To give guidelines for the mix design on high performance concrete with high wear resistance, and to study wear of high strength concrete, the Norwegian cement producer NORCEM operates a test rig specially developed for this purpose. The tests show concrete to give 2-3 times the wear resistance of asphalt....
Spanish Practice and Experience with Longitudinal Finish
Since slip-form payers were introduced in Spain in 1930, more than 1.400 km of two-lane concrete pavements have been constructed with them. A proportion exceeding 90% of the total has been provided with longitudinal finishes, using different methods: burlap, plastic-bristled brushes, metal -tined combs, etc. In all cases, surfaces with...
Some Aspects of the Construction of the Azraq to Jafr Highway Project in Jordan
Hot desert environments with low humidity and strong winds provide some of the most difficult conditions in which to build good concrete roads. This paper briefly describes the materials, plant and some of the methods that were used to successfully construct the Azraq to Jafr highway in Jordan where these...
Thin Concrete Overlays on Old Flexible Pavements
Extensive rutting exists on many high volume traffic roads in Sweden. Traditional maintenance means asphalt resurfacing every second or third year. Adding a thin high strength concrete overlay would prolong the service life of the repair due to the high wear resistance of this kind of overlay. To study the...
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...
Slovenian Experience with RCC PCC Construction
This article describes the Slovenian experience with PCC technology on four different sites with different requirements and for different purposes. The job mix formulas and the different application possibilities are described. Paver compacted concrete (PCC) is a relatively new construction method which was evaluated from roller compacted concrete (RCC) technology....
Evaluation of the Reliability of Concrete Pavements Considering the Fatigue Properties
In the mechanistic design method of concrete pavements, the flexural fatigue properties have a great influence when analysing the design life. Accordingly, the purpose of this study is to clarify the effects of stress ratio (YmIn/cmax), maximum size of coarse aggregate and static flexural strength of the pavement concrete on...
New Standards in the Construction of Aircraft Movement Areas
Airport runways and other aircraft movement areas are among today's most important infrastructure elements. The paper gives an introduction to general aspects of design and construction of concrete airport pavements, emphasizing the advantages of the two-course "wet on wet" placement technique. The above mentioned aspects are illustrated by the description...
Low Noise Concrete Pavements in Germany
Noise protection has been a main concern in Germany for a long time. The contribution of the road surface to the reduction of traffic noise is recorded with correction values and taken into consideration in noise protection calculations which are legally significant in the planning and construction of roads. These...
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...