After a long period of experience in concrete road coad construction a new type of pavement is under supervision. Reasons to develop a new type are some disadvantarous experiences with concrete slabs resting on supporting layer of hydraulically bounded material and the need to reuse old pavement materials. The new...
Pre-Evaluation of Hydro-Demolished Concrete Surfaces by Dulled Core Testing
The paper contains investigations of concrete debris generated during the compression testing of drilled cores and during hydrodemolition, l3ased on sieve analyses, average diameters of the debris samples are estimated. It is found that a fairly linear relation exists between the average size of the debris generated during the compressive...
Ultra-Thin Whitetoppirig Ontarios Experience
Ultra-thin whitetopping (UTW) is one of the newest and most innovative applications of portland cement concrete. The technique entails bonding a relatively thin layer of concrete onto an existing asphalt pavement. This technique was conceived in the United States of America and the first experimental project was built in Louisville,...
Test-Methods on Road Concrete with a Very Porous Structure
Research is carried out in the Magnel Laboratory - Ghent University into the properties of road concrete with a very porous structure, enriched with polymer emulsions. The aim of the tests is to optimise the composition of the porous concrete. In this context, the choice of the type of polymer...
Research Into Concrete Block Paving with Realistic Load of a Heay Vehicle Wheel
Within the scope of a research project different block pavings have been studied under realistic load of a road test machine considering the influence on the resistance to vertical deformations and horizontal displacements.
Urban Rigid Pavements in Italy
Since the end of the Second World War many of the urban road pavements that had been executed in concrete have been gradually repaved with bitumen. As a result of the problems induced by increasing traffic rates, rigid pavements are now gaining new impetus also within urban road networks. PIARC's...
Experimental and Numerical Study of Behaviour of Concrete Pavements
The numerical methods are a fundamental tool in the analysis of concrete pavements. However, the numerical methods need experimental data in order to calibrate the model parameters. This means that only the use of both techniques, experimental and numerical, allows an efficient simulation of the behaviour of pavements. Therefore, a...
Dynamics of the Roads Evaluation of the Forces Transmitted from a Vehicle to the Road Under Different Loading Conditions
A simplified viscose elastic model is proposed which is able to simulate the dynamic interactions between a vehicle and the rigid pavement under different loading conditions (constant and linearly variable in time). The deformations are correlated to the length of the mobile loads and to the characteristics of the vehicle....
Adjusting the Moisture Content of Mature Concrete for Durability Control
The presence of a specified volume of definite-dispersity air voids in the structure of cement concrete does not quarantee the scaling-resistanceIr concrete pavements under the action of frost and deicing agents. Experiments show that partial drying of mature concrete before its saturation increases the concrete scaling-resistance, while conipleLe dLyirlg up,...
An Applied Research Programme on Continuous Reinforced Concrete Pavements
Continuous reinforced concrete (CRC) pavements built in France since this technique was first used in 1983 have pratically all been designed in the same way as pavements consisting of dowelled slabs. Owing to the circular form of the test tracks at fatigue facility of the Laboratoire Central des Ponts et...
Surface Drainage Techniques – Using Slipform and Extruded Concrete Machines
The adaptability of the process to most projects through prior design, the quality of constructions throughout the world and the complete satisfaction of users definitely allows us to conclude that these slipform techniques have reached a level of reliability and performance most appreciated by all clients and engineers, and that...
Joint Load Transfer Testing
The paper describes and evaluates plate hearing tests performed on airfield CC slabs, in order to ascertain the interaction of slabs across transverse and longitudinal joints and the joint load transfer. The applied characteristics of mad transfer I .T and T ,TF, varied, however. the great significance of temperature and...