Effect of aggregate gradation changes in asphalt mix performance

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University of New Brunswick


The New Brunswick Department of Transportation and Infrastructure follows specifications in their Standard Specifications for Highway Construction for their road construction. Nevertheless, these specifications are 20-plus years old and there is a need to update them. This research project aims to give an insight into possible changes that these specifications could include in its updating process. To achieve this, research was conducted in a two-year master’s degree program at the University of New Brunswick. The experimental work consisted of the analysis of current guidelines, the evaluation of performance tests for common distresses from four approved mix designs, and the modification of these mix designs using conventional and unconventional tools. The outcomes of this project will be helpful to the province of New Brunswick and other Transportation Agencies, that are transitioning and updating their specifications aiming for higher-quality roads with higher resistance to common distresses such as rutting and cracking.