钢桥面环氧沥青铺装用冷拌浇注式混合料修复应用研究

Application Rearch of Cold-mixing Gussasphalt Mixture in Repairing Epoxy Asphalt for Steel Bridge Deck Pavement

为解决钢桥面环氧沥青铺装快速修补问题,结合浇注式沥青混合料修补特点,开发了冷拌浇注式混合料的修补材料。通过室内试验,研究了冷拌浇注式混合料中环氧胶结料的力学特性、耐候性和凝结时间,同时对冷拌浇注式混合料的路用性能、施工可行性进行了研究和评价,试验结果表明:1)环氧胶结料不仅具有良好的力学性能,还具有良好的耐酸、耐紫外老化性能,其微凝胶体形成时间在3 h左右;2)冷拌浇注式混合料的马歇尔稳定度、流值和低温弯拉强度等路用性能均符合规范要求,且具备良好的施工可行性;3)该混合料用于实桥项目的养护工程中取得了良好的效果。

In order to solve the problem of quick repair of epoxy asphalt pavement on steel bridge deck,the cold-mixing gussasphalt mixture was developed in combination with the repairing characteristics of gussasphalt.Through laboratory tests,the mechanical properties,weatherability and setting time of epoxy cementities of cold-mixing gussasphalt mixture were studied.At the same time,the pavement performance and construction feasibility of the cold-mixing gussaphalt mixture was studied and evaluated.The experimental results show that the epoxy cementing material not only has good mechanical properties,but also has good acid resistance and ultraviolet aging resistance,and the formation time of its microgel is about 3h.In addition,the road performance of the cold-mixing gussasphalt mixture meets the requirements of the code,such as Marshall stability,flow value and low temperature bending and tensile strength.It has good construction feasibility.And the material was used in the entity maintenance engineering on bridge deck with effect.