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...
Prediction of Soil-Cement Strength Gain
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...
Environmental Impact of Concrete and Asphalt Pavements
As part of a Nordic R & D project on sustainable concrete technology initiated by the Nordic cement industry, a study has been carried out by VTT, the Technical Research Centre of Finland, to assess the environmental impact of concrete and asphalt pavements. The assessment is based on the estimation...
Concrete Road Design a Special Urban Solution
Theme: in 1994 a rigid pavement solution was implemented on the underpass of the National Road n° 107 crossing the National Road nu 12, in the ambit of the remodelling project of the concerning cross-road roundabout, situated in the periphery of the city of Porto, involving only one extension of...
Concrete Pavement on a Crushed Aggregate Unbound Roadbase a New Design for Heavy Traffic Motorways
The construction method involving the placement of a 30 cm-thick concrete roadway pavement on a 30 cm-thick crushed aggregate unbound roadbase instead of a 2.6 cm-thick concrete pavement on a bound roadbase has proved its worth in Germany for more than 10 years, generally for heavy-traffic motorways. It has several...
Continuously Reinforced Concrete Pavements – from a Classical Conception to An Innovative Structure
Continuously Reinforced Concrete (CRC), invented in the United-States in 1921, has been developing in France since 1983, in the following contexts: - New constructions (50 km of motorway) The structures chosen are alternately: CRC + lean concrete CRC + bituminous concrete + stabilized capping layer - Strengthening of...