A recycling concept has been used since 1991 for reconstructing 120 km of carriageway on the concrete motorway Salzburg - Vienna: The old concrete is crushed and the coarse material used as the aggregate for the new concrete pavement. The fine fraction is added to the old granular subbase thus...
Use of Superplasticized Fiber Reinforced Concrete in the Construction of Pavements
Fibre Reinforced Concrete (FRC) by itself has opened up a new era in the field of Civil Engineering. FRC has given altogether a new dimension to concrete technology. It is even difficult to imagine that just the addition of fibres into concrete mass can change the entire properties of concrete....
Suitability of Superplasticized Recycled Aggregate Concrete in Road Construction
Piubably, in the years to come, the use of recycled aggregates in concrete may become the need of the day. This is becasue of the nonavailability of natural aggregates in some urban areas. Also, the enviromental laws may force for the closing down of aggregate plants. Apart from this, in...
Fibrous Ferrocement – An Ideal Material for Bridge Overlays
The overlays of highway bridges are usually subjected to stresses like impact stresses, longitudinal stresses, due to the application of brakes and wear and tear stresses. The moving loads on bridges have a jumping action due to uneven surface on which they move. This jumping causes shocks and vibrations of...
Rollcrete Bas – CBGB for the Tag Motorway in Turkey
Rollcrete Base - also called Cement-sound Granular Base (CBGB) - is basically a dry material bound by Portland cement, placed using an adapted asphalt paver, and vibrated externally. One of the first applications of rolicrete for the Trans European Motorway project was on the Tarsus - Adana - Gaziantep (TAG)...
A Contribution to Concrete Pavement Analysis
The concrete pavement structure consisting of the M40 concrete slab 160 to 240 mm in thickness and the cement-stabilized base course (CSB) 150 to 250 mm in thickness, is analyzed in the paper. The pavement slab is not reinforced and the spacing between expansion joints was selected in such a...
A Geotechnical Methodology for Roller Compacted Concrete Mixture Design
This paper presents a concise mix design process using a geotechnical approach to produce RCC mixtures for mass and structural applications. Laboratory compaction tests, using a Kango hammer, were performed on specimens with a predetermined combination of aggregates and cernentious materials, varying the amount of water. 1 he test results...
Effect of Geotextile to Improve the Weak Subgrade Soil
The concept of reinforcing pavements and of reinforced earth for improving the bearing capacity of insitu soils both under static and dynamic loading has gained popularity in receriL The word geotextile is now accepted by all civil Engineers to describe the textile used for improving the behavioural (structural) and functional...
The State of Temperature and Shrinkage Stress in CRCP in Curve Areas
In the literature of speciality there are studies about the calculus and behavior of continuously reinforced concrete pavements for alignment areas. In our paper we present some aspects of temperature variation and shrinkage stress in curve areas, taking also into account friction, which is determined experimentally in the laboratory. The...
Dynamics of the Roads Evaluation of the Forces Transmitted from a Vehicle to the Road Under Different Loading Conditions
A simplified viscose elastic model is proposed which is able to simulate the dynamic interactions between a vehicle and the rigid pavement under different loading conditions (constant and linearly variable in time). The deformations are correlated to the length of the mobile loads and to the characteristics of the vehicle....
Technical Conditions for Completely Using the Advantages of Concrete Pavements
It is immanent for concrete pavements not to get plastic deformations and therefore concrete pavements are especially suitable for heavy traffic roads. However, pavement performance depends from avoiding of some structural faults.
Numerical Investigation on Deformations and Stresses in Concrete Highway Pavements
In this paper, results of numerical simulations of the deformation behaviour of concrete highway pavements under hygral and thermal gradients are presented. It is shown that.high temperature gradients, which could be caused by a temperature shock may lead to thermal cracking at the surface of the concrete. Further shrinkage cracking...