1. Performance Graded Specifications for Emulsified Asphalt
A Path Forward
Performance Graded Specifications for Emulsified Asphalt
November 29, 2017 – ETF Meeting

2. What’s Been Done NCHRP 9-50 TXDOT / TTI Research
Development of low temperature recovery test
NCHRP Report 680
FLH Study
Other local research

3. Standards Developed
AASHTO R 78 / ASTM D7497 Low Temperature Residue Recovery
M 140, M 208, M 316 Updates
NCHRP 9-50 (EPG) and TXDOT standard (SPG) introduced to TS 2a
AASHTO MP 25/PP 85, PG Hot-Poured Asphalt Crack Sealant
AASHTO MP XXX Performance-Graded Asphalt Binder for Surface Treatment (balloted)

4. The Need for Performance – Related Specifications
Create a “level playing field” for producers / suppliers
Improved performance
Encourage innovation
Cost efficiency
Reduce early failures
Differences in climate, traffic, materials across regions
Source: ETF

5. Going Forward…for discussion
Complete 2017 summer testing round robin (extend into spring?) and analyze results
Develop a consensus material specification by June, 2017
Allows TS 2a to consider for adoption at summer meeting
Find state(s) to pilot the use of the specification; local university support
Promote to user groups