Norlite, LLC
628 S. Saratoga Street Cohoes, NY 12047
(518) 235-0030 (phone) (518) 235-0233 (fax)

Other Uses

Asphalt Application Types

Chip Seal

This surface treatment is referred to by several names depending on the local area. The most common name is chip seal, however, other names like seal coat, surface treatment, inverted  penetration, oil and chip, chip and seal, and  armor coat are also used.  

Chip seals are made by spraying a layer of asphalt emulsion or hot liquid asphalt, covering  it with aggregate and then rolling it. Only pneumatic rubber tire rollers are used with LWA.

Any chip seal application has some non-embedded loose stones that can be picked up by a tire and sent "flying". Damage to windshields, headlights and paint caused by "flying" stones is practically eliminated with LWA thus avoiding those costly insurance claims and motorist complaints. The lightness of the LWA plus the higher wind resistance of the rough surface texture lowers the speed at impact. The resulting striking force is too small to do damage. The rough surface texture also bonds to the asphalt better so there are fewer "flying" particles in the first place.

Chip seal paving is a low cost durable surface treatment since it uses less materials and is not premixed at the asphalt plant or job site. This type of surface treatment is normally used on low-volume rural roads or city streets. However, because of its high skid resistance, superior bonding capability and lack of vehicle damage, LWA chip seals have been used on high-speed/high-volume city streets and highways such as the Autobahn in Germany and Interstate highways in the United States.

Lightweight chip seals offer the engineer an economical, long lasting road surface that is safer to drive on and free of motorist complaints.

Plant Mix Seal Overlay or Open-Graded Friction Coarse

This application uses uniformly-sized aggregate. The material is first pre-blended in a drum mix plant using excess oil. The mixture is sent to the job site hot and is put down with a standard laydown machine. The finished road surface has a coarse open-graded texture that is very durable with excellent drainage and skid resistance.

LWA plant mix seals are often used to overlay existing pavement after extensive repairs have been made.

Plant mix seals are very effective on high-volume/high-speed roadways and, because of the open texture, they offer a quieter ride and much less water spray from moving vehicles  especially trucks. This type of surface design is quieter because percussion cups are eliminated by the open surface.

Hot Mix Surface Coarse

Hot mix, the premier asphalt surface alternative, is much denser and a tighter graded mixture that is usually a blend of LWA and normal weight aggregates. This material is shipped hot and laid down using conventional methods.

LWA hot mixes have performed successfully on freeways with high truck traffic. Increased skid resistance and extended performance life makes LWA hot mixes a preferred choice.

Micro-Surfacing (Slurry Seal)

Micro-surfacings are useful in stopping the deterioration of an oxidized asphalt surface and the various types of problems that occur with weathering. Fine-graded LWA works well in slurry seals and micro-surfacing, and improves skid resistance.

Cold Mix - Pothole Patch

LWA is versatile in cold mix form because it has a tenacious bond with asphalt. Since it has a lower heat capacity than normal weight stone, LWA can be used in deep pothole patching applications.