Viscous properties and microstructure of recycled eva modified bitumen
Viscous properties and microstructure of recycled eva modified bitumen
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DOI：
10.1016/s0016-2361(03)00217-5
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发表时间：
2004-01-01
期刊：
影响因子：
7.4
通讯作者：
Muñoz, ME
中科院分区：
文献类型：
--
作者：
García-Morales, M;Partal, P;Muñoz, ME
本文研究了交联聚合物改性沥青在较宽温度范围内的粘滞性能。为此目的，在开放式反应器中使用四叶片推进器处理两种不同渗透等级沥青（60/70和150/200）和来自农业薄膜的再循环伊娃共聚物（伊娃（R））。聚合物浓度范围为0至9重量%。对样品进行了5至165摄氏度的粘性流动和DSC测量，以及室温下的光学显微镜检查。从所获得的实验结果中，我们可以得出结论，通过以取决于沥青针入度等级的量添加回收的伊娃共聚物来改善沥青在高温下的粘性。此外，随着聚合物浓度的增加，沥青中往往会发生与富聚合物相的发展相关的显著微观结构变化。微观结构的这些变化对粘结剂的流动行为及其使用性能有显著影响。因此，从环境和经济的角度来看，在PMB中使用回收的伊娃可以被认为是合适的替代品。(C)2004爱思唯尔有限公司保留所有权利。
This paper deals with the viscous properties of recycled-polymer modified bitumens (PMBs) in a wide range of temperatures. With this aim, two different penetration grade bitumens (60/70 and 150/200) and recycled EVA copolymer (EVA(R)) from agriculture films were processed in an open reactor using a four blade propeller. Polymer concentration ranged from 0 to 9 wt%. Viscous flow and DSC measurements, from 5 to 165 degreesC, and optical microscopy, at room temperature, were performed on the samples. From the experimental results obtained, we may conclude that the viscous properties of bitumen, at high temperature, are improved by adding recycled EVA copolymer in amounts that depend on bitumen penetration grade. Moreover, significant microstructural changes, related to the development of a polymer-rich phase, tend to occur in the bitumen as polymer concentration increased. These changes in microstructure have a significant influence on the flow behaviour of the binder and on its in-service performance. As a consequence, the use of recycled EVA in PMBs can be considered a suitable alternative from both environmental and economical points of view. (C) 2004 Elsevier Ltd. All rights reserved.