Pavement evenness is one of the characteristics that are most directly felt by the road user. It determines not only driving comfort and safety for obvious reasons, but also the dependability and operation costs of vehicles. Evenness is measured using longitudinal profile surveys produced by the A.P.L. (longitudinal profile analyzer)....
Assessment of the evenness of cement concrete pavements and study of the means to achieve high quality evenness
Minor roads in concrete
In France, bituminous construction has for decades customarily been used for all kinds of minor roads. There are a great many reasons to explain this tradition. All the same, experiments with concrete have been made year after year, and some day, as a result of further dissemination of information and...
Thick concrete overlays in Belgium
The technique of con5tructin~ thick concrete overlays is at present being greatly developed in Belgium. Three periods are to be distinguished in overlay construction in this country: 1960 to 1969: experimental phase in which 210.000 m2 of overlay was constructed; 1970 to 1977: the second phase, in which the results...
Noise protection walls (Design and construction)
Since 1972 between 250,000 and 300,000 m2 of acoustic screening (noise reduction) barriers have been built in France, i.e., 70 - 80 km of such structures of medium height (2 - 6 m), along the roads. They have been installed under a policy of both road and rail traffic noise...
Microcracked semi-rigid structures
Under present economic conditions the use of bitumen is being reduced as much as possible. For more than twenty years the application of semi-rigid pavements has revealed the drawbacks but also the advantages of such structures. The chief advantage is their low cost, which can be further reduced if the...
Construction and performance of concrete pavements in Bavaria
For economic and environmental reasons various motorways in Bavaria" have been provided with concrete pavements in recent years. In this form of construction the concrete slab and cement-bound sub-base are laid direct on the subgrade. On two new sections, near Regensburg CA 3) and near Rothenburg CA 7), the so-called...
The road: The multifunctional structural element in agricultural areas
Farm roads in interdependence with higher-ranking roads form int~grated traffic networks for the benefit of the rural and urban population. With -tbe many and vari~d duties that such roads perform they func tian more particularly as aids to agricultural and forestry development projects, with effects extending even into the ecological...
Experience with thin bonded cement-bound overlays in Austria
In Austria bonded overlays only 35 mm thick are made using a superplasticized concrete with a wie - ratio of 0.35 . The overlay has to be moist-cured. For thicknesses of only 20 mm a special latex addition is used. For good bond the concrete is brushed vigorously with a...
Concrete safety barriers: conditions of utilisation
The theme of safety for the vehicles on the road is very important and involves problems of several kinds. A system to limit the damages produced by the road accidents consists in placing at the edges of the road fixed and continuous obstacles which are called "safety barriers". In Italy,...