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采用动稳定度DS、相对变形δ和综合稳定系数CSI评价沥青稳定碎石ATB-30的高温性能,以全面考察矿料级配和外加剂的影响。对3种级配的ATB-30进行车辙试验,分析了骨架嵌挤指数IVCA与DS、δ和CSI的关系;对掺不同外加剂和剂量的ATB-30进行车辙试验,分析不同外加剂和掺量对高温性能的影响。研究结果表明,骨架嵌挤指数IVCA与DS、δ和CSI具有良好的相关性,IVCA越小、级配骨架性越好,则混合料的高温性能越好;掺入外加剂能大幅提高ATB-30的高温性能,且随着外加剂剂量的增加,混合料的高温性能也大幅增大,不同的外加剂的效果存在较大差距;比起调整矿料级配,添加抗车辙剂是提高ATB-30高温性能的更为有效的措施。
Dynamic stability DS, relative deformation δ and integrated stability coefficient CSI were used to evaluate the high temperature performance of asphalt stabilized aggregate ATB-30, to comprehensively investigate the effects of aggregate gradation and admixtures. The rutting test was carried out on three graded ATB-30s. The relationship between IVCA and DS, δ and CSI was analyzed. The rutting test was carried out on ATB-30 with different admixture and dosage. Effect of amount on high temperature performance. The results show that the IVCA has a good correlation with DS, δ and CSI. The smaller the IVCA, the better the framework of the gradation, the better the high temperature performance of the mixture; the addition of the admixture can significantly improve the ATB- 30 high temperature performance, and with the increase in the dose of additives, the high temperature properties of the mixture also increased significantly, the effect of different additives there is a big gap; compared to adjust the mineral gradation, anti-rutting agent is to improve the ATB -30 High temperature performance of the more effective measures.