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  1. 4th March 2008, 09:10 PM #1
    Rob Mey
    Rob Mey is offline New Member
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    Default Water proofing block retaining wall

    Hi All

    My problem is a besser block retaining wall that also forms part of a new extension wall. I'm trying to water proof the wall with bitumen paint but the directions say the surfaces need to be dry and clean. At the moment with all the rain we've had and the fact that the sun never hits the bottom of the wall, this area that I'm trying to water proof remains constantly damp or wet. Are there any products out there for water proofing that can be applied to wet concrete surfaces?

    Cheers

    Rob
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  3. 4th March 2008, 11:03 PM #2
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    autogenous
    autogenous is offline Senior Member
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    Default

    Do you have a picture?

    The bitumen wont really adhere to the wet surface.

    The only thing I can suggest is try a mix of hydrocrete and neat cement on the wet area.

    Once that dries you should be able to bitcote it. Do more than coat at the base. Be sure to go back on the footing as capillary action will drag moisture back into the wall.

    If the wall is critical in damping especially if there is drainage aggregate behind it you may look at GeoMat in case any of the drainage aggregate or other aggregate doesn't damage the protective bitcote coating.
    c2=a2+b2;
    When buildings made with lime are subjected to small movements thay are more likely to develop many fine cracks than the individual large cracks which occur in stiffer cement-bound buildings. Water penetration can dissolve the 'free' lime and transport it. As the water evaporates, this lime is deposited and begins to heal the cracks. This process is called autogenous healing.
  4. 6th March 2008, 01:35 PM #3
    Rob Mey
    Rob Mey is offline New Member
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    Thanks for the reply. I have attached a picture (I think) which was taken from the top of the wall (2.4 m high) you can see the water below. If the image isn't right tell me and I'll try again. There is black plastic over the wall

    Rob





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