Tourmaline改性沥青混凝土路面降温性能研究

发布时间：2018-07-04 16:04

本文选题：道路材料 + tourmaline　；参考：《功能材料》2014年11期

【摘要】：为解决夏季沥青路面温度过高问题,研发了tourmaline改性沥青,制备了tourmaline改性沥青混凝土。从试件制备、试验仪器、测温点及隔热方式等方面确定了最合理的路面测温试验方法,在此基础上,系统研究了外界温度及tourmaline掺量和类型对tourmaline改性沥青路面降温性能的影响规律,并对tourmaline改性沥青混凝土的降温机理与路用性能进行了分析。结果表明,tourmaline可显著降低沥青路面的温度;外界温度越高,tourmaline对沥青混凝土的降温效果越好;随tourmaline掺量的增加,tourmaline改性沥青混凝土的降温性能不断提高,当掺量超过17%时,其降温性能变化不明显;tourmaline负离子粉的降温性能较tourmaline粉更佳,其降温性能随负离子释放量的增大而提高,当负离子释放量超过5 000 ions时,tourmaline的降温性能相差不大;tourmaline的添加能够显著改善沥青混凝土的高温性能、低温性能及水稳定性等路用性能。
[Abstract]:In order to solve the problem of excessive temperature of asphalt pavement in summer, tourmaline modified asphalt was developed and tourmaline modified asphalt concrete was prepared. The most reasonable road surface temperature measurement test method is determined from the aspects of sample preparation, test instrument, temperature measuring point and heat insulation method, etc. On this basis, The influence of external temperature, tourmaline content and type on the cooling performance of tourmaline modified asphalt pavement is systematically studied, and the cooling mechanism and road performance of tourmaline modified asphalt concrete are analyzed. The results show that tourmaline can significantly reduce the temperature of asphalt pavement, the higher the external temperature, the better the cooling effect of asphalt concrete, and the higher the content of tourmaline is, the better the cooling performance of tourmaline modified asphalt concrete is. The cooling performance of tourmaline anion powder is better than that of tourmaline powder, and the cooling performance increases with the increase of the amount of negative ion release. When the amount of negative ions released exceeds 5 000 ions, the cooling performance of tourmaline is similar. The addition of tourmaline can significantly improve the performance of asphalt concrete at high temperature, low temperature and water stability.
【作者单位】：长安大学公路学院;石家庄市交通运输局;河南卢阳高速公路有限公司;
【基金】：国家自然科学基金资助项目(51208045) 高等学校博士学科点专项科研基金资助项目(20110205120007) 中央高校基本科研业务费专项资金资助项目(CHD2010JC065,2014G2210002) 交通运输部建设科技资助项目(201331849A270)
【分类号】：U414

【参考文献】