What is a full-depth reclamation?
Full-Depth Reclamation (FDR) is the process of pulverizing all layers of existing asphalt pavements in place to depths of up to 20 inches. The pulverized layers are reclaimed to provide a homogeneous base layer to support a new, thinner surface layer section of asphalt.
What is full-depth asphalt pavement?
Also known as asphalt pulverization, full-depth reclamation is a construction rehabilitation technique of removing the distressed layer of existing asphalt, blending it with the existing stone base, and creating a recycled usable base for the new asphalt.
What does reclaim paving mean?
Reclaimed asphalt pavement (RAP) is the term given to removed and/or reprocessed pavement materials containing asphalt and aggregates. In most instances, the broken material is picked up and loaded into haul trucks by a front-end loader and transported to a central facility for processing.
What does reclaiming a road mean?
Most simply put, road reclamation is a method of road construction that uses soils already on site, reducing or altogether eliminating the need to haul in additional aggregate.
What is deep lift asphalt?
(b) Deep lift paving technique. This is a PAVING TECHNIQUE whereby the asphalt base course is placed in one or more lifts of four or more inches compacted thickness. A pavement constructed of asphalt for the surface and base, placed on a granular or stabilised subbase.
What is asphalt pavement?
Asphalt pavement refers to any paved road surfaced with asphalt. Hot Mix Asphalt (HMA) is a combination of approximately 95% stone, sand, or gravel bound together by asphalt cement, a product of crude oil. The resulting Hot Mix Asphalt is loaded into trucks for transport to the paving site.
What is recycled asphalt?
Recycled asphalt, or reclaimed asphalt pavement (RAP), is reprocessed pavement containing asphalt and aggregates. The United States Federal Highway Association (FHA) notes these underlying materials are created when asphalt pavements are removed for various activities, including: Reconstruction. Resurfacing.
How is Microsurfacing done?
Microsurfacing is similar to slurry seal. It consists of the application of a mixture of water, asphalt emulsion, aggregate (very small crushed rock), and chemical additives to an existing asphalt concrete pavement surface. Polymer is commonly added to the asphalt emulsion to provide better mixture properties.
What is the difference between slurry seal and microsurfacing?
The major difference between slurry seal and microsurfacing is in how they “break” or harden. Slurry relies on evaporation of the water in the asphalt emulsion. The asphalt emulsion used in microsurfacing contains chemical additives that allow it to break without relying on the sun or heat for evaporation to occur.
