Abstract
In the context of increasing traffic demands and emerging mobility trends road infrastructure has to shift towards the fifth generation of roads, which according to Forever Open Road (FOR) vision are envisioned as adaptable to traffic volumes, resilient to changing weather conditions, quickly built, effectively maintained, suitable for retrofitting, self-monitoring, self-repairing and recyclable. Concrete modular pavements can be defined as an example of such type of road infrastructure. Functional needs are mainly associated with implementation area/location, traffic and mobility demands, environmental constraints and etc. This also has a significant impact on the selection of Precast Concrete Pavements (PCP) texture formation method and materials. Concrete pavement surface texture affects both safety and tyre/road noise characteristics. Exposed Aggregate Concrete (EAC) and porous concrete are the most suitable noise reducing solutions for highways and streets wearing layer even in severe traffic and climate conditions. According to the literature analysis, the algorithm of highways and streets low noise concrete design was created. It is recommended to use the highest quality aggregates with maximum size up to 8 mm, gap-graded gradation, higher amount of cement and lower water/cement ratio. The most important characteristics of EAC are Mean Profile Depth (MPD), Mean Texture Depth (MTD) and profile count, while the most important characteristics of porous concrete are compressive strength, outflow and air void content.
Highlights
In the context of increasing traffic demands and emerging mobility trends, road infrastructure has to shift towards the fifth generation of roads, which according to Forever Open Road (FOR) vision are envisioned as adaptable to traffic volumes, resilient to changing weather conditions, quickly built, effectively maintained, suitable for retrofitting, self-monitoring, self-repairing and recyclable
Comprehensive assessment of current and future needs, identification of specific location-based infrastructure performance demands is a first step for successful development of Precast Concrete Pavements (PCP) concepts
At the same time smaller aggregate size of wearing layer concrete provides a smoother and optimised texture, which is important for tyre/road noise generation processes induced by tyre vibrations
Summary
In the context of increasing traffic demands and emerging mobility trends, road infrastructure has to shift towards the fifth generation of roads, which according to Forever Open Road (FOR) vision are envisioned as adaptable to traffic volumes, resilient to changing weather conditions, quickly built, effectively maintained, suitable for retrofitting, self-monitoring, self-repairing and recyclable. This paper describes the novel approach on developing PCP with a “maintenance by design” philosophy, which considers maintenance needs and changing framework conditions already during planning and design phases. It brings more value or the investment costs, taking into consideration the whole lifetime. Different balancing of functional properties might be relevant if PCP application area is streets or main roads (motorways) crossing residential areas In such situations, environmental issues like tyre/ road noise, CO emissions should be tackled by the means of PCP surface texture optimisation. The novelty of this work is created algorithm for PCP concrete design, which ensures good texture parameters providing noise reduction, friction and durability
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