提高沥青混合料抗水损害新技术

TECHNICAL WAY FOR IMPROVING ANTI-WATER ABILITY OF ASPHALT MIXTURE

由于动水压力是目前高速公路沥青路面引发水损害的主要原因 ,因此对沥青与集料界面的粘结作用提出更高的要求。强化冻融劈裂试验表明 ,开发研制的含铬外加剂能够显著提高酸性集料沥青混合料长期抗水损害能力。大量研究表明 ,配位键理论对认识沥青集料界面粘结机理具有重要意义 ,在沥青集料界面上增加难溶于水的离子键和配位键化合物 ,能够较好地解决混合料的水敏感性问题 。

At present, dynamic water pressure is the main factor resulting in water damage for the asphalt pavement of the high way, so the adhesion function of asphalt and aggregate should be very strict. A kind of chromium additive was developed. The improved freeze thaw experiment indicates that this additive can improve the long term anti water ability of acid aggregate asphalt mixture markedly. Many researches indicate that the coordinate bond theory is very important for studying the adhesiveness mechanism of asphalt aggregate interface. The introduction of transition metal cation to the interface of asphalt and aggregate is favorable for enhancing the long term anti water ability of the mixture.