The Authors present the results of an experimental investigation which was carried out on cold-recycled bituminous mixtures produced by a prototype plant. The objective of the study was to evaluate the short-term behaviour of the recycled mixtures from a mechanical, volumetric and environmental point of view. During production and laying the mixture was sampled for the assessment of its potential volumetric and mechanical properties according to previously developed experimental procedures. Compaction of cylindrical samples was carried out by means of an innovative portable static system; void content and indirect tensile strength at 20°C were thereafter measured in the laboratory. Mechanical testing was performed on the test site by making use of the Light Weight Drop Tester (LWDT) at various curing times in order to quantify the short-term development of stiffness. Such an information is essential in practice since it may originate constraints for the opening to traffic and for the overlay of the pavement with a wearing course. Curing effects were observed and after a sufficient time had elapsed cores were taken from the compacted layers for the evaluation of percent compaction and elastic stiffness. Finally, the potential environmental effects of the specific paving work were assessed by determining the pH and binder content of water expelled from specimens compacted on site and by instrumenting the foundation with appropriate syntherized bronze filters.

Short-term field assessment of cold-recycled bituminous mixture / Santagata, Ezio; Chiappinelli, Giuseppe. - (2006). ((Intervento presentato al convegno CONGRES MONDIAL DE L'EMULSION 2006 tenutosi a Lyon nel 3-6 October, 2006.

Short-term field assessment of cold-recycled bituminous mixture

SANTAGATA, Ezio;CHIAPPINELLI, GIUSEPPE
2006

Abstract

The Authors present the results of an experimental investigation which was carried out on cold-recycled bituminous mixtures produced by a prototype plant. The objective of the study was to evaluate the short-term behaviour of the recycled mixtures from a mechanical, volumetric and environmental point of view. During production and laying the mixture was sampled for the assessment of its potential volumetric and mechanical properties according to previously developed experimental procedures. Compaction of cylindrical samples was carried out by means of an innovative portable static system; void content and indirect tensile strength at 20°C were thereafter measured in the laboratory. Mechanical testing was performed on the test site by making use of the Light Weight Drop Tester (LWDT) at various curing times in order to quantify the short-term development of stiffness. Such an information is essential in practice since it may originate constraints for the opening to traffic and for the overlay of the pavement with a wearing course. Curing effects were observed and after a sufficient time had elapsed cores were taken from the compacted layers for the evaluation of percent compaction and elastic stiffness. Finally, the potential environmental effects of the specific paving work were assessed by determining the pH and binder content of water expelled from specimens compacted on site and by instrumenting the foundation with appropriate syntherized bronze filters.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/1523870
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