1. Articles from Ryan Henkensiefken

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    1. Supplemental cementitious materials (SCMs) and concrete -Continuing the discussion

      Explore Concrete Green Building Blog (Feb 14 2012) Concrete

      After receiving a few questions regarding my last blog post, “Fly Ash and Sustainable Concrete,” I determined a review of the different types of supplemental cementitious materials (SCMs) would be a good idea.  However, getting half-way though writing the post, I realized, without a basic understanding of cement, it’s hard to understand why we would want to replace it. That in mind, let’s start with the basics of cement, and cement hydration, and then go into a series of posts where I will discuss briefly the different cementing materials used in concrete, and the benefits and drawbacks of ...

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    2. Fly Ash and Sustainable Concrete

      Explore Concrete Green Building Blog (Nov 29 2011)

      Comment "Cost, durability performance (long term) and sustainability of cement and construction industry, yes, these are the major reasons why PFA ..." - jdbapat

      Fly Ash and Sustainable Concrete   If you’re trying to gauge industry interest in green concrete technology, you actually don’t have to go farther than LinkedIn®. It didn’t take long to find a discussion on the American Concrete Institute’s® page entitled “Difficulties attaining compressive strength using fly ash in concrete mix when 28-day strength is specified?”.  There were a number of interesting contributions made to this discussion that could explain why the 28-day strengths were not achieved, but to take a more holistic approach, let’s look at the three primary reasons why fly ash is used in concrete: for reduced costs ... (Read Full Article)

    3. Sustainable concrete design in the green revolution: Producer's Perspective

      Explore Concrete Green Building Blog (Sep 1 2011) green concrete

      Sustainable concrete design in the green revolution: Producer's Perspective More owners and major developers are insisting on sustainable building designs and construction practices. This is a major reason why the sustainable market is one of the fastest growing segments in the construction industry. Fortunately, many technologies exist today to meet this demand; however, the major hindrance in today's construction environment lies in the lack of flexibility in design codes and specifications. Many specifications limit the concrete producer’s ability to achieve a truly sustainable concrete by prescribing mixture proportions rather than setting performance criteria. In the past, there has been a push in the industry to move from ... (Read Full Article)

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