What is the volume of voids between the aggregate particles in a compacted asphalt mix known as?

The volume of voids between the aggregate particles in a compacted asphalt mix is referred to as Voids in Mineral Aggregate (VMA). This measurement is crucial in asphalt paving because it assesses the amount of space available for asphalt binder within the aggregate structure. VMA is essential for ensuring adequate binding of the asphalt and achieving the desired durability and performance of the pavement.

An appropriate VMA allows for proper lubrication of the aggregate particles, contributing to the overall stability and strength of the compacted mix. It also aids in preventing segregation and ensures that the mix has sufficient flexibility to withstand traffic loads and environmental conditions. It's a key component in defining the quality of the asphalt mixture and its ability to perform under load over time.

The other terms listed, while related to asphalt mixtures, refer to different characteristics or metrics. Aggregate void space refers to the empty spaces but does not specifically address the mix's performance under compaction. Compacted density pertains to the overall density of the mix, while asphalt porosity focuses more on the properties of the binder and its performance rather than the void space between aggregates specifically.