Increasing demands are bein~ made on joints in conérete roads by greater traffic 'voluines anld heavier loads. Most joints 'perform satisfactorily, yet a small proportion fail in service, resultinn in expensive remedial work. The paper reviews the main types of joints, and problems associated with their construction and performance. It...
Joints in concrete roads – Aspects of construction and performance
Use of concrete block paving – Constructions in Belgium
Concrete paving blocks are an ideal material for the sufacing of trafficked areas, storage yards and residential roads in urban built-up areas. A number of examples of block pavings installed at Hasselt illustrate how it i~ thereby possible to create a pleasing "street image" which complies wi th the rules...
Bond characteristics for concrete overlays
Even though a bonded overlay has the advanta~es such as lower cose and fewer problems in matching adjacent facilities, ic has not been used widely in Japan. The reason is that bond characteristics in concrete overlays have not been revealed and insufficient bond in con~entional techniques has caused some problems...
Economic appraisal of cement concrete versus asphaltic concrete pavements
1. Introduction Since 1962 no cement concrete had been used in the governmental road sy~tem as a paving material. After 1975 the need to use this material again was felt more and more. Somewhere about 1982, during the decision making period regardi~g the type of pavement to be chosen for...
New developments in the construction of railway track bases without ballast
The conventional form of construction for permanent way, as first conceived about ISO years ago, adopted the ballast bed for supporting the railway track from what at that time was the most economical road building method, namely, macadam. By the same token, a p:esent-day innovative form of permanent way construt~...
New guidelines for the standardization of pavement structures 1986 edition (RStO 1986) – Comparative study at European level
The new standardization guidelines RStO 86 contain rules for the surfacing of roads and other trafficked areas with bituminous, concrete or block pavements, for fully cement-bound pavements as well as for cycle tracks and footpaths. Six pavement construction classes are distinguished, depending on traffic loading. For determining the construction class,...
Assessment of the evenness of cement concrete pavements and study of the means to achieve high quality evenness
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)....
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...