Study On OGFC Gradation Regulations And Pavement Performance

Since OGFC was introduced into our country in 1988s, it has already become one of the primary bituminous mixture types in our country after research and promotion. Because of the difference between OGFC and general asphalt concrete, it is very important to select and apply the reasonable graduation of OGFC to ensure the Skeleton Dense Texture characteristics and excellent road performance of OGFC.In this paper, we accomplished the statistics on the performance index of three kinds of commonly used construction materials (basalt,diabase,granite) according to the practical application conditions, and researched the application of OGFC material in different regions of our country, and to analyze universal regulations of OGFC material in various regions.At the same time, we collected the data of application of OGFC-16 and OGFC-13 in different periods and regions in our country since 1996 , analyzed the differences of key sieve and researched the characteristics of OGFC grading in different regions of China. According to the application of OGFC mixture in different periods, the development features and rules of OGFC grading are researched. The research indicates that the obvious changes in OGFC-16 applications from initial stage to present stage. Then, the common characteristics of OGFC are proposed in present stage of China.Based on the above research, we also studied the relationship between OGFC-13 grading with different lithology and pavement performance of mixture, as well as porosity and pavement performance of mixture. The results showed that the influences of pass ratio through 4.75mm sieve has important significance for the pavement performance of mixtureWith the above investigation and research, we selected the optimum aggregate grading for test, and analyzed the effect of OGFC-13 graded mixture on pavement performance by way of adding different doses of lignin fiber and rubber powder(separately using the dry process and wet process) .