温拌再生沥青路面水损坏研究

Research on Water Damage of Warm Mix Recycled Asphalt Pavement

再生温拌沥青混合料具有WMA技术和RAP的优点,但是,在服役温度下,再生温拌沥青混合料中的水损坏是研究者关注的焦点,目前尚未对其进行全面深入的研究。因此,为了研究所有服役温度下,水分对再生温拌沥青混合料的性能的影响,在室内采用弹性模量试验、间接拉伸疲劳破坏试验(IDT)、半圆形弯曲(SCB)试验等方法对混合料进行了研究。结果表明,尽管含有RAP的WMA混合料具有亲水性以及对水分敏感性的集料和老化的结合料,但表现出良好的抗水损坏能力。因此,再生温拌沥青混合料可推荐用于易发水损坏环境和自然资源有局限性的区域。

Regenerated warm mix asphalt mixture has the advantages of WMA technology and RAP.However,water damage in recycled warm mix asphalt mixture at service temperature is the focus of researchers'attention,and comprehensive and in-depth research has not yet been conducted.Therefore,in order to study the effect of moisture on the performance of recycled warm mix asphalt mixture at all service temperatures,methods such as elastic modulus test,indirect tensile fatigue failure test(IDT),and semi circular bending(SCB)test were used indoors to study the mixture.The results indicate that although the WMA mixture containing RAP has hydrophilicity and sensitivity to moisture in aggregates and aged binders,it exhibits good resistance to water damage.Therefore,recycled warm mix asphalt mixtures can be recommended for use in areas prone to water damage and limited natural resources.