The paper describes an application of ultra-thin white-topping on a bituminous factory pavement. Different road cement concrete mixes were studied: high-strength concrete, concrete with PP fibres added, concrete modified with latex, concrete made by tyre-rubber grains instead of natural aggregate and steel fibre reinforced concrete. The binder was CEM II/A-L...
Reconstruction of a Cement-Stabilised Fly-Ash Road-Base
In 1999 - in the province of Noord-Brabant in the Netherlands - an eighteen-year-old asphalt road with a cementstabilised fly-ash road-base, appeared to be in bad condition. Further investigation showed that the base was almost completely disintegrated, probably due to bad drainage and due to a possibly low cement content....
Experimental Validation of Rigid Road Structure Design
surfaces, which is a product developed by the BRRC (Belgian Road Research Centre) and Febelcem (Federation of the Belgian Cement Industry), it became clear that it would be necessary to conduct onsite validation in the area of rigid roads. In particular, the various hypotheses regarding the effectiveness and durability of...
Concrete Roads in Pavement Management Systems from Technical To Political Responsibilities
CROW published in 2001 in the Netherlands the new national methodology on Pavement Management Systems on asphalt, block pavements and concrete roads. DHV has been the author of this publication. Two major improvements are implemented in this new methodology: 1. concrete pavements are fully included 2. a connection has been...
The High-Performance Concrete Carpet, a New Type of Concrete Course Layer
The paper gives an overview on an on-going R&D project carried out by LCPC (France). The aim is to develop a purely hydraulic road structure in accordance with modern infrastructure requirements, which may also be used to rehabilitate old rigid pavement. The High-Performance Concrete (HPC) carpet consists in building a...
Effects of Freezing Thaw in Concretes Produced with Different Cements
Serviceability of the concretes that undergo such effects of repetition of freezing-thaw is greatly affected by water-cement ratio, permeability, composition of the cement and mineral additves. Water-cement ratio being between 0.40-0.50, the concrete having a structure without any voids, using a cement with mineral additives, increase the resistance of the...
Durability of Concrete Roads with Blended Cements
The study was conducted to bring out the salient features of blended cements, which go a long way in establishing the durability of rigid pavements. Blended cements not only enhance the life cycle of concrete road by protecting it from chloride and sulfate attack but also reduce the thermal cracking,...
Accelelated Loading Test of Porous Cement Concrete Pavement to Evaluate Durability and Permeability
This paper presents results of study on evaluating durability and permeability of porous cement concrete pavement by accelerated loading test at PWRI pavement test track. The following procedure was conducted to evaluate the durability and permeability of porous cement concrete pavement. Three test sections were constructed in 1997. These sections...
A Fast and Comfortable Public Transport Lane in Continously Reinforced Concrete
The Zuidtangent is a free high quality public transport lane between the city of Haarlem and Schiphol Airpoprt. The full trajectoryi s built in continouusly reinforced concrete. In this paper some design aspects are described. Also the use of concrete as a wearing course on bridges and in tunnels is...
Measuring Device For Determining Dowel Positions on Concrete Slabs
and to secure the height position of the individual slabs. They must be positioned in the middle of the slab thickness so that they do not prevent longitudinal motion of the slabs. In modern concrete pavement construction the concrete is poured over the entire cross section width using slip form...
Overview and Comparison of the New Belgian Standard Specifications For Concrete Roads
Belgium is made up of 3 regions: the Region of Flanders, the Walloon Region and the Brussels Capital Region. Managing and maintaining the national trunk roads is a regional matter and therefore also carried out in Belgium by three different administrative authorities. Each of these administrative authorities has drawn up...
Life Cycle Cost Analysis Allows to Identify Profit Areas of Concrete Pavements
The need for constructing road pavements characterised by controllable technical performances, high durability and reduced construction and maintenance costs, led to the development of design criteria and procedures for the technical and economic appraisal of the pavements based on Life Cycle Cost Analysis (LCCA). New materials, new technologies and innovating...