Research About Deterioration Mechanism And Prevent Practice Of The Deicing Salts On Concrete Pavement

During winter, in order to secure smooth traffic, avoid the accident lead by ice and snow pavement, we normally put deicing salt on the road and bridge pavement, so that to make the ice and snow thaw through lower the freezing point. There are many kinds of deicing salt on the current market, and most of them mainly made up of NaCl and CaCl₂ which are inorganic salt: however, by primarily application of Chlorine as the deicing salt, it will lead serious denudation of concrete, the deterioration is much more bigger than the deterioration under the general freezing and thawing condition or the other kinds of deterioration, thus influence the age of road and bridge concrete seriously.This article base on the research of deicing salt to concrete's deterioration mechanics, has studied the concrete with different water-cement ratio, porosity and mixed material such as fly ash, the influence on road concrete anti-salt frost performance and permeability of Cl^-; Made up the anti-deicing salt concrete, and carried on the test to its mechanics performance and the durability.Anti- deicing salt's frost resistant has remarkable improvement compare with the general concrete through the inside experiment, it can reach more than 300 times lab freezing and thawing cycle, loss of mass is no more than 2.5%, relative dynamic modulus of elasticity is no less than 91%, Cl^- osmolity is no more than 11mm. There is very good instruction significance in construction of the cold area highway, it can provide the experience of making the design standard of road concrete anti-salt forst for our country as soon as possible.