CAJ | 학술논문

泡沫材料导热性能评价与测试方法密切相关，为阐明瞬态法和稳态法对测试无机泡沫材料导热系数的适应性，在介绍两种导热系数测试方法原理基础上，以干密度200～300 kg/m3的自制泡沫地质聚合物和市售泡沫混凝土为研究对象，比较了两种测试方法对含宏观气孔(φ≥0.5 mm)的无机泡沫材料导热性能测试结果及其差异。结果表明：(1)在测试不同干密度等级无机泡沫材料导热系数时，稳态法比瞬态法低0.0085～0.0205 W/(m·K)，而且这种差别随材料干密度增大(导热系数增大)而增大；(2)干密度等级相同时，自制泡沫地质聚合物具有与市售泡沫混凝土相当或更低的导热系数，可望用于新型建筑保温材料；(3)稳态法比瞬态法更适用于具有宏观气孔无机泡沫材料导热性能测定。
포말재료도열성능평개여측시방법밀절상관，위천명순태법화은태법대측시무궤포말재료도열계수적괄응성，재개소량충도열계수측시방법원리기출상，이간밀도200～300 kg/m3적자제포말지질취합물화시수포말혼응토위연구대상，비교료량충측시방법대함굉관기공(φ≥0.5 mm)적무궤포말재료도열성능측시결과급기차이。결과표명：(1)재측시불동간밀도등급무궤포말재료도열계수시，은태법비순태법저0.0085～0.0205 W/(m·K)，이차저충차별수재료간밀도증대(도열계수증대)이증대；(2)간밀도등급상동시，자제포말지질취합물구유여시수포말혼응토상당혹경저적도열계수，가망용우신형건축보온재료；(3)은태법비순태법경괄용우구유굉관기공무궤포말재료도열성능측정。
The assessment of thermal insulation of porous materials is closely related to the adopted test methods. In order to examine the suitability of steady state method and transient method for testing the thermal conductivity of inorganic porous materials, two methods were used to test the foam geopolymers prepared in laboratory and commercial foam concrete, which have a dry density of 200~300kg/m3, and with macropore diameter larger than 0.5mm (φ≥0.5mm). Results show that, for foam geopolymer with different dry densities, the thermal conductivity tested with steady state method was about 0.008 5~0.020 5 W/(m·K) smaller than that with transient method, and the higher the density is, the larger the differences. For the foam geopolymer and commercial foam concrete at a same density level, foam geopolymer shows a compa-rable or lower thermal conductivity than traditional foam concrete, suggesting it has a potential to be used as a new type of thermal insulation material. For the inorganic porous materials with macro pores, steady state method is more suitable than transient method for the accurate measurement of thermal conductivity.