Title:
Effect of Confinement on Siliceous Aggregate Concrete Subjected to Elevated Temperatures and Cyclic Heating
Author(s):
Mohamad J. Terro and Samir A. Hamoush
Publication:
Materials Journal
Volume:
94
Issue:
2
Appears on pages(s):
83-89
Keywords:
concrete; confinement; ductility; fire; heating cycles;
modulus of elasticity; residual compressive strength; temperature;
DOI:
10.14359/288
Date:
3/1/1997
Abstract:
This paper describes an experimental study of the behavior of confined siliceous aggregate concrete exposed to elevated temperature conditions such as those experienced during fire. Locally produced gravel was used as coarse aggregates in the concrete specimens tested. Equally spaced steel rings were employed in the cylinders to simulate the effect of confinement on the material. Three different types of concrete specimens were tested: plain concrete cylinder, cylinders with six rings, and cylinders with nine rings. The spacing between the rings is 28 and 17.5 mm for the six and nine-ring specimens, respectively. The cylinders were exposed to cycles of heating and cooling up to 700 C. Results have indicated an improvement in the residual compressive strength up to about 30 percent, and in the ductility of concrete at elevated temperatures due to the effect of confinement by ties.