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THE SPECIFIC WINTER BEHAVIOUR OF POROUS ASPHALT - THE SITUATION AS IT STANDS IN FRANCE

Jean Livet

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Abstract

For eight years new kinds of road surfaces have been developed in France: very thin bituminous concrete, ultra-thin bituminous concrete, and porous asphalts. The latter materials have very different winter behaviour than do the first two ones. Global examination of behaviour of pavements is needed, specifically: a semi-theoretical analysis of the thermohydric mechanisms involved; a comparative and experimental study between the porous asphalts and the dense bituminous concretes; and a strategic reflection to improve the winter serviceability of the porous asphalts.

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What this paper is about

For eight years new kinds of road surfaces have been developed in France: very thin bituminous concrete, ultra-thin bituminous concrete, and porous asphalts. The latter materials have very different winter behaviour than do the first two ones. Global examination of behaviour of pavements is needed, specifically: a semi-theoretical analysis of the thermohydric mechanisms involved; a comparative and experimental study between the porous asphalts and the dense bituminous concretes; and a strategic reflection to improve the winter serviceability of the porous asphalts.

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Available abstract

For eight years new kinds of road surfaces have been developed in France: very thin bituminous concrete, ultra-thin bituminous concrete, and porous asphalts. The latter materials have very different winter behaviour than do the first two ones. Global examination of behaviour of pavements is needed, specifically: a semi-theoretical analysis of the thermohydric mechanisms involved; a comparative and experimental study between the porous asphalts and the dense bituminous concretes; and a strategic reflection to improve the winter serviceability of the porous asphalts.

Key concepts: Asphalt, Serviceability (structure), Porosity, Geotechnical engineering, Materials science, Forensic engineering, Composite material, Geology

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