One way of upgrading crushed stone sand is to add cement, for the purpose of using it in a foundation layer. The authors report on their experience with stabilization by means of cement and with the use of the material in the foundation of a motorway work site. The previous...
Wear Resistant and Noise Reducing Concrete for Road Pavements
Rutting, depending on the wear of studded tyres, is a problem in the Skandinavian couritiis. Concrete pavements have a good wear resistance. In Ai.ustria they have recently developed a low noise concrete with small aggregate size and exposed aggregate. Earlier experiences have shown that the wear resistance of concrete is...
Enlargement Works at the Airport of Liege (Belgium)
The airport of LiOge in Belgium has been the subject of major works for several yearjSince the country was regionalized a few years ago, the Wlloon Region has invested over 1,5 milliard Bel g ian francs. Several new buildings have already been constructed.rThe most spectacular wor, however,lTs the enlargement of...
New Opinions in the Friction Problematic with Brushed Textures and Exposed Aggregates
Washed or fine brushed concrete was introduced in the Netherlands, replacing rough brushed concrete, to reduce the road noice. In many cases the minimum friction coefficient required was not reached. However, measurements carried out some months later showed an improvement of the results. To investigate if this improvement of the...
Concrete Pavements in Heavy Rain Areas
The difficulty to build roads in heavy rain areas is illustrated through the reconstruction of the road going from Pasto (the capital of the Department of Nariño) to the port town of Tumaco, in the vely South of Colombia at the Pacific Cost and the border with Ecuador. Despite this...
Compressive Stresses in Concrete Pavements and Related Maintenance Problems
The M20 motorway between Junctions 3 and 5 near Maidstone (UK) is an unreinforced pavement with joint spacings of 5m and 6m, comprising warping joints with contraction joints every 30m. The pavement was constructed at the beginning of the 1 970s. A contract for maintenance between Junctions 4 and 5...
Recycling Concrete Pavements in Motorway Construction
Concrete, which has withstood all the loads on heavily used roads for many decades, can be used again as a concrete aggegrate in road pavement construction after undergoing appropriate treatment. The example of four pavement batches prepared by 2 different companies in 1992 and 1993 on the A27 motorway m...
Concrete Block Pavement Structure with Porous Concrete Base
Heavily trafficked concrete block pavements (CBP) require a proper designed cement treated base, which however i.g. offer only a low water permeability. Hence water may accumulate in the beddinq layer and under unfavourable climatic conditions frost heavings and deteriorations can occur. This can be prevented by a base course of...
Experimental Study on the Correlation between the Mix Factor and the Compactability of Concrete for Roller Compacted Concrete Pavements
This study was carried out to examine the correlation between roller compacted pavement concrete mixes and the compactability with surface vibrator. Two factors are significant for the consistency of the concrete: the sand/cement ratio of the mortar component by weight and the coarse aggregate/ mortar ratio by volume. The most...
Elastomer Profiles for Concrete Roads
Since 1985 more and more elastomer prnfiles MA iiced for longitudinal and transverse joints of German highways to get a watertight filler between the concrete slabs. Specially designed highway profiles are compression seals that can be installed even under wet and cold weather conditions. They can follow very large joint...
Status of a Five Year Old 170 mm Thick Jointed High Strength Concrete Pavement in Norway
The current pavement is a 8.6 km long part of the main highway North of Oslo. The concrete has a characteristic cube strength of 90MPa and the slab thickness is 170 mm. The subbase mainly consists of local natural sand and gravel. The general condition of the pavement is rather...
Noise Reducing Techniques on Existing Continuously Reinforced Concrete Pavements on Belgian Motorways
Most of the Belgian Motorways, with a concrete pavement, have a deeply grooved concrete surface. Although those wearing courses have a very good skid resistance, there is a great concern about the noise pollution. Not only noise barriers and the porous asphalt overlay, but recently also the grinding are an...