Asphalt plants

Asphalt

Used for everything asphalt pavement is a mixture of sand, gravel small and middle fractions, mineral powder and bitumen, performing the role of binder between the other ingredients.

As a binder, bitumen is approximately 6% of the total weight of the asphalt, 85% - it's rubble or gravel. Asphalt involves not just compound and mixing the above mentioned components but also instant paving.

Bitumen is a binding function is performed only in a hot (molten) state. Prepared, but not immediately laid the asphalt loses its properties and not subject to subsequent use. It becomes brittle INE compacted to the desired state.

Varieties of asphalt

Artificial asphalt used for arranging the pavement is of three kinds. Each type of asphalt has its specific purpose.

Sandy. This type of asphalt mixture used for paving walkways and sidewalks, is composed primarily of sand, crushed stone fines (5mm), bitumen and mineral powder.

Fine-grained. Such asphalt for paving the road. In the case of two-layer coating is used as top layer. The composition differs little from the sandy asphalt larger size gravel - fine fraction (5-15 mm).

Coarse. This mixture is used for arranging the lower layer of pavement. For its preparation used fine gravel (5-15 mm) and coarse fraction (20-40mm).

Potential customers

The main consumers of asphalt is the organization responsible for the condition of the roads, a company specializing in the repair of their ipredstaviteli business, responsible for the state of roads, sidewalks and parking lots, located on their territory.

Organization of production

As a method for producing the asphalt is of three types.

Hot,

Warm,

 Cold.

The principal difference is brought to a temperature of blending components. Hot and heated asphalt is prepared by adding the components in the preheated hot or warm binder. Cold asphalt involves the use of only one type of components in a heated state - cold macadam is added to the warmed binder or vice versa.

A typical cooking technique hot mix asphalt is as follows.

Drying aggregates (crushed stone, sand, gravel) or heating up 2000C.

Mixing at 1600s with the addition of filler and bitumen.Storage of finished asphalt (silage) at 150-1800S.