On 02/07/2018 18:25, T i m wrote:
On Mon, 2 Jul 2018 18:07:21 +0100 (GMT+01:00), Jim K
wrote:

T i m Wrote in message:
On Mon, 2 Jul 2018 16:51:42 +0100 (GMT+01:00), Jim K
wrote:

snip

Cement :total water ratio should be at maximum equal.
Can use less water with plasticisers (no fairy liquid please).

On this subject ... What type of sand (if any) and ratio of cement
(and what kind) would you typically use if casting / forming a garden
planter?

Typically?

A bit vague I accept.

See if this puts more detail in the

https://www.youtube.com/watch?v=tWGzwCG7qkA

I'd start my trials with a strong concrete mix with small
aggregate (angular not pea gravel think granite chippings)
--

I can see how that would be idea for something chunky you were going
to cast but for the 'poured' process shown above, I'm thinking it
would be too lumpy?

That looks like they are using a dryish "building" or "soft" sand... The
"concrete" looks like a fairly strong mix of cement and the same sand.


Didn't I read here possibly something about some types of cement
having fibers in it to make it stronger when used with just fine sand
or somesuch?


Yup you can add fibres - they give extra tensile strength which is handy
for applications like that.


--
Cheers,

John.

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