Evaluation Segregation of SMA-13 Asphalt Pavement by Compactness

Abstract

Segregation is one of the important reasons that cause the early damage of asphalt pavement, so it is of great significance to discuss the standard for evaluating segregation to control quality of pavement during constructing. SMA-13 specimens of different gradation segregation and aggregate-asphalt segregation are designed to discuss the effects of different levels of segregation on air voids and bulk specific gravity of SMA-13 Marshall specimen. And the classification standards for gradation segregation are established based on the test data with reference to the air voids range that proposed by United States. In order to recognize the levels and site of segregation quickly and accurately in the entity project, the ratio of bulk specific gravity and the theoretical maximum specific gravity of standard grading, that is the evaluation standard of compactness, is put forward as the evaluation standard for segregation of SMA-13 asphalt pavement in field test.