SAFE COMBINATIONS OF MIX PROPORTIONS, TEMPERATURE AND PROTECTION TIME IN WATER CONCRETING
THE PROBLEM FOR WINTER CONCRETING PRACTICE IS TO CONVERT THE NECESSARY PREHARDENING TIME INTO ACTUAL TIME UNITS FOR STRUCTURAL CONCRETE MEMBERS. A CONCRETE STRUCTURE SHOULD BE PROTECTED AGAINST FREEZING DURING A PERIOD CORRESPONDING TO THE NECESSARY PREHARDENING TIME. THE PROTECTION CAN BE PROVIDED BY COVERINGS AND INSULATION. THE PREHARDENING TIME CAN BE DETERMINED FROM THE TEMPERATURE HISTORY WHICH IS DEPENDENT ON MANY VARIABLES. THESE VARIABLES ARE DISCUSSED' WATER-CEMENT RATIO, MATURITY FACTOR, CONCRETE COMPOSITION, AND CEMENT CONTENT. AN EXAMPLE IS GIVEN COMPUTING HARDENING TIME FROM THE TEMPERATURE HISTORY VARIABLES GIVEN IN A TABLE OF RULES.
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Supplemental Notes:
- 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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Corporate Authors:
Highway Research Board (HRB)
Washington, DC -
Authors:
- Jessing, Jorn
- Publication Date: 1966
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 425-430
- Monograph Title: Symposium on structure of Portland cement paste and concrete
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Serial:
- Highway Research Board Special Report
- Issue Number: 90
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Cement content; Cold weather; Concrete construction; Concrete hardening; Freezing; Hardness; Operations; Protection; Temperature; Time; Water cement ratio
- Old TRIS Terms: Determination; Maturity factor
- Subject Areas: Administration and Management; Highways; Materials; Security and Emergencies;
Filing Info
- Accession Number: 00212280
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Nov 18 1994 12:00AM