高性能微表处的室内试验研究

Experimental Study on High Performance Micro surfacing

摘要:

微表处是一种常见的预防性养护技术，然而在高温多雨的广东地区，微表处罩面存在耐磨耗性能差，使用寿命短等缺点，严重阻碍了该技术在广东高速公路的推广应用.为此，开发了新型微表处技术——高性能微表处，该技术的核心是通过掺入适当比例的水性环氧树脂和水性环氧固化剂，使其在室温环境下发生化学交联反应，形成高粘结性能的空间网状结构.室内湿轮磨耗试验结果表明，相对于常规微表处，高性能微表处的耐磨耗性能和抗水损坏性能提高了约60%.长期路用性能结果表明，高性能微表处的抗滑性能和抗剥落性能均明显优于常规微表处.

Abstract:

Micro surfacing is widely used as an effective technology of preventive maintenance. However, for high temperature and rainfall in Guangdong region, micro surfacing has many disadvantages, such as poor abrasion resistance and short life ,which seriously influence the application of preventive maintenance in Guangdong province. Therefore, this study developes a new type of micro surfacing technology—epoxy high performance micro surfacing. The core of the new type of micro surfacing is adding an appropriate proportion water based epoxy resin and waterborne epoxy curing agent in micro surfacing mixture.water based epoxy resin and waterborne epoxy curing agent have chemical reaction ,which form high performance bonding network structure of space. Indoor wet wheel wear test results show that anti wear and resistance to water damage of epoxy high performance micro surfacing improves about 60%, compared with conventional micro surfacing. Based on driving wheel pavement analyzer, the indoor accelerated test on epoxy high performance micro surfacing showes that the anti sliding and anti spalling performance of epoxy high performance micro surfacing is significantly superior to conventional micro surfacing.