Pavement type selection is often one of the more challenging and controversial decisions highway administrators face. The process involves weighing engineering factors such as materials, structural, and even long term performance against initial and life-cycle costs to help agencies decide between various pavement alternatives. Given the expenditure of significant public...
Photocatalytic Air Purifying Pavements in Belgium Where are We
The construction and rehabilitation of roads are more and more linked to the environmental impact of this road. Durability, noise and air quality become more and more important as design criteria. The choice of materials can influence the environmental impact of traffic and road infrastructure. In this respect, photocatalytic concrete...
Influence of Recycled Concrete Aggregates on Strength Properties of Concrete
The demand to use recycled aggregates in concrete is getting more important. However, to obtain a sustainable road, it is necessary to construct durable pavements and therefore to use concrete of good and reliable quality. The use of recycled aggregates will give environmental advantages but could lead to excessive shrinkage...
Restrained Shrinkage Cracking of Continuously Reinforced Self-Consolidating Concrete Roads
Continuously Reinforced Concrete Pavements (CRCP) are designed in such a way that the longitudinal reinforcement limits the widths of the transverse cracks in the pavement in order to prevent the water, chemicals and deicing salts from penetrating into the pavement. Self-Consolidating Concrete (SCC) is a new and innovative concrete type,...
Building Concrete Roundabouts in Switzerland
Since 2003, roundabouts in Switzerland have been built with concrete carriageways. Because space is at a premium due to the population density, the diameter of most roundabouts is less than 30 m. Roundabout carriageways with small diameters are subject to particularly high shear stress levels, which is why the choice...
Impacts of the Longitudinal Joint Location on Slab Stresses
Longitudinal joints in concrete pavements historically have been located along the edges of lane lines, a condition that results in applied loads being located at the most critical points (e.g., edges and corners of slabs). With increasing use of light?colored silicone sealants that contrast less with the concrete surface color,...
The Use of Fast-Setting Concretes for Airport Repairs
A frequently noted disadvantage of cement concrete pavements is repair time. For further application of this technology, it was necessary to eliminate this disadvantage and significantly reduce repair time. Therefore, Skanska developed the "Fast-setting concrete technology". In-house development commenced in 2005. MC Bauchemie, design engineers and investor representatives also participated....
Data Analysis and Simulation of Rigid Pavement Test Item at the National Airport Pavement Test Facility
The Federal Aviation Administrations (FAA) National Airport Pavement Test Facility (NAPTF) conducts accelerated full-scale testing of airport pavements under controlled conditions. Construction Cycle 6 (CC6) was aimed at evaluating the effects of concrete strength and subbase materials. Two types of isolation joints were also tested for comparison. Data from embedded...
Ultrasonic Tomography as Non Destructive Measuring Technique for Concrete Pavement Evaluation
Ultrasonic tomography is a non-destructive method to evaluate different characteristics of the pavement such as thickness, position of reinforcement, presence of cracks and impurities, strength evolution. This technique can be used for control and follow-up of new pavements but also for non-destructive analysis of existing pavements in order to determine...
Urban Concrete Pavements History and Current Technology
This paper aims to outline briefly the history of the first concrete pavements in Europe and in the United States. The authors will present examples of concrete pavements built in Tarnów, a relatively large city (115,000 inhabitants) in southern Poland. They will show technological and structural solutions for using concrete...
Thinking Outside the Box with Roller Compacted Concrete Pavement
Roller compacted concrete (RCC) pavement has been used for decades in situations where repetitive heavy loads are applied and for large paved areas. These applications have included logging yards, ports, automobile manufacturing plants, and warehouse districts among other places. While these are appropriate applications for RCC pavement, there are many...
Skid Resistance Properties of Concrete Pavement Surfaces in Tunnels
Skid resistance properties of concrete pavement surfaces in tunnels are measured with the dynamic measuring device TRT on a regular basis in the Czech Republic. Measurements are usually carried out before and after putting the tunnel into operation and then approximately once a year; the skid resistance is also measured...