I've been reading this group (Jeez! Isn't it busy[1]?) for a couple of
weeks or so. However, I've not seen any pointers towards any sort of FAQ
(or, given the wide variety of DIY activities covered herein, FAQs). I
*have* seen mention in some thread about how much aggregate and cement
one might require for a given sized lump of concrete: however, I cannot
now find that post.

I need to concrete in a 3in diameter pipe to my garden; this is for
mounting a steerable satellite dish (of 1.2m diameter: AIUI, this can
encounter a loading of about 4tonne in a severe gale[2]). I have dug a
hole which "feels" right: this is 820x600mm, and although deeper, I
propose filling it to 500mm (there will then be either 100mm of soil and
turf on top, or shingle and a patio, depending upon the directions of the
Clerk of Works ;-).

I make that approx 0.25m^3 of concrete: how do I calculate how much agg
and cement is required for this?

If it's significant, I didn't encounter *any* subsoil until I'd reached
the bottom of the aforementioned excavation: all the soil removed is
very friable loam, almost black in colour: I'd guess that the previous
occupants had put their chimney sweepings into their garden for the 180
years since the house was built.

[1] Yet, despite this, not seemingly flooded by trolls; what a refreshing
change!
[2] There will be approx 1.1m of this dish above ground level.
--
Brian {Hamilton Kelly}
"Je n'ai fait celle-ci plus longue que parce que je n'ai pas eu
le loisir de la faire plus courte."
Blaise Pascal, /Lettres Provinciales/, 1657

In message , Brian {Hamilton Kelly}
writes
I've been reading this group (Jeez! Isn't it busy[1]?) for a couple of
weeks or so. However, I've not seen any pointers towards any sort of FAQ
(or, given the wide variety of DIY activities covered herein, FAQs).


Copied and pasted in full from phil's post ...


This is an introduction to the UK.D-I-Y newsgroup for new and
experienced Do-It-Yourselfers in the United Kingdom. If you want help,
or just want to find out more about a problem before calling in 'the
professionals' you are welcome to 'pick our brains'.

There is a good chance your query, or a very similar one, has already
been discussed and answered by the group, so please have a look at the
Google uk.d-i-y archive, and our companion website for Frequently Asked
Questions (the FAQ) before posting a question here.

The Google uk.d-i-y archive is available for searching at
http://tinyurl.com/65kwq

and the UK.D-I-Y FAQ is at http://www.diyfaq.org.uk/

The FAQ website gives background information about a diverse range of
DIY topics, and guidance on formulating questions to post here that will
most easily get the answers you need. For example, you should explain
the background to the problem as well as asking your question.

The FAQ includes detailed information on common DIY problems in areas
such as central heating, plumbing, electrical, decorating, security,
plastering, and tools. It also has a reference section pointing to other
useful sites and companies.

You should be aware that although replies in most cases are perfectly
accurate and sensible, there are occasions when someone posts an
inappropriate answer. In this case one of the regulars is very likely to
post a correction, so it is always a good idea to check back later.

The FAQ makes clear that commercial advertising in the group is NOT
welcome. Unsolicited advertising is considered abuse, and is likely to
be reported as abuse to the advertiser's ISP. However, replies to
specific questions which mention products sold by the person replying
are acceptable. There is more information on commercial participation in
the FAQ.


Phil
The uk.d-i-y FAQ is at http://www.diyfaq.org.uk/ The Google uk.d-i-y
archive is at http://tinyurl.com/65kwq Remove NOSPAM from address to
email me


[1] Yet, despite this, not seemingly flooded by trolls; what a refreshing
change!

We can only afford to feed one

--
geoff

Brian {Hamilton Kelly} wrote:

I've been reading this group (Jeez! Isn't it busy[1]?) for a couple of
weeks or so. However, I've not seen any pointers towards any sort of FAQ
(or, given the wide variety of DIY activities covered herein, FAQs). I
*have* seen mention in some thread about how much aggregate and cement
one might require for a given sized lump of concrete: however, I cannot
now find that post.

Try the very good pavingexpert site, there is a vast amount of very good
info here on all sorts of things, but it does concrete in some detail:

http://www.pavingexpert.com/concmix1.html



--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On Tuesday, in article

"John Rumm" wrote:

Brian {Hamilton Kelly} wrote:

I've been reading this group (Jeez! Isn't it busy[1]?) for a couple of
weeks or so. However, I've not seen any pointers towards any sort of FAQ
(or, given the wide variety of DIY activities covered herein, FAQs). I
*have* seen mention in some thread about how much aggregate and cement
one might require for a given sized lump of concrete: however, I cannot
now find that post.

Try the very good pavingexpert site, there is a vast amount of very good
info here on all sorts of things, but it does concrete in some detail:

http://www.pavingexpert.com/concmix1.html

Many thanks; bookmarked.

--
Brian {Hamilton Kelly}
"Je n'ai fait celle-ci plus longue que parce que je n'ai pas eu
le loisir de la faire plus courte."
Blaise Pascal, /Lettres Provinciales/, 1657

On Monday, in article
"raden" wrote:

In message , Brian {Hamilton Kelly}
writes
I've been reading this group (Jeez! Isn't it busy[1]?) for a couple of
weeks or so. However, I've not seen any pointers towards any sort of FAQ
(or, given the wide variety of DIY activities covered herein, FAQs).


Copied and pasted in full from phil's post ...

Which arrived, as explained elsewhere, on the download that acompanied
the uploading of my query.

What's the posting frequency anyway?

--
Brian {Hamilton Kelly}
"Je n'ai fait celle-ci plus longue que parce que je n'ai pas eu
le loisir de la faire plus courte."
Blaise Pascal, /Lettres Provinciales/, 1657

On Mon, 11 Jul 2005 23:52:03 +0100 (BST), (Brian
{Hamilton Kelly}) wrote:


I make that approx 0.25m^3 of concrete: how do I calculate how much agg
and cement is required for this?


There are 42 wickes bags of aggrigate to the tonne, and arround 2
tonnes to the cube. So you need 21 bags of aggrigate.

The easiest is to buy "ballast" which is sand/cement allready mixed.


4:1 ballast to cement is good


Rick