SOME OBSERVATIONS ON RESURFACING PORTLAND CEMENT CONCRETE PAVEMENTS WITH BITUMINOUS MIXTURES
BITUMINOUS RESURFACING OF OLD CONCRETE PROVIDES A WATERPROOF ROOF OVER THE SUBGRADE AND FORMS A SMOOTH RIDING SURFACE WHICH REDUCES IMPACT ON THE CONCRETE BASE. BY THESE MEANS THE LOAD-CARRYING CAPACITY OF THE OLD SURFACE IS PRESERVED AND PERHAPS INCREASED. OLD CONCRETE PAVEMENTS IN THE AREA OF THE STUDY HAVING RESONABLY SATISFACTORY GRADES AND ALIGNMENTS MAY BE ECONOMICALLY RESURFACED WITH ABOUT A TWO-INCH THICKNESS OF RELATIVELY RICH DENSE GRADED BITUMINOUS CONCRETE LAID IN TWO LAYERS. THE MOST ECONOMICAL TIME TO APPLY A BITUMINOUS SURFACE IS WHEN IT IS ANTICIPATED THAT, AS AN ANNUAL AVERAGE, 1 TO 1.7 PERCENT OF THE AREA WOULD NEED TO BE PATCHED WITH CONCRETE IF THE ROAD WERE TO BE MAINTAINED AS A CONCRETE PAVEMENT. VERY LITTLE PATCHING IMMEDIATELY PRIOR TO RESURFACING IS JUSTIFIED. REMOVAL OF FAT BITUMINOUS PATCHES AND THE USE OF A LIGHT TACK COAT IS CONSIDERED GOOD PRACTICE. THE RESURFACING OF PAVEMENTS SUBJECT TO PUMPING CANNOT BE DEPENDED UPON TO STOP PUMPING PERMANENTLY. COVERING PUMPING CONCRETE WITH A LAYER OF DENSE GRADED GRANULAR MATERIAL PRIOR TO RESURFACING HAS BEEN EFFECTIVE IN STOPPING PUMPING. FORCING A RATHER HARD BITUMINOUS MATERIAL INTO THE VOIDS UNDER PUMPING PAVEMENTS IS BELIEVED TO BE A GOOD INVESTMENT, PARTICULARLY IF THE PAVEMENT IS TO BE RESURFACED. RESURFACES PLACED, AS OUTLINED ABOVE ON THE BASIS OF SERVICE RENDERED TO DATE, MAY BE ESTIMATED TO HAVE A LIFE OF TEN OR FIFTEEN YEARS WITH A VERY LOW MAINTENANCE COST. /AUTHOR/
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Supplemental Notes:
- Vol 26, pp 311-319, 1 FIG. 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.
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Authors:
- Woolley, W R
- Publication Date: 1947
Media Info
- Media Type: Digital/other
- Monograph Title: Proceedings of the Twenty-Sixth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 5-8, 1946
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Serial:
- Highway Research Board Proceedings
- Volume: 26
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Bituminous materials; Pavements; Portland cement concrete; Pumps; Resurfacing
- Subject Areas: Highways; Pavements;
Filing Info
- Accession Number: 00207327
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: May 22 1972 12:00AM