With the development of draining concrete as a super whispering surface, the German Cement Industry has signalled a new era for the concrete structure. This special draining concrete is a so-called like-grained concrete with a cavity content of 20 - 25 vol.-%. The individual aggregate grains are cemented with a...
Draining Concrete – the Material for Today’s and Tomorrow’s Roaris, Quiet – Safe – Environment-Friendly – Production – Characteristics – Application
The Behavior of Concrete Block Pavements
In 1981 to 1985 and 1993/94 static and dynamic tests on block pavements were carried out on a 1:1 scale at the professorship of Road Construction at the Technical University of Dresden. The pavements were loaded with a plate bearing test equipment (approx. 0.7 N/mm 2) with a static stress...
FEM Analysis on the Dynamic Behaviour of Concrete Road Superstructures
As a general rule procedures for the sizing of road superstructures only refer to static stress. Possible dynamic effects induced by loads are introduced by amplifying their intensity or by considering the dynamic modulus of the materials. Under variable stress in time, the real behaviour of a superstructure is remarkably...
The Use of Nuclear Gauges on Concrete Roads Under Construction
To ensure the satisfactory performance of rigid pavements, it is necessary to control the air content of the concrete slabs. The aim is to maintain a prescribed quantity of cntraincd air in surface slabs to rcducc frost damage. Also, it is required to minimise the quantity of air, which results...
Enlargement of the Belgian Motorway E40 Brussels-Liege in Kortenberg
The section Brussels-Louvain of the motorway E40 was constructed in 1971 with a pavement in continuous reinforced coticiete fui the tlnee tiaffic lanes and an asphalt pavellielli for the elulergency lane. tue to the increase of heavy traffic, the Flemish Government decided the construction in 1994 of a fourth traffic...
Effects of Loss of Support on the Residual Life of JPCCP
One of the most frequent ajid insidious distresses in Jointed Portland Cement Concrete Pavements (JPCCP) is the loss of pavement support near the joint. This problem is principally caused by a lack of maintenance ofjoint sealing that can give rise to the well-known phenomenon called pumping in the presence of...
Performance of Precast Prestressed Concrete Pavements Prestressed at Joints
The precast prestressed cornrele pavement (PPCP), which allows rapid execution of repair works such as these on intersections, is inasinglyuse1 these days. It contains many joints that conventionally take the form of dowel bars, which, however, are reported to be vuhierable to damage by rainwater seepage and other factors. To...
Multifunction Concrete Roadways Potericitls in Urban Areas
Combating noise, disturbances and safety hazards on transport infrastructures is one of the leading preoccupations indicated by 85 % of city dwellers in industrialised countries. The road concrete industry has fully realised this real challenge for durable building and maintenance of concrete roads capable of controlling disturbances caused by urban...
Cement Concrete Public Highways Recent Developments in Technical Literature and Applications
In a still recent past, research and innovation in the field of concrete pavements progressed mainly within the field of high volume pavements for roads and airports. This sustained and productive effort remains, giving rise to an expertise well documented in technical publications. Several countries converge in adopting constructive measures,...
Stresses Analysis of Cemented Bases on Concrete Pavement
Traditional methods for road concrete pavements design do not take into account the structural contribuition of cemented bases and its fatigue consumption uiidei the traffic loads. Sections designed without major care about the structural reponses of those bases can develop early cracks, decreasing the structural capacity of the pavement. This...
Combined Mechanical and Thermal Loading on Plain and Steel Fibrez Reinforced Concrete Pavements
Plaiti aiid steel fibre reinforced concrete beams are subjected to solely thermal; solely mechanical and combined thermal and mechanical loads while the rotation of the beam-ends are prevented. The variables in the tests are type of load and combination of loads. In order to estimate the degree of restraint, some...
Air-Entraining Agents in Road Concrete Code of Good Practice and Field Experiments
Air-entraining agents are increasingly recommended as a mean to counteract the ever more severe deterioration of road cement concretes in winter. However, their use is still raising problems as far as the specifications and the practical implementation of the technology are concerned. The results of research conducted by BRRC and...