Forum discussion
NC-2009 MRc4: Recycled Content
Hej! Do ready made concrete elements that are delivered on site count as assembly while in concrete that is cast on site the concrete and steel are two materials? Thanks!
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The recycled content percentage on the product data sheet is given as a range. What should I do?
Is the default average recycled content value of 25% for steel still allowed?
Can site materials, such as soil, be included in the MR credit calculations?
Are there recycled content claims that I should be wary of?
RETIRED
LEEDuser Expert
623 thumbs up
August 15, 2013 - 6:32 pm
Juliane - IMO: Assembly location in the precast plant - not the project site. You need to dig into the concrete mix design to break down Portland cement, supplementary cementitious materials (SCMs), aggregate, etc. to get to the raw materials and any recycled content. See the LEED Reference Guide for special calculations for SCMs.
Lise Dannesboe
COWI86 thumbs up
August 16, 2013 - 2:37 am
Hej Michelle, many thanks- I am aware, that I can calculate the SCM recycled content in that way- question is more if I am allowed to calculate the steel in the ready-made-concrete-element in a similar way or if this has to be by weight on the whole element. My question is if i can calculate concrete separate from the steel.
RETIRED
LEEDuser Expert
623 thumbs up
August 16, 2013 - 10:15 am
Juliane - Thanks for clarifying your question. Typically I would utilize the information in the Reference Guide for calculating assemblies. Though on this LEED-NC v2.2 job for precast concrete, the advice for steel might be what you are looking for: http://www.leeduser.com/credit/NC-v2.2/MRc4?all-comments=true#comment-14196.