不同 USP 掺量温拌沥青混合料性能对比研究

Comparative Study on Properties of Warm-mix Asphalt Mixture with Different USP Dosages

摘要:

为响应国家提倡的低碳、节能环保的施工生产方式，通过在70#基质沥青中加入USP低温添加剂降低沥青混合料生产与施工过程中的温度，同时对比传统热拌沥青混合料、USP低温沥青混合料和USP低温改性沥青混合料的路用性能。采用掺量为3%和4.5%的USP低温沥青混合料进行对比试验，结果表明，加入USP低温添加剂的沥青混合料比传统热拌沥青混合料温度降低40℃，随着USP掺量增加，未经过改性与经过改性的USP低温沥青混合料的冻融劈裂强度比均呈下降趋势，而经过改性的USP低温改性沥青混合料能够在温度降低40℃的基础上保证良好的水稳定性和高温性能。

Abstract:

In response to the low carbon, energy saving and environmental protection construction and production mode advocated by the state, USP low temperature additive is added to 70# matrix asphalt to reduce the temperature of asphalt mixture production and construction process. Meanwhile, the pavement performances of traditional hot-mix asphalt mixture, USP low temperature asphalt mixture and USP low temperature modified asphalt mixture are compared. The comparison test is carried out with the dosage 3% and 4.5% USP low-temperature asphalt mixture. The results show that the temperature of the asphalt mixture with USP low-temperature additive is 40℃ lower than that of the traditional hot-mix asphalt mixture. With the increase of USP content, the ratio of freezing-thawing splitting strength of the unmodified and modified USP low-temperature asphalt mixture all shows a decreasing trend. And the modified USP low-temperature modified asphalt mixture can ensure good water stability and high temperature performance on the basis of reducing the temperature by 40℃.