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Recent content by khoward

  1. khoward

    Aluminum in contact with concrete

    We have several aluminum slide gate frames in a municpal wastewater treatment facility that appear to be oxidizing and spalling the concrete channels. My question is there any way to passivate the aluminum guides that are cast into the concrete to stop the spalling of concrete or do we have to...
  2. khoward

    Coatings for sulfide damaged concrete

    We have several covered concrete channels where H2S has attacked the concrete. The problem is that we can only turn off flow to these channels for 8 hours for surface prep and coating. We cannot fully dry out the concrete prior to application of the coating. Does anyone have experience with...

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