Study On Material Composition Design And Pavement Performance Of Cold Recycled Road Base Material

In recent years, with investment in the country under the background of economic growth, infrastructure investment is. The highway mileage increases year by year, as of the end of 2014, the national highway traffic mileage reached 111450 kilometers. With the unprecedented expansion of highway construction, built in the early highway, more and more has reached the period of maintenance, successively has entered the phase of maintenance and change and expansion. The cold regeneration construction technology with its save resources, reduce the project cost, can quickly open the traffic characteristics, on the road reconstruction project has a good application value and development potential. But in practice, less related guide specifications.Road construction site cold regeneration in Guizhou province more than, this paper first analyzes the S305, G326, S102 every way the technical properties of road base materials. Including the different sections of the recycled aggregate gradation, the physical and mechanical performance of coarse aggregate, fine aggregate, physical and mechanical properties and performance of concrete. To grasp the old material gradation variability, are calculated by the mesh screen residue percentage variation coefficient.After mastering the technical nature of raw materials, for 7 d unconfined compressive strength index of cold recycled mixture composition design, respectively. Use from Guizhou Tongren region and Bijie prefecture of Guizhou recycled aggregate, draw lessons from the two new materials added way for cold recycled mixture composition design, respectively. Two new materials added way for cold recycled mixture composition design, respectively. In cold recycled mixture 7 d unconfined compressive strength, In cold recycled mixture 7 d unconfined compressive strength, on the basis of further evaluation mixture performance parameters, including the development regularity of unconfined compressive strength, two new materials added way for cold recycled mixture composition design, respectively. In cold recycled mixture 7 d unconfined compressive strength, cleavage strength and unconfined compressive strength of the correlation and the changing rule of the compressive modulus of resilience.Finally, in understanding the performance of raw materials and the mixture strength, stiffness, on the basis of further research on the fatigue property of cold recycled mixture, establish don’t match at the same level of cold recycled mixture fatigue equation, evaluate its sensitivity and fatigue life of fatigue.