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Characteristics of Asphalts as Related to the Performance of Flexible Pavements
Douglas I. AndersonDale E. PetersonMax Wiley
其他書名
Final Report
出版Utah Department of Transportation, Materials and Research Section, Research and Development Unit, 1976
URLhttp://books.google.com.hk/books?id=boQf3ZXaAwQC&hl=&source=gbs_api
註釋Pavement cracking and related distress are the major problem with Utah highways. This study was initiated to isolate the causes and propose solutions to this problem. The most significant factor influencing transverse cracking was found to be the source of asphalt crude. This difference in asphalt performance was found to be related to the parameters temperature susceptibility, Force Ductility, ductility, aging index, chemical composition, and cannon cone viscosity. The viscosity and penetration grading methods were found to be inadequate in controlling pavement cracking. The longitudinal cracking was related to accumulated 18-kip loads, temperature susceptibility, and percent asphalt. Map cracking was significantly defined in terms of accumulated 18-kip loads, temperature susceptibility, and pavement age. The high level of air voids content (7.1%) was found to cause a more rapid hardening of the asphalt binder than the low level of air voids (2.6%). Asphalt hardening in the Rolling Thin Film Circulating Oven was found to not be representative of the field aging of the asphalts.