What is the significance of angularity in aggregates during use by traffic?

• A. It reduces noise pollution
• B. It helps resist permanent deformation
• C. It enhances the color of the pavement
• D. It increases the speed of water drainage

Answer: (B)

The significance of angularity in aggregates is primarily associated with its role in providing interlock and stability in pavement. Angular aggregates have sharp, well-defined edges that create better mechanical interlocking between particles, leading to enhanced stability under traffic loads. This interlocking ability helps resist permanent deformation, which is crucial in preventing rutting and other forms of distress in the pavement structure.

When aggregates are more angular, they can better distribute loads and maintain the integrity of the pavement surface over time. This characteristic is particularly vital in areas with heavy traffic, where the pavement is subjected to repeated stresses. Therefore, the angularity of aggregates contributes significantly to the overall performance and durability of the pavement, ensuring it can withstand the demands placed upon it by traffic.