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Building a Wall in a Stream - Mortar Mix

Discussion in 'Building' started by Jeremy13, 3 Mar 2013.

  1. Jeremy13

    Jeremy13

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    Need to build a 1.5 metre wide 75cm tall brick wall in a gently flowing stream. Can I use a standard 3:1 sand cement mix for this and allow it to set slowly under water? I was thinking of erecting a board on the downstream side for a few days to support the wall (which would be 3 or 4 bricks wide, not single brick) and stop wash-out.

    Could one of you experts out there please advise. Tx.
     
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  3. noseall

    noseall

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    You will either need to pile the foundations or channel the water away from the build area via shuttering etc, whilst you build or you will end up with a stream full of cement, sand and rubble.
     
  4. Hugh Jaleak

    Hugh Jaleak

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    And if the stream doubles as the local storm drain then either check the weather forecast beforehand, get a mountain of sandbags or hire a rather large pump.....
     
  5. ^woody^

    ^woody^

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    Google cofferdam. You'll need one
     
  6. Jeremy13

    Jeremy13

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    Doesn't sound too good so far.

    This is not Crossrail or the new Thames new container port, just a small pond construction in the countryside. Thanks for the replies - my simple Plan A probably won't work. I've come across Parex aquatic mortar on the web, otherwise is there a Plan B that does not involve huge expense and heavy plant?
     
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  8. noseall

    noseall

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    Cement based mortar will set underwater no probs. Your problem is actually working underwater and where that water is moving.
     
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  9. Graeme1983

    Graeme1983

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    Jeremy, have a look into Lime mortars.

    Im using lime(non hydraulic) for an old house reconstruction as its much better then cement in a lot of ways.

    Ive only found out what I need to know on it for my purposes of rendering, plastering and possibly flooring but Ive seen that Natural Hydraulic Lime (NHL) sets underwater, indeed this is what the Romans used on their aqueducts and sewers.

    http://www.lime-mortars.co.uk/lime/natural-hydraulic-lime/singleton-birch/NHL3.5/25kg
     
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  10. Jeremy13

    Jeremy13

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    Thanks for that Graeme.

    Briefly saw the follow up to the deleted post and in fact that was a valid point, albeit very stupidly put. Even for a very small stream, the Environment Agency may apparently be concerned about any interference with water flow and water quality so I may revise the design of this project and do away with the brick wall. Once again, over-regulation and red tape risk blocking British innovation and holding up business success...
     
  11. noseall

    noseall

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    In your case it may ENCOURAGE innovation.
     
  12. Graeme1983

    Graeme1983

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    What is it your trying to do? Little bit of hydro power like they do in Austria and Norway?
     
  13. DIYnot Local

    DIYnot Local

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