地沟油冷再生沥青混合料路用性能研究

Study on pavement performance of cold recycled asphalt mixture by gutter oil

将地沟油作为老化沥青再生剂,通过再生沥青三大指标及再生沥青混合料劈裂强度、浸水马歇尔稳定度和四点弯曲疲劳寿命等测试,研究了地沟油对老化沥青再生性能及冷再生混合料路用性能的影响。结果表明:地沟油掺量在15%时再生沥青的性能基本达到70^(#)基质沥青要求;铣刨料掺量相同时,随地沟油掺量增加,冷再生混合料力学性能、低温性能、水稳定性逐渐提高,高温稳定性能降低,疲劳寿命呈先延长后缩短的趋势;地沟油掺量相同时,随铣刨料掺量增加,混合料的力学性能、低温性能、水稳定性降低,高温稳定性能提高,疲劳寿命缩短。

Gutter oil is used as a regenerant for aged asphalt,the regeneration performance of aged asphalt and pavement performance of cold recycled asphalt mixture were studied by three indexes of recycled asphalt,splitting strength,immersion marshall and four-point bending fatigue test of recycled asphalt mixture.The results show that the performance index of reclaimed asphalt was basically restored to the performance requirement of 70^(#)matrix asphalt,when the waste oil content is 15%.At the same asphalt milling material,as the amount of gutter oil increased,the properties of cold recycled asphalt mixture with different asphalt milling material content had the same change trend,mechanical properties,low temperature properties and water stability properties were gradually improved,the high temperature stability decreased,fatigue life first decreased and then increased.Under the same amount of gutter oil,with the increase of asphalt milling material,the mechanical properties,low temperature properties and water stability were decreased,high temperature stability increased,fatigue life became shortened.