Road Deicing Snow Melt Agent Key Evaluation Index And Test Methods Of Optimization Research

At present our country is using the path of snowmelt agent in the specification of the most representative to the national standard?Road deicing snow melting agent?(GB/T 23851—2009)and?Beijing local standards?(DB11/T 161—2012),after many years of pavement field use and indoor test found that the current specification on snowmelt agent key evaluation index,there are defects and shortcomings.In this paper,on the basis of the original specification,in the rules and regulations of the original test method of the key evaluation indexes are determined on the basis of,through the test data contrast analysis on the cause of the impact test error,to further reduce the test error,so as to achieve the aim of test method for optimization design,to our country current specification of snowmelt agent performance measurement method of modification.In this paper,the following four aspects are mainly studied in the following four aspects:(1)Road snow melt agent normative research status at home and abroad are introduced,and in view of snow melt agent at home and abroad are summarized the key evaluation index of the test method,find the existing road snow melt agent in the specification are still defects and deficiencies,summed up the effective testing methods for the situation in China,the snow melt agent able to use more formal management and science.(2)Studies of snowmelt deicing-determination of snowmelt deicing snow melt agent at home and abroad ability defects and deficiencies are analyzed,on the basis of the analysis put forward the snowmelt deicing snow melt agent ability to test the optimization of the test method,test method of optimization applications,explores the factors that influence efficiency of snowmelt deicing snow melt agent.(3)The determination of concrete frost damage evaluation index-existing specifications in our country so far has no proper evaluation standard of concrete frost damage,but the technology is commonly used in standard measurement method for the following: 1)by observing the exterior morphology;2)determination of quality loss;3)determination of strength loss;4)move modulus.These evaluation indexes are not accurate in the description of the characteristics of concrete salt freezing cycle destruction,and there are some problems.Combined with the original specification put forward evaluation index,determined by a new test method,test research and analysis all kinds of evaluation indexes,finally put forward a kind of in line with the concrete evaluation index of circular damage.(4)The study of snow melt agent road surface friction damping ratio by the friction test of friction pendulum instrument,respectively measured under the condition of room temperature and low temperature resistance value,under the condition of low temperature measured resistance value,analysis the condition of room temperature and low temperature conditions snowmelt agent attenuation rate of the differences between the road surface friction;The influence of wet basic bottom,test temperature,type of snow melt agent and the concentration of snowmelt agent on the friction attenuation rate of pavement were further analyzed.Which can accurately reflect the different influence factors under the condition of road surface friction attenuation law of snowmelt agent,to our country current specification on road surface friction damping ratio determination method of modification.