STUDY ON PREDICTION METHOD FOR INSULATION OF DOUBLE-LAYER STRUCTURE USING "INCLUSIVE THERMAL CONDUCTIVITY" IN FIRE-RESISTANCE TEST

Kimie YOSHITANI, Takafumi SHIMIZU, Masatomo YOSHIDA
2019 Journal of Environmental Engineering (Transactions of AIJ)  
A method for predicting the unexposed surface temperature of a double-layer wall is proposed based on "inclusive thermal conductivity," which considers heat and moisture transfer and influence of cracks in materials. Fire-resistance tests were conducted on specimens with fiber-reinforced cement siding and gypsum boards overlaid. Inclusive thermal conductivities are estimated based on the temperature of fire-resistance tests results. In order to estimate that unexposed surface temperature of
more » ... lar double-layer specimen whose thickness of gypsum board layer is decreasing, the number of inclusive thermal conductivities are reduced. Calculations using this inclusive thermal conductivity sufficiently captured the temperature history. A method for predicting the unexposed surface temperature of a double-layer wall is proposed based on "inclusive thermal conductivity," which considers heat and moisture transfer and influence of cracks in materials. Fire-resistance tests were conducted on specimens with fiber-reinforced cement siding and gypsum boards overlaid. Inclusive thermal conductivities are estimated based on the temperature of fire-resistance tests results. In order to estimate that unexposed surface temperature of similar double-layer specimen whose thickness of gypsum board layer is decreasing, the number of inclusive thermal conductivities are reduced. Calculations using this inclusive thermal conductivity sufficiently captured the temperature history.
doi:10.3130/aije.84.1 fatcat:xa7gosqi6rcr7gys5n56uimexy