白炭黑改性沥青混合料低温抗裂性能研究

The Study of Low Temperature Property of Silica Modified Asphalt Mixture

为了提高沥青混合料的低温抗裂性能,采用白炭黑为改性剂对沥青混合料的低温性能进行了研究．试验结果表明,白炭黑改性沥青混合料的针入度、延度和软化点等物理指标均有所改善,弯曲应变能密度和压缩应变能密度均有所提高,并得出白炭黑能显著改善沥青混合料低温抗裂性能的结论．

In order to enhance the low temperature anti-crack property of asphalt mixture, the paper adopts silica modified material to study the low temperature anti-crack property for asphalt mixture. By indoor tests, it is proved that the physical property of penetration and softening point are improved, and the mechanical property of compressing strain energy and bending strain energy are enhanced. The result shows that silica evidently improves low temperature anti-crack property of asphalt mixture.