Road performance evaluation of glass fiber steel slag PAC-13 asphalt mixture

• 1、School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, China

Abstract：In order to study the indoor road performance of glass fiber steel slag drainage asphalt mixture, steel slag was used to replace 60% of 4.75-16 mm coarse basalt aggregate by volume method, and the optimal asphalt content of asphalt mixture was obtained by raveling test and draindown test. The road performance test of asphalt mixture with glass fiber dosage of 0, 0.1%, 0.2% and 0.3% was carried out with 9 mm length of glass fiber. The results show that proper amount of glass fiber can improve the dynamic stability, residual stability, raveling loss, immersion raveling loss, maximum bending strain and volume stability of the mixture. Although the glass fiber can adversely affect the freezing-thawing splitting strength ratio, it still meets the requirements of the drainage asphalt mixture specification. By analyzing the performance of the glass fiber steel slag drainage asphalt mixture, and considering the fiber dispersion and economic benefits, the recommended glass fiber dosage is 0.1%.

Keywords： glass fiber steel slag drainage asphalt mixture road performance