Review of Mechanical Properties of HSC at Elevated Temperature.
Review of Mechanical Properties of HSC at Elevated
Phan, L. T.; Carino, N. J.
Journal of Materials in Civil Engineering, Vol. 10, No.
1, 58-64, February 1998.
concretes; compressive strength; elastic moduli;
spalling; fire tests; high strength concrete; test
methods; temperature; mechanical properties
A compilation of experimental results on the mechanical
properties of concrete when exposed to rapid heating as
in a fire are presented. Emphasis is placed on
concretes with high original compressive strengths, that
is, high-strength concretes (HSCs). The compiled test
data were categorized by the test methods and the types
of aggregate used and compared for behavioral
differences. The comparison revealed distinc difference
in mechanical properties of HSC and normal-strength
concrete (NSC) in the range between room temperature and
approximately 450 deg C. The differences narrowed at
temperature above 450 deg C. Also presented is a
comparison of these test results with existing code
provisions on the effects of elevated temperature on
concrete strength. It is shown that the Eurocode
provisions and the Comites Euro-International Du Beton
(CEB) design curves are more applicable to NSC than to
HSC. In fact, these provisions are unsafe when compared
with HSC test results. The study showed a lack of
experimental data for lightweight HSC and HSC heated
under a constant preload to simulate the stress
conditions in HSC columns.