INVESTIGATING THE EFFECT OF OLIVE HUSK ASH ON DYNAMIC CREEP OF ASPHALT CONCRETE MIXTURES

This paper aims at finding out the impact of Olive Husk Ash on the dynamic creep of asphalt concrete. The asphalt concrete mixtures were subjected to a simulation of a creep test using a Universal Testing Machine, and five percentages of Olive Husk Ash by volume of the binder were added. Three loading frequencies (1, 4 and 8 Hz), which simulate vehicle speeds of 20, 40 and 60 miles/hr. respectively and three testing temperatures (5, 25 and 40^oC), which represent cold, moderate, and hot temperatures, were taken into consideration. Olive Husk Ash, sometimes known as olive waste ash, is widely available in Jordan. This study uses olive husk ash as an asphalt additive to recycle it. Additionally, using ash reduces the financial expense of making asphalt mix. The results show that adding ash at the right concentration (10-15%) improves the quality and effectiveness of asphalt concrete mixtures. The addition of OHA to asphalt has a beneficial effect on improving resilient modulus and creep stiffness as well as reducing accumulated strain at various frequencies and temperatures.