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PostPosted: Wed Apr 05, 2017 9:12 pm 
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Evening folks!

I'm building quite a large 16x9 ft shed in the garden from a wood panel section kit

The soil has been dug out by hand about 4 inches so far, my plan was for 4 inches of sub base then 3 inches concrete.

What is the sub base best made of my friend says ballast I'm not sure that's right- but what do I ask the supplier for here in Scotland my plan was to use type 1 and put a whacked over it to level?!

Sorry daft question but the terminology is tripping me up!


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PostPosted: Wed Apr 05, 2017 11:25 pm 
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strath44 wrote:
Evening folks!

I'm building quite a large 16x9 ft shed in the garden from a wood panel section kit

The soil has been dug out by hand about 4 inches so far, my plan was for 4 inches of sub base then 3 inches concrete.

What is the sub base best made of my friend says ballast I'm not sure that's right- but what do I ask the supplier for here in Scotland my plan was to use type 1 and put a whacked over it to level?!

Sorry daft question but the terminology is tripping me up!


Type 1 (or Road Stone) is ideal for what you propose when wackered.
Ballast is usually the term used for the stone used in Railway line construction.


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PostPosted: Wed Apr 05, 2017 11:41 pm 
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Type1 is what you want.
Ballast here is a sand & stone mix used typically for making concrete.


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PostPosted: Thu Apr 06, 2017 8:43 am 
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Perfect thanks that was what I thought (the use of type 1) but regional terminology and reading American websites had me confused!

I am getting concrete delivered but out of interest can a bulk bag of ballast be mixed directly with cement to make concrete or does it need more sand or stone to get the ratios right?


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PostPosted: Thu Apr 06, 2017 9:01 am 
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This may help but loads of other useful stuff on here to look at
http://www.pavingexpert.com/aggs01.html#ballast

Mike

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PostPosted: Thu Apr 06, 2017 10:53 am 
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strath44 wrote:

I am getting concrete delivered but out of interest can a bulk bag of ballast be mixed directly with cement to make concrete or does it need more sand or stone to get the ratios right?


For your application, you just adjust the cement content depending on required strength.


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PostPosted: Thu Apr 06, 2017 11:18 am 
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strath44 wrote:
Perfect thanks that was what I thought (the use of type 1) but regional terminology and reading American websites had me confused!

I am getting concrete delivered but out of interest can a bulk bag of ballast be mixed directly with cement to make concrete or does it need more sand or stone to get the ratios right?



The direct answer to your question is yes!

The bulk bag of Ballast in this case would contain the appropriate amount of sharp sand. The mix in this case would
be 6(Balast) : 1(Cement)
If the aggregate and sharp sand had been bought seperate, the mix woulb be for general strength Conrete - 4 (Agg) : 2 (Sharp) : 1 (Cement)
Depending on the quantity you want, use a suitable container / bucket to gauge the mix


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PostPosted: Sat Apr 08, 2017 10:01 am 
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davyp1 wrote:
The direct answer to your question is yes!

The bulk bag of Ballast in this case would contain the appropriate amount of sharp sand. The mix in this case would
be 6(Balast) : 1(Cement)
If the aggregate and sharp sand had been bought seperate, the mix woulb be for general strength Conrete - 4 (Agg) : 2 (Sharp) : 1 (Cement)
Depending on the quantity you want, use a suitable container / bucket to gauge the mix


Thanks for that reminder = the mix is by VOLUME and not by weight???


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PostPosted: Sat Apr 08, 2017 1:14 pm 
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AAA.Handy.Man wrote:
davyp1 wrote:
The direct answer to your question is yes!

The bulk bag of Ballast in this case would contain the appropriate amount of sharp sand. The mix in this case would
be 6(Balast) : 1(Cement)
If the aggregate and sharp sand had been bought seperate, the mix woulb be for general strength Conrete - 4 (Agg) : 2 (Sharp) : 1 (Cement)
Depending on the quantity you want, use a suitable container / bucket to gauge the mix


Thanks for that reminder = the mix is by VOLUME and not by weight???


Cheers AAA, back in the day we used to knock up a gauge box on site & use it for both Mortar and Concrete mix's.
I guess a bucket or even shovel counts are in common use today.


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