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Title:

Influence of Recycled Asphalt Pavement Content on Air Void Distribution, Permeability, and Modulus of Base Layer

Accession Number:

01372869

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: www.trb.org/Main/Blurbs/167642.aspx

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Order URL: http://worldcat.org/isbn/9780309223096

Abstract:

The use of recycled materials for construction is beneficial to both the environment and the economy. Reclaimed asphalt pavement (RAP) is one of the most commonly used recycled materials. State departments of transportation allow its use in unbound base materials at different percentages. The modulus and the permeability are recognized as important parameters for base course materials because of their effect on pavement service life. Determining the effects of the percentage of RAP on the modulus and permeability of base materials that contain RAP is important for proper pavement design. This study evaluates the effects of RAP percentage on the resilient modulus and the permeability of unbound base materials. Increasing the RAP percentage increased the resilient modulus. Constant-head permeability test results indicated that increasing the RAP percentage decreased the coefficient of permeability. High-resolution X-ray computed tomography was used to study the internal structure of the test specimens. RAP mixtures had lower void ratios than virgin crushed aggregate, which explained the high resilient modulus and low permeability of RAP mixtures.

Supplemental Notes:

This paper was sponsored by TRB committee AFP70 Mineral Aggregates

Monograph Title:

Geomaterials 2012

Monograph Accession #:

01379841

Report/Paper Numbers:

12-4240

Language:

English

Authors:

Wu, Mengqi
Wen, Haifang
Muhunthan, Balasingam
Manahiloh, Kalehiwot N

Pagination:

pp 65-71

Publication Date:

2012

Serial:

Transportation Research Record: Journal of the Transportation Research Board

Issue Number: 2267
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

9780309223096

Media Type:

Print

Features:

Figures; Photos; References; Tables

Subject Areas:

Geotechnology; Highways; Materials; Pavements; I36: Aggregates

Files:

TRIS, TRB, ATRI

Created Date:

Feb 8 2012 5:22PM

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