无机填料对聚氨酯仿瓷砖性能的影响

以聚氨酯为胶料、粉煤灰和CaCO₃为填料制备了仿瓷砖，进行力学性能测试和SEM扫描分析。结果表明，填料的添加量为72~78%、压制强度为21~109 MPa时，添加粉煤灰和CaCO₃的仿瓷砖的最大破坏强度为3 300 N和2 300 N，最大断裂指数为50 MPa和35 MPa，最小耐磨损体积分别为289 mm³和445 mm³，最小吸水率为0.95%和0.85%。粉煤灰的综合增强作用好于CaCO₃。

Impacts of inorganic filling on properties of polyurethane imitation tile

We prepared imitation tiles with polyurethane as adhesive and fly ash and CaCO3 as filling.We also performed their mechanical performance test and SEM scanning analysis.Results show that the maximal rupture modulus of fly ash and CaCO3 filled imitation tile of 3 300 N and 2 300 N,the maximal damage strength of 50 MPa and 35 Mpa,the minimal wear resistance volume of 289 mm3 and 445 mm3 and the minimal water absorption rate of 0.95％ and 0.85％ are reached when filling content and forming strength are 72％ ～ 78％ and 21 ～ 109 MPa.The synthetical enhancement effect of fly ash is better than that of CaCO3.