Crushed Waste Concrete in Stone Mastic Asphalt Mixtures

Abstract

The magnitude 7.6 Chi-Chi Taiwan in 1999 and the magnitude 7.9 Sichuan China in 2008 earthquakes caused many building damage and collapse, and a large amount of waste concrete caused many environmental problems. This study evaluates crushed waste concrete used as aggregate for stone mastic asphalt. On the basis of this study, the ANOVA of the permanent deformation test shows that the type of aggregate has a significant effect at test temperature of 60 °C, but not significantly affect at 25 °C. Thus, the ability of permanent deformation resistance of the crushed waste concrete mixture is better than that of 100% virgin crush stone mixture. The stability values of the crushed waste concrete mixtures are higher than the 100% crush stone mixture, especially in 50% crushed waste concrete plus 50% crush stone and coarse crush stone plus fine crushed waste concrete (C-crush stone plus F-crushed waste concrete). The stone mastic asphalt mixed with 50% crushed waste concrete plus 50% crush stone are more practicable for use than others.

Keywords

• crushed waste concrete (cwc)
• stone mastic asphalt (sma)
• resilient modulus
• permanent deformation