Mj. Terro et Sa. Hamoush, EFFECT OF CONFINEMENT ON SILICEOUS AGGREGATE CONCRETE SUBJECTED TO ELEVATED-TEMPERATURES AND CYCLIC HEATING, ACI materials journal, 94(2), 1997, pp. 83-89
Citations number
15
Categorie Soggetti
Construcion & Building Technology","Material Science
This paper describes an experimental study of the behavior of confined
silicieous-aggregate concrete exposed to elevated temperature conditi
ons such as those experienced during fire. Locally produced gravel was
used as coarse aggregates in the concrete specimens tested. Equally s
paced steel rings were employed in the cylinders to simulate the effec
t of confinement on the material. Three different types of concrete sp
ecimens were tested: plain concrete cylinder, cylinders with six rings
, and cylinders with nine rings. The spacing between the rings is 28 a
nd 17.5 mm for the six- and nine-ring specimens, respectively. The cyl
inders were exposed to cycles of heating and cooling up to 700 C. Resu
lts have indicated an improvement in the residual compressive strength
up to about 30 percent and in the ductility of concrete at elevated t
emperatures due to the effect of confinement by ties.