Combined effect of repeated loads and low temperatures on asphalt pavements

Abstract

This research was undertaken to study the combined effect of repeated vehicle loads and low temperatures on the design thickness for both recycled and virgin asphalt pavements. It included three parts of work: theoretical analysis, laboratory tests, and computation. In the theoretical analysis, the finite layer method was used instead of the conventional layered theory to obtain the relationship between vehicle loads and the mechanical parameters in the pavement layers. In the laboratory tests, the behaviour of a recycled asphalt concrete mix consisting of 42% reclaimed and 58% new material was compared with that of a virgin asphalt concrete mix of similar characteristics. Finally, a computer program FPAVE was developed to determine the pavement thicknesses directly and conveniently. These thicknesses were then plotted in the form of curves for comparing the two types of pavements as well as for comparison with the thickness at 22 °C. Key words: asphalt pavement, fatigue, pavement design, recycling, temperature.

Quantifying Traffic- and Temperature-Induced Fatigue Damages of Asphalt Pavement

“…Fang and Sargious [13] evaluated the combined effect of repeated loads and low temperature on asphalt pavement's performance using laboratory indirect tensile strength test. The researchers conducted cyclic tests on an asphalt sample at various temperatures (−10 to 22°C) and concluded that fatigue damage is critical for greater temperature, i.e., 22°C.…”