Since 1975, the year in which the first continuous concrete plant was introduced for a road construction project, the use of a continuous production process has become more widespread, and even generalized, in France. Applications in other European countries have started to appear, yet do remain in the nascent stages....
Flexural Strength of High Performance Concrete
High strength concrete (HSC) having a flexural strength considerably higher than that of ordinary pavement concrete would be a suitable material - to replace only a single lane of concrete pavement deteriorated by heavy duty traffic (see Fig. 1) or - for constructing new pavement for high load with limited...
Concreting Bombay Metropolis Roads in India
Deterioration of Bombay Metropolis roads during rainy season is a perpetual phenomenon. During the monsoon of 1988, the major roads constructed with hydrocarbon binders suffered severe damage causing great inconvenience to the users. In view of the mounting pressure from the public, at large the municipal authorities decided to switch...
Evaluation Method for Jointed Concrete Airfield and Pavements
In order to harmonize FWD condition surveys on concretee pavements in the Netherlands, CROW's committee UEC1 has developed an structural evaluation procedure for jointed concrete airfield pavements. The committee has developed procedures for in-situ testing and models for determining of the mechanical pavement properties based on FWD measurements. With respect...
Cracking of Continuously Reinforced Concrete Pavements at a Young Age
Calculation of steel-concrete structures calls for understanding the bonding mechanisms, then, to reproduce them, formulating models of behaviour representative of the interface between the two materials in contact. In view of the researches already performed in this domain, we thought it essential to make use of a new test that...
Thin White Topping in Vienna
Conventional maintenance of rutted asphalt roads means resurfacing in short intervals or substitution of thick layers. Therefore, a new repair method was tested: Milling the top of the existing asphalt pavement, cleaning the surface and plaeing a dan layci of high performance concrete. The behaviour of the composite structure was...
Whitetopping and Ultra-Thin Whitetopping – the US Experience
Concrete overlays of existing asphalt pavement, referred to as "whitetopping," is one of the most rapidly emerging technologies for rehabilitating pavements in the U.S. Although its use can be traced back to 1918, conventional (or classical), whitetopping became routinely used in the mid-1970's with use significantly increasing in the 1980's...
Scope of the Activities ot the Joint Research ProgidrIlille on Concrete Roads in the Netherlands
In comparison with Germany and Belgium, the Netherlands only have a small amount of cement concrete roads. Asphalt is a Dutch tradition. However, the idea of building concrete roads is slowly coming back into favour. A broadly based Steering Group is investigating how and where cement concrete can be used...
Evaluation of Performance and Structural Design Methods of Cement Concrete Pavements in Japan
This paper examines cement concrete pavements built on japanese national highways since 1971. An investigation of pavement cracks supports the validity of the current structural design methods. The results of the analysis of the relationship between slab thickness, cracking and cumulative heavy traffic volume show that commonly used jointed reinforced...
Testing of Rut Filling on Concrete Pavements
In 1991 a concrete rut filling on an old concrete pavement at the highway E-1 8 in the southern part of Norway was performed. The rut depth, caused by studded tyres, had reached 23 mm, and the pavement required rehabilitation of the ruts. The intention with the filling was to...
New from Old – Recycling Concrete Pavements
About 50% (150 km) nf the ennerete pavement on the motorway Al Vienna-Salzburg are older than 30 years and need reconstruction: The recycling method developed in 1 989/90 is based on the principle of making new from old. The old concrete pavement is used as a quarry and provides the...
Concrete a Material for Urban Development
These last years, the development of the road network in urban areas of France has taken a new direction. The aim is to improve the users safety as well as the traffic conditions. This new trend requires a geometrical development of urban areas, with regard to safety, aesthetics, intcgrotion into...