高性能热拌超薄罩面制备技术及其在G3京台高速上的应用

Preparation of High Performance Hot-Mix Ultra-Thin Overlay Pavement and Its Application in G3 Jingtai Expressway

随着我国交通飞速发展,公路运营已经突破500万公里,其中养护里程接近99%。本文对比高黏高弹改性沥青和高黏改性沥青制备的超薄罩面技术,结果表明:两种改性沥青制备的超薄罩面混合料性能均满足超薄罩面技术指标要求,且添加剂A的加入能够提升超薄罩面的高温性能,但会影响低温性能。通过G3京台高速超薄罩面工程可以看出,高黏高弹超薄罩面具有优异的抗滑性能和降噪音功能,可广泛用于沥青路面抗滑性能提升工程。

With the rapid advancement of transportation industry, highway mileage has exceeded 5 million kilometers. The proportion of maintenance mileage is close to 99%. In this paper, two kinds of ultra-thin overlay pavement prepared by high viscosity and elasticity modified asphalt and high viscosity modified asphalt were compared. Results show that properties of the ultra-thin overlay pavement prepared by those two modified as-phalts can meet the technical requirements of ultra-thin overlay. High temperature performances of ultra-thin overlay paving can be improved with the addition of additive A, while low temperature performances are weakened. It can be seen from the application in G3 Jingtai Expressway that ultra-thin overlay pavement with high viscosity and elasticity modified asphalt exhibits excellent an-ti-skid resistance and noise reduction, which can be widely used in asphalt pavement while an-ti-skid performance is needed.