Concrete Volume

[Fat Pat]

Do any of you fine folk know what VOLUME a 20 KG bag of pre-mixed concrete occupies?

I have a small project on the go, and part of it is to fill a hole in a concrete floor, and it has just occurred to me that I have no idea, and don't fancy making multiple return trips to the hardware store!

Additionally, if it is going into the ground, what would you recommend as a suitable waterproofing agent to be mixed into the concrete?

I haven't made a new post before, so this is all very exciting!

[bitingmidge]

Congratulations on losing your thread-virginity!!

I just happen to have a couple of bags lying around (ready to weigh down my next super-light experimental bench structure I guess ), and in the fine print it says:

10 kg of this product spreads to 320 x 320 (0.10 square metres) to a depth of 50mm.

I'd be guessing that you could get a 20kg bag to stretch to 100mm deep, which means .10 sq metres x .1m = .01 cubic metres.

Double check by running a tape over the bag and multiplying depth x height x width. If the answer is close you'll know it's correct!

Cheers,

P

[Daddles]

Pat, I've used premix many times over the years and can tell you this as gospel - the amount you need will either be half what you mixed or twice what you mixed. Don't try to second guess it before hand because the job will warp itself to satisfy this immutable law of nature.

Richard

[simon c]

I don't know about pre-mixed, but for mixing up 1000 litres of 4.2.1 you need 1800kg agg & 350 cement & 200kg water. So dry weight of 2150kg. If you have 20 kg, it would give you 10 litres of compacted wet concrete. So I agree with midge.

But it will say on the side of the bag.

If it is quick set concrete, then it may be different as quickset has a lot more cement and therefore needs proportionately more water.

Simon

[ozwinner]

If it is quick set concrete, then it may be different as quickset has a lot more cement and therefore needs proportionately more water.

Simon

I thought they left out the gypsum to make cement set quicker??


Al :confused:

[Daddles]

I thought they left out the gypsum to make cement set quicker??


Al :confused:

Ah ha. Once again, we have the Official Thread Hijacker giving a serious reply to a thread. :eek: Is this a developing trend? :confused: Is this hallowed position in danger of being brought into disrepute? :eek:

Oh Al, Al. Please return to the path of light and illogical reason

Is there a pancake recipe involving premix? I dated a lady who seemed to think so - some of her pancakes still form part of an artificial reef off Glenelg :eek:

Cheers
Richard

[ozwinner]

Sorry.

[bitingmidge]

Been laying bricks again haven't you Al??

Sorry

P

[Rusty]

If I may presume...quite obviously, if there is not enough volume, you won't be able to hear the concrete.

Doesn't that feel better, now?

[ozwinner]

Been laying bricks again haven't you Al??

Sorry

P

I have.
I think Im addicted.
Pass me another brick man.....

Ohhh, thats soooo much better.

Al

[Daddles]

Oh gawd, I don't know who's sicker. You lot or me for joining in.

Richard

[Cliff Rogers]

Tall and tan and young and lovely, The girl from Ipanema goes walking, And when she passes
each one she passes goes "a-a-ah!"
When she walks she's like a samba that, Swings so cool and sways so gentle, That when she passes
each one she passes goes "a-a-ah!"
Oh, but I watch her so sadly, How can I tell her I love her? Yes, I would give my heart gladly
But each day when she walks to the sea, She looks straight ahead not at me
Tall and tan and young and lovely, The girl from Ipanema goes walking, And when she passes
I smile, but she doesn't see, She just doesn't see, No she doesn't see....

"a-a-ah!"

If you want the cords, they are here....
http://www.bossanovaguitar.com/anton...m_ipanema.html

[Iain]

:confused: :confused: :confused:
Smoking those funny cones again?
Sounds a bit like the green horse story.

[Fat Pat]

I feel blessed....my first NEW post and it has been high-jacked. I sort of guessed that pancakes would make an appearance though, but skimpy little bikinis on South American beaches weren't expected

Keep it coming fellas, beats the alternatives of the political blogs I scan by miles!

Anyway, no-one felt the need to furnish info about waterproofing my concrete. Is "BondCrete" the go, or is there some other goop that will work?

Let me know, then highjack away.

[Cliff Rogers]

[QUOTE=Fat Pat]...Anyway, no-one felt the need to furnish info about waterproofing my concrete. Is "BondCrete" the go, or is there some other goop that will work?....QUOTE]

BondCrete is for making new concrete stick to old concrete as far as I know.
What do you want to waterproof it for? Is there water under the slab(?) that you a filling the hole in?
There are a multitude of goops that can be used as a moisture barrier.
If it's under some other sort of flooring, timber, lino, etc, you can use plastic sheeting.
If it is to be a bare concrete floor, there are some sealers that are meant for sealing masonary/tile floor so they don't stain & they will work too.
Then there is/are a variety of 2 pack products that will give you a hard, wear resistent coating. I don't have any names so I can't help you.

In another thread, Midge mentioned a specialy painted workshop(?) floor....
http://www.woodworkforums.ubeaut.com...d.php?p=123502

maybe he can help.