Abstract
The continuous use of load-bearing road surfaces often results in degradation over time, particularly if they are constructed from cement or aggregates that were poorly polished. Surfaces prepared from calcined bauxite exhibit good skid resistance properties, and this work describes a comparison of the wear resistance of six different kinds of calcined bauxite with the aim of identifying the best material for road construction. Our results suggest that wear resistance of calcined bauxite is not only related to its hardness, but also dependent on the hardness dispersion throughout the aggregate and its elastic modulus. These data provide important information to enable the correct grade of bauxite clinker to be chosen for constructing high-friction road surfaces with good wear and skid resistance properties.
Highlights
IntroductionThe anti-skid performance of asphalt pavements, especially cement surfaces, can degrade quickly over their service periods, resulting in a decline in both their road service capacity and their safety
The anti-skid performance of asphalt pavements, especially cement surfaces, can degrade quickly over their service periods, resulting in a decline in both their road service capacity and their safety.cementitious aggregates were shown to display comparable aggregate properties [1], these artificial aggregates still produce inferior wear resistance to calcined bauxite results when used for road construction [2]
Cementitious aggregates were shown to display comparable aggregate properties [1], these artificial aggregates still produce inferior wear resistance to calcined bauxite results when used for road construction [2]
Summary
The anti-skid performance of asphalt pavements, especially cement surfaces, can degrade quickly over their service periods, resulting in a decline in both their road service capacity and their safety. Cementitious aggregates were shown to display comparable aggregate properties [1], these artificial aggregates still produce inferior wear resistance to calcined bauxite results when used for road construction [2]. Calcined bauxite is an aggregate that provides a high level of skid resistance to road surfaces over a long period of time [3]. Bauxite clinker is one of the main raw materials used to produce traditional refractory materials. It is formed by crushing, sieving, and calcination in a kiln, followed by pulverization into particles with different sizes used in road pavement [4].
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