Study of Hot Mix Asphalt Containing Industrial Coal Waste in Road Pavement Based on Vietnamese Specification

The application of waste products from industrial parks into construction is one of the study and application trends concerned by many researchers and engineers. Coal ash from industrial parks is and is going to cause problems in the environment as well as high prices in treatment. Most of the studies focus on cement concrete using coal ash as fly ash or bottom ash. Some studies applied industrial coal waste in asphalt concrete, but the evaluated test is simple tests such as Marshall stability, flow, and indirect tensile strength. As a result, the paper focuses on using coal ash from furnace products in industrial parks for a dense-graded asphalt concrete based on laboratory tests, including indirect tensile fatigue, surface friction, and wheel tracking test. The sand patch method also is used to evaluate the macro-texture depth of asphalt concrete surfaces using coal ash incorporated fine mineral aggregate, which is a very important property for road safety driving.