The construction of continuously reinforced concrete overlays across the full carriageway width on busy motorways involves the need to make certain technical choices with respect to the materials employed (especially the cement), the plant and methods for carrying out the work and the organization and planning of the job, having...
Continuously reinforced concrete overlays on various French motorways Constraints of a technical nature and due to the organisation of sites operating under traffic
Maintenance and Rehabilitation of Concrete Roads
For the repair of concrete roads to be effective and economic it is essential to have planned maintenance procedure. Details of such a procedure are to be published in the forthcoming publication "Manual for the Maintenance and Repair of Concrete Roads" ,which is to be adopted for roads administered by...
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...
Concrete pavements without and with dowels
The deformation behaviour of a transverse joint, without and with dowel bars, under the passage of a wheel, as calculated with the aid of Westergaard's formulae /1/ is represented in fig. 1. This shows that when there are no dowel bars and no aggregate interlock across the crack (efficiency index...
Construction alternatives for drainage when reconstructing motorways
Arrangements for surface and for the harmless di.scharee of saepaee water are dealt with. A differentiated analvsis of the long-term behaviour of the solutions adcp ced is g~ven, depending on the substantially different soils occuring as road foundation and subgrade. In connection with surface drainage the drainage arrangements at the...
Use of and construction method for concrete block paving in the Federal Republic of Germany
For hundreds, indeed thousands of years, the only form of road surfacing was with stone blocks. The invention of tbe internal combustion engine and the tremendous growth of motorization, in conjunction with the use of asphalt, thrust the block-paved road into the background and bad a major effect on the...
Cost- effective restoration of jointed concrete pavements
This paper will summarize results from a major research project on the repair of jointed concrete pavements in the USA. The study approach involved: (I) a comprehensive evaluation of current and new alternate methods of joint/crack repairs, (2) selection of the most promising techniques, (3) the development of design and...
Critical assessment of various construction techniques
The long-term behaviour of various types of road pavement construction can be estimated or prognosticated from a methodical assessment of the condition of the roads and the associated data collection. Prognoses can be made not only with regard to technical cri teria, but also with regard to overall cost trends...
A British Railway Slab Track Project
Paved concrete track (PACT) is a continuously reinforced profiled concrete slab laid by a purposedesigned sLi.pf'o rm paving train on which the rails are continuously supported. This paper traces the development of the system by British Rail and includes a detailed description of the components of the system and the...
Developments in concrete road construction – European survey
A survey of European concrete road construction is presented on the occasion of the fifth International Symposium on Concrete Roads. The Synoptic Table 1986 c~nta~ns in tabul~r form the principal data and guidel~ nes for the des~gn and construction of motorways and other roads of con~rete in 15 European countries....
Surface treatment of limestone concrete slab with the chipping technique
Since 1980 the technique of pavement construction with thick concrete slabs has been applied on 100 km of the A.26 motorway (Calais - Reims) in northern France. The concrete employed is made with regional limestone aggregates. In order to counteract lowered skidding resistance due to wear of these materials, a...
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...