SAC型沥青路面冷灌缝材料黏附性能研究

摘要

On the basis of the characteristics of SAC-sealant, an adhesion performance evaluation method based of the frac-ture energy theory was established. The effects of different additives on the adhesive performance of sealant were investigated, and mechanism was studied as well. The results indicate that the tensile and shear fracture energy between SAC-sealant and the original pavement can be greatly improved by the addition of AR and SBR compared to other additives. And there is a positive correlation between the fracture energy and the amount of AR or SBR. The fracture energy between SAC-sealant with AR and the original pavement is mainly affected by the improvement of ultimate bond value. The addition of AR improves the ultimate tensile value of asphalt component and the ultimate shear value of cement mortar component. The fracture energy be-tween SAC-sealant with SBR and the original pavement is mainly affected by the improvement of the ultimate displacement. The addition of SBR improves the ultimate tensile and shear displacement of asphalt components.%针对SAC型沥青路面冷灌缝材料的特点，建立基于断裂能理论的黏附性能评价方法，考察不同黏附性助剂对灌缝料黏附性能的影响，并探讨其作用机制。研究结果表明：水性丙烯酸树脂类助剂( AR)和丁苯胶乳类助剂( SBR)能够显著提高灌缝料与原路面间的拉伸断裂能和剪切断裂能，且随着助剂用量的增加断裂能增加；AR通过提高灌缝料与原路面间的极限力值对断裂能产生影响，且AR的加入主要提高了沥青组分的极限拉伸力值和水泥砂浆组分的极限剪切力值；SBR通过提高灌缝料与原路面间的极限位移对断裂能产生影响，且SBR的加入主要提高了沥青组分的极限拉伸和剪切位移。