Reinforcing a poured concrete floor with Bamboo.

  1. awemawson Forum Supporter

    My workshop slab has the D P M over the polystyrene with no issue, but when we poured the footings for our kitchen extension the L A had insisted on two metre deep footings with Clay Block or some such stuff that was basically expanded polystyrene pegged to the side of the trench to absorb expansion and contraction. The whole flipping lot floated up and I used it as insulation under the floor slab!
     
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  2. mtt.tr

    mtt.tr Member

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    @Parm will confirm im an uniteresting fart that likes to read long winded documents.
     
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  3. DaveB Member

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    North London
    Interesting thread this....

    Rebar should not be rusty before concrete is placed, neither should it be contaminated with oil, paint, etc.

    Steel fibre concrete is not normally used with rebar, unless there are special details required at expansion joints. Typical dose rates are 15 to 40 kg per cubic meter of concrete.
    I would expect polyester fibre concrete to be used when you would not normally use structural reinforcement but need some crack control. Don't know the dosage rates.
    Polypropylene fibres are used for fire resistance, dose rates are often given in litres per cubic metre and if you've seen the raw fibre you'll know why.

    Bamboo in bulk form is probably too smooth to work like steel rebar.
    Bamboo broken down into splinters about 65mm long might be far more effective if you can stop it floating to th etop of the concrete, it would need to be a nice stick cohesive mix.
     
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  4. mtt.tr

    mtt.tr Member

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    Though polystyrene isnt anygood for point load but is brilliant at distributed loads and confirms to spread load

    Supports slabs as heave protection as im sure you are aware, and thats just hexagons
     
  5. barking mat

    barking mat Barking at Pigeons

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    So dpm on top of polystyrene?

    I just Google / binges dpm above or below insulation and get 300 conflicting opinions.
     
  6. mtt.tr

    mtt.tr Member

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  7. Mick Annick

    Mick Annick Member

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    My new workshop floor has two lots of DPM, one below the gravière and one above the polystyrene :dontknow:
     
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  8. barking mat

    barking mat Barking at Pigeons

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    Wow.

    That's a lot of insulation, minimum concrete and huge insurance claim.
     
  9. barking mat

    barking mat Barking at Pigeons

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    Belt and braces, like it.
     
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  10. barking mat

    barking mat Barking at Pigeons

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  11. barking mat

    barking mat Barking at Pigeons

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    And if polystyrene gets damp, the thermal bridge or rupture of, is lost.
     
  12. optima21 Forum Supporter

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    you mean Chinesium :D

    and the Chinese used to use mortar made from rice

    https://en.wikipedia.org/wiki/Sticky_rice_mortar
     
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  13. barking mat

    barking mat Barking at Pigeons

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  14. Pigeon_Droppings2 Forum Supporter

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    My missus makes rice from mortar sometimes! :laughing:
     
  15. mtt.tr

    mtt.tr Member

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    @barking mat

    With dpm location and

    Youll get differing personal opinions on location, personally i put it on top of well blinded over-site then insulation


    geo membranes i put down the crushed concrete ontop of the membrane as it stops the crushed mixing in with the soil
     
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  16. barking mat

    barking mat Barking at Pigeons

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    Yep, my thoughts too.
     
  17. mtt.tr

    mtt.tr Member

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  18. Parm

    Parm You can take a horse to water but ....

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    Probably read more useless stuff than I do, lol
     
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  19. Bryan Williams

    Bryan Williams Member

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    I chucked a load of overlapping. bike frames in when I laid my dads drive 30 years ago, nothings moved.
     
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  20. Bullet2012

    Bullet2012 Forum Supporter

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    Or use lemongrass, same effect but a much better aroma :scared:
     
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