New laboratory and field investigations showed that it is possible to achieve durable concrete by using recycled aggregate above 4 mm from old pavements with cracks but no frost- or concrete structure deterioration. The concrete compressive and tensile strengths were slightly higher and the cracking sensitivity was slightly lower for...
Computer Aided Design for Flexible Pavements of Concrete Bricks
This paper describes computer aided design (CAD) software and methods employed for effective design of flexible pavements with concrete bricks. Pavements consisting of concrete bricks allow many different patterns to be used. An area which is to be paved with concrete bricks is divided into a number of subdomains which...
New Standard Design for Concrete Roads in Flanders (Belgium)
This paper describes the new pavement design catalogue for concrete roads in Flanders. The catalogue includes plain concrete and continuous reinforced concrete pavement. Structures for interlocking concrete block pavements were added. The catalogue contains structures for roads as well as for bicycle lanes. The structures are based on the concept...
A Simplified Stress Evaluation Method Considering the Loss of Contact Pavement-Support
The concrete pavements, being subjected to thermal gradients, gravity and traffic loads, are itol in contact everywhere with their support. The traditional calculation methods use mathematical expressions developed assuming the slabs completely in contact with the support or expression not considering the presence of gravity load and thermal gradients with...
Prediction of Soil-Cement Strength Gain
Prediction of the strength gain of soil - cement mixtures to be used as base or sub-base of roads is of practical importance. It is necessary to know with good approximation the strength developed under the 'in-Situ' curing conditions for a given age. This research work has studied the application...
High-Strength Concrete for Road Pavements Netherlands 141
The last decade, the technology to design concrete mortars with a high compressive strength have evolved tremendously. The strength of concrete has progressed upto strength values of 130 Mpa. The development of high strength concrete can give the traditional pavement construction techniques a new impulse. Due to the relatively short...
Non-Clinker Slag Binder
The solution of questions of using slag as a binder material vit1i different catalysts is highly actual, since it helps in broadening the nomenclature of binder materials. increases qualth' and durability of products containing these stags. Ecological problems of regions vitIi developed metallurgical industries are solved as well.
Continuos Reinforced Concrete Pavement for a Roundabout on Foam-Concrete Foundation
The work was undertaken by contractors Ooms Avenhorn. Work took place in the months of July, August, September and October 1995. The roundabout was opened for traffic on 6I October 1995 (photo 6). More than two years after opening of the roundabout and the road metalling associated with it, it...
Judgment of Compaction Degree of Rccp by Using Acceleration Waves on Vibrating Roller and Influence of Subgrade Bearing Capacity on It
The acceleration wave of the vibrating compactor under work is disturbed from the sine wave. In this research, the disturbance of acceleration wave was defined as degree of disturbance WD, the relation between compacting time, hearing capacity of ground, consistency of concrete, compaction degree of concrete, strength of concrete and...
Cracking of Continuously Reinforced Concrete Pavements at a Young Age
Calculation of steel-concrete structures calls for understanding the bonding mechanisms, then, to reproduce them, formulating models of behaviour representative of the interface between the two materials in contact. In view of the researches already performed in this domain, we thought it essential to make use of a new test that...
Repair of Concrete Pavements Using High Performance Concrete
When heavily trafficed concrete pavements are being renewed, the work generally has to be carried out under considerable time-pressure. A newly developed, high performance repair concrete is ideally suitable for such repair work on account of its high early and final strength as well as its durability. It is produced...
Requirements for the Application of Surface-Retarders in Whisper-Concrete Road-Projects
Although the quality of the surface-deactivator is very important, the surface-deactivator will only react to the quality of the concrete onto which the surfcedeactivator is applied to. Therefore the surfacedeactivator will not be able to compensate for segregations, unsuitable concrete mix-designs or mistakes in application, etc. It is always recommended...