The problems connected with the bad surface characteristics of a road pavement have significant consequences on users safety, most of the times the car drivers being not always totally responsible for the car accidents caused. In case of sever rainfalls, splash, spray and aquaplaning phenomena due to poor surface conditions of the road infrastructure severely reduce visibility as well as the overall safety. These aspects have been successfully faced by porous asphalt and Stone Mastic Asphalt (SMA) pavements, while no remedies where found for concrete pavements from this standpoint. At the Laboratory of Roads Construction of the University of Basilicata (Potenza, Italy), special mix designs were studied in order to find out the best recipe for rigid pavements which could give good results from the point of view of both micro and macro texture, the overall draining performances being at the same time improved. After carefully selecting, amongst the others, the mix which better combined these aspects, several measurements on the skid resistance of the surface were taken by means of the British Pendulum and the sand height method. Hence, the results so found were compared to the outcomes belonging to a usual SMA pavement, the conclusions being impressive: as for the test above mentioned, the authors found that excellent surface characteristics were found, the initial gap existing from this point of view between flexible and rigid pavements being therefore almost filled. Furthermore, the draining performances of the porous concrete pavements were outstanding and the resulting permeability was similar to the corresponding value of typical draining and noise reducing bituminous pavements.

Skid resistance of porous concrete: an overall comparison with stone mastic asphalt pavements

AGOSTINACCHIO, Michele;
2004

Abstract

The problems connected with the bad surface characteristics of a road pavement have significant consequences on users safety, most of the times the car drivers being not always totally responsible for the car accidents caused. In case of sever rainfalls, splash, spray and aquaplaning phenomena due to poor surface conditions of the road infrastructure severely reduce visibility as well as the overall safety. These aspects have been successfully faced by porous asphalt and Stone Mastic Asphalt (SMA) pavements, while no remedies where found for concrete pavements from this standpoint. At the Laboratory of Roads Construction of the University of Basilicata (Potenza, Italy), special mix designs were studied in order to find out the best recipe for rigid pavements which could give good results from the point of view of both micro and macro texture, the overall draining performances being at the same time improved. After carefully selecting, amongst the others, the mix which better combined these aspects, several measurements on the skid resistance of the surface were taken by means of the British Pendulum and the sand height method. Hence, the results so found were compared to the outcomes belonging to a usual SMA pavement, the conclusions being impressive: as for the test above mentioned, the authors found that excellent surface characteristics were found, the initial gap existing from this point of view between flexible and rigid pavements being therefore almost filled. Furthermore, the draining performances of the porous concrete pavements were outstanding and the resulting permeability was similar to the corresponding value of typical draining and noise reducing bituminous pavements.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11563/10178
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