Performance evaluation of bitumen modified with pyrolysis carbon black made from waste tyres
Performance evaluation of bitumen modified with pyrolysis carbon black made from waste tyres
复制标题
废旧轮胎热解炭黑改性沥青的性能评价
DOI：
10.1016/j.conbuildmat.2016.02.143
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发表时间：
2016-05-15
影响因子：
7.4
通讯作者：
Guo, Qi-long
中科院分区：
文献类型：
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作者：
Feng, Zhen-gang;Rao, Wen-yu;Guo, Qi-long
以废轮胎为原料，选用两种热解炭黑(PCB)对道路沥青(SK70#和SK90#)进行熔融共混改性。研究了多氯联苯对沥青的物理性质、储存稳定性、流变性和性能分级的影响。采用薄膜烘箱试验(TFOT)、加压老化试验(PAV)和自然老化试验(NA)对多氯联苯改性沥青的热氧老化性能进行了评价。试验结果表明，两种多氯联苯均显著提高了沥青的高温性能，提高了沥青的抗高温永久变形能力。多氯联苯显著改善了沥青的热氧老化和光氧化老化。颗粒尺寸较大的造粒热解炭黑对沥青性能的影响比粒径较小的普通热解炭黑对沥青性能的影响更大。适当掺量的多氯联苯改性沥青可用于道路施工，对改善路面使用性能和回收利用废旧轮胎具有重要意义。(C)2016爱思唯尔有限公司。保留所有权利。
Two types of pyrolysis carbon blacks (PCBs) made from waste tyres were selected to modify road bitumens (SK70# and SK90#) via melt blending. The effects of the PCBs on physical properties, storage stability, rheological characteristics and performance grading (PG) of the bitumens were investigated. The thermal- and photo-oxidative aging of the PCB modified bitumens were evaluated by thin film oven test (TFOT), pressurized aging vessel (PAV) and natural aging (NA). Experimental results show that the high-temperature properties of the bitumen were obviously enhanced by both PCBs, leading to an improved resistance of bitumen to permanent deformation at high temperatures. The thermal- and photo-oxidative aging of bitumen were improved significantly by the PCBs. The pelleting pyrolysis carbon black (PCB-2) with bigger particle displayed more significant influence on bitumen performance than the normal pyrolysis carbon black (PCB-1) with relatively smaller grain size. The modified bitumen with appropriate dosage of PCBs can be used for road construction, which is of great significance for the improvement of pavement performance and recycling of waste tyres. (C) 2016 Elsevier Ltd. All rights reserved.