00450247

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http://onlinepubs.trb.org...s/trr/1984/989/989-005.pdf

https://scholar.google.co...iero&publication_year=1984

To investigate the performance of recycled concrete aggregates (RCA), physical test data from 1977 through 1982 are summarized in order to present typical characteristics of the RCA material. In situ deflection test results on various projects since 1974 are summarized. Deflection testing was performed on pavements constructed with crushed stone, asphaltic concrete, and recycled crushed concrete base courses. Analysis of the data indicates that the pavements constructed with recycled crushed concrete bases have strengths equal to or higher than stone or asphalt base pavements. The results of both laboratory work and test pavement experiments on the use of RCA in asphaltic concrete mixtures are also presented. In both cases it was found that the RCA-asphalt mixtures have 1.5 to 2.0 times the stability and are 15 percent lighter than a standard crushed stone-natural sand mix. In addition, the RCA mixture requires 0.5 to 1.0 percent more asphalt cement to have equal air voids and filled criteria. Finally, data from the Texas State Department of Highways and Public Transportation's long-term experience with the use of RCA-asphalt mixes are presented.

Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved. Publication of this paper sponsored by Committee on Mineral Aggregates.

01419866

HS-038 693

pp 19-26

1984

Transportation Research Record

Symposium on Reducing Constraints on Mineral Aggregate Development, 1984, Washington, Dc, USA

0309037735

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Figures (5) ; References (6) ; Tables (7)

Air voids; Alternatives analysis; Asphalt concrete; Concrete aggregates; Crushed aggregates; Crushed rock; Deflection tests; Recycled materials

Construction; Geotechnology; Highways; I36: Aggregates

TRIS, TRB

Feb 28 1986 12:00AM

• DETERIORATION OF BITUMINOUS PAVEMENT SURFACES BY GROWTH OF ALUM CRYSTALS
• IMPACT OF NEW YORK RECLAMATION LAW ON AGGREGATE SOURCE DEVELOPMENT
• MINERAL AGGREGATES. PREFACE
• POSITIVE IMPACT OF URBANIZATION ON THE AGGREGATE INDUSTRY
• PUBLIC HEARINGS AND THE MINE PERMITTING PROCESS
• STUDY OF AGGREGATES USED FOR CONCRETE IN KUWAIT
• TOWARD SUCCESSFUL PERMITTING OF MINERAL AGGREGATE OPERATIONS
• UTILITY DECISION ANALYSIS TO SELECT AGGREGATES FOR ASPHALT PAVEMENTS