摘要
预养护技术一方面可以提高沥青路面服役质量,另一方面可以有效延长沥青路面整体使用寿命。微罩面技术作为超薄磨耗层预防性养护技术的一种,厚度只有1.2 cm左右。相对于传统的超薄磨耗层技术,其经济型和适用性更好。微罩面技术作为路表功能层,其服役性能很大程度上取决于沥青混合料本身的粘结强度及微罩面与原路面的粘结强度,本研究从原材料选择、混合料设计、路面施工等角度进行了专门的优化,选择了两种微罩面技术沥青混合料进行试验研究,并且引进三种非常规沥青混合料试验--室内拉拔试验、室内斜剪试验和室内旋回车辙试验,对微罩面的实际路用性能进行评价,研究结果表明:通过专门优化,微罩面混合料本身的粘结性能及与原路面的粘结性能良好,是一种经济有效地预防性养护新技术。
The preventive maintenance technique can not only improve the service quality of asphalt pavement,but also effectively lengthen the whole service life of asphalt pavement. The micro-cover technique is one of preventive maintenance techniques for the ultra-thin wearing course. The thickness is only about 1.2 cm.Compared with the traditional ultra-thin wearing course technique, its economy and applicability are better. As the pavement functional layer, the service property of micro-cover technique depends on the adhesive strength of asphalt mixture, and the adhesive strength of micro cover and original pavement to a great extent. The article introduces the special optimization from the selection of raw material, design of mixture and construction of pavement, selects two micro-covered technical asphalt mixtures for the test and study, and introduces three kinds of unconventional asphalt mixture tests-indoor pull-out test, indoor inclined shear test and indoor cycle rutting test in order to evaluate the practical pavement performance of micro cover. The study result shows that the adhesive properties of micro-covered mixture itself and with the raw pavement are good through the special optimization. And it is a new economically and effectively preventive maintenance technique.
出处
《城市道桥与防洪》
2018年第1期147-151,共5页
Urban Roads Bridges & Flood Control
关键词
微罩面
预防性养护
粘结强度
拉拔试验
斜剪试验
旋回车辙试验
micro cover
preventive maintenance
adhesive strength
pull-out test
inclined shear test
cycle rutting test
