Development of a Hollow Cylinder Apparatus to investigate the shearing characteristics of asphalt

这个实验项目将解决在重复交通荷载下沥青路面上产生的车辙问题。将开发一种新的扭转空心圆柱装置，以比迄今为止更准确地再现实验室中的现场加载状态，从而可以对循环加载下的永久应变进行高质量的测量。与加州大学伯克利分校和戴维斯分校的合作将允许使用他们建立的，但不太准确的沥青剪切试验设备，使用相同的材料。将在诺丁汉路面试验设施中进行中试规模的车轮跟踪试验，以生成车辙性能数据，并将使用来自加利福尼亚团队的全尺寸试验数据。该项目的成果旨在改进沥青路面车辙发展的预测方法，并评估工业界用于估计沥青抗车辙能力的简单实用测试的可靠性。

This experimental project will address the problem of wheel track rutting that develops in asphalt road pavements under repeated traffic loading. A new torsional Hollow Cylinder Apparatus will be developed to reproduce, more accurately than hitherto, the field loading regime in the laboratory, so that high quality measurements can be made of the permanent strain that accumates under cyclic loading. Collaboration with the University of California at Berkeley and at Davis will allow use to be made of their established but less accurate asphalt shear testing equipment using identical material. Pilot scale wheel tracking tests will be conducted in the Nottingham Pavement Test Facility to generate rutting performance data and use will be made of full scale test data from the Californian team. The outcome of the project is aimed at improving prediction methods for rut development in asphalt pavements and to assess the reliabilty of a simple practical test for use by industry to estimate the rut resistance of asphalts.