Between 1982 aiid 1989, 8 thin overlay test sections were constructed with a total surface area of 129.000 m2 . The relevant research project is carried out with a view to the necessary future renovation of part of the Belgium road network. All sections were built with 10 to 12...
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...
Cement Concrete Structures in the Design of Urban Roadways
Urban roadways represent considerable stakes from both the quantitative and qualitative standpoints, with the almost permanent concern today for integration with respect to the site and to users of public spaces. A non-exhaustive review of the trends in practices and tools available to designers, builders and managers of urban roadways...
Time Dependent Behaviour of Roller Compacted Concrete Pavements in Port Yards
This paper describes the investigation of the time dependent behaviour of roller compacted concrete pavements (RCCP) in port yards resulting from drying shrinkage and thermal stresses, and sedsuridi effects on the joint width. Test results show that even with a joint spacing of 8 m, approximately 1 N/mm2 of thermal...
Freeze-Thaw Damage to Concrete Pavements
Requirements for concretes in colder environments are stricter than those normally requested for standard commercial concretes. Therefore, a concrete produced with (i) high quality ingredients, (ii) a water/cement ratio of 0.35 to 0.40 by mass, (iii) 3.0 to 6.0 percent entrained air, (iv) an adequate maturity, i.e. when the compressive...
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...
Experiences with Noise Reducing Surfaces for Existing Concrete Pavements
In Carinthia a surface dressing with epoxy resin as binder and chippings 3/4 mm has been used since 1989. The task was to get better noise reducing conditions of existing concrete pavements. The result can be seen in noise reducing properties of - 6 db(A) compared with the existing old...
The Austrian Specifications for Concrete Pavements
The latest version of the Austrian specifications for concrete pavements include paving between fixed forms and slipforrn paving, super plasticized concrete, recycled concrete and noise reducing concrete surfaces. This paper describes exposed aggregate surfaces, the requirements for concrete pavements and the materials used to make them.
The Phenomenon of the Serviceability of Concrete Motorways after 55 to 60 Years under Traffic
At present there are still many hundreds of kilometres of concrete motorways in the former East Germany which were constructed in the thirties. The phenomenon is not the fact that now, especially after the last winter, a lot of them have reached a critical condition, but that until today all...
A CRCP Inlay for the Rehabilitation of a Deteriorated Concrete Pavement on a Motorway with Very Heavy Traffic
Short description of the rehabilitation works on the most heavily trafficked motorway in Belgium.
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....
Cycling on Peat
A cycle track had to be laid quickly on a poor load-bearing subsoil, 18 m of peat. The usual design would have caused excessive subsidence and damage to the adjacent road. The chosen solution was a "floating" structure. In the design the upward pressure of the groundwater was considered to...