民用机场水泥混凝土道面接缝嵌缝材料性能指标分析

Analysis on Performance Index of Joint Sealant Material for Civil Airport Cement Concrete Pavement

针对民用机场水泥混凝土道面接缝嵌缝材料出现的病害,通过分析其损坏原因,选取典型的4类机场水泥混凝土道面接缝嵌缝材料(硅酮类、聚氨酯类、聚硫类、聚硫氨酯类)进行基本物理特性、与接缝壁槽黏结性和耐候性3个方面的性能测试。结合试验结果及国内外接缝嵌缝材料相关技术规范及标准,根据23℃拉伸模量将材料分为高弹性模量和低弹性模量两种类型,将表干时间、锥入度、弹性恢复率、拉伸模量、低温拉伸量、定伸黏结性、抗燃油浸入性、抗热性和抗燃性定为机场水泥混凝土道面接缝嵌缝材料的性能指标,并给出各指标技术要求。

For the civil airport cement concrete joint sealing material disease, through analysing the causes of damage, selecting 4 kinds of typical airport cement joint sealing materials （silicone, polyurethane, polysulfide, polythiourethane ）, the performance test of basic physical properties, adhesion to joint and weather resistance is conducted. Combining with the experimental result and current domestic and foreign related technical specifications and standards of joint sealant materials, the materials are divided into types of high elastic modulus and low elastic modulus according to 23 ~C tensile modulus. Surface dry time, cone penetration, elastic recovery rate, tensile modulus, low temperature tensile elongation, fixed tensile bond, fuel immersion resistance characteristics, heat aging resistant and flame properties are defined as the performance indexes of airport cement concrete pavement joint sealing material, and the performance requirements are proved.