The increasing traffic flows on road infrastructures significantly quicken the degradation time of the pavements efficiency characteristics. As a consequence, the managing bodies are obliged to consider more frequent maintenance interventions, so as to guarantee high levels of both safety and comfort for users. Therefore, considering the wide extension of the Italian road infrastructures, one could easily imagine the large amount of milled materials (R.A.P.) coming from maintenance. Along with R.A.P., there is another waste material which is to be considered also: it is the so-called C&D, which basically belongs from the demolition of civil engineering structures. Both materials involve serious environmental considerations, the need of new landfills being compulsory. The re-use of these substances is the solution to this concern, and this reflects the current trend of finding alternative technologies for the use of waste materials. Actually, waste materials recycling, including R.A.P. and C&D is one of the most interesting technical innovations, both the economical and environmental aspects being considered at the same time. For this reason, this paper proposes the outcomes of an optimisation study on R.A.P. and R.A.P.+ C&D mixes for the manufacture of cement admixtures for road infrastructures, based on mechanical and economical evaluations.

Mix optimisation for cement mixtures made of R.A.P. and C&D

AGOSTINACCHIO, Michele;DIOMEDI, Maurizio
2005

Abstract

The increasing traffic flows on road infrastructures significantly quicken the degradation time of the pavements efficiency characteristics. As a consequence, the managing bodies are obliged to consider more frequent maintenance interventions, so as to guarantee high levels of both safety and comfort for users. Therefore, considering the wide extension of the Italian road infrastructures, one could easily imagine the large amount of milled materials (R.A.P.) coming from maintenance. Along with R.A.P., there is another waste material which is to be considered also: it is the so-called C&D, which basically belongs from the demolition of civil engineering structures. Both materials involve serious environmental considerations, the need of new landfills being compulsory. The re-use of these substances is the solution to this concern, and this reflects the current trend of finding alternative technologies for the use of waste materials. Actually, waste materials recycling, including R.A.P. and C&D is one of the most interesting technical innovations, both the economical and environmental aspects being considered at the same time. For this reason, this paper proposes the outcomes of an optimisation study on R.A.P. and R.A.P.+ C&D mixes for the manufacture of cement admixtures for road infrastructures, based on mechanical and economical evaluations.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11563/17572
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