Some Physical Properties of Roller Compacted Concretes Used in Road Pavement Applications

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Some physical test results available in the literature on Roller Compacted Concrete (RCC) were evaluated. Most of the physical properties of RCCs such as drying shrinkage, frost resistance, abrasion, and fatigue are similar to those of conventional concrete with the same water-cement ratio. Since RCC is a zero slump concrete...

Manufacture and Use of Precast Elements for the Construction of Traffic Calming Devices

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In recent years, the proliferation of safety devices, the absence of legislation in the matter and the problems encountered in terms of the stability, efficiency and durability of these devices have resulted in the experimental manufacture of precast elements for the construction of road humps and plateaus. At the current...

Concrete Pavements on Bridges and in Tunnels

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In Austria, concrete pavement construction has a tradition of several decades and the technology used is regarded as mature. Nonetheless, improvements are required on a continuous basis. The sharp increase in heavy traffic, higher emission levels, including in particular noise emissions, as well as economic considerations taking into account the...

Concrete Roundabouts

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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...

Concrete By-Passes

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Concrete pavements have been used in Germany mainly for federal motorways, airfields and industrial areas and less for state and provincial roads. By-passes have been constructed with asphalt pavements. In 2001/ 2002 a by-pass in the course of a federal trunk road was constructed with a concrete pavement for the...

Surface Platforms For Public Transport New Perspectives: the Case of Cement Concrete

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As a result of Urban Travel Plans implemented in major cities, public transport is being favoured as a convenient means of travel and mobility by all. Platforms (road- and trackbeds) designed for public transport must offer quality from the technical standpoint in order to handle channelled loads or the insertion...

Guidelines For Concrete Roundabouts the Dutch Practice

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Continuously reinforced concrete pavement (CRCP) structures are becoming more popular for roundabouts due to the durable and sustainable character of this pavement type. This led to a need for practical guidelines, recommendations and standardisation with respect to design, details and the preparation of tender documents. The paper summarises a recent...

Flexural Stress Analysis of Rigid Pavements Using Nisa

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Design of pavements involves a study of paving materials their behavior under loads, climatic conditions & the under lying sub grade reaction. For the present study an attempt has been made to propose an alternative method of design of rigid pavements using NISA package. 2-D plane strain and axisymmetric solid...

Frost Damage Prevention of Concrete Pavement

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Due to severe frost damage at the main platform on a military transportation airfield in the Netherlands, investigations have been carried out to find the course of this damage. Tests have been carried out to compare the frost sensitivity of Portland cement and Fly-ash cement. Also the influence of several...

The Use of Statistical Experimental Design to Investigate the Autoclave Curing and Standard Curing of Cement

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28 day compressive strength of Portland cement mortar was investigated for standard curing and for autoclave curing. The effects of %C3S, %SO3 and Blaine on strength development in both curing methods are compared via the use of statistical experimental design techniques. Box-Behnken response surface methodology was adopted to create a...

Remarkable Belgian Projects Using Coloured Exposed Aggregate Concrete Surfaces

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The use of coloured exposed aggregate concrete in public spaces has made considerable progress in Belgium. As such, urban planners have become aware of the architectural value of this technique. The variety of shapes, colours and textures combined with the well-known advantages of concrete such as resistance and durability explain...

The Usage of Concrete Barriers for Modern Road Design and Efficient Construction Site Management in Europe

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Safety barriers are an essential device on roads, especially on highways. The European Standard EN 1317 defines the requirements of different safety levels that safety barriers have to comply with. Precast concrete and slipformed/cast-in-situ barriers are very successfully used as permanent barrier. Additionally precast barriers are a perfect solution for...