Test of recycled concrete aggregate in accelerated test track

Citation
Ar. Chini et al., Test of recycled concrete aggregate in accelerated test track, J TRANSP E, 127(6), 2001, pp. 486-492
Citations number
21
Categorie Soggetti
Civil Engineering
Journal title
JOURNAL OF TRANSPORTATION ENGINEERING-ASCE
ISSN journal
0733947X → ACNP
Volume
127
Issue
6
Year of publication
2001
Pages
486 - 492
Database
ISI
SICI code
0733-947X(200111/12)127:6<486:TORCAI>2.0.ZU;2-O
Abstract
This paper reports the findings of a project on evaluating the performance of recycled concrete aggregate (RCA) for use as a base material under hot m ix asphalt pavements and as an aggregate in portland cement concrete paveme nts. Nine design sections involving hot mix asphalt and portland cement con crete pavements were constructed at the University of Central Florida's Cir cular Accelerated Test Track to evaluate the performance of the pavement se ctions made with RCA under actual dual-wheel loading. Laboratory tests perf ormed on concrete specimens made of different percentages of RCA and virgin aggregate (VA) showed that the higher the percentage of RCA material, the lower the compressive, flexural, and tensile strengths. Despite having lowe r compressive strength than VA concrete, 100% RCA concrete had a compressiv e strength of 35 MPa (5,070 psi), which was well above the target strength of 25 MPa (3,630 psi). Trenching of the flexible pavement test sections and petrographic examination of the hardened concrete showed that after a simu lated life expectancy of 3.04 years for asphalt sections and 4.2 years for concrete sections, RCA has performed at least equally to VA.