Effect of Segregation on Hot Mix Asphalt Using the Asphalt Pavement Analyzer

摘要

Segregation of hot mix asphalt is a recurring problem in the paving industry.There is little documented research that quantifies the effects of segregation on mix properties and performance. The Asphalt Pavement Analyzer (APA) is a new class of pavement testers available to evalute pavement performance. The APA can evaluate the rutting potential moisture susceptibility and fatigue life of bituminous mixtures. Materials were available from a previous study (K-TRAN: KU-96-6) on segregation for use in evaluting the use of the APA with Kansas mixtures and materials. Two surface mixes, a BM-1B and BM-2, were fabricated to different levels of segregation as determined in the K-TRAN: KU-96-6 study. The mixtures were tested in the APA for rutting, moisture damage and fatigue life. The APA was shown to be an effective tool for evaluating the rutting potential and moisture damage potential of bituminous mixtures. The results of the fatigue life evaluations were inconclusive as the fatigue life of all mixtures exceeded 1,000,000 load cycles.