Effect of Waste Ceramic Powder on the Properties of Asphalt Binder and Asphalt Concrete MixturesEffect of Waste Ceramic Powder on the Properties of Asphalt Binder and Asphalt Concrete Mixtures

In the past decades, there has been an increase in traffic volumes and loads on pavement roads. Thus, there has been a need to enhance the properties of road pavements using certain additives in hot mix asphalt (HMA). In this research waste ceramic powder (WCP) was used as a filler replacing the conventionally used limestone filler by different percentages (0, 25, 50, 75 and 100%) by weight of mineral filler in the HMA specimens and their respective asphalt mastic. The research aimed to study the practicality of using WCP in asphalt mixes and its effect on their properties, specifically using the dynamic creep and indirect tensile tests which have not been conducted on WCP-HMA prior to this research. The rotational viscosity (RV) test results showed that increasing the WCP% increased the dynamic viscosity of the mastic. The dynamic shear rheometer (DSR) test results showed that increasing the WCP percentage slightly enhanced the rutting resistance, but results of the PAV-aged mastics showed that increasing the WCP percentage slightly decreased the fatigue cracking resistance. The bending beam rheometer (BBR) test results showed that increasing the WCP percentage in the mastic slightly decreased the low-temperature cracking resistance. Overall, the WCP replacement increase in the asphalt mastics was not very effective. The HMA testing results showed that the WCP significantly increased the Marshall stability of the asphalt mixes. As for the dynamic creep test, the results showed that the highest resilient modulus and creep modulus values were mostly at 100% WCP. The indirect tensile modulus test results showed that at 5 and 25 °C 25% WCP was the optimum percentage, and at 40 °C 50%WCP was the optimum percentage.