cementing in steel ballast

Discussion in 'Metal Boat Building' started by John Dickie, Apr 16, 2019.

  1. John Dickie
    Joined: Apr 2019
    Posts: 33
    Likes: 4, Points: 8
    Location: South Africa

    John Dickie Junior Member

    the Departure 35 plans have the ballast as steel and concrete.According to T Colvin's book,you just clean the steel,give it a portland cement wash,then add your steel/concrete and smooth off the top surface.Is this still the way to do it?Also, I would like to cement wash a void space in the aft end of the keel before closing it up.I read the posts about pozzolans and can use them if need be.
  2. M&M Ovenden
    Joined: Jan 2006
    Posts: 365
    Likes: 80, Points: 38, Legacy Rep: 527
    Location: Ottawa

    M&M Ovenden Senior Member

    Hi John,

    On our dead wood area we just welded it shut. We also have a plate welded on top of our ballast to seal it up. I think welding a plate above your cement ballast would avoid any chance the water could find it's way down in a crank or void. T.C's book is excellent, but some sections are a bit dated (coatings).

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