Hiers Construction, paving is the process of finishing roads with asphalt. Before paving can begin, properly installing the subgrade is essential. Subgrade is the earth (or soil, or dirt) that the paving will cover. Performing a proof roll ensures a surface is ready for paving.

Asphalt is a semi-solid form of petroleum. It has a few basic ingredients, including a mixture of crushed stone, gravel, sand, and a material called bitumen. Bitumen is a sticky, black byproduct of petroleum that holds the aggregate together.

Asphalt pavement is made up of stone (aggregate), sand, additives and liquid (petroleum) asphalt. Liquid asphalt – a sticky black substance – is used as the binding material in asphalt pavements. It is viscous in nature and can also be found in semi solid forms. Another common term for asphalt is bitumen.