Design

During recent years studies have reported the crises involving deficiency or deterioration of a considerable portion of the Nation infrastructure. Many concrete structures need repair and strengthening for several reasons, such as expired design life, changes in functionality, damage caused by mechanical actions and environmental effects, more stringent design requirements,...

An empirical concrete pavement design method, based on mechanistic principles, was developed for use by the general practitioner. It was recognized that the outcome of the design process should not concern only layer characteristics and risk of failure, but also the area of pavement possibly afflicted by a particular mode...

The goal of the BENOR certification scheme was to guarantee the manufacturing of high quality concrete and the building of better concrete roads and accessories with a lower cost. This was achieved by establishing a certification scheme based on the will of all the actors involved in the building process,...

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...

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...

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...

Between September and November 2002, an inlay in continuous reinforced concrete was constructed on the A10 motorway between Groot-Bijgaarden and Ternat. The main components of the section of road are concrete slabs that are overlaid with asphalt surfacing. The work was performed in the shortest possible period, during which the...

The general type of concrete structures on German highways is the Jointed Plain Concrete Pavement (JPCP). Contraction joints are saw-cut with a standard spacing of 5,0 m perpendicular to road axis and sealed by a bitumen based or elastomeric joint filler. International experiences indicated clearly that faulting at undowelled transverse...

How do you undertake the repair of a jointed concrete carriageway on one of the busiest motorways in Europe, particularly when a large proportion of the joints have failed and the slabs are floating on a sea of Gault Clay. With differential settlements so severe that there was genuine concern...

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,...

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...

The main difference between pavements and other elements made of concrete is the surface property. The surface in concrete pavement must be finished properly. It has been known for a long time that air-entrainment can be used against freezing and thawing deterioration of concrete pavement slabs. In the freeze-thaw attack,...