【摘要】 将小粒径粉煤灰空心微珠(FAC)作为隔热填料掺入厚型钢结构防火涂料中,研究了FAC掺量对涂料理化性能及耐火性能的影响。结果显示:FAC掺量为8%时得到的防火涂料整体性能最优,灼烧3 h的背温低于市售防火涂层。利用数据模型对防火涂料耐火试验过程参数进行计算,求得固定和平均这2种形式的等效热阻,再以其模拟钢构件受火过程的温升情况,结果与实测基本一致。探讨了涂层表现出耐火性的原因。更多还原

【Abstract】 The small-sized fly ash cenospheres（FAC） were added as a heat-insulating filler to a thick fire resistive coating for steel structure. The effect of FAC content on the physicochemical and fire resistive properties of the coating was studied. The results showed that the fire resistive coating containing 8% FAC had the best comprehensive performance. The back-side temperature of the coating was lower than that of a commercial counterpart after burning for 3 hours. The process parameters of fire test for the fire resistive coating was calculated using two models, and the fixed equivalent thermal resistance and the average equivalent thermal resistance were obtained, which were then used to simulate the temperature rise of steel structure during the burning process. The simulated results were essentially in agreement with the measured results. The reason why the coating exhibits fire resistance was discussed.更多还原