Seven experimental sections of thin overlay construction on old concrete and asphalt road pavements have been built in Belgium since 1982. These comprise a total area of 107 000 m2 of fibre reinforced concrete (five sections) of la cm and 12 cm thickness and 34000 m2 of continuously reinforced concrete...
Thin continuously reinforced concrete and steel fibre reinforced concrete overlays – Performance assessment after two and three years in service
New Jersey type safety barriers – Experiences in Belgium
This paper reports the experience gained by the Highways Department in Belgium in the construction of so-called New Jersey safety barriers during the past few years. First the reasons why the Ministry of Public Works gave up the more traditional protection systems such as steel or aluminium safety fences are...
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,...
An assesment of interlocking concrete block pavements
A number of interlocking concrete block pavements (lCBP's) in applications ranging from residential streets to a quarry access road have been monitored. This wc.rkhas included the changing nature of the block layer; particularly its stiffness. The latter quali ty has been assessed by means of the force required to remove...
Pavement monitoring and heavy maintenance on the Geneva-Lausanne motorway
The Geneva - Lausanne moeorway, which was commissioned in 1964, comprises about ~5 km of concrete pavement consisting of 20 cm thick doweled slabs (10m x 4m) resting on a non-stabilized 55 cm thick gravel-sand sub-base (0 -100 mm particle size). The subgrade consists of non-stabilized natural insieu soils as...
State of the art of concrete safety barriers
In 1976 the ~ew Jerey concrete safety barrier and the experience gained internationally with it was for the first time brought to the attention of interested persons in highway authorities, research and industry in the Federal Republic of Germany. Four years later, the first pilot projects were implemeneed in this...
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...
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...
Determination of slab rocking at the joints of a cement concrete pavement
The amplitude of the deflection at the ends of the slabs at the transverse joints under the passage of a heavy load is an impo.tant c.iterion for assessing the effecciveness of the load transfe. at the joints and for the degree of deterioration of the carriageway. The technique applied at...
Experimental section of railway track on a reinforced concrete continuous slab
In 1975, on the Madrid - Barcelona railway line, an experimental section without ballast was constructed with a view to obtaining a track which would be of sufficiently good quality for use by fast trains while costing less to maintain. The 4,IOO-m-long section was located on a part of the...
Commnon loadbearing effect of concrete pavement and cementbound sub-base
The combined load bearing action of the concrete pavement and the cement-bound sub-base (CRSB) has a favourable effect on the long-cerm behaviour of che road structure in the case of unreinforced concrete road slab construction wichout expansion joints. as has proved effective in Germany: - Because of che roughness of...
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...