Resources

Washed or fine brushed concrete was introduced in the Netherlands, replacing rough brushed concrete, to reduce the road noice. In many cases the minimum friction coefficient required was not reached. However, measurements carried out some months later showed an improvement of the results. To investigate if this improvement of the...

The turnkey construction method can be very beneficial to an employer both during the bidding process and during construction. A turnkey road construction project was selected for the first time in Germany as the construction method for the A15 motorway between Cottbus-West and Forst. In order to alleviate backups within...

Road concrete in the thirties did not have a particularly high strength, but it grew over the years. Strength tests on cores, taken last year, show that the strength -compressive as well as the more important splitting tensile- of the old section and also of almost all new ones is...

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...

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...

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...

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...

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...

Most of the Belgian Motorways, with a concrete pavement, have a deeply grooved concrete surface. Although those wearing courses have a very good skid resistance, there is a great concern about the noise pollution. Not only noise barriers and the porous asphalt overlay, but recently also the grinding are an...

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.

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...

Short description of the rehabilitation works on the most heavily trafficked motorway in Belgium.