Research Of The Snow-melting Agent For Roads Friendly To Environment

After it snows in winter in the North, it is very important to clean up the snow in time to guarantee traffic unimpeded and safe. Especially in the cities like Harbin, solving this problem seems more pressing.In the past the snow is cleaned up by manpower and machines, which, however, cannot meet the demands of modern traffic development nowadays. So the chemical snow-melting agent has been known and used step by step. Made up of sodium chloride, calcium chloride and the compound as the primary ingredients, the snow-melting agent has attained the object of clearing snow, but it has been extremely harmful to roads, greenbelts, bridges, especially to large rivers, etc. and seriously polluted the environment.According to the analysis about the snow-melting agent by practice, the expert concluded that the chloridion in salt is the real "murderer" who damaged the environment. It is chloridion that corrode the steel reinforcing bar in concrete, corrode the chassis of automobile, shorten the service life of tires, make the roads aging, fissure, and damages, even kill the plant alongside the road, pollute rivers and human source of water. Today, more and more attention is being paid to protect the environment, thus people are pressingly looking for a snow-melting agent that is friendly to environment on road and can melt snow better, make less pollution, and can be used conveniently.The thesis studies the snow-melting agent by using the salt of calcium magnesium acetate as the primary ingredient, discusses the selection of the raw material, the ratio of calcium oxide with magnesium oxide, the temperature of the reaction, the effect of the additive on the melting snow and discusses deeply the analytical methods of the various index in the product. Through the test of the melting snow, we find that it has attained a basic demand of the environmental protection, thus it can be used as a better snow-melting agent for the purpose of the environmental protection.The conclusion is that the reaction temperature of the synthesizing calcium...