回收碳粉改性沥青制备及其技术性能

Preparation and Technical Performance of Recycle Carbon Powder Modified Asphalt

摘要: 打复印机回收碳粉的积累已经成为一个潜在的环境风险，必须回收利用。采用回收碳粉作为沥青改性剂，按不同掺量制备改性沥青。通过对同掺量下不同温度、剪切速率、剪切时间的改性沥青进行针入度、软化点、延度等室内试验，得出最佳室内制备工艺参数。试验结果表明：1) 回收碳粉改性沥青室内最佳工艺参数为剪切温度150℃~160℃，剪切时间30 min，剪切速率3500~4500 r/min；2) 回收碳粉能改善基质沥青的高温性能，增强抵抗变形的能力，并降低感温性，但低温性能有小幅度降低；3) 为保证在提高沥青高温性能的同时而减小对低温性能的影响，建议回收碳粉添加量不应超过10%。

Abstract: Accumulation of waste powder of printer has become a potential environmental risk; it must be recycled. In carbon powder as an asphalt modifier, different doses of content preparing modified asphalt are used. The influence of different processing technique parameters and different modifier sorts on modified asphalt’s properties is studied, thus to direct modified asphalt production. Theoretical research combined experimental methods is carried out. The result shows that: 1) carbon powder modified asphalt’s best cutting temperature is from 150˚C to 160˚C, cutting time is 30 minutes, and cutting rate is 3500 - 4500 r/min; 2) recycled carbon powder can improve the high temperature performance of asphalt, thus enhance the ability of resistance to deformation, and reduce the temperature sensitivity, but the low temperature performance of asphalt has fallen slightly; 3) as the guarantee to improve the high temperature performance of asphalt and at the same time reduce the effect on the properties of low temperature, the recycled carbon powder added amount shall not exceed 10%.