Effect of Method Preparation of Ends of Concrete Cylinders for Testing
Final rept. Oct 1960-Jun 1965
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
Pagination or Media Count:
The purpose of this program was to investigate the effects of the strength and surface condition of the several materials commonly used for capping concrete cylinders and various degrees of restraint of the capping material on the apparent strength of concretes of different strength levels. The program was divided into four phases. Phase I incorporated an experimental method of preparing specimens utilizing light steel rings to confine a gypsum plaster cap on the end of the specimen during testing. Variables included strength of concrete, use of rings, strength of capping material, and cleanliness of the cap surface. Phase 2 extended the investigation to very high- strength concrete and utilized medium-thick rings and a sulfur-silica capping compound. Unexpected results with the medium-thick rings dictated additional work with very thick rings, Phase 3. In Phase 4, a high-strength sulfur capping compound was evaluated.
- Ceramics, Refractories and Glass
- Test Facilities, Equipment and Methods