Technological Aspects of Ensuring the Frost and Salt Resistance of Concrete Pavements

The resistance of concrete pavements against frost and salt is ensured by creating the necessary volume of finely-dispersed air voids in the concrete by entraining air during the mixing process with appropriate admixtures. The influence of various structural and technological factors on the stability of entrained air and the formation of air porosity in concrete has been investigated. Some technological methods to ensure the frost resistance of concrete pavements are presented in this paper. Data on the influence of the concrete mixing and the hardening temperatures on porosity are also given.