Title

Investigation of recycled concrete made with limestone aggregate for a base course in flexible pavement

Authors

Authors

S. S. Kuo; H. S. Mahgoub; A. Nazef; Board Transportation Research; Board Transportation Research;Board Transportation Research

Comments

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Keywords

Engineering, Civil; Engineering, Geological; Geology; Materials Science, ; Characterization & Testing; Transportation Science & Technology

Abstract

The research objectives were to investigate the feasibility of using recycled concrete aggregate (RCA) as a base course material in asphalt pavement, to evaluate the physical properties of RCA, and to develop practical and reliable guidelines and specifications. The tasks included literature review, sample collection, laboratory testing, accelerated performance testing and pavement distresses monitoring, failing weight deflectometer (FWD) test, theoretical analysis of pavement, and development of guidelines and specifications for the use of Florida RCA. Three test sections of asphalt pavement were constructed at the University of Central Florida's circular accelerated test track. Two sections of different thicknesses were constructed with RCA base and one section with limerock (LR) base. A total of 362,198 load repetitions were applied to the test sections. This is equal to 811,324 repetitions of the 18-kip (80-kN) equivalent single-axle load. The pavement distresses of rutting, cracking, and settlement were monitored during the course of the performance testing. The FWD test was performed on the pavement test sections to backcalculate the in situ resilient moduli of RCA and LR for theoretical analysis of life expectancy. The findings support the hypothesis that RCA can be used effectively as a base course when appropriate quality control techniques are used. On the basis of the information obtained, a set of specifications for the use of RCA as a base course in flexible pavements was developed.

Journal Title

Geomaterials 2002: Soils, Geology, and Foundations

Issue/Number

1787

Publication Date

1-1-2002

Document Type

Article

Language

English

First Page

99

Last Page

108

WOS Identifier

WOS:000179620300011

ISSN

0361-1981; 0-309-07712-5

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