Performance assessment of composite modified bitumen integrated with desulfurized crumb rubber and SBS modifier as waterproofing adhesive layer

IF 3.2 3区 材料科学 Q2 ENGINEERING, CHEMICAL International Journal of Adhesion and Adhesives Pub Date : 2024-07-25 DOI:10.1016/j.ijadhadh.2024.103802
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Abstract

Performance of the waterproofing adhesive layer played a critical role for governing duration of bridge deck paving system due to harsh service conditions. To develop a new type of modified bitumen suitable for the layer between bridge deck and overlaid asphalt, this study investigated the performance of composite modified bitumen (CMB) integrated with desulfurized crumb rubber (DCR) and SBS modifier. The influence of DCR and SBS additive on rheological behavior, high-temperature performance, low-temperature cracking resistance, and adhesive performance of CMB was investigated by adopting various experimental tests, which including penetration, ductility, softening point, Brookfield viscosity, dynamic shear rheometer (DSR), bending beam rheometer (BBR), and bonding strength. The high-temperature stiffness and low-temperature flexibility of CMB was improved after composite modification, which in turn contributed to the shear and cracking resistance. The black diagram indicated that the formation of polymer network in the CMB improved the viscous flow resistance and maintained elastic response at high in-service temperature. The bonding strength and moisture stability of the composite bitumen-concrete interface were enhanced, with the properties exceeded the commercial SBS modified bitumen. The CMB binders R18S2 and R18S3 presented good performance and can be used for waterproofing adhesive layer as a substitute of the commercial SBS modified bitumen.

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以脱硫橡胶屑和 SBS 改性剂为防水粘合剂层的复合改性沥青性能评估
由于使用条件苛刻,防水粘合层的性能对桥面铺装系统的使用寿命起着至关重要的作用。为了开发一种适用于桥面铺装和沥青面层之间的新型改性沥青,本研究对添加了脱硫橡胶(DCR)和 SBS 改性剂的复合改性沥青(CMB)的性能进行了研究。通过各种实验测试,包括渗透性、延展性、软化点、布鲁克菲尔德粘度、动态剪切流变仪(DSR)、弯曲梁流变仪(BBR)和粘结强度,研究了脱硫橡胶和 SBS 添加剂对 CMB 的流变行为、高温性能、低温抗裂性和粘结性能的影响。复合材料改性后,CMB 的高温刚度和低温柔度得到改善,从而提高了抗剪切和抗开裂性能。黑色图表显示,CMB 中聚合物网络的形成改善了粘流阻力,并保持了在高使用温度下的弹性响应。复合沥青-混凝土界面的粘结强度和湿稳定性得到了提高,其性能超过了商用 SBS 改性沥青。CMB 粘结剂 R18S2 和 R18S3 具有良好的性能,可替代 SBS 改性沥青用于防水粘结层。
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来源期刊
International Journal of Adhesion and Adhesives
International Journal of Adhesion and Adhesives 工程技术-材料科学:综合
CiteScore
6.90
自引率
8.80%
发文量
200
审稿时长
8.3 months
期刊介绍: The International Journal of Adhesion and Adhesives draws together the many aspects of the science and technology of adhesive materials, from fundamental research and development work to industrial applications. Subject areas covered include: interfacial interactions, surface chemistry, methods of testing, accumulation of test data on physical and mechanical properties, environmental effects, new adhesive materials, sealants, design of bonded joints, and manufacturing technology.
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