چكيده به لاتين
Abstract:
Asphalt mixtures consist of two components binder and aggregate. Considering that aggregates comprise more than 90% by weight and about 75% by volume of asphalt mixtures, we can recognize them as a main framework of asphalt mix. Therefore physical and mineral properties of aggregate can have a major impact on the quality of the asphalt mixtures properties and performance. Fractured coarse aggregate percentage is one of the most important physical properties of aggregates that effects on the asphalt mixture performance.
Since the supplying high fractured aggregate percentage has high cost in some areas and high fractured aggregate percentage has negative effects on some specification of asphalt mixtures such as: mixture performance, therefore understanding the trend to change any of the specification asphalt mixtures to change of fractured coarse aggregate percentage (CAA) can help effectively in decision to choose the best value of fractured aggregate percentage in the asphalt mixture.
The purpose of this research is to evaluate and comparison the performance of asphalt mixtures with different fractured coarse aggregate percentages (0, 20, 40, 60, 80 and 100). Marshall mixture design was used to evaluate the performance of hot mix asphalt. Currently, Marshall mixture design is used to design, evaluate and determine the characteristics of asphalt mixtures in many countries. The results showed that a general trend by increasing the fractured coarse aggregate percentage, the density of the mixture decrease and optimum asphalt content, Marshall stability, flow, percent air voids and voids in mineral aggregate increase.
Keywords: Aggregate, Fractured Coarse Aggregate Percentage (CAA), Hot Mix Asphalt, Marshall Mixture Design
