Abstract
This report describes an experiment on the mechanical properties of high-strength concrete (water cement ratio from 20% to 50%) tested during high-temperature heating (heating temperature from 100℃ to 600℃), and discusses the results. The following conclusions were obtained. 1) The compressive strength of the concrete tested during heating fell as the temperatue incrased from 100℃ to 200℃, recovered from 300℃ to 400℃, and fell again over 400℃. This shows a complicated change in concrete compressive strength. 2) High-strength concrete tested during high-temperature heating had higher compressive strength and Young's modulus than normal strength concrete under the same conditions.
