多种气候作用下环氧沥青混凝土表面抗滑性能试验研究

Test and Research on Skid Resistance of Epoxy Asphalt Concrete under Various Climate Conditions

为了研究多种气候作用下环氧沥青混凝土的表面抗滑性能,选取沙尘气候、雨水气候和冰冻气候作为不利气候条件,以摆值（BPN＊）表征抗滑值,分析了在不利气候作用下环氧沥青混凝土表面摆值的变化规律。研究结果表明,在沙尘气候作用下,与湿润状态相比,路表面抗滑性能在干燥状态下随着沙尘等级提高而下降更加明显;冰冻气候作用对抗滑性能的影响存在明显的冰晶、冰膜、积水3个阶段;与初始干燥清洁状态相比,干燥沙尘气候的路表面抗滑值下降幅度达到23%-44%,小雨量、大雨量作用时的表面抗滑值分别下降20%和30%左右,冰冻气候作用3个阶段路表面抗滑值下降幅度分别为40%、70%和30%。

In order to study the impact of various climate conditions on skid resistance of epoxy asphalt concrete, three unfavorable climate types are selected which are dust climate, rainwater climate and freezing climate. British pendulum number （BPN ＊ ） is chosen to represent skid resistance, and the variation laws of BPN are analyzed. Results show that under dust climate condition, the surface skid resistance in dry state declines more obviously than in wet state as dust levels rise- influence of freezing climate on anti-sliding performance exists in three stages：ice, ice film and water-logging; and compared with in the initial state of dry and clean pavement, the surface skid resistance falls by 23%-44% when the dry pavement is exposed in dust climate, falls almost by 20% or 30% when the rainfall is little or big and falls by 40%, 70% and 30% respectively in the three stages of freezing climate effects.