In order to optimize the interfacial bonding performance of polyurethane external wall insulation board,a high flame retardant polyurethane external wall insulation board with an oxygen index of 30.6％is prepared by using a foaming treatment method.After preparing external wall concrete specimens with a strength grade of 42.5 ordinary Portland cement,the interfacial bonding strength of the insulation board is analyzed under the conditions of different mortar ratios and different interface slotting of the insulation board and concrete bonding layer.The experimental re-sults show that after preparing adhesive mortar with 60.1 g cement,0.76 g adhesive powder,1.51 g organic silicon,and 31 g water,the interfacial bonding strength of insulation board,adhesive mortar and external wall concrete specimens is the highest under dry,wet and long-term drying condi-tions;Slotting a"#"shaped groove with a depth of 6 mm at the bonding interface of the insulation board,and the high flame retardant polyurethane external wall insulation board has the highest bonding strength and the best energy dissipation factor,with a bonding strength of 145.79 kPa.
关键词
高阻燃/聚氨酯/外墙保温板/界面粘接性能/氧指数
Key words
high flame retardant/polyurethane/external wall insulation board/interfacial bonding performance/oxygen index
维普
万方数据