Resources

Almost all jointed concrete pavements in the Netherlands, varying from low volume country roads to dual carriage motorways, are designed with the ‘Vencon 1.0’ program. The program needed to be upgraded to the Windows operating system. The upgrade also gave an opportunity to reconsider the design models of the old...

In response to the growing importance of sustainable building, designers, consultants and pavement managers now tend to make more rational decisions than before when comparing the pros and cons of the construction, maintenance and management of various types of road pavements. Asphalt and concrete pavements offer specific advantages that need...

In the Netherlands reclaimed asphalt pavement is normally used as cold aggregate to produce recycled hot asphalt mixtures. However reclaimed asphalt pavement originating from porous asphalt pavement can not be used in this process. Therefore it would be valuable if these residual aggregates could be used in concrete production. A...

The precision and applicability of two non-destructive measuring methods for dowel bars alignment: • Ground Penetrating Radar (GPR) and the • Pulse Induction method (PI). was investigated. The project was sponsored by the German Federal Ministry of Transport, Building and Urban Affairs (Bundesministerium für Verkehr, Bau und Stadtentwicklung BMVBS). The...

Since 2001 the design with an interlayer of geotextiles is a standard structure in the German pavement catalogue RStO 01. Geotextiles shall guarantee uniform, elastic support of the concrete slab, hence reducing stresses due to temperature and moisture gradient, reduce pumping processes and prevent an origination of reflection cracks from...

Due to severe freeze thaw salt damage to concrete pavements on military airfields in the Netherlands, the Agency for Infrastructure of the Netherlands Ministry of Defence (DGW&T) decided to prescribe ordinary Portland cement (CEM I 32.5R, coded as PC) with air entrainer. The ENCI (First Dutch Cement Industry) is of...

From many decades concrete has been successively applied in road construction in many countries. The scale of these applications is different depending on local experience and tradition. Concrete pavement is many a time more profitable solution than bituminous pavements. It refers not only to the construction of motorways or express...

In the construction of airport pavements, one possible way to save resources and lower construction costs is to reduce the slab thickness by introducing high-strength concrete. Cost-saving would be even more effective if the high-strength concrete could be laid without using any special materials or construction methods. To this end,...

Durability, the absence of deformations and a low level of maintenance when the road structure has been correctly designed and implemented are the features which are generally unanimously approved as regards the qualities of cement concrete surfacing. In contrast, comfort and driving noise are the characteristics which lead to the...

The present study concerns the comparison of the behaviour at high temperature of an asphalt and that of concrete, the purpose being to define the parameters of choice of the material for the construction of roads, in particular in tunnels. To do this, laboratory tests of fire, thermal behaviour and...

This paper describes the usage of concrete safety barrier on high speed roads in the UK, drawing on experiences gained over the 10 years since their introduction, and the enhancements and improvements developed in this time. The paper is primarily concerned with in-situ slipformed concrete safety barrier and comments on...

Safety barriers are an essential device on roads, especially on highways. The European Standard EN 1317 defines the requirements of different safety levels that safety barriers have to comply with. Precast concrete and slipformed/cast-in-situ barriers are very successfully used as permanent barrier. Additionally precast barriers are a perfect solution for...