沥青净味剂对沥青混合料烟气减排效果室内评价方法

Indoor Evaluation Method of Hot Mix Emission Degradation Effect of Bitumen Perfume

沥青净味剂(Bitumen Perfume,BPF)能有效降低沥青混合料在拌和过程中产生的有害气体的排放量,但目前尚缺乏成熟的减排效果室内评价方法。鉴于此,进行了以下研究:首先,基于室内沥青混合料拌和装置研制了一套沥青混合料在拌和过程中排放气体的采集设备,提出了以降解率为指标的BPF减排效果室内评价方法;其次,对四种热拌沥青混合料在不同BPF掺量下拌和产生的有害气体浓度及降解率进行了评价,并提出了以目标降解率为控制指标的最佳BPF掺量确定方法;最后,对净味SBS改性沥青及其混合料的性能进行了检验。室内试验结果表明,四种有害气体的降解效果均随BPF掺量增加而显著增强;在推荐掺量下,净味SBS改性沥青及其混合料的性能与原值差异不明显且均符合相关规范要求。

Bitumen Perfume(BPF)can effectively degrade the harmful gases produced in the mixing process of asphalt mixture,but there is still a lack of mature indoor evaluation methods for the degradation effect.Given this,the following studies were carried out in this paper.Firstly,based on the asphalt mixing device,a set of gas collection equipment was designed to collect the gas samples produced in the mixing process,and an indoor evaluation method of the BPF degradation effect was proposed based on the degradation rate.Secondly,the harmful gas concentration and degradation rate of four kinds of hot-mixed asphalt mixture under different BPF content were evaluated,and the optimal BPF content determination method with target degradation rate as the control index was proposed.Finally,the properties of SBS-modified asphalt and its mixture were tested under the optimal BPF content.The indoor test results show that the degradation effect of the four gases is obvious gradually with the increase of BPF content.Under the recommended dosage,the per-formance test values of BPF and SBS composite-modified asphalt and its mixture have little difference com-pared with the original values,and all meet the relevant specifications.