利用片麻岩制备高等级路面沥青混合料研究

Research on High Grade Asphalt Pavement of Gneiss

针对酸性集料沥青混合料水稳定性差的特点,采用不同抗剥落措施,研究各种方案下沥青混合料的水稳定性能。对比试验表明,常规水稳定性试验在评价酸性集料沥青混合料水稳定性方面明显缺乏有效性和区分度。而通过增加冻融循环次数、调整空隙率,以n次冻融循环劈裂强度比(TCSR(n))来评价沥青混合料抗水损害能力的改进法,可较客观地评价不同抗剥落方案的优劣性及耐久性,并准确地反映路面早期的水损害情况。

The moisture susceptibility of asphalt mixtures were studied with various anti-stripping methods,according to the poor water stability of asphalt mixture with acidity aggregate.Comparative tests indicated that conventional tests significantly lack effectiveness and discriminability in evaluating water stability of asphalt mixture with acidity aggregate.The improved method introduced to evaluate asphalt mixture for resistance to water damage can distinguish superiority and durability of different anti-stripping methods,and accurately reflect water damage of pavement in early stage.