Forum discussion
NC-2009 MRc4: Recycled Content
I have my cement tracker all filled out. And I am still confused by it.
Do I use the dollar value of the cementitious materials multiplied by the mass of the totaled cementitious materials as my cost of material? Instead of the actual cost of the concrete mix delivered to the site?
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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?
Nadav Malin
CEOBuildingGreen, Inc.
LEEDuser Expert
844 thumbs up
January 18, 2017 - 8:43 am
Hi Shawn,
It's been a while since I've dealt with this, but my understanding is that you can do it either way. You can calculate your recycled content credit either for the entire mix together, or you can break out the cementitious materials and account for their mass and dollar value separately from the rest of the mix. (That's assuming you can get a dollar value for just the cementitious materials from your concrete batch plant.)
If you're using significant quantitites of fly ash or other recycled-content cement substitute it's usually better to break out the cementitious materials separately, because you don't get much credit for them if you just factor their relatively small mass in as part of the entire mix.I hope this helps!