Designing, producing, and constructing fine-graded hot mix asphalt on Illinois roadways.

Buttlar, William G.; Na chiangmai, Chaiwat; Al-Qadi, Imad L.; Murphy, Timothy R.; Pine, William J.; University of Illinois at Urbana-Champaign. Dept. of Civil and Environmental Engineering

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Designing, producing, and constructing fine-graded hot mix asphalt on Illinois roadways.

2015-04-01
By Buttlar, William G. ; Na chiangmai, Chaiwat ; Al-Qadi, Imad L. ; ...

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English

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Creators:

Buttlar, William G. ; Na chiangmai, Chaiwat ; Al-Qadi, Imad L. ; Murphy, Timothy R. ; Pine, William J.

Buttlar, William G. ; Na chiangmai, Chaiwat ; Al-Qadi, Imad L. ; Murphy, Timothy R. ; Pine, William J. Less -
Corporate Creators:

University of Illinois at Urbana-Champaign. Dept. of Civil and Environmental Engineering
Corporate Contributors:

United States. Federal Highway Administration ; Illinois. Dept. of Transportation

United States. Federal Highway Administration ; Illinois. Dept. of Transportation Less -
Subject/TRT Terms:

[+]

Bituminous Binders Cracking Feasibility Analysis Fine Aggregates Hot Mix Paving Mixtures Mix Design Performance Based Specifications Performance Tests Permeability Recommendations Rutting
Publication/ Report Number:

FHWA-ICT-15-009 ; ICT-15-009 ; UILU-ENG-2015-2010

FHWA-ICT-15-009 ; ICT-15-009 ; UILU-ENG-2015-2010 Less -
Resource Type:

Tech Report
Geographical Coverage:

Illinois
Corporate Publisher:

Illinois Center for Transportation
Abstract:

Fine-graded (F-G) asphalt concrete mixtures are composed of an aggregate structure in which the fine fraction controls the

load-carrying capacity of the mix. Other states have reported benefits in using F-G mixtures, including improved compaction,

lower segregation, and lower permeability—resulting in longer life. Rutting concerns have been mitigated through the use of

manufactured sand. This study investigates the feasibility of using F-G mixtures for IL 19.0 mm (3/4 in) asphalt binder courses

in Illinois. A careful laboratory investigation, including mix designs guided by the Bailey Method, was conducted, then followed

by extensive laboratory performance testing. Performance tests indicated that the F-G mixtures had equivalent or superior rut

and crack resistance to a reference coarse-graded (C-G) control mixture. Limited field trials demonstrated the F-G mixtures

were easier to compact, led to higher pay factors, and had significantly lower permeability than traditional C-G mixtures, while

being similar in cost. Whether designing a coarse- or fine-graded mixture, optimum asphalt content will be the same when

using the same materials and targeting the same VMA and voids level, provided asphalt absorption remains constant. Limited

full-scale accelerated pavement tests also demonstrated similarity in rutting resistance between the C-G and F-G mixtures

investigated. Recommendations for implementation of F-G mixtures are provided, along with a revised draft specification for

19.0 mm mixtures. The revised specification provides upward adjustments to the lower side of the gradation band at the

primary control sieve to lessen the likelihood of designing segregation-prone binder mixtures and raises the upper band to

permit F-G mixtures to be designed. These principles apply to surface course mixtures as well.
Format:

PDF
Funding:

R27-079
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:0ebd671c056abc676d51f4b0e7bb0ff7ea0ac9532d555b287d34d130b564124d
Download URL:

https://rosap.ntl.bts.gov/view/dot/28816/dot_28816_DS1.pdf
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Designing, producing, and constructing fine-graded hot mix asphalt on Illinois roadways.

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