Highways

Reinforced concrete railway superstructure type (non-ballasted) is becoming more widespread and important in the world, similarly in Turkey. This type can be used both in all of the light rail systems of urban transport and also the high speed rail systems of intercity transport. Although its construction cost is higher,...

A new, reproducible test method for curing compounds has been devised. This method is based on concrete made using 400 kg/m³ of cement and 0/8 granulates. Eight different curing compounds were tested. A linear relation was found between effectiveness after 7 days at 35°C and 40% RH and relative compressive...

In this paper, portland cement concretes and concretes with blast furnace slag cement were studied to determine the parameters for strength and chloride permeability under different curing procedures. For this purpose, four concrete mixtures were made at two different water cement ratios of 0.45 and 0.65 with cement contents of...

In this article a research program on performance-based durability design of concrete highway structures conducted at Wayne State University is presented. The relation between concrete durability and its soundness (freedom from cracking) is described. A measure of concrete soundness based on ultrasonic pulse velocity developed during this research that incorporates...

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...