The State of Michigan in the United States of America constructed a trial project that incorporated highway pavement design features from Germany and Austria. The project considered a 25.4 cm unreinforced concrete pavement, over a 15.2 cm lean concrete base, over a 40.6 cm granular frost layer. The concrete pavement...
European Concrete Pavement Trial Project in the USA
Concrete Pavements in Heavy Rain Areas
The difficulty to build roads in heavy rain areas is illustrated through the reconstruction of the road going from Pasto (the capital of the Department of Nariño) to the port town of Tumaco, in the vely South of Colombia at the Pacific Cost and the border with Ecuador. Despite this...
Compressive Stresses in Concrete Pavements and Related Maintenance Problems
The M20 motorway between Junctions 3 and 5 near Maidstone (UK) is an unreinforced pavement with joint spacings of 5m and 6m, comprising warping joints with contraction joints every 30m. The pavement was constructed at the beginning of the 1 970s. A contract for maintenance between Junctions 4 and 5...
A New Technique for Preckracking Materials Treated with Hydraulic Binders
Precracking techniques are used for materials treated with hydraulic binders in order to restrict the effect of shrinkage cracks on the pavement performance. After developing a precracking technique for port platform stwctures in 1984, Via france recently received and developed a new technique for road pavements. This technique applies to...
Technique to Create Wear Resistant Concrete
Through expericnccs during the last years we have gained knowledge about the decisive factors to obtain a wear resistant concrete pavement. The most important factors are: the quality of the aggregate, the strength of the concrete, the adhesiveness between the cement paste and the aggregate particles, the maximum size of...
The Use of Non Destructive Testing and Backcalculation of Moduli in the Rehabilitation Project of the Runway of the Otopeni Airport at Bucarest (Romania)
Results of a rehabilitation project for the runway nr.1 of the Otopeni Airport at Bucarest by using the Falling Weight Deflectometer (FWD). The paper describes how the deflection basin produced by the FWD can be used to characterize the pavement behaviour and to backcalculate the Young modulus (E) of the...
Noise Reducing Concrete Block Pavements
In recent years several investigations were carried out in Germany aimed at reducing the tyre-road noise on concrete block pavements. The results show that these pavements can be constructed with a surface producing the same low traffic noise level as the reference asphalt road surface. In the paper, conclusions are...
Pavement Design and Behaviour Heavily Trafficked Concrete Carriageways in the Seventies
In order to update pavement structure designing methods, the French Technical Network, SETRA (Roads and Highways Engineering Department) and LCPC (Central Public Works Laboratory) have used the LCPC road structure circular test track to study fatigue phenomena relating to several concrete pavement structures and to compare them with the "Californian...
Swedish Experience with and Recommendations for Thin Concrete Overlays on Old Concrete Roads
This paper describes the Swedish experience with thin concrete overlays on old rutted concrete roads. In Sweden, the use of studded tyres leads to wedi and rutting on highways with intensive traffic. In the late seventies, some concrete roads were built in the South of Sweden. A thin concrete overlay...
In Situ Capping Layers Treatment with the Faquir Equipment
The treatment of subgrades with hydraulic binders is designed to increase the bearing capacity of the roadbed significantly. It thus offers a better support to the worksite traffic and the subgrade can be taken into account in the overall structural design of the pavement. The economic stakes are thus evident....
Technological Aspects of Ensuring the Frost and Salt Resistance of Concrete Pavements
The resistance of concrete pavements against frost and salt is ensured by creating the necessary volume of finely-dispersed air voids in the concrete by entraining air during the mixing process with appropriate admixtures. The influence of various structural and technological factors on the stability of entrained air and the formation...
Concrete Airport Areas Results of Recent Achievements
Owing to its anti-kerosene properties, its resistance to heat and punching, concrete is always used in the tarmac of the runway threshold of military airports and in the aprons of large-sized aircrafts in civil airports. Due to the strong competition with flexible structures, concrete is at disadvantage as far as...