硅烷浸渍对高性能混凝土玻璃钢包覆复性能的影响

Effect of silane impregnating on the property of glass fiber reinforced plastic cladding for high performance concrete

针对高性能混凝土表面硅烷浸渍深度浅,玻璃钢包覆界面粘结强度低的问题,采用室内与工程应用试验,研究了硅烷浸渍对高性能混凝土玻璃钢包覆性能的影响。结果表明:硅烷浸渍后,不饱和聚酯玻璃钢和乙烯基酯玻璃钢与混凝土界面的粘结强度分别提高了51%和53%,静态浸泡加速老化后,二者与混凝土界面粘结强度保留率分别提高了25%和19%,硅烷浸渍能显著提高混凝土与玻璃钢界面的粘结强度和粘结耐久性。对于海洋环境中强度等级超过C40的高性能混凝土或者设计附加保护年限>20a的混凝土结构,硅烷浸渍与玻璃钢包覆复合防腐技术是提高其耐久性的有效解决方案。

Aiming at the problems of shallow silane impregnation depth on the surface of high performance concrete and low bonding strength of FRP cladding interface,laboratory and engineering application tests were used to study the effect of silane impregnation on the performance of high performance concrete FRP cladding.The results showed that after silane immersion,the bond strength between unsaturated polyester FRP and vinyl ester FRP and concrete was increased by 51%and 53%,respectively.After static immersion accelerated aging,the retention rate of the bond strength between the two and concrete was increased by 25%and 19%,respectively.The silane impregnation could significantly improve the bonding strength and interface bonding durability of the concrete and FRP interface.In the marine environment,for high-performance concrete with a strength level of more than C40 or a concrete structure with an additional protection period of more than 20 years,silane impregnation and glass fiber reinforced plastic cladding composite anti-corrosion technology was an effective solution to improve its durability.