{{Short description, Physical property of compacted asphalt
Voids in Mineral Aggregate or VMA is the intergranular space occupied by asphalt and air in a compacted
asphalt
Asphalt, also known as bitumen (, ), is a sticky, black, highly viscous liquid or semi-solid form of petroleum. It may be found in natural deposits or may be a refined product, and is classed as a pitch. Before the 20th century, the term a ...
mixture. In a component diagram, it is the sum of the volume of air and the volume of effective asphalt. The volume of absorbed asphalt is not considered to be a part of VMA because it is part of the
pore structure
Pore structure is a common term employed to characterize the porosity, pore size, pore size distribution, and pore morphology (such as pore shape, surface roughness, and tortuosity of pore channels) of a porous medium. Pores are the openings in th ...