Evotherm - Warm Mix Asphalt

1 EvothermWhat is it? Chemical additive package Optimized to deliver Mixing Coating Workability Compaction AdhesionEvotherm EmulsionHow does it work? Evotherm Emulsion Technology (ET) High-residue Asphalt emulsion Delivered at by emulsion weightEvotherm DATHow does it work? Evotherm Dispersed Asphalt Technology (DAT) Same chemistry as Evotherm ET Chemical concentrate directly injected into Asphalt line at plant DAT concentrate delivered at ~5% by Asphalt weightEvotherm DATE votherm Composition0%1%2%3%4%5%6%7%8% Evotherm ETEvotherm DATE votherm SolutionAsphalt CementEvotherm How does it work?

2 Effective temperature range Mix temperature 250-170 F Compaction temperature 235-160 FTypical Application Temperature~100 F less than Hot MixHot are we now? 45 Projects in 2007; 70+ projects to date >80,000 tons in 2007; 100,000+ tons to date Evotherm paved in 17 states; 5 Canadian provinces France, Spain, South Africa, Mexico, & ChinaRecent Evotherm Developments New Chemistries 6 different options available Dosage rate optimization Original dosage rate 11oz/Ton Current dosage rate 5 oz/Ton Water-free Evotherm Longer binder lifeBinder Hardening020406080100120140 Virgin ACRecoveredAC2 yearsPenHot MixEvothermE9E9 NCAT Test mm NMAS w/ mm NMAS w/ Evotherm PG 67 Evotherm PG mm NMAS w/ mm NMAS w/ Evotherm PG 67 Evotherm PG 67--2222N1N1N2N222 22 11 mm mm NMASHMA Control PG 67 HMA Control PG 67--2222 Evotherm PG 76 Evotherm PG 76--2222 Evotherm PG 67 Evotherm PG 67--2222

3 NNdesigndesign= 80= 80for all mixesfor all mm600,000 ESALsE9E9 NCAT Test mm NMAS w/ mm NMAS w/ Evotherm PG 67 Evotherm PG mm NMAS w/ mm NMAS w/ Evotherm PG 67 Evotherm PG 67--2222N1N1N2N222 22 11 mm mm NMASHMA Control PG 67 HMA Control PG 67--2222 Evotherm PG 76 Evotherm PG 76--2222 Evotherm PG 67 Evotherm PG mm5,600,000 ESALsNNdesigndesign= 80= 80for all mixesfor all mixes