Paper andcardboard,madewithrecovered fibers obtainedbyrecycling,areanattractive,sustainablematerial. Recoveredpaperandcardboardaremainlyusedforpackagingpurposes,evenif,inrecentyears,variousresearchesfocusedonthepossibilitytodevelopnewproductsandproposedalternativeappli-cations.This paperpresentsnewdesignsofacousticabsorbersmadeofpartiallyrecycledcardboard,inorderto reducetheenvironmentalimpactofthematerialsusuallyusedfortheacousticcorrectiononindoorenvironments.Someofthesenewdesignedabsorbersareporousandmakeuseofthevisco-thermalabsorption effectsintheporespace.OtherabsorbersarebasedontheHelmholtzresonatorprinciple.Computer modelingsoftwarewasusedtopredicttheperformanceoftheabsorbers;inparticular,different optionsofcardboard-basedpanelsandpaperboardtubeswereinvestigatedtoidentifythesolutions withthebestacousticperformance.Areal-sizeprototypeofasandwichpanelwasthenex-perimentally characterizedinlaboratory.Theabsorptioncoefficient spectrumoftheprototypewasmeasured accordingtotheprocedureindicatedintheISO354standard.Theresultsshowthatthemeasured acousticabsorptioncoefficient ofthematerialmadeusingcardboardwashigherthantheoneof traditionalgypsumabsorbers,givinginparticularanincreaseoftheacousticabsorptionatmidandhigh frequenciesintheorderof40%.A LifeCycleAssessmentanalysiswasalsoperformedtoevaluatetheenvironmentaladvantagesofthese materials.Theenvironmentalimpactsoftheproductionofthecardboard-basedpanelwerecompared withtheimpactsofconventionalacousticmaterials.Theanalysishighlightedapotentialre-duction ofbothenergydemandandgreenhousegasemissionsduringtheproductionprocessofthecardboard-basedacousticmaterials.The estimatedCEDandGWPvaluesresult10%and34%respectivelylowerthantheimpactsofaconventionalgypsumboard.
Experimental and environmental analysis of new sound-absorbing and insulating elements in recycled cardboard
Asdrubali, Francesco;
2016-01-01
Abstract
Paper andcardboard,madewithrecovered fibers obtainedbyrecycling,areanattractive,sustainablematerial. Recoveredpaperandcardboardaremainlyusedforpackagingpurposes,evenif,inrecentyears,variousresearchesfocusedonthepossibilitytodevelopnewproductsandproposedalternativeappli-cations.This paperpresentsnewdesignsofacousticabsorbersmadeofpartiallyrecycledcardboard,inorderto reducetheenvironmentalimpactofthematerialsusuallyusedfortheacousticcorrectiononindoorenvironments.Someofthesenewdesignedabsorbersareporousandmakeuseofthevisco-thermalabsorption effectsintheporespace.OtherabsorbersarebasedontheHelmholtzresonatorprinciple.Computer modelingsoftwarewasusedtopredicttheperformanceoftheabsorbers;inparticular,different optionsofcardboard-basedpanelsandpaperboardtubeswereinvestigatedtoidentifythesolutions withthebestacousticperformance.Areal-sizeprototypeofasandwichpanelwasthenex-perimentally characterizedinlaboratory.Theabsorptioncoefficient spectrumoftheprototypewasmeasured accordingtotheprocedureindicatedintheISO354standard.Theresultsshowthatthemeasured acousticabsorptioncoefficient ofthematerialmadeusingcardboardwashigherthantheoneof traditionalgypsumabsorbers,givinginparticularanincreaseoftheacousticabsorptionatmidandhigh frequenciesintheorderof40%.A LifeCycleAssessmentanalysiswasalsoperformedtoevaluatetheenvironmentaladvantagesofthese materials.Theenvironmentalimpactsoftheproductionofthecardboard-basedpanelwerecompared withtheimpactsofconventionalacousticmaterials.Theanalysishighlightedapotentialre-duction ofbothenergydemandandgreenhousegasemissionsduringtheproductionprocessofthecardboard-basedacousticmaterials.The estimatedCEDandGWPvaluesresult10%and34%respectivelylowerthantheimpactsofaconventionalgypsumboard.| File | Dimensione | Formato | |
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