Study on Smog Eating Buildings

Study on Smog Eating Buildings

Author Name : S. Naveen, Dr. K. Chandramouli, J. Sree Naga Chaitanya

ABSTRACT

Smoke fog, or smog for short, is a type of intense air pollution. This kind of visible air pollution is composed of nitrogen oxides, sulphur oxides, ozone, smoke and other particulates. It is mainly derived from coal combustion emissions, vehicular emissions, industrial emissions, forest and agricultural fires and photochemical reactions of these emissions.  It is common in big cities with a lot of industry and traffic. So, there is a need of special engineering material that would neutralize the pollutants that cause smog. Thus, smog eating concrete comes into existence for tackle the smog emission problems in urban areas. These properties induced in cementitious material were mainly due to the photo catalytic action of TiO2, which under the influence of sunlight acts as a catalyst and triggers chemical reaction due to that decomposition of dirt particles take place on the concrete’s surface, also it reacts with certain pollutants that contribute to smog, breaking it under the presence of sunlight and accelerating their natural oxidation process. It is found that it is very effective against the Nitrogen oxides (NOx), Sulphur oxides (SOx) and many other harmful pollutants, which are mainly released due to the burning of fossil fuels and is one of the major constituents of smog. In this paper, we shall discuss about the smog eating mechanism and its application in buildings, pavements, roof tiles and other miscellaneous structures.

Keywords: Smog, NOx and SOx gases, photocatlyst, TiO2.