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Asphalt Construction Today

Asphalt is a mixture of aggregates, binder and filler, used for constructing and maintaining all kind of roads, parking areas but also play- and sport areas. Aggregates used for asphalt mixtures could be crushed rock, sand, gravel or slags. In order to bind the aggregates into a cohesive mixture a binder is used. Most commonly, bitumen is used as a binder. An average asphalt pavement consists of the road structure above the formation level which includes unbound and bituminous-bound materials. This gives the pavement the ability to distribute the loads of the traffic before it arrives at the formation level. Normally, pavements are made of different layers:

1.     Hot Mix Asphalt Production 

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  2. GENERAL SPECIFICATION

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While many site preparation specialists out-source their paving assignments, Schlouch Incorporated extends its full range of services with its own in-house paving capability. Schlouch’s paving teams handle all types of paving assignments including residential subdivisions, municipal, commercial, industrial, and PennDOT roadwork. Schlouch’s paving teams can handle any size paving job from utility patchwork to high production overlays, maintenance programs, and new construction.

Bitumen" redirects here. For naturally occurring bituminous sands used for petroleum production, see Oil sands.

For other uses, see Asphalt (disambiguation).

Note: The terms bitumen and asphalt are mostly interchangeable, except where asphalt is used as an abbreviation for asphalt concrete. This article uses "asphalt/bitumen" where either term is acceptable.

Natural asphalt/bitumen from the Dead Sea

The University of Queensland pitch drop experiment, demonstrating the viscosity of asphalt/bitumen

The primary use (70%) of asphalt/bitumen is in road construction, where it is used as the glue or binder mixed with aggregate particles to create asphalt concrete. Its other main uses are for bituminous waterproofing products, including production of roofing felt and for sealing flat roofs.^[10]

The terms asphalt and bitumen are often used interchangeably to mean both natural and manufactured forms of the substance. In American English, asphalt (or asphalt cement) is the carefully refined residue from the distillation process of selected crude oils. Outside the United States, the product is often called bitumen. Geologists often prefer the term bitumen. Common usage often refers to various forms of asphalt/bitumen as "tar", such as at the La Brea Tar Pits. Another archaic term for asphalt/bitumen is "pitch".

Naturally occurring asphalt/bitumen is sometimes specified by the term "crude bitumen". Its viscosity is similar to that of cold molasses^[11][12] while the material obtained from the fractional distillation of crude oil boiling at 525 °C (977 °F) is sometimes referred to as "refined bitumen". The Canadian province of Alberta has most of the world's reserves of natural bitumen, covering 142,000 square kilometres (55,000 sq mi), an area larger than England.^[13]