摘要
为分析富油RAP热再生沥青混合料的路用性能,分别对不同RAP(富油RAP)掺量的AC-20沥青混合料进行抗高温、抗低温、抗水损坏和抗疲劳性能试验。研究结果表明,随着RAP和富油RAP掺量的增加,可以显著降低热再生沥青混合料中新沥青用量,且沥青混合料低温抗裂性能和抗疲劳性能降低,而高温抗车辙能力增强,抗水损害能力先增加后降低,RAP-20(15)和RAP-50(20)热再生沥青混合料的低温性能和水稳定性已无法满足规范要求;当RAP掺量为40%(富油RAP掺量15%)时,热再生沥青混合料综合路用性能较好,因此建议RAP掺量不宜超过40%,其中富油RAP掺量不宜超过15%。
In order to investigate the road performance of oil-rich RAP hot recycled asphalt mixtures,AC-20 asphalt mixtures with different RAP(oil-rich RAP)contents were tested for their resistance to high temperature,low temperature,water damage and fatigue.The results show that with the increase of RAP or oil-rich RAP,the new asphalt dosage in the hot recycled asphalt mixture decreases significantly,and the low-temperature crack resistance and fatigue resistance of asphalt mixture decreases,while the high-temperature rutting resistance increases,and the water damage resistance increases first and then decreases.The low-temperature performance and water stability of RAP-20(15)and RAP-50(20)hot recycled asphalt mixtures can no longer meet the specification requirements.When the RAP dose of 40%,including oil-rich RAP is 15%,the comprehensive road performance of hot recycled asphalt mixture is improved,so it is suggested that the RAP content should not exceed 40%,including oil-rich RAP content should not exceed 15%.
作者
张晋媛
Zhang Jinyuan(Shanxi Province Transportation Planning Surveying and Designing Institute Co.Ltd.,Taiyuan 030000,China)
出处
《石家庄铁道大学学报（自然科学版）》
2022年第1期120-126,共7页
Journal of Shijiazhuang Tiedao University(Natural Science Edition)
