The role played by deicing chemicals in the deterioration of reinforced concrete is addressed in this paper. Several newer and faster bench-scale methods of study and materials evaluation are described and compared to the astm recommended techniques. The difference infreezing temperatures between concrete pore solution and an outsidedeicer solution is shown to be one of the important factors in the spalling process. The importance of an anisotropic character of freezing zone is outlined. The macrocell corrosion mechanism of rebar deterioration has been studied in the laboratory environment using specially constructed mini slabs. The results were correlated with previously conducted microcell corrosion studies of small encapsulated rebar probes. This paper appears in transportation research record no. 1157, Deicing chemicals and snow control.
Samenvatting