Assessment of mechanical properties of rice husk ash modified asphalt mixture

摘要: Abstract Using rice husk ash (RHA), as a waste byproduct of milling, in bituminous roadways provides valuable advantages such reduction environmental degradation, lowering construction costs and saving natural resources. However, there are limited numbers studies on application this material asphalt mixture. The objective study was to investigate the effects RHA an modifier hot mix asphalt. Bitumen blends with 5%, 10%, 15% 20% modifier. For evaluation rheological properties binders, various tests including penetration grade, ductility, softening point, rotational viscosity dynamic shear rheometer were conducted. Also, mechanical mixtures Marshall stability, stiffness modulus, rutting resistance fatigue behavior assessed. results showed that bitumen enhanced by adding RHA. Furthermore, modification had positive impacts strength performance mixtures.