结果表明，高等级道路沥青老化属于一级动力学反应。
The result shows that the aging of high grade paving asphalt is a first order reaction.
研究表明，传统路面设计技术仅仅适用于低等级道路路面的设计；
The research indicates that the conventional pavement technique can only be suitable for the normal pavement design but not for the heavy-duty pavements.
SBR改性沥青具有优良的低温性能，广泛应用于高等级道路的铺筑中。
The SBR modified asphalt which has good low temperature property is widely used for high grade road paving.
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