. To be considered during the examination and the file structure of concrete should be seen as concrete material composed of cement stone and aggregate, that is switch to a lower level of analysis – mezzo level. Concrete exposed to freezing changes its characteristics both in terms of strength and in terms of the structure. The aim of this study is to determine how to modify the structure of the concrete after frost action. Changing the structure of concrete was evaluated qualitative and quantitative analysis of pores using a device RapidAir 457.