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Ultrasonic Tomography as Non Destructive Measuring Technique for Concrete Pavement Evaluation

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Ultrasonic tomography is a non-destructive method to evaluate different characteristics of the pavement such as thickness, position of reinforcement, presence of cracks and impurities, strength evolution. This technique can be used for control and follow-up of new pavements but also for non-destructive analysis of existing pavements in order to determine...

Optimal Pore Distribution of Porous Concrete Pavers Aggregate

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Concrete pavers are often used for construction of urban area roads as they offer both easy and fast construction as well as high aesthetical value. Although noise reduction is also very important in urban areas, research focusing on low noise concrete pavers is still rare. This paper illustrates a study...

Failures of Concrete Slit Drains Caused by Negative Effect of their Erroneous Integration Into Surrounding Multi-Layer Road Systems

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Concrete slit drains (also known as slot drains – see fig. 1,2) are being used for the draining of highways and roads, as well as for large handling and parking areas. Recently, this system of drainage has become increasingly applied, which does, however, bring with it an increased incidence of...

A 32-Year-Old CRCP only with a New Porous Asphalt Top Layer still Fit for the Future

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The A76 is the corridor between the Ruhr area (Germany) and Antwerp (Belgium) in the southern part of the Netherlands. It was built in 1985. Because the asphalt pavement failed as a result of a geological fault in the subsurface, a CRCP with a toplayer of porous asphalt was chosen....

A Dedicated Bus Platform in Castellón Spain

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The metropolitan area of the city of Castellón, situated East of Spain at the Mediterranean coast, has a network of dedicated bus platforms, which was conceived with two main purposes: to enhance public transport and to structure urban development. As a part of this network, a bus platform, 3.9 km...

A Framework for a New Protocol for Evaluating Concrete Curing Effectiveness

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Excessive early early-age concrete surface moisture evaporation can be a source of key issues in the paving of concrete pavemen t, such as plastic shrinkage cracking and spalling related delamination; the use of liquid membrane membrane-forming curing compounds is one of the most prevalent methods to protect hydrating concrete surfaces...

Recent Advances and Uses of Roller Compacted Concrete Pavements in the United States

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Roller Compacted Concrete (RCC) is a no slump concrete that is placed by an asphalt paver and compacted with vibratory rollers similar to asphalt pavement construction. RCC has long history of good performance as a pavement for ports, container yards, and manufacturing plants. This paper will summarize a recent survey...

Belgian Specifications for Freeze-Thaw-Resistant Pavement Concrete

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The Belgian standard specifications contain a number of clear requirements for the composition of concrete mixtures and the properties of fresh and hardened concrete. It is generally known that water and air content have a substantial impact on the frost susceptibility of a concrete surface – the former in a...

Precast and In-situ Concrete Barriers – the Complete Safety Solution for Roadsides

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The technology of in-situ concrete safety barriers has not really changed in the last two centuries. After an extensive development and crash-test program a new generation was created recently. This is a technical report on the right way to use in-situ concrete at today´s level of technology. In the central...

Fibremix Concrete for Pavements Experimental Search for Maximum Crack-Free Slab Length

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Road constructions with fibremix concrete allow longer distances between joints, compared to unreinforced concrete pavements. In the absence of a dedicated design tool for fibremix concrete pavements, the search for a maximum crack-free slab length took place in several projects. Fibremix concrete has been used in parking areas near motorways,...

Uncertainty Management in Comparative Life-Cycle Assessment of Pavements

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There is significant uncertainty and variation in the environmental life cycle assessment of pavements. Uncertainty and scenario variation should be sufficiently accounted in the comparative life cycle assessment in order to increase the confidence on decisions regarding the environmental implications of alternative pavement systems. In this paper we first present...

Experimental Short Continuously Reinforced Concrete Pavement Crack Pattern and Load Transfer Efficiency Across Cracks

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As a proposed long-term pavement solution for bus stops and corridors in highly urbanized areas, four experimental short continuously reinforced concrete pavement (CRCP) sections with different percentages of longitudinal steel were built in São Paulo, Brazil. The pavement sections are only 50 meters long each, a short constructive length in...