Effects of Segregation on Mix Properties of Hot Mix Asphalt

摘要

This study was conducted on four newly constructed pavements which had noticablespots of segregation. Cores were obtained from both segregated and non-segregated sections of the four pavements. The unit weights of the pavements were determined using a thin-lift nuclear gauge. The change in gradation on the 4.75 mm sieve was compared with asphalt content, nuclear gauge unit weight, core unit weight, and macro texture to determine if an indicator test could quantify segregation. The cores were tested for moisture sensitivity, fatigue life, and indirect tensile strength to determine the effect of segregation on performance. The results indicated that asphalt content was the best indicator of segregation and macro texture the best nondestrucive indicator of segregation. Core unit weight is the best indicator test to predict pavement performance.