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

本试验项目将解决沥青路面在反复交通荷载作用下产生的轮迹车辙问题。将开发一种新的扭转空心圆柱体装置，以比迄今更准确地再现实验室中的现场加载状态，以便能够高质量地测量在循环加载下积累的永久应变。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、但精度较低的沥青剪切测试设备，使用相同的材料。将在诺丁汉路面测试设施进行试点规模的车轮跟踪测试，以生成车辙性能数据，并将使用加州团队的完整测试数据。该项目的成果旨在改进沥青路面车辙发展的预测方法，并评估用于工业评估沥青抗车辙性能的简单实用试验的可靠性。

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.