EA-10（C）环氧沥青混合料压实特性研究

Study on Compaction Characteristics of EA-10(C) Epoxy Asphalt Mixture

摘要:

粗级配环氧沥青EA-10（C）作为一种高比例粗集料构成的稳定骨架，其碾压施工工艺参数控制尤其严格。以双柳长江大桥粗级配环氧沥青钢桥面铺装工程为依托，采用旋转压实、马歇尔击实及车辙板轮碾3种试验方法，探究容留温度、容留时间和压实功对粗级配环氧沥青混合料成型效果的影响规律。结果表明：粗级配环氧沥青EA-10（C）最易压实容留温度为170 ℃±5 ℃，最佳容留时间为0.5~1.5 h，压实温度不低于135 ℃可保障混合料压实度，轮碾9~12遍时混合料空隙率约3%，构造深度达0.7 mm左右；通过试验段试铺验证了铺装碾压组合方式，工后检测空隙率1.8%，构造深度0.58 mm且表面零渗水，满足相关指标要求，为同类钢桥面铺装的施工温度与碾压工艺管控提供技术指导和数据支撑。

Abstract:

As a stable skeleton structure composed of a high proportion of coarse aggregate, the control of compaction construction process parameters of the coarse-graded epoxy asphalt EA-10(C) is particularly strict. Relying on the coarse-graded epoxy asphalt steel deck pavement project of the Shuangliu Yangtze River Bridge, three test methods of gyratory compaction, Marshall compaction and wheel rolling with ruts are adopted to explore the effects of containment temperature, containment time and compaction efficacy on the forming quality of coarse-graded epoxy asphalt mixture. The results indicate that the most easily compacted containment temperature of coarse-graded epoxy asphalt EA-10(C) is 170 ℃ ± 5 ℃, and the optimal containment time is 0.5~1.5 h. A compaction temperature is not lower than 135 ℃ able to ensure the compactness of the mixture. After the rolling of wheel roller from 9 to 12 times, the void ratio of the mixture is approximately 3%, and the structural depth reaches about 0.7 mm. The combination method of pavement compaction is verified through the trial paving of the test section. After the construction, the void ratio is found to be 1.8%, the construction depth is 0.58 mm, and there is no water seepage on the surface, which meet the requirements of related indexes, and provide the technical guidance and data support for the control of construction temperature and rolling technology of similar steel deck pavement projects.