고온을 받은 콘크리트의 색상변화와 잔존압축강도

Compressive strength-color change relation in concrete at high temperature

The purpose of this study is to investigate the relation between color change and residual compressive strength in concrete exposed to high temperature. In order to study the color image analysis, the specimens have been tested with variables of concrete strengths(20Mpa, 40Mpa, 60Mpa) in transient heating conditions($800^{\circ}C$ heating and 2 hour preservation). The results show that the residual strength of specimens are coincident with the full development of the pink/red color and the method may be used to define the distance from a heated surface where strength degradation has occurred.