Sage-Tips

What is double surface dressing?

This is the application of two simple surface dressings, the second of these being made with a smaller sized aggregate than that used in the first. A simple surface dressing consisting in the application of a bituminous binder to a surface, followed by spreading and tamping the aggregate layer.

What is double surface treatment on roads?

Double Surface Treatment means two successive single surface treatments. End Nozzle means a spray bar nozzle which delivers binder to the inside half of a standard spray pattern.

What is single surface dressing?

1.2 Surface dressing comprises a thin film of binder, generally bitumen or tar, which is sprayed onto the road surface and then covered with a layer of stone chippings. The thin film of binder acts as a waterproofing seal preventing the entry of surface water into the road structure.

How does surface dressing work?

Surface dressing involves spraying bitumen binder (a sticky tar-like substance) on a clean, dry road surface, over which stone chippings are spread (small, consistently-sized aggregate). The weight of vehicles passing over these loose stones will force them in to the bitumen to finish the new road surface.

What is road surface treatment?

Surface Treatment is the application of an asphalt emulsion on either an existing asphalt road or a fresh, compacted granular surface immediately followed by the application of a cover aggregate.

What is double bituminous surface treatment?

A double bituminous surface treatment is a method of pavement construction that involves two separate applications of asphalt binder material and mineral aggregate on a prepared surface.

Which is more expensive asphalt or concrete?

The cost of an asphalt driveway is typically cheaper than concrete, costing $2.00 – $4.00 per square foot. In contrast, a concrete driveway costs between $4.00 – $6.00 per square foot for a standard installation. Finishes, details and stains can increase the price tag to as much as $15.00 per square foot.

How can I tell if my driveway is asphalt or concrete?

Perhaps the most recognizable difference, though, simply comes down to color – asphalt is black and concrete is gray.

What is the difference between bituminous and asphalt concrete?

Bitumen is actually the liquid binder that holds asphalt together. The term bitumen is often mistakenly used to describe asphalt. A bitumen-sealed road has a layer of bitumen sprayed and then covered with an aggregate. Asphalt results in a smoother and more durable asphalt road surface than a bitumen-sealed road.

What is a double surface dressing?

A double surface dressing is also called a double chip seal. It is a wearing course made by the application of one layer of an asphaltic material, like cutback asphalt, asphalt emulsion or even hot liquid asphalt, followed by a layer of aggregate chips with a particular gradation curve.

What is sursurface dressing?

Surface dressing is a cost-effective way of restoring the road surface and sealing it in one process. Surface dressing also: protects the road against frost and water damage. We spray the road with bitumen binder, followed by a layer of stone chippings. The chippings are pressed into the surface by a roller.

What does double surface treatment lot mean?

Double Surface Treatment means two successive single surface treatments. End Nozzle means a spray bar nozzle which delivers binder to the inside half of a standard spray pattern. Lot means the quantity of work completed with a tanker truck shipment of binder.

What are the objectives of surface dressing?

•Objective of achieving consistency in the design and installation of Surface Dressing. •Surface dressing has become increasingly important since the introduction of standards for skidding resistance on National roads, e.g. AM-PAV-06045 (HD28)