STUDY ON DESIGN SPLITTING COEFFICIENT OF RECYCLED ASPHALT MIXTURE IN SNOWY COLD REGIONS

Abstract

 The Handbook of Pavement Recycling was revised in 2010. The revision includes a new mix design method for recycled asphalt mixtures, using design compression splitting coefficients. However, no design compression splitting coefficient is given for recycled asphalt with a penetration value of 80-100 (1/10 mm), which is the standard used in the Hokkaido region. For this reason, in the Hokkaido region, use of a compression splitting coefficient has not been promoted in either the design of recycled asphalt mixtures or the quality control of recycled aggregate. In this study, the compression splitting coefficients of a recycled asphalt mixture prepared by the existing mix design method using the design penetration value were measured in order to determine the design compression splitting coefficient. As a result, it was found that 0.25-0.40MPa/mm is an appropriate design compression splitting coefficient for recycled asphalt with a penetration value of 80-100 (1/10 mm).