This paper presents aspects of liquid sealant installation and behaviour in joints in concrete roads under South African con-ditions. It covers joint preparation, installations techniques,quality control and field testing. A description of the generictypes of liquid sealants is given as well as behaviour charac-teristics obtained from laboratory tests which included:...
Improvement of the Road Surface Evenness of a Concrete Pavement by Grinding
Diamond grinding of a new concrete pavement surface produced an improvement on the road sur-face evenness which was evaluated in almost twounits in the International Roughness Index scale(mikm). This improvement was achieved mainlybecause of the removal ofroad irregularities withshort and medium wavelengths (0,5m
Cements For Concrete Pavements Mixed Cement Or Type V with Fly Ash
In Spain the development of cement, specially for concrete pavements, has been based on making use of fly ash in cement production. Such a development was achieved after studying the characteristics of the available fly ash and the respective experiencies. The results led to a widespread use of this type...
Precast Concrete Footway Paving Slabs That Resist Vehicular Overrun
This paper presents research into the design of square precast concrete paving flags ranging in plan size between 600 mm and 300 mm square. A design method for these paving flags overrun by vehicles is presented. The method shows that the existing test procedure underestimates the paving flag strength and...
Cement Concrete Secondary Roads Management Using the Belgian Road Research Centre Gersec System
A pavement management system for secondary road networks has been developed by the Belgian Road Research Centre for local government agencies and municipalities and handles both cement concrete and bituminous pavements. The system called GERSEC integrates technical approaches and economical evaluations with a view to optimize the distribution of the...
Rapid Rehabilitation Techniques with Cement Concrete_ Applied on Deformed Asphaltic Roads
On asphaltic roads the so called «wash-boardeffect » in front of traffic lights is a well known phenomenon. Regular reconstruction of these areas places a significant and recurrent burden on road managing authorities. Because of the large volumen of traffic at these intersections repair works also lead to a huge...
Developments in Australian RCC
Australia has now over three years of experience in the use of high strength RCC in pavements with over 40 projects completed. Whilst the majority of Australian projects have been relatively small in comparison to American and European experience, nevertheless they have enabled a continued development of design, construction and...
The Design of Concrete Pavements and Overlays
This paper describes a method developed by the Belgian Road Research Centre for the design of cement concrete pavements and overlays. The object of this method is to avoid fatigue cracking of the surfacing (or overlay) and excessive permanent deformation of the subgrade soil. It results from the application of...
Correlation Between Research and Construction of Concrete Roads
During the past two decades, the practice-oriented research work done when concrete roads are built has lead to further development of slab construc-tion, to new solutions to individual constructio-nal problems, and to development of new cons-tructional methods. Based on existing research re-sults, more reliable statements can be made on thedegree...
Ways of Reducing Tire-Noise on Concrete Pavements Experience and Tests in Austria
Tire-road noise can be reduced considerably by providing a suitable surface geometry. According to the new Austrian specifications pa-vers must be fitted with a longitudinal smootherto eliminate any transverse waves produced by thebeams of the paver. In order to obtain a noise-reducing surface a longitudinal texture (e.g.. a burlap drag)...
Porous Concrete For Urban Pavements
Over the past few years, interest in the uses and applications of porous cement concrete for pave-ments has been growing. Its position in pavementconstruction has developed to such an extent thatit iscurrently used in places of greater importance(from shoulders to sub-bases, and even surfaces).This paper is part of the experience...
Urban Road Pavements the Landscaped Pavement Concrete
The new concept of the urban fabric is taking on extension and is testifying increasingly to the fact that in our cities the street is not a road. Cement concrete designs have been staying abreast of these developments and architectural concrete is just one of the significant outgrowths of these...