THE PARTIAL REPLACEMENT OF PORTLAND CEMENT IN CONCRETE
SIXTEEN REPLACEMENT MATERIALS, INCLUDING REPRESENTATIVES OF SIX CLASSES-BLAST-FURNACE SLAG, NATURAL CEMENT, FLY ASH, VOLCANIC GLASS, CALCINED OPALINE SHALE, AND UNCALCINED DIATOMITE--WERE INVESTIGATED TOGETHER WITH FIVE PORTLAND CEMENTS: TWO TYPE I CEMENTS, OF LOW AND HIGH-ALKALI CONTENT, A TYPE II, A TYPE III, AND A TYPE IV. THE 16 MATERIALS WERE USED AS PARTIAL REPLACEMENTS OF THE PORTALND CEMENT IN VARIOUS PERCENTAGES BY SOLID VOLUME FROM 8 TO 70. THE PERFORMANCE OF THE REPLACEMENT MATERIALS IN CONCRETE WAS RATED AGAINST SELECTED VALUES FOR CERTAIN PROPERTIES REGARDED AS CRITICAL FOR STRUCTURAL AND MASS CONCRETES. STRUCTURAL CONCRETE (0.5 WATER-CEMENT RATIO) WAS REGARDED AS ADEQUATE IF ITS BLEEDING DID NOT EXCEED 5 PERCENT, ITS PERMEABILITY DID NOT EXCEED 25, ITS RESISTANCE TO LABORATORY FREEZING AND THAWING WAS AT LEAST 60, ITS SHRINKAGE DID NOT EXCEED 0.070 PERCENT AT 180 DAYS, AND ITS COMPRESSIVE STRENGTH AT 28 AND 90 DAYS WAS AT LEAST 3000 AND 4000 PSI, RESPECTIVELY. MASS CONCRETE (0.8 WATER-CEMENT RATIO) WAS RATED AGAINST THE FOLLOWING FACTORS: BLEEDING NOT EXCEEDING 7 PERCENT, PERMEABILITY NOT EXCEEDING 10, AND COMPRESSIVE STRENGTH AT 3 AND 90 DAYS AT LEAST 500 AND 2000 PSI, RESPECTIVELY. IN ADDITION, CREDIT WAS GIVEN FOR THE DEGREE TO WHICH THE HEAT OF HYDRATION WAS REDUCED BY THE USE OF THE REPLACEMENT MATERIALS. /AUTHOR/
-
Supplemental Notes:
- No 205, pp 37-73, 20 TAB, 16 REF
-
Authors:
- Mather, B
- Publication Date: 1956
Media Info
Subject/Index Terms
- TRT Terms: Bleeding; Calcines; Compressive strength; Concrete; Equipment replacement; Fly ash; Freeze thaw tests; Glass; Heat of hydration; Mass concrete; Permeability; Portland cement; Shale; Shrinkage; Slag; Water cement ratio
- Uncontrolled Terms: Replacement
- Subject Areas: Highways; Maintenance and Preservation; Materials;
Filing Info
- Accession Number: 00212711
- Record Type: Publication
- Files: TRIS
- Created Date: May 13 1994 12:00AM