Fire Performance of High Strength Concrete: Research Needs.
Fire Performance of High Strength Concrete: Research
Needs.
(1092 K)
Phan, L. T.; Carino, N. J.
Advanced Technology in Structural Engineering. ASCE/SEI
Structures Congress 2000. Proceedings. May 8-10, 2000,
Philadelphia, PA, Elgaaly, M., Editor(s), 2000.
Keywords:
concretes; high strength concrete; compressive strength;
elastic modulus; spalling; fire tests; mechanical
properties; test methods
Abstract:
A compilation of fire test data which shows distinct
behavioral differences between high-strength concrete
(HSC) and normal strength concrete (NSC) at elevated
temperature is presented. The differences are most
pronounced in the temperature range of 20 {degrees}C to
400 {degrees}C. What is more important is the observed
explosive spalling of HSC speciments during fire tests.
However, no explanations were found for why spalling did
not occur in all HSC speciments. A comparison of test
results with current code provisions on the effects of
elevated temperatures on concrete strength shows that
the CEN Eurocodes and the CEB provisions are unsafe for
predicting mechanical properties of HSC. Aspects of
analytical modeling for predicting the buildup of
internal pressure during heating are also discussed. The
paper condludes with recommended research needs,
identified as a result of a workshop on fire performance
of HSC, convened at NIST in February 1997.
