Journal of the Korean Asphalt Institute ISSN:2234-0785(Print) 2635-9553(Online) 한국아스팔트학회지

This study conducted flexural beam test of high viscosity asphalt binder for porous asphalt pavement to classify the characteristics. 7 types of PG 82-22 high viscosity asphalt binder and 7 types of PG 82-28 high viscosity asphalt binder were prepared and 6 sample per 1 specimens were made for test. Flexural beam test were performed at –20°C and the criteria of the JMAA (Japan modified asphalt association) were applied. The results of the flexural beam test of PG 82-22 specimens, some samples did not satisfied the criteria and The bending energy and bending stiffness measured for each specimen were different. All other specimens of PG 82-28 were satisfied with the crieteria, except for one specimen, confirming that the low- temperature grade was improved. The correlation between flexural energy and flexural stiffness was expressed as a quadratic function. In case of PG 82-22, the function which between flexural energy-flexural stiffness is y=0.00002x²–0.01x+1.5837 and R²–value is 0.8063. In case of PG 82-28, the function which between flexural energy-flexural stiffness is y= 0.0001x²+0.0198x+0.434 and R²–value is 0.7162. Through the bending test, it was confirmed that the flexural energy and flexural stiffness characteristics were different even with the same PG grade.