沥青路面抗凝冰损伤功能性修复材料试验研究

Research on Functional Repairing Material for Asphalt Pavement to Resist Condensate Ice Damage

针对冬季云、贵高原地区路面凝冰对表层沥青混合料造成的微损伤,研发高黏结力、高渗透性沥青路面抗凝冰损伤功能性修复材料,以防治沥青路面表层细集料剥落及麻面现象的产生.研究了SBR改性剂及G助剂对该修复材料常规物理性能、渗透性能及黏附性能的影响.结果表明:与SBR复配改性后,G助剂可使沥青路面抗凝冰损伤功能性修复材料的渗透性能显著提升,对路表构造深度影响小,有助于提高原位修复效果,而且对该修复材料蒸发残留物弹性恢复性能具有促进作用,但对其5℃延度有不利影响;随固化时间的延长,沥青路面抗凝冰损伤功能性修复材料对湿轮磨耗试件表面细集料的黏附效果优异,其抗水及抗冻融性能较未修复或喷洒普通乳化沥青试件显著提高.

As to the microscopic damage of asphalt mixture road surface caused by winter freezing in the Yunnan-Guizhou plateau region, the research on functional repair of asphalt pavement was carried out by developing adhesive and permeable materials in order to prevent fine aggregate from stripping and pitting. With SBR and G additive as modifiers, the study was focused on the changes of repairing materials in terms of physical properties, permeability and adhesion to different modifier. The results show that the permeability of repairing materials enhances rapidly with the increase of G additive, which does not have much effect on skid resistance of the original road surface, therefore, the remediation effect is enhanced. The evaporation residue has better elastic recovery, but the 5 ~C ductility is adversely affected. With in creasing curing time, better performances in adhesion, water resistance and freeze-thaw resistance are obtained compared with samples without repairing materials added. This study is of significance in developing the preventive maintenance technology in areas with local characteristics.