Padstone cast in place concrete mix

I suppose the other thing to consider and this seems like a major one to me. If you pour your own Padstone it will take a few weeks to reach full compressive strength. If you buy off the shelf then this will be ready to use as it is.
 
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My architect replied and simply said "3:1 mix would be OK"!

Think I will use that premixed bagged stuff. Which does seem to have smaller stones in it... I would have thought latlrger stones are stronger.
 
smaller aggregate will make stronger concrete generally I thought
 
an203888 said:
My architect replied and simply said "3:1 mix would be OK"!

Think I will use that premixed bagged stuff. Which does seem to have smaller stones in it... I would have thought latlrger stones are stronger.
Click to expand...

Back to my comments from an earlier post - has the architect provided calcs, specs, etc beyond what is on your plans?

I'd want all this stuff in writing from him...
 
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an203888 said:
3:1 using ballast/all in
Click to expand...
LOL. So you know the ballast ratio that the mini digger scooped up at the merchants?

The point is, not only are architects clueless about specifying padstones, but no-one specifies a concrete mix as "3:1". You've hit the jackpot there.

I hope your concoction copes with the bearing shear, which is down to a bit more than vibrating the shutter with a drill

BTW, you may need a C40 designed mix, and its not just about sand/cement/gravel, as water plays a massive part in the 28 day set strength
 
^woody^ said:
LOL. So you know the ballast ratio that the mini digger scooped up at the merchants?

The point is, not only are architects clueless about specifying padstones, but no-one specifies a concrete mix as "3:1". You've hit the jackpot there.

I hope your concoction copes with the bearing shear, which is down to a bit more than vibrating the shutter with a drill

BTW, you may need a C40 designed mix, and its not just about sand/cement/gravel, as water plays a massive part in the 28 day set strength
Click to expand...

I was going to use one of the C40 bag mixes. The architect has specified all the other structural parts so if he thinks that 3:1 is OK then it can't be that much of a load can it. Either that or he is really ****!
 
an203888 said:
I'm happy. Spoken to the architect, a builder and done my own research. I consider a cast Padstone in this situation to be better than the other options.
Click to expand...
We’re trying to help you here mate.

My point is that the BC - assuming you are doing the work legitimately - may want to see the documented calcs.

Your happiness will not be factored into whether or not BC sign-off. Sorry
 
Building control will look at a resemblance of a padstone and tick their form. It wont matter to them if the bearing shears or cracks later.

And will it be loaded before 28 days optimum setting time?
 
D

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