When exposed to high temperature like in a fire, a concrete structure sees its compressive strength and elasticity degraded, accompanying with a crack, a spalling and a change in color. The purpose of this study is to identify the relationship…
When exposed to high temperature like in a fire, a concrete structure sees its compressive strength and elasticity degraded, accompanying with a crack, a spalling and a change in color. The purpose of this study is to identify the relationship between temperature change and a change in color and a decrease in compressive strength in a heat exposed concrete structure. For this study, we manufactured a concrete specimen and heated it until it hit the variable temperatures of 100, 200, 300, 400, 500, 600, 700, and 800℃, whereupon the color change and the residual compressive strength were measured for analysis. The result of the study shows that color change and residual compressive strength in a concrete structure exposed to high temperature have a consistent relationship, therefore, it may be possible to know how much compressive strength of the concrete reduces by measuring color changes and estimating heating temperature.