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Re: Green Point Rated Concrete

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James or anyone else, can you provide some more links to articles about HVFA or hi slag concrete mix designs? It comes up now on nearly every new building I work on and I should know that as it seems I'm going to skip taking the LEED exam....


On Sun, Mar 15, 2009 at 5:21 AM, James Getaz <jamesgetaz3(--nospam--at)> wrote:
      You're right about reflectance. We are putting parking deck up right now that has slag in the roof double tees for increased albedo. There was an article about it in Concrete International about months ago. Slag concrete changes color noticeably. It has a greenish cast for a few days after it's poured, and every form joint is noticeable. Then it gets lighter and the variation in color disappears. I'm told it lightens most from exposure to sun. I do not know anything about the chemistry to explain any of it, and I'm not at work, so cannot give the CI reference.
   Jim Getaz
   Precast Concrete Engineer