ARE 4 X 8-INCH CONCRETE CYLINDERS AS GOOD AS 6 X 12-INCH CYLINDERS FOR QUALITY CONTROL OF CONCRETE?
The 4 x 8-inch (10 x 20-CM) concrete cylinders are not as good as 6 x 12-inch (15 x 30-cm) cylinders for quality control of concrete. The compressive strengths of the former are generally higher than those of the latter. Below 300 psi, the average value of the ratio of the strength of the two sizes of cylinders at 28 days is 1.09; above 3000 psi the corresponding value of the ratio reaches 1.16. The standard deviation of the compressive strength of test cylinders increases with a decrease in the cylinder diameter. The average value of the standard deviation of 28-day test results for 3000- psi strength level is 179 psi for 4 x 8-inch (10 x 20-cm) and 37 psi for 6 x 12-inch (15 x 30-cm) cylinders.
Canadian Department of Energy, Mines and Resources580 Booth Street
Ottawa, Ontario K14 OE4, Canada
- Malhotra, V M
- Publication Date: 1973-5
- Features: Appendices; Figures; Photos; References; Tables;
- Pagination: 47 p.
- TRT Terms: Compressive strength; Concrete; Physical properties; Quality control; Standard deviation
- Uncontrolled Terms: Concrete properties; Cylinders
- Subject Areas: Highways; Materials;
- Accession Number: 00261541
- Record Type: Publication
- Report/Paper Numbers: IR 72-35
- Files: TRIS
- Created Date: Oct 22 1974 12:00AM