What percentage of the overall volume of HMA is occupied by aggregate?

The percentage of overall volume of Hot Mix Asphalt (HMA) occupied by aggregate primarily falls within the range of 70-75%. This is significant because aggregate is a key component in HMA, contributing to its structural integrity and performance.

The aggregate provides strength, stability, and durability to the asphalt mixture. While it varies slightly depending on specific mix design and the type of aggregate used, the general consensus in the industry confirms that aggregates typically make up approximately 70-75% of the total volume. This ensures that the final asphalt product has the necessary characteristics for effective use in road construction and maintenance.

Understanding this proportion is crucial for HMA inspectors as it directly influences the mixture’s properties, including workability, compaction, and overall performance of the pavement under various load and environmental conditions.