Nano-scale hydrogen-bond network improves the durability of greener cements

Johan Jacobsen, Michelle Santos Rodrigues, Mark T. F. Telling, Antonio Ludovico Beraldo, Sergio Francisco Santos, Laurence P. Aldridge, Heloise Bordallo

    Research output: Contribution to journalArticlepeer-review

    35 Citations (SciVal)

    Abstract

    More than ever before, the world's increasing need for new infrastructure demands the construction of efficient, sustainable and durable buildings, requiring minimal climate-changing gas-generation in their production. Maintenance-free "greener" building materials made from blended cements have advantages over ordinary Portland cements, as they are cheaper, generate less carbon dioxide and are more durable. The key for the improved performance of blends (which substitute fine amorphous silicates for cement) is related to their resistance to water penetration. The mechanism of this water resistance is of great environmental and economical impact but is not yet understood due to the complexity of the cement's hydration reactions. Using neutron spectroscopy, we studied a blend where cement was replaced by ash from sugar cane residuals originating from agricultural waste. Our findings demonstrate that the development of a distinctive hydrogen bond network at the nano-scale is the key to the performance of these greener materials.
    Original languageEnglish
    Article number2667
    JournalScientific Reports
    Volume3
    DOIs
    Publication statusPublished - 2013

    Subject classification (UKÄ)

    • Natural Sciences
    • Physical Sciences

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