复合发泡型地聚物基防火保温板材的制备与性能

Preparation and Performance of Composite Foamed Geopolymer Based Fireproof Thermal Insulation Boards

摘要:

针对传统有机保温材料易燃、无机保温材料隔热性能不足的问题，本文对矿渣粉基无机地聚物胶凝发泡材料和有机可膨胀聚苯乙烯（EPS）泡沫进行复合改性，通过引入可再分散胶粉和玻璃纤维构筑协同增强体系，探究EPS颗粒用量对防火保温板材密度、抗压强度及保温效果的影响规律，并考察其防火性能和燃烧行为。结果表明：所研制防火保温板材密度仅为176 kg/m³，导热系数低至0.049 W/（m·K），经耐火性能测试（200 ℃，60 min）其背温保持在57 ℃以下；板材的燃烧热值低至1.25 MJ/kg，燃烧增长速率指数为11.5 W/s，600 s的总热释放量仅为1.1 MJ。

Abstract:

To address the flammability of traditional organic insulation materials and the insufficient thermal insulation performance of inorganic counterparts， this study focuses on the composite modification of slag powder based inorganic geopolymer cementitious foam materials and organic expandable polystyrene （EPS） foam. By introducing redispersible polymer powder and glass fiber to construct a synergistic reinforcement system. The influence of EPS bead content on the density， compressive strength， and thermal insulation performance of the boards was systematically investigated， with particular emphasis on evaluating their fire resistance and combustion behavior. Results demonstrate that the fireproof insulation board exhibited a density of 176 kg/m³ and an ultralow thermal conductivity of 0.049 W/（m·K）. During the fire resistance test （200 °C， 60 min）， the backside temperature remained below 57 °C. The target board displayed a combustion heat value as low as 1.25 MJ/kg， with a fire growth rate index of 11.5 W/s and total heat release of merely 1.1 MJ within 600 s.