Steel reinforcement products for concrete - The International EPD ...

OTHER INDICATORSUnit/tonneUpstreamprocessesTransports to thecore processCoreprocessesExternal steel scrap charged kg 1164 1164By-products (no allocation)Slags kg 152 152Zinc-containing dust kg 15.5 15.5Steel scrap kg 18.2 18.2Copper scrap kg 0.061 0.061Mill scales kg 15.5 15.5TotalWastesWaste for recycling kg 0.66 0.14 0.80Waste for incineration kg 0.26 0.35 0.61Deposited waste kg 1040 1040Hazardous waste kg 0.47 0.47Radioactive waste kg 0.010 0.010CATEGORIES OF IMPACTAcidificationa phenomenon whereby atmospheric precipitations have a lowerthan-normalpH value, which can cause damage to forests andcrops, and to aquatic ecosystems and manufactured items. It isdue to emissions of SO 2, NO xand NH 3, which are therefore includedin the Acidification Potential (AP) indicator, expressed asSO 2-eq.Ozone depletiondegradation of the stratospheric ozone layer, which blocks theultra-violet component of sunlight, by means of highly reactivecompounds originating from chlorofluorocarbons (CFCs) or chlorofluoromethanes(CFMs). The substance used as a reference forthe ODP (Ozone-Depletion Poten-tial) is trichlorofluoromethane,or CFC-11.Greenhouse effecta phenomenon whereby infra-red rays emitted by the earth’s surfacefollowing solar heating are absorbed by molecules present inthe atmosphere and reemitted in the form of heat, causing globalwarming of the atmosphere. The indicator used here is the GWP(Global Warming Potential), which covers emissions of carbon dioxide,the main greenhouse gas, and other gases with a higherdegree of infra-red absorption, such as methane (CH 4), nitrousgas (N 2O) and chlorofluorocarbons (CFCs), which are expressedas a function of the degree of absorption of CO 2(g CO 2).Eutrophicationthe enrichment of watercourses with nutrients, which causes imbalancesin aquatic ecosystems due to overdevelopment as theresult of a lack of nutritional limitations. Eutrophication Potential(EP) mainly covers phosphorous and nitrogen salts, and is expressedas PO 43-eq.Photochemical ozone creationthe production of compounds which, by the action of light, areable to promote an oxidation reaction that leads to the productionof ozone in the troposphere. The POCP (Photochemical OzoneCreation Potential) indicator mainly concerns VOCs (Volatile OrganicCompounds) and is expressed as equivalent weight of ethylene(g C 2H 4).Next generationswill bene fit fromtoday’s responsibleconsumptionCO 2countsCelsa Steel Service – EPD – DK8CelsaNordic_EDP_Danska.indd 8 2012-04-17 14:59:50