Details:

Creators:
Thompson, Bill
Corporate Creators:
Maine. Dept. of Transportation. Transportation Research Division
Subject/TRT Terms:
[+]
Asphalt Pavements Binders Cracking Field Tests Hot Mix Asphalt Pavement Performance Phosphoric Acid Rutting Superpave
Publication/ Report Number:
08-13
Resource Type:
Tech Report
Geographical Coverage:
Maine
Corporate Publisher:
Maine. Department of Transportation
Abstract:
The Maine Department of Transportation (MaineDOT) uses the Superpave hot mix asphalt process and

specifies asphalt binder grades using the Performance Grade criteria. The Department mainly uses asphalt

binder grade PG64-28. This is an asphalt binder material that passes the performance tests for high

temperatures (rutting potential) at 64 degrees Celsius and passes tests for low temperatures (thermal

cracking) at 28 degrees Celsius. It is widely recognized in the industry that the addition of polyphosphoric

acid to asphalt can increase the high temperature PG grade to the next higher grade. However, there are

concerns among transportation agencies that this PPA could alter the long term performance of the asphalt

binder. One of the major asphalt suppliers to MaineDOT paving projects uses PPA to alter their PG58-28

neat asphalt binder into a PG64-28.

This experimental construction study was established to field test the long term performance of the PPA

modified PG64-28 and compare it to the PG58-28 neat asphalt binder.

A highway reconstruction project, NH-1000(800)E, along Rt. 1 in Perry, Maine was selected as a suitable

site for this comparison.


Format:
PDF
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:3159bcedc6869b6c0975325ba376b46dc9e74942b5f67af0dbdd01686ee75308
Download URL:
https://rosap.ntl.bts.gov/view/dot/28474/dot_28474_DS1.pdf
File Type:

Supporting Files

• No Additional Files

More +