Title:
High Strength Concrete at High Temperature
Author(s):
L.T. Phan
Publication:
Symposium Paper
Volume:
255
Issue:
Appears on pages(s):
1-22
Keywords:
elevated temperatures; explosive spalling; high-strength concrete; polypropylene fibers; pore pressure
DOI:
10.14359/20217
Date:
10/1/2008
Abstract:
Effects of elevated temperature exposure and various factors, including water-to-cementitious material ratios (w/cm), curing conditions, heating rates, test methods, and polypropylene (PP) fibers, on (1) pore pressure buildup and potential for explosive spalling and on (2) degradation of mechanical properties in normal-strength (NSC) and high-strength concrete (HSC) are presented. Degradations of mechanical properties were measured using 100 x 200 mm cylinders, heated to temperatures of up to 600 °C at 5 °C/min, and compared with results of other studies and existing codes. Pore pressures were measured using 100 x 200 x 200 mm blocks, heated to 600 °C at 5 °C/min and 25 °C/min. Experimental evidences of the complex, temperature-dependant moisture transport process that significantly influenced pore pressure and temperature developments are described.