Details:

Creators:
Hobson, Cliff
Corporate Creators:
Kansas. Dept. of Transportation. Bureau of Research
Corporate Contributors:
United States. Federal Highway Administration
Subject/TRT Terms:
[+]
Age-Hardening Age Hardening Antioxidant Antioxidants Binders Bituminous Binders Bituminous Mixtures Hot Mix Asphalt Lignin Oxidation
Publication/ Report Number:
FHWA-KS-16-17
Resource Type:
Tech Report
Geographical Coverage:
Kansas
Corporate Publisher:
Kansas. Dept. of Transportation. Bureau of Research
Abstract:
The chemical process of oxidative age-hardening in asphalt pavements is one of the major distresses

leading to hot mix asphalt (HMA) pavement failure as evidenced by fatigue and thermal (low temperature)

cracking.

Research investigations at the Western Research Institute (WRI) prior to 2005 suggested the addition

of lignin may reduce the oxidation rate of asphalt binder. Research efforts by Bishara, Robertson, and

Mahoney (2006) at the Kansas Department of Transportation’s Research Chemistry Laboratory in 2005 also

suggested the addition of lignin to asphalt binder appeared to reduce the oxidation rate of the binder, and

therefore, had the potential to be an antioxidant for HMA pavement.

The objective of this 2007 limited laboratory research project was to determine the potential of

reducing the oxidation rate of HMA pavements by adding lignin to the asphalt binder used to produce the

HMA mixture. The testing matrix for this study consisted of two binders, two basic aggregate mixtures, and

one hardwood lignin at one concentration. Eight total mixtures with and without lignin were tested after

long-term aging to determine if the lignin had any effects on the material properties. The test results from

this project showed minimal differences between the lignin test specimens and the control specimens.

Based on the results from this limited study, there is no clear evidence adding lignin to HMA

mixtures reduces oxidation or the lignin acted as an antioxidant.


Format:
PDF
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:ab9144efdc798998b49cfb4012a3c5d5f8adfdf53b5b199fb620290d41db1f6c
Download URL:
https://rosap.ntl.bts.gov/view/dot/31856/dot_31856_DS1.pdf
File Type:

Supporting Files

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