HIGH STRENGTH CONCRETE FOR THE WILLOWS BRIDGE
DESCRIBES THE CONTROL OF THE QUALITY OF CONCRETE FOR SITE-MADE PRECAST POST-TENSIONED BEAMS. IN THIS PROJECT, HIGH STRENGTH CONCRETE WAS PRODUCED BY USING A CLEAN, CUBICLE, DOLOMITE LIMESTONE COARSE AGGREGATE, WHICH HAD HIGHER STRENGTH PRODUCING PROPERTIES THAN GRAVEL AGGREGATE NORMALLY USED BY THE CONCRETE SUPPLIER. PRIOR TO CONSTRUCTION, LABORATORY TRIAL MIXES WERE MADE USING THE SUPPLIERS NORMAL GRAVEL AND OTHER AGGREGATES WHICH WERE SELECTED FOR THEIR STRENGTH PRODUCING PROPERTIES. AT A LATER DATE A MORE COMPREHENSIVE LABORATORY STUDY WAS MADE OF THE STRENGTH OF CONCRETE CONTAINING THE DOLOMITIC LIMESTONE AND GRAVEL COARSE AGGREGATES. THE RESULTS OF THESE TRIAL MIXES ARE DOCUMENTED. THE CURING AND TESTING OF SITE-MADE STANDARD CYLINDERS ARE DESCRIBED. AN EVALUATION OF THE COMPRESSIVE STRENGTH TESTS IS GIVEN, TOGETHER WITH SOME DISCUSSION OF THE FINAL RESULTS OBTAINED. THIS PROJECT DEMONSTRATED THAT WORKABLE, AIR ENTRAINED CONCRETE HAVING A MINIMUM 28 DAY COMPRESSIVE STRENGTH OF 6000 PSI CAN BE PRODUCED WITH MATERIALS READILY AVAILABLE IN ONTARIO, CANADA. /AUTHOR/
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Supplemental Notes:
- Vol 67, No 8, PP 611-619, 6 FIG, 5 TAB, 3 REF
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Authors:
- Burgess, A J
- RYELL, J
- Bunting, J
- Publication Date: 1970-8
Media Info
Subject/Index Terms
- TRT Terms: Air entrained concrete; Beams; Coarse aggregates; Compressive strength; Concrete; Concrete bridges; Dolomite; High strength concrete; Posttensioning; Quality control
- Uncontrolled Terms: Concrete beams
- Subject Areas: Bridges and other structures; Highways;
Filing Info
- Accession Number: 00209333
- Record Type: Publication
- Files: TRIS
- Created Date: Nov 3 1970 12:00AM