Effects of buton granular asphalt and portland cement on unconfined compressive strength of cold asphalt mixture

Abstract

Cold Asphalt Mixture (CAM) is one of the green construction technologies in the transportation sector to support sustainable development. However, the conventional CAM performs poorly. The research was conducted in a laboratory and aimed to analyze the mechanical properties of CAM containing Buton granular asphalt (BGA), Portland composite cement (PCC), and limestone aggregate. The use of 9% BGA could decrease 15% of the control specimen on its maximum compressive strength and maximum shear strength. While using 1.5% Portland composite cement combined 9% Buton granular asphalt could increase 6.6% of the control specimen on its compressive strength and shear strength. The modulus of elasticity of CAD containing BGA and PCC is higher than the control specimens, but the elastic modulus is still lower than that of Hot Mix Asphalt (HMA). Thus, the application of BGA and PCC in CAM should be a flexible pavement material in Indonesia.