SBS-SBR复合改性沥青的制备及贮存稳定性研究  

Study on Preparation and Storage Stability of SBS-SBR Composite Modified Asphalt

作　　者：王剑君 WANG Jianjun

机构地区：[1]甘肃省兰州公路管理局,甘肃兰州730000

出　　处：《城市道桥与防洪》2020年第9期190-193,M0019,M0020,共6页Urban Roads Bridges & Flood Control

摘　　要：采用物理共混方法,制备了一种SBS-SBR复合改性沥青,通过正交试验设计和极差分析研究改性剂对沥青性能指标的影响规律;测试SBS-SBR复合改性沥青软化点差指标,评价不同沥青配方的贮存稳定性,并对比糠醛抽出油和芳烃油2种相容剂对沥青贮存稳定性的改善效果。研究结果显示:SBS对沥青的软化点、针入度、黏度影响较大;SBR能够有效提高沥青的低温性能,对高温性能无明显改善效果;硫磺能够提高沥青的软化点和黏度,考虑沥青的施工和易性,硫磺掺量不宜大于0.2%;糠醛抽出油对沥青稳定性的改善效果优于芳烃油;SBS-SBR复合改性沥青的最佳材料组成:沥青、SBS、SBR、硫磺、糠醛抽出油的掺量之比为100%:7%:4.0%:0.20%:3.0%。A kind of SBS-SBR composite modified asphalt is prepared by physical blending method.The influence of modifiers on the asphalt performance indicators is studied through the orthogonal test design and range analysis.The softening point index of SBS-SBR composite asphalt is tested.The storage stabilities of different asphalt formulations are evaluated.And the effects of furfural extracted oil and aromatic oil on improving the storage stability of asphalt are compared.The study results show that SBS has a greater impact on the softening point,penetration and viscosity of asphalt.SBR can effectively improve the low-temperature performance of asphalt,but has no obvious effect on high temperature performance.Sulfur can increase the softening point and viscosity of asphalt.Considering the construction workability of asphalt,sulfur content should not be greater than 0.2%.The effect of furfural extraction oil on the asphalt stability is better than that of aromatic oil.The best material composition of SBS-SBR composite modified asphalt is that the ratio of asphalt,SBS,SBR,sulfur,furfural extracted oil is 100%:7%:4%:0.20%:3%.

关 键 词：改性沥青 物理共混 正交试验 路用性能 贮存稳定性 

分 类 号：U414[交通运输工程—道路与铁道工程]