What is NovaChip • Ultra-thin polymer modified asphalt surface treatment. • Combines open graded hot mix asphalt with emulsified asphalt polymer-modified membrane.
Features & Benefits • Superior bond to the existing surface • Increases skid resistance, reduces noise • Ultra-thin application eliminates the need for utility adjustments. • Minimal traffic disruption, requires a single lane closure • Expected life cycle of up to ten years with crack sealing.
Features & Benefits (cont..) • Does not affect overhead clearances on bridges, overpasses, signs, and other structures. • Reduces hydroplaning and reduces spray on wet roadways.
Equipment • Specialized NovaChip paver • Rollers • Water truck
Materials • Open graded hot mix asphalt • NovaBond, a polymer modified asphalt emulsion.
History of NovaChip • 1988 - First trial in France • 1992 - Introduced in the United States • 1992-93 - Projects in TX, AL, PA, and NJ.
Application Rates • Novabond(TM) emulsion membrane 0.13 - 0.25 gal/sy • Ultra-thin hot mix asphalt overlay • Minimum application rates: Type A - 45-55 lbs./sy Type B - 50-65 lbs./sy Type C - 55-70 lbs./sy • Total Thickness: 3/8 to 3/4” • Maximum recommended thickness: 1-1/4”
Road Preparation for NovaChip • Pavement should be in reasonably good condition. • Pavement should be swept clean • Pavement should be dry before lay-down. • Crack seal all cracks ¼” wide or more • Repair all failed areas with full depth Patching. • Cover all utilities
Applications for NovaChip • Asphalt pavements • Concrete pavements • Airports • Interstate highways • Turnpikes
Total 9/16” Depth of Mix 3/8” Nominal Mix Size 3/16” NOVABOND depth NovaChip®: The Process PHASE 1 : during application (3/8” nominal size) The Novabond Emulsion “Wicks Up” Around the HMA Aggregates Surface of Mix 7.5-10 mm coating on mix Existing Pavement
Skid resistance test - PA SR 422 Chester & Montgomery Counties NovaChip applied to existing PCC surface Aug. 93 before - Dec. 93 after
NovaChip’s open gradation allows water to penetrate and disperse faster
East Hanover Township, Lebanon County, Pennsylvania Old Rt 22 before NovaChip
Alatchua County, FL Project Constructed 1999