Title:
Compressive Strength of Lightweight
High-Strength Concrete Subjected to
High Temperatures
Author(s):
G.Y. Kim, Y.S. Kim, and T.G. Lee
Publication:
Symposium Paper
Volume:
261
Issue:
Appears on pages(s):
287-296
Keywords:
compressive strength; high-strength concrete; high temperature; lightweight aggregate; strain at peak stress; stress-strain curve.
DOI:
10.14359/51663218
Date:
10/1/2009
Abstract:
In this study, the effects of high temperature on mechanical properties
of high strength concrete were experimentally investigated. The effect of elevated temperatures ranging from 20 to 700 °C (68 to 1292 °F) on the material mechanical properties of normal-weight and lightweight aggregate high-strength concrete of 60 MPa grade was evaluated. Tests were conducted on Ø100 × 200 mm (3.94 × 7.87 in.) cylinder specimens. The specimens were tested under both stressed and unstressed conditions. The specimens were preloaded to 20 and 40% of their ultimate compressive strength at room temperature and subjected to temperatures ranging from 100 to 700 °C (212 to 1292 °F), and the compressive strength compared to that
observed at 20 °C (68 °F).