高模量剂与SBR复合改性沥青及其混合料性能研究

发布时间：2018-07-16 07:58

【摘要】：为改善高模量沥青混合料抗裂性能差等路面病害突出问题,通过对高模量剂与SBR复合改性沥青及其混合料性能系统研究,评价了不同PRM和SBR掺量下复合改性沥青针入度体系指标和PG分级,基于车辙、低温弯曲、浸水马歇尔、冻融劈裂和弯曲疲劳试验确定了PRM高模量剂和SBR适宜的掺量范围。试验结果表明:掺加SBR改性剂可显著改善高模量沥青混凝土的低温抗裂性和抗疲劳耐久性,PRM与SBR复合改性沥青可大幅改善高模量沥青以及SBR改性沥青混合料的综合路用性能,复合改性沥青混合料的抗疲劳耐久性优于SBS改性沥青混合料。实体工程和试验段检测结果表明,PRM与SBR复合改性沥青混凝土延长了道路的使用寿命,推荐最佳复合改性剂的掺配比例为2.5%SBR+0.6%PRM。
[Abstract]:In order to improve the outstanding problems of pavement diseases, such as poor crack resistance of high modulus asphalt mixture, a systematic study on the performance of high modulus asphalt and SBR composite modified asphalt and its mixture is carried out. Based on rutting, low temperature bending, immersion Marshall, freeze-thaw splitting and flexural fatigue test, the suitable range of PRM high modulus agent and SBR was determined by evaluating the penetration system index and PG grade of composite modified asphalt with different PRM and SBR contents, based on rutting, low temperature bending, immersion Marshall, freeze-thaw splitting and bending fatigue test. The experimental results show that the low temperature crack resistance and fatigue durability of high modulus asphalt concrete can be significantly improved by adding SBR modifier. The composite modified asphalt with PRM and SBR can greatly improve the high modulus asphalt and the comprehensive road performance of SBR modified asphalt mixture. The fatigue durability of composite modified asphalt mixture is better than that of SBS modified asphalt mixture. The test results of solid engineering and test section show that PRM and SBR composite modified asphalt concrete prolong the service life of road, and the best blending ratio of compound modifier is 2.5SBR / 0.6 PRM.
【作者单位】：重庆工程职业技术学院建筑工程学院;
【基金】：国家自然基金项目(51378068)
【分类号】：U414

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