INVESTIGATING CRUMB RUBBER AMENDMENTS FOR EXTENSIVE GREEN ROOF SUBSTRATES

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dc.contributor.advisorLea-Cox, John Den_US
dc.contributor.advisorRistvey, Andrew Gen_US
dc.contributor.authorSolano Torres, Sonia Lorellyen_US
dc.contributor.departmentPlant Science and Landscape Architecture (PSLA)en_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2010-10-07T05:43:18Z
dc.date.available2010-10-07T05:43:18Z
dc.date.issued2010en_US
dc.description.abstractExtensive green roof systems can mitigate urban stormwater by capturing rainfall and reducing runoff volume. Green roof substrates, often made from expanded shales, slates and clays are fundamental for roof hydraulic dynamics, and for providing optimal plant growth conditions. However, these substrates occasionally impose load limitations for retrofitting existing infrastructure. This research studied recycled-tire crumb rubber, as a light-weight material for amending green roof substrates. Zinc release from crumb rubber was quantified, and the interactions with commercial rooflite® substrate and the effect of high Zn concentrations on the growth and uptake by Sedum were studied. Zn was found to leach from crumb rubber in quantities that could negatively affect plant growth; however, Zn was adsorbed onto cation exchange sites of the mineral and/or organic portion of rooflite®, preventing negative growth effects in Sedum. Crumb rubber could be utilized as an amendment with substrates having high cation exchange capacities.en_US
dc.identifier.urihttp://hdl.handle.net/1903/10813
dc.subject.pqcontrolledAgriculture, Horticultureen_US
dc.subject.pqcontrolledEnvironmental Sciencesen_US
dc.subject.pqcontrolledEngineering, Civilen_US
dc.subject.pquncontrolledcrumb rubberen_US
dc.subject.pquncontrolledgreen roofsen_US
dc.subject.pquncontrolledlow impact developmenten_US
dc.subject.pquncontrolledsedumen_US
dc.subject.pquncontrolledtoxicityen_US
dc.subject.pquncontrolledzincen_US
dc.titleINVESTIGATING CRUMB RUBBER AMENDMENTS FOR EXTENSIVE GREEN ROOF SUBSTRATESen_US
dc.typeThesisen_US

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