Research on the erosion of environmental pollutants on buildings in the coal mining areas

Abstract：Erosion of building by air pollutants is a serious problem, and the economic loss caused by air erosion accounts for fifty percent of the total loss.So it is significant to carry out researches of air pollutants erosion on buildings.Taking Pingdingshan as an example, air and rainwater (or snow) in mining areas was studied both in winter and in summer.SO2, NO2, HCl, Cl2, H2S, TSP and PM10 of the air, pH, SS, Cl-, dissociative CO2, CO2-3, HCO-3, NO-3, SO2-4, and F-of the rainwater or snow melt were tested.Effects of erosive gases in the air on the buildings were analyzed.Carbonization depth of the concrete was surveyed, and the status of the concrete components in the mining areas were tested by using non-disrepair testing technique.With X-diffraction, erosive products of concrete were analyzed, and the main influencing environmental factors were found.At the same time, the mechanism of building erosion was discussed, which offered references for the selection of building material in coal mining areas and the protection of building.

Keyword：coal mining areas;pollutants;buildings;erosion;