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Topic: Laying kerbs. concrete mix?< Next Oldest | Next Newest >
Gooty
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Posted: 19 April 2017,14:52 QUOTE

Marshall website says 1:2:4 (Cement:Sand:Aggregate), and others say 1:3:6.
My question is what type of Aggregate and from where?

I've got the cement and sharp sand from wickes but they don't appear to have 6-10mm gravel.
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Tony McC
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Posted: 19 April 2017,16:54 QUOTE

Kerbs for what purpose?

1:3:6 (C7.5 or GEN 0) is the usual for road kerbs, and it's more than ample for driveway/patio kerbs.

Much more on concrete mixes here....

Designated Concrete Mixes

...and on a mixed on-site C7.5.....

Bedding Concrete

Try shopping around: most builders' merchants will have a 6-10mm gravel. It's a reasonably common product.


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Gooty
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Posted: 19 April 2017,21:28 QUOTE

My new drive butts on to a side road (private).
The top of the kerb between the two is level with both but is smashed and worn.

In replacing with new 125x150 bull nose
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jwill
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Posted: 20 April 2017,06:35 QUOTE

If wickes is your only option sure they would stock a 10mm ballast
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Gooty
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Posted: 20 April 2017,07:13 QUOTE

Wickes have 10mm pea shingle.

Is this the correct gravel?
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seanandruby
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Posted: 20 April 2017,07:24 QUOTE

You want all in ballast. That is your stone gravel and stone already mixed. If you buy shingle on it's own you will need to also buy sharp sand. I'm not sure which option comes out cheaper though

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Tony McC
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Posted: 21 April 2017,10:11 QUOTE

Ballast is OK for small, non-critical jobs, but because it's a get-what-you're-given mix of sandy bits and stony bits, there's no real control over the ratio of fine to coarse aggregate, so you get a highly variable concrete.

Those of us lucky enough to live in parts of the nation with good aggregate supplies, never use all-in ballast. It seems to be restricted to the agg-poor SE of Eng-er-land, but, due to the spread of national DIY sheds, it does occasionally make an appearance beyond its natural home.

As long as they don't start distributing that god-awful hoggin stuff - that should never be allowed out of the SE!


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