Resources

To improve the surface quality or the water drainage and the service life of a mediocre damaged concrete pavement, this pavement can be overlaid with a 4 to 6 cm thick asphalt layer. The status of the concrete pavement and of the joints with respect to potential reflection cracks needs...

In Spain, like in other European countries, during the last twenty years roads constructed with cement bound base layers have had many maintenance problems due to reflective cracking. It is impossible to know the effectiveness of the new treatments which are applied as anti-reflective cracking measures. Therefore a laboratory test...

In Germany the use of concrete with aggregates obtained from crushed concrete (RC aggregate) has been quite limited in comparison to other countries such as the USA and Austria. This situation is caused mainly by the lack of appropriate regulations for this kind of application. For this reason, the award...

"MAIA" is a slotted driveable gutter used for the drainage of motorways and airports. T.S.S. adapted the SATUJO slotted gutter method to be realized on a slipform paver. The new concept is based on the insertion of an air inflated reusable flexible tube on a slipform paver which enables the...

In the Netherlands Rijkswaterstaat is the authority in charge among others of the construction of highways. The department Limburg of Rijkswaterstaat has chosen a continuously reinforced concrete roadbase for the construction of the 12 km long new highway section between the cities of Venray and Boxmeer. This choice was based...

The main goal of curing is to protect the young concrete against drying out. These investigations indicate, that concrete temperatures during the first day of hardening are decisive for the magnitude of thermal stresses of the hardened concrete and the related cracking risk. High thermal tensile stresses occur, if the...

This paper concerns a joint research programme being undertaken by the Roads and Traffic Authority of New South Wales (Australia) and the Cement and Concrete Association of Australia. The objective of the research is to develop quieter concrete road surfaces, whilst maintaining acceptable skid resistance, by modifying the surface texture...

Increasing traffic loads and new environmental criteria have led to more stringent requirements for the surfacing of roads. At the same time, practical experience and new methods have improved the construction of concrete road surfaces. In the light of these developments, it was also necessary to adapt the German technical...

Many areas in western Europe suffer trom congestion of traffic during peak hours, mainly on motorways leading to and situated near the economic centres. Therefore, authorities plan to widen several motorways in order to improve the mobility. In the Netherlands the widening of approximately 400 km motorways is expected to...

Waste disposal is a serious problem for local authorities and the search for alternative solutions which allow for reusing is necessary. rin public works on roads or sewer systems,new techniques, new types of materials and new approaches are coming to the front, including the consideration of "environmental costs" besides technical...

Two test sections were constructed with a base course of porous concrete under the emergency lane of a motorway. This base composed of new aggregates or recycled aggregates, has the strength of a cement treated base and the function both of bearing capacity and drainage. Mixed in Plant and placed...

Roller compacted concrete (RCC) pavements are expected to be an economic and rational concrete pvPmAnt system that will become increasingly popular in Japan. The maximum thickness of a RCC slab completed in one layer is limited to 25 cm because of limitations in the compactability of the concrete and the...