Highways

The surface (texture) of a concrete pavement has to endure the effects of traffic and the environmental load. At the Technical University of Munich, Institute for Materials and Structures the real stress from solvent, freezethaw and mechanical loads will be simulated in the laboratory as close as possible to practice...

The considerable increase of road traffic all over the world increases the demand for traffic surfaces with a longer lifespan and less repairs. When doing maintenance and repair works it is very important to keep short construction times in order to reduce obstruction to traffic to meet this challenge. A...

This paper describes a new rigid pavement constructive method employing hexagonals slabs, being the angle betwen the edges of the slabs at each corner, 120 degrees. This paper is based on the one titled ´´ NEW JOINTS IN RIGID PAVEMENT - HIGHWAY AND AIRPORT´´, of the 8th International Symposium on...

In Belgium, most of the actual road works deal with rehabilitation, maintenance and repair. For the Road and Traffic Administrations, the limitation of the traffic disturbance is one of the major challenges. Thanks to the technique of rapidly hardening concrete, known as ‘fast-track concrete paving’, cement concrete pavements are repaired...

There is a trend to work with the influence of roads on the whole society. The quality level, and the initial investment cost, for pavements and road superstructures, should therefore be grounded on Life Cycle Cost analysis (LCC). LCC or Whole Life Costing (WLC), is described in a PIARC document...

Concrete, which is susceptible to frost and thawing salts, is protected by adding an air-entraining admixture, which leads to air content levels of 3.5 to 6% being achieved. Another possible protection involves the application of a sealant which prevents water penetration. In this instance, resistance to scaling as a result...

Artificial paving blocks made with portland cement concrete are widespread in many countries. These paving blocks come in various designs such as Interlocking and Italian Flower, and they are produced in special machinery out of rather high quality concrete having about 50 MPa compressive strength. The reason for the concrete...

The paper presents the results of a study about the use of recycled tire and building materials in concrete for “whitetopping” on asphalt concrete paving. This report presents the results of laboratory experiments and field tests. These results were obtained with concretes using substitution ratios of 15% to 20% by...

The fast development of car technology has caused a steady increase in the speed of vehicles and increasingly higher demands on braking and traction. International studies show that every increase in average speed causes increase in personal injury accidents. Yet the present transport infrastructure in general and cement concrete pavement...

Concrete pavements which are placed during hot summer weather conditions, harden on the top side, due to the solar radiation, at higher temperatures, as is the case for the bottom side. As soon as the concrete cools down at the top side during the first night, the concrete pavement tends...

The roughness specifications of a recent Israeli PWD concrete road project, consisting of a 4-lanes stretch of a 7- kilometer length (Route No.3), included both bonuses and penalties in their pay-adjustment functions. The California-type profilograph outputs served as the data for these functions. The reason for using this particular profile...

The ‘Drève de Lorraine’ in Brussels is an old forestry road connecting the highway to the south part of Brussels. It has been built in 1925, using concrete slabs of 15 cm thick lying directly on the natural ground. After 78 years of good services, this road has been rehabilitated...