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Title: PERFORMANCE OF RIGID PAVEMENTS CONTAINING RECYCLED CONCRETE AGGREGATES
Accession Number: 00740643
Record Type: Component
Record URL: Availability: Find a library where document is available Abstract: State highway agencies in Connecticut, Kansas, Minnesota, Wisconsin, and Wyoming have successfully designed and constructed rigid pavements containing recycled concrete aggregate (RCA). Success has been attributed in part to the minimization of old mortar content in the RCA during recycling processes, thereby controlling the total mortar content of the new portland cement concrete (PCC) mixture, or to the achievement of higher-than-expected compressive strengths through adjustments in mix proportions, or both. There was no clear correlation between mortar content and cracking distresses in field investigations, although one project did exhibit significantly more slab cracking in the recycled pavement than in the corresponding control pavement. The increased cracking may have been due to the large differences in total mortar content between the recycled and control sections. In general, the recycled PCC pavements considered in this study have performed comparably with their conventional PCC pavement counterparts, including the recycled pavements that incorporated RCA derived from concrete affected by D-cracking and alkali-silica reactivity (ASR). There is, however, evidence of small amounts of localized recurrent ASR in the recycled Wyoming pavement. Whether this reactivity will eventually develop into widespread distress remains to be seen.
Supplemental Notes: This paper appears in Transportation Research Record No. 1574, Advances in Concrete and Concrete Pavement Construction.
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Cuttell, G DSnyder, M BVandenbossche, J MWade, M JPagination: p. 89-98
Publication Date: 1997
Serial: ISBN: 0309059739
Features: References
(9)
; Tables
(6)
TRT Terms: Old TRIS Terms: Subject Areas: Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I32: Concrete
Files: TRIS, TRB, ATRI
Created Date: Sep 8 1997 12:00AM
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