Abstract
To control the increase in the temperature of steel materials during a fire, steel structures require fireproofing protections; recently, fireproof paints have been used for fireproofing. The coating of a steel frame at construction sites involves the application of a fireproof paint of the same color as the steel structure until the coated film is of a predetermined thickness. However, the difficultly in confirming the thickness visually results in insufficient or incomplete painting in some cases, which may lead to deterioration of the construction quality. In this study, we investigated materials that can easily color fireproof paints at construction sites, evaluated the adhesive property of these coatings by re-painting the fireproof paints, and conducted an accelerated deterioration test to confirm that the foaming characteristics of the fireproof paint films were suitable. To assess the construction quality of the colored fireproof paints, we evaluated the changes in the fireproof paint thickness caused by incomplete painting during the construction of the civil engineering steel structures, and confirmed the effectiveness of the coatings.
