非均匀沥青混合料不同影响因素下劈裂性能研究

Study on Splitting Performance of Non-uniform Asphalt Mixtures Under Different Influencing Factors

为研究不同影响因素下非均匀沥青混合料的力学特性,在不同加载速率和试验温度条件下,开展不同离析程度沥青混合料的劈裂试验。结果表明:同一级配类型沥青混合料发生不同程度离析后,混合料内部沥青胶浆含量越多,劈裂强度受温度和加载速率变化影响越显著;开级配沥青混合料发生集料离析后,内部细集料越多,结构沥青越多,则劈裂强度越高。AC-13沥青混合料在各离析程度下比OGFC-16沥青混合料表现出更优的劈裂性能。

To study the mechanical properties of non-uniform asphalt mixtures under different influencing factors,the splitting test of asphalt mixtures with different degrees of segregation was carried out under different loading rates and test temperatures.Finding the more asphalt mortar content in the internal asphalt mixtures with different segregation degrees of the same grading,the splitting strength is affected by the change of temperature and loading rate is more significant.After aggregate segregation occurs,the more internal fine aggregates,the more structural asphalt,the higher the splitting strength.AC-13 shows better splitting performance than OGFC-16 under each degree of segregation.