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New Innovations in Road Seal
Treatments19th South Australian Local Government Road
& Works ConferenceBAROSSA – 25th & 26th August 2011
Warren Carter – National Technical Manager
Introduction
• What are you trying to seal?– Base (granular/stabilised)– Existing seal– Asphalt (new/old)– Concrete– Bridge deck (wood/concrete/steel)
• What additional properties are desired?– Noise reduction– Water shedding– Friction
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Primes and Spray Seals Innovations
• Emulsion Primes• Emulsion Precoats• Binders
– Bitumen (local, imported)– Polymer modified (SBS, PBD, crumbed, etc)– Emulsions (HBCE, PME)
• Aggregates– Recycled?
• Sprayers– Variable application spray bars
Primes and Spray Seals Innovations cont’d
• BRP Road Patch• Maintenance products
Sealing Asphalt
• Crack sealing• Spray seal• Fog coat
– Seals surface pores and cracks
• Rejuvenators– Seals surface pores and cracks– May soften the existing surface binder (precautions?)
• High skid resistant surfacings– Calcined bauxite
• Delineating surfacings
Sealing Asphalt cont’d
• Asphalt overlays– AC– OG– SMA– UTA (proprietary products – smoothness, noise, skid
resistance, water shedding, etc)
Sealing Asphalt cont’d
• Microsurfacing/slurry• Mats, ready roll pavements
Sealing Concrete and Bridge Decks
• Prime application is critical– QDP
• Treatments– Spray seals, asphalt, etc
• Diamond grinding
Asphalt Innovations - Sustainability
• RAP• Warm mix asphalt
Questions?