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鉴于国内外对开级配沥青磨耗层混合料(OGFC)施工工艺的差异,从室内成型试件所需的击实功着手,采用马歇尔击实和旋转成型方法,对最大粒径13 mm的OGFC材料设计时的马歇尔击实次数展开研究。与马氏成型方法相比,旋转65次得到的试件空隙率与马氏击实50次的试件空隙率相近,旋转100次的试件空隙率与马氏击实65次的试件空隙率相近。对比美国FHWA要求的旋转压实次数,建议OGFC材料设计时,标准的马氏击实次数应提高至65次,以适应我国的较重轴载,确保OGFC真正达到骨架稳定状态。
In view of the difference of construction technology of open graded asphalt mixture (OGFC) both at home and abroad, from the compaction work required for indoor forming test specimens, Marshall compaction and rotational molding methods were used to measure the maximum diameter of OGFC Marshall compaction of materials design time to study. Compared with the Markov forming method, the void ratio of the specimen obtained after 65 revolutions is similar to that of the specimen obtained 50 times by Marsh compaction, and the void ratio of the specimen rotated 100 times is the same as that of the specimen void Similar rate. Compared with the number of rotary compaction required by FHWA in the United States, it is suggested that the standard Mach number should be increased to 65 times when designing OGFC materials to meet the heavier axle load of our country to ensure that the OGFC can reach the skeleton stable condition.