Estimation of RAP's binder viscosity using GPC without binder recovery
Estimation of RAP's binder viscosity using GPC without binder recovery
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DOI：
10.1061/(asce)0899-1561(2006)18:4(561
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发表时间：
2006-08
影响因子：
3.2
通讯作者：
Kwang W. Kim;Kyong-Jin Kim;Y. Doh;S. Amirkhanian
中科院分区：
文献类型：
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作者：
Kwang W. Kim;Kyong-Jin Kim;Y. Doh;S. Amirkhanian
再生沥青路面（RAP）中的粘合剂粘度通常由回收的粘合剂测量。为了从RAP中回收老化的粘合剂，必须有一系列的实验室过程，至少需要一两天。本研究的目的是通过凝胶渗透色谱（GPC）技术，确定在短时间内（2 h）估计老化粘结剂（RAP）的绝对粘度的可能性。许多研究表明，GPC曲线与粘结剂的物理性能有很好的相关性。为了应用这一概念，GPC测试在来自RAP混合物的样品上运行而没有回收。统计分析表明，绝对粘度的沥青混合料中的粘合剂可以合理地估计从GPC测试。大分子尺寸的绝对粘度的R2值高达0.95的未改性沥青和0.9的聚合物改性沥青结合料。
The binder viscosity in a reclaimed asphalt pavement (RAP) is usually measured from the recovered binder. To recover the aged binder from RAP, there must be a series of laboratory process which takes at least a day or two. This study was initiated to determine the possibility of estimating absolute viscosity of aged binder (in RAP) within a short time (2 h) by using gel-permeation chromatograph (GPC) technique. Many studies have shown that the GPC profile has a good correlation with physical properties of binder. To apply this concept, GPC tests were run on the samples from RAP mixtures without recovery. Statistical analysis indicated that absolute viscosity of the binder in an asphalt mixture could be reasonably estimated from the GPC test. The R2 value of the absolute viscosity with large molecular size was as high as 0.95 for unmodified asphalt and 0.9 for polymer-modified asphalt binder.