A STUDY OF DELAYED FINISHING OF CONCRETE SLABS
THE PERIOD OF ELAPSED TIME BEFORE THE SECOND SCREEDING OPERATION WAS INCREASED TO DETERMINE WHETHER THIS WOULD OVERCOME CERTAIN AIR-ENTRAINED CONCRETE PLACEMENT DIFFICULTIES. THE RESISTANCE OF THE CONCRETE TO FREEZING AND THAWING WAS DETERMINED TO ASCERTAIN WHETHER CONCRETE DURABILITY WAS ADVERSELY AFFECTED BY THE DELAYED FINISHING OPERATIONS. IT WAS INDICATED THAT: (1) FINISHING CAN BE DELAYED LONGER WITH CONCRETES MADE WITH BLENDED CEMENTS (15% NATURAL, 85% PORTLAND) AND AIR ENTRAINING CEMENT THAN WITH STANDARD PORTLAND CEMENT AND VIBRATED BLENDED CEMENT CONCRETE MIXTURE; (2) IN NO CASE DOES SHRINKAGE OR SWELL SERIOUSLY AFFECT FINISHING OR PAVEMENT SMOOTHNESS; (3) FREEZE THAW RESISTANCE IS NOT REDUCED; AND (4) MORE UNIFORM CONCRETE IS OBTAINED WITH AIR ENTRAINING CEMENTS OR CEMENT BLENDS, IN THE AMOUNTS FOUND THROUGH THIS RESEARCH. /AUTHOR/
- Record URL:
-
Supplemental Notes:
- Vol 27, pp 170-178, 7 FIG, 5 TAB. 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.
-
Authors:
- Swanberg, J H
- Publication Date: 1948
Media Info
- Media Type: Digital/other
- Monograph Title: Proceedings of the Twenty-Seventh Annual Meeting of the Highway Research Board Held at Washington, D.C. December 2-5, 1947
-
Serial:
- Highway Research Board Proceedings
- Volume: 27
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Air entrained concrete; Air entraining cement; Concrete; Concrete finishing; Freeze thaw durability; Location; Traffic delays
- Old TRIS Terms: Placement
- Subject Areas: Highways; Materials;
Filing Info
- Accession Number: 00213932
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Jul 2 1971 12:00AM