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天然沥青的分子量大 ,氮含量高 ,性质稳定 ,用天然沥青改性后的道路沥青具有良好的高温稳定性及低温抗裂性能 ,抗车辙能力大大加强 ,且具有很强的抗剥落性能。我国天然沥青资源丰富 ,开发的WL系列添加剂和国外产品相当或略好。
The natural asphalt has high molecular weight, high nitrogen content and stable properties. The road asphalt modified with natural asphalt has good high temperature stability and low temperature crack resistance, greatly improves rutting resistance and has strong anti-spalling property. China’s natural asphalt rich in resources, development of the WL series of additives and foreign products quite or slightly better.