Modified asphalt for heavy-duty pavement, modified asphalt mixture and preparation method of modified asphalt mixture

The invention discloses modified asphalt for a heavy-duty pavement, a modified asphalt mixture and a preparation method of the modified asphalt mixture. The modified asphalt for the heavy-duty pavement is prepared from the following raw material components in parts by weight: 65 to 80 parts of matrix asphalt, 8 to 12 parts of SBS (Styrene Butadiene Styrene), 4 to 8 parts of lake asphalt, 4 to 8 parts of dicyclopentadiene resin, 4 to 8 parts of plant regenerated oil and 0.3 to 0.6 part of an anti-stripping agent. The modified asphalt for the heavy-duty pavement is high in stability and good in adhesion, the preparation method is simple, and a modified asphalt mixture prepared from the modified asphalt has good anti-cracking performance and anti-rutting performance and can meet the requirements of the heavy-duty pavement. 本发明公开了一种重载路面用改性沥青、改性沥青混合料及其制备方法。该重载路面用改性沥青的原料包括以下重量份的组分：基质沥青65～80份、SBS 8～12份、湖沥青4～8份、双环戊二烯树脂4～8份、植物再生油4～8份和抗剥落剂0.3～0.6份。本发明的重载路面用改性沥青稳定性高、粘附性好，并且制备方法简单，用其制备的改性沥青混合料具有良好的抗裂性能和抗车辙性能，可以满足重载路面的需要。