- Author
- Abrams, M. S. | Gustaferro, A. H. | Salse, E. A. B.
- Title
- Fire Tests of Concretes Joist Floors and Roofs.
- Coporate
- Portland Cement Assoc., Skokie, IL
- Report
- Research and Development Bulletin, 1971, 25 p.
- Keywords
- floors | roofs | aggregates | concrete slabs | fire resistance tests | reinforced concretes | expanded shale aggregates | thermal expansion
- Identifiers
- pan-joist slabs; restraints
- Abstract
- Fire tests (ASTM E 119-67) were conducted on eight concrete pan-joist floor specimens. The 14x18-ft specimens were made with carbonate, siliceous, or expanded shale aggregates. Joists were approximately 5 in. wide and 10 in. deep and were reinforced with Grade 60 reinforcing bars. Slabs were 2 1/2 in. or 5 1/4 in. thick. Two specimens had overlays of other types of concrete, and one was undercoated with a sprayed insulating material. Data are given on unexposed surface temperature, deflection, expansion, thermal thrust, and steel temperature during the tests. Comparative data on unexposed surface temperature are also included for fire tests of five reinforced concrete double-tee specimens. In each case, the fire endurance was determined by the criteria for temperature rise of the unexposed surface. An analysis is included of the effectson structural capacity of restraint of thermal expansion. "Interaction diagram envelopes" were calculated to determine the limiting values of the restraining forces that result in improved structural behavior.