|
|
|
Title: WASTE FIBERS IN CEMENT-STABILIZED RECYCLED AGGREGATE BASE COURSE MATERIAL
Accession Number: 00713592
Record Type: Component
Availability: Find a library where document is available Abstract: A coordinated laboratory and field study was undertaken to assess the suitability of producing an economically suitable pavement base course material by reinforcing cement-stabilized recycled concrete aggregate with strips of reclaimed plastic or tire wires and tire chunks from recycled scrap tires. The field program included constructing 12 test sections using different proportions of various waste materials. It was found that the addition of fibers exerted no measurable effect on field compaction, but the in-place mixing technique used was unsuccessful in distributing the fibers homogeneously throughout the full depth of the slab. Laboratory split tensile tests and beam flexural tests showed that reinforced specimens exhibited lower tensile and flexural strengths and no improvement in toughness compared with unreinforced specimens. The same basic recycled aggregate mix, when reinforced with a commercially available hooked-end steel fiber, showed that 28-day specimens with 4% fiber reinforcement exhibited a pseudo strain hardening behavior after the peak, accompanied by a modest increase in tensile strength and almost doubling in toughness. Notwithstanding the generally recognized benefits to be realized in a pavement system by an increase in toughness in one or more layers, the results of this study suggest that caution and careful investigation should be exercised when contemplating the incorporation of waste products in the component layers. Failure to do so may result in false economy whereby initial cost is reduced somewhat at the expense of increased life-cycle costs because the anticipated performance was not achieved.
Supplemental Notes: This paper appears in Transportation Research Record No. 1486, Environmental Testing and Evaluation of Stabilized Wastes, Performance of Stabilized Materials, and New Aggregate Tests. 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
Monograph Title: Monograph Accession #: 01399784
Language: English
Authors: Cavey, J KKrizek, R JSobhan, KBaker, W HPagination: p. 97-106
Publication Date: 1995
Serial: Features: Figures
(7)
; References
(14)
; Tables
(2)
TRT Terms: Uncontrolled Terms: Subject Areas: Construction; Economics; Environment; Geotechnology; Highways; I42: Soil Mechanics
Files: TRIS, TRB
Created Date: Nov 22 1995 12:00AM
More Articles from this Serial Issue:
|
