|
|
|
Title: MAINTENANCE RESEALING OF RIGID PAVEMENT JOINTS
Accession Number: 00153148
Record Type: Component
Availability: Find a library where document is available Abstract: Transverse joints in an existing portland cement concrete pavement were resealed to evaluate a number of sealers and sealing methods. Six liquids were installed, including asphalt cement, field-mixed rubber asphalt, two permixed rubber asphalts, polyvinyl chloride coal tar, and tar-modified polyurethane, as well as three preformed neoprenes. Liquid sealers were placed 50.8 to 63.5 mm (2 to 2-1/2 in.) deep in some joints and restricted to 12.7 mm (1/2 in.) deep in others. Some joints were sandblasted to determine the effect of clean joint faces on sealer performance. Three types of joints were resealed: (a) 25.4-mm (-in.) expansion joints spaced at 30.48 m (100 ft); (b) 6.3-mm (1/4-in.) sawed contraction joints spaced at 18.54 m (60 ft, 10 in.); and (c) 9.5-mm (3/4 in.) formed contraction joints spaced at 18.54 m (60 ft, 10 in.). Sealer performance has been evaluated over 3 winters, and pavement cores and sealer samples have been taken to observe sealer condition. All the neoprene sealers effectively seal the joints except along spalls. Some compression set has occurred in one brand but has not yet affected performance. The polyvinyl chloride sealer has generally performed best of the liquids, and the asphalt and field-mixed rubber-asphalt sealers generally performed best of the liquids, and the asphalt and field-mixed rubber-asphalt sealers generally performed poorly. Loss of adhesion between selaer and joint face is the most common failure mode for liquid sealers; entrapment of incompressible debris is a serious problem for asphalt and field-mixed rubber-asphalt sealers. Thorough joint cleaning was essential for some tested materials, but had no apparent effect on others. Generally, sealers placed 12.7 mm (1/2 in.) deep did not perform as well as those placed 50.8 to 63.5 mm (2 to 2-1/2 in.) deep.
Supplemental Notes: Publication of this paper sponsored by Committee on Pavement Maintenance. 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: Maintenance management, the federal role, unionization, pavement maintenance, and ice control Monograph Accession #: 01414349
Authors: Bryden, James EMcCarty, William MCocozzo, Louis JPagination: pp 37-44
Publication Date: 1976
Serial: ISBN: 0309025672
Media Type: Print
Features: Figures
(4)
; Photos; Tables
(4)
TRT Terms: Subject Areas: Highways; Maintenance and Preservation
Files: TRIS, TRB
Created Date: May 31 1977 12:00AM
More Articles from this Serial Issue:
|
