In this study, effects of slags widely used as mineral admixture in concrete industry on chloride penetration of concrete were investigated. Three different slags were used as replacement of cement (PC42.5) by weight of 25%, 50%, 75%. Setting test , determination of specific gravity, determination of specific surface were carried...
Full Scale Pavement Tests of Exposed Concrete Aggregates: Acoustical Aspects and Friction Characteristics
Traffic-noise pollution has become an issue for many road authorities. Applying measures at the source i.e. interaction surface and wheel are an effective noise abatement measure and many quiet surfaces have been developed in the last decade. A relative silent surfacing is a concrete surface of exposed aggregates. The Dutch...
Concrete Roundabouts
As is the case in several European countries, Belgium is also constructing more and more roundabouts at busy intersections. They offer a better guarantee of a fluent, but at the same time safer, flow of traffic. The road surface of a roundabout is placed under a heavy load. In addition...
Dowels in Jointed Plain Concrete Pavements
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...
Repair of Concrete Pavements Under Op-Eration
Don't we all loath them traffic jams. Irrespective of how we are affected by them, either directly as a user of traffic infrastructure or as a construction worker involved with its upkeep or indirectly as a conscious citizen aware of their economical impact, we all wish they could be...
Backcalculation Analysis of Concrete Pavements Using Fuzzy Logic Approach
It is known that concrete and flexible pavements are similar each other from the structural view point. Nowadays, especially, because of the innovations in airplane technology, airplane weights have been increased. Therefore airport maintenance has become more important. It is possible to obtain information about structural performance of a pavement...
Effect of Concrete Road Roughness on Dynamic Response of Girder Bridges
The dynamic response of highway bridges subjected to moving truckloads is observed to be dependent on dynamic characteristics of the bridge, vehicle dynamics, and road surface roughness profile. Road roughness and the bump at bridge entrance between bridge and concrete approach slabs are the major contributors to the dynamic amplification...
Reasons for Cracking of the Cement Concrete Pavements from Strong and Frost-Resistant Concrete
World practice (USA, Germany) has already noted the cases of continuous cracking of the surface layers of cement concrete pavements. Continuous cracking becomes evident several years later after completing construction and results, as a rule, in deterioration of the performance characteristics of the pavements. The paper shows the results of...
Geotechnical Properties of Cement Stabilized Class-F Fly Ash
The geotechnical properties of cement added class-F fly ash have been investigated to assess the potential utilization of stabilized fly ash as embankment material. The engineering properties of the cement stabilized class-F fly ash studied include the compaction, strength characteristics and the durability as measured by wetting and drying tests....
Life Cycle Assessment (LCA) of a Concrete Highway
The environmental performance of a Swedish concrete highway was analysed by use of Life Cycle Assessment (LCA). As a base, a similar study carried out in Finland was used [1, 2]. The system investigated include extraction of raw materials up to the user phase (traffic and lighting). The intention of...
Temperature Differential in Concrete Pavements in Tropical Environment
Results of over one year monitoring concrete pavement slabs in São Paulo, where a typical hot-wet environment prevails, were presented. The experimental test tracks comprise 15 different concrete slabs instrumented with thermal resistors allowing the monitoring of temperatures. Over the course of the monitoring, it was sought the influence of...
Long-Term Behaviour of Concrete Pavements in Germany
Until about 1970 in general Jointed Reinforced Concrete Pavements (JRCP) with expansion joints were in use in Germany. In 1965, the highway administration came to be convinced for the first time by theoretical investigations to construct a Jointed Plain Concrete Pavement (JPCP) with short contraction joint spacing of 5 m...