Durability of Concrete in Nuclear Power Plants under Temperature Extremes

摘要

The paper inform about the results of the experimental analysis of the durability of concrete in laboratory of 3 nuclear power plants for various levels of heating at temperature up to 800 deg C and determination of heat transfer properties and of chemical behaviour. We observed also 3 other type of gravels for the high strength concrete at elevated temperatures. The analysis of the temeprature influences up to 800 deg C degrees into the decreasing of strength, Young modulus as well as strains included creep and shrinkage of various concrete will be shown in various diagrams. The kinetics concept of durability of hard bodys explain heterogeneous behaviour of concrete during heating under compression after heating.