Evaluation of Two Rubber Modified Asphalt Pavements Constructed in Benton County, OR Author(s): Hicks, R.G. and Zhou, Haiping, Transportation Research Institute Origin: Oregon Date: May, 1988 Categories: Performance Key Words: rubber-modified asphalt concrete, modulus, pavement performance Summary: A rubber-modified asphalt mixture using granulated and graded crumb rubber was developed in Sweden in the 1960’s. This product has been used in the United States since the 1970’s. The mixture is intended to provide a surface wearing course with improved properties as compared to conventional asphalt concrete mixtures. These properties include noise reduction, improved fatigue properties, better skid resistance, and a deicing ability. To aid in the evaluation of this product, Benton County and the City of Corvallis, Oregon, undertook demonstration projects to evaluate the use of these mixtures on county roads. This paper documents the evaluation of these two projects. The investigation included both laboratory and field evaluations.