几种废木生物油改性沥青混合料力学性能比较研究

Comparison Research of Mechanical Performance of Several Kinds of Bio-asphalt Modified Asphalt Mixtures

旨在评估3种废木生物油(原样生物油、脱水生物油和聚合物改性生物油)以不同比例(比例分别为5%和10%)添加入传统沥青中对沥青混合料性能的影响。分别采用沥青路面分析仪(APA)试验、四点弯曲梁疲劳试验和间接拉伸(IDT)强度试验评估沥青混合料的抗车辙、抗疲劳和拉伸强度。试验结果表明,添加生物油可显著提高沥青混合料的疲劳性能,而对车辙性能并没有显著的影响,此外对拉伸强度略有影响。同时,聚合物改性生物油与其他两种改性沥青混合料相比具有更优的性能。室内试验结果的统计分析结果与上述结论一致。研究结果表明,废木生物油可以用为路面石油沥青胶结料的一种改性剂。

This study aims to evaluate the effect of bio-oils on asphalt mixture performance after blending bio-oil （5% and 10% by weight, respectively） into the traditional asphalt binder. Three types of bio-oils are used-the original biooil, dewatered bio-oil and polymer-modified bio- oil. The asphalt pavement analyzer （APA） test, four-point beam fatigue test and indirect tensile （IDT） strength test wereconducted to evaluate the rutting resistance, fatigue performance and tensile strength,test results showed that the addition of bio-oils significantly improves the asphalt mixture ance ,has no significant effect on the rutting performance , but slightly impacted the tensile strength. In addition , polymer in the bio-oil was observed to improve the asphalt mixture performance as the PMB modified asphalt mixtures performed better than the two other mixtures. Further , statistical analysis on the laboratory test results are conducted and found to be consistent with the findings above. The studyshows that the bio-oils derived from waste wood resources can be a good extender um asphalt binders in the pavement industry.