Investigation Study on Pavement Performance of Asphalt Mixtures Modified with Double Adding Admixtures Technology

The idea of utilizing of Zycotherm and glass fiber to enhance the properties and pavement performance of the selected asphalt mixtures. Zycotherm and glass fiber with an additive dosage rate of 0.1% of binder content and 0.5% of aggregate content and increasing the stability and workability of bituminous mix. In order to improve the stability (i.e. bonding between aggregates and pavement) and pavement performance of asphalt mixtures, two varieties of admixtures (Zycotherm agent and glass fiber) were selected and then combined. This is called double-mixture technology. A series of tests about pavement performance of base asphalt mixtures and asphalt mixtures with admixture of Zycotherm or glass fiber were conducted. 0, 0.1%, 0.2%, 0.3% and 0.5% Zycotherm were added into base asphalt mixtures according to quality to evaluate the pavement performance and 0, 0.5%, 1%, 1.5% and 2% were added into base asphalt mixtures. The performance of asphalt mixtures modified with the optimum content of Zycotherm and glass fiber were tested to evaluate the improvement of stability at high temperature and enhance the materials strength and fatigue characteristics of above mixtures. These results show that the stability and strength and pavement performance of asphalt mixtures improve obviously. This supports the beneficial comprehensive effect of the double admixture. The problem of improving the asphalt mixtures performance with a single admixture is solved, in addition to also improving other pavement performance.