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使用硬质沥青铺筑高模量沥青混凝土路面性能优越。硬质沥青的配置方案主要分为两类,天然沥青改性类和化工添加剂改性类。设计了5种硬质改性沥青方案,分别在针入度体系和SHAP体系下,对5种硬质改性沥青方案进行了高、低温性能和流变特性测试。结果表明,岩沥青可显著提高基质沥青高温性能,降低基质沥青感温性,但低温性能损失较大。针入度体系下,不同化工添加剂在改善基质沥青高、低温性能方面表现不一;SHRP体系下,化工添加剂的加入可以提高基质沥青的抗车辙因子,同时会提高低温劲度模量,降低蠕变斜率;BBR试验采用蠕变劲度主曲线评价低温性能更为合理。
The use of hard asphalt paving high modulus asphalt concrete pavement superior performance. The configuration of hard asphalt is mainly divided into two categories, natural asphalt modified class and chemical additives modified class. Five kinds of hard modified asphalt were designed. High hardness, low temperature properties and rheological properties of five kinds of hard modified asphalt were tested under the penetration system and the SHAP system respectively. The results show that rock asphalt can significantly improve the high temperature performance of matrix asphalt, reduce the temperature sensitivity of matrix asphalt, but the loss of low temperature performance is greater. Under the penetration system, different chemical additives have different performances in improving the high and low temperature properties of matrix asphalt. Under the SHRP system, the addition of chemical additives can improve the rutting resistance of matrix asphalt and improve the low temperature stiffness modulus and reduce the creep Variable slope; BBR test using the main curve of creep stiffness evaluation of low temperature performance is more reasonable.