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Busted edge of suspended slab over patio

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  1. #1
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    Default Busted edge of suspended slab over patio

    How do I go about fixing this? The lower edge of the slab edge is busted, it's probably about 300 mm along the edge length.
    Attached Thumbnails Attached Thumbnails dsc_0159-medium-.jpg   dsc_0160-medium-.jpg  

  2. #2
    Community Moderator phild01's Avatar
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    I would be using a magnesium phosphate non shrink grout and some patient forming it up to pour it into.

  3. #3
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    Quote Originally Posted by phild01 View Post
    I would be using a magnesium phosphate non shrink grout and some patient forming it up to pour it into.
    Sorry I've not use any sort of concrete grout before, is that a common thing ? Is it something you can get from the green shed?.

  4. #4
    4K Club Member Marc's Avatar
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    Craka ... can you tell why this happened? Is there a steel bit you can see rusting inside the cavity?
    Enjoy present pleasures in such a way as not to injure future ones.
    Seneca

  5. #5
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    Quote Originally Posted by Marc View Post
    Craka ... can you tell why this happened? Is there a steel bit you can see rusting inside the cavity?
    There is about a half inch of reo bar I can see. A few years ago I managed to, but not meaning to, knock the concrete edge with the back of an axe.

  6. #6
    Community Moderator phild01's Avatar
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    Quote Originally Posted by craka View Post
    Sorry I've not use any sort of concrete grout before, is that a common thing ? Is it something you can get from the green shed?.
    A product I have used but can no longer find was Blue Circle Rapid Patch Concrete.
    I suspect Boral Concrete Rapid Patch is the same product.
    https://www.bcsands.com.au/index.php...ucts_id=151111

    These products don't seem to be as available as they once were. I would choose the magnesium phosphate products over other epoxy type patching products.

  7. #7
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    Could I use
    Lanko 5kg 136 Rapid Patching Mortar?

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