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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?