Northwest Highway Natural Climatic Zoning And Its Impact On The Technical Standards Of Road Construction Materials Research

My paper firstly describes the nature and weather characteristics of northwest region, and then have analyzed and established indexes of climatic region charts for bitumen road. On the basis of it, I work out third class region charts for bitumen road in northwest region in china.To the question of indexes of the partition—temperature and their affects on road materials, I give out the main criterions of bitumen mixture which are used in constructing road in northwest regions. In the improvement methods, the shear resistance that come from coarse aggregate gradation have been discussed in the paper, which makes the function of aggregate gradation in the asphalt mixture clear. All of those are benefit to turn the experience design method of asphalt mixture to measurable method.Aiming at climatic features of northwest regions, the paper have discussed criterions of geo-synthetica materials under the climatic element—temperature, sunlight intension in the northwest regions. Aging mechanism and improvement methods have been given out.Aiming at soil features of northwest regions, affects on geosynthetica material coming from acid or alkali degrees, water and chemical elements including heavy mental have been discussed.After discussing affects coming from soil and climate, the paper creatively advanced methods to deal with weld damage of geogrid through fine-plaited geogrid. In the paper I also bring forward to tackle with grip problems between synthetic material and steel wire. The method is to replaced the steel wire with twisted steel wire or fiber. In the paper I commend to strengthen some criterions of geothyntica materials according to fact road project. All the problems can been solved by dimension domino affect, pre-strain, adding antioxidant and sunligt-shield materials.