Building a charcoal barbeque advice
BIGEYE
blocks. The price of bricks is very expensive so I am swaying towards the
blocks.
Has anyone built a bbq with concrete blocks and has there been any problems
with concrete due to heat?
TIA
Ian Stirling
Concrete will be fairly rapidly destroyed at somewhere over 100C, the
water used to make it "boils off", and it disintegrates into a pile of
dust.
If it's not exposed to actual flame, it'll probably be OK.
Christian McArdle
problems
> with concrete due to heat?
At university we built ourselves a barbecue.
4 aerated concrete blocks from a nearby retaining wall as legs (two blocks
on end per leg). Then the fire surface was a cracked concrete paving flag.
The back and sides of the surface were windproofed using several old grade B
bricks found semi-submerged into some flower bed. The grille was formed by a
chrome wire shelf rescued from our fridge which had fortuituously exploded
some weeks earlier and been replaced.
It was the best barbecue I've ever used. Easy to light, and excellent at
keeping a nice medium heat for long periods, much better than any
commercially bought one.
The next best barbecue I've used was built entirely from concrete decorative
buff walling blocks from B&Q with their built in barbecue kit (grille + fire
pan). The hot concrete goes a little pink, which is soon unnoticeable due to
the pleasing carbon patina that develops over the season.
I'd be a little concerned about using aerated concrete for this, but dense
concrete would be fine.
Christian.
Tony Bryer
> Concrete will be fairly rapidly destroyed at somewhere over 100C, the
> water used to make it "boils off", and it disintegrates into a pile of
> dust.
If that were so reinforced concrete buildings would have next to no fire
resistance.
--
Tony Bryer SDA UK 'Software to build on' http://www.sda.co.uk
Free SEDBUK boiler database browser http://www.sda.co.uk/qsedbuk.htm
sPoNiX
Make most of the bbq out of concrete and use a couple of courses of
proper bricks near the hot part.
sPoNIX
nightjar
"BIGEYE" <Securitypatch@盜oft.is.invalid> wrote in message
news:40b335e4$0$41159$ed26...@ptn-nntp-reader01.plus.net...
I have a barbeque and pizza oven built of concrete building blocks. They
came with the house and I've never used them, but they appear to have seen
plenty of use with no obvious signs of problems.
Colin Bignell
Jeremy Collins
> I have a barbeque and pizza oven built of concrete building blocks. They
> came with the house and I've never used them, but they appear to have seen
> plenty of use with no obvious signs of problems.
Outdoor pizza oven? What a *fantastic* idea! Are you
able to post a picture?
--
jc
Remove the -not from email
Nick Brooks
I used the bricks out of an old night storage heater. (Often free, look
in local paper) they have cracked a bit but hold the heat in well
Nick Brooks
Ian Stirling
> In article <BUGsc.7064$wI4.8...@wards.force9.net>, Ian Stirling wrote:
>> Concrete will be fairly rapidly destroyed at somewhere over 100C, the
>> water used to make it "boils off", and it disintegrates into a pile of
>> dust.
>
> If that were so reinforced concrete buildings would have next to no fire
> resistance.
In some ways it's the other way round.
The act of boiling off absorbs an enormous amount of energy.
I don't know the exact temperature, it's not 100C, but significantly
higher, as the water has reacted with the cement and is largely bound
into the structure.
Scott
"Ian Stirling" <ro...@mauve.demon.co.uk> wrote in message
news:BUGsc.7064$wI4.8...@wards.force9.net...
Below 300 C
No appreciable damage done
300 to 500 C
Damage to concrete requires careful assessment (especially above 400C).
Concrete will be weakened and some loss of modulus will have occurred.
Prestressing will be down to 50% of its strength above 400C and cold worked
steel will be affected above 450C.
Above 500 C
At these temperature significant loss of strength occurs in the concrete and
the modulus of the concrete is significantly reduced.
nightjar
"Jeremy Collins" <jd.co...@ntlworld-not.com> wrote in message
news:fIJsc.74$XI5.53@newsfe2-win...
> nightjar <nightjar@ wrote:
>
>
> > I have a barbeque and pizza oven built of concrete building blocks. They
> > came with the house and I've never used them, but they appear to have
seen
> > plenty of use with no obvious signs of problems.
>
> Outdoor pizza oven? What a *fantastic* idea! Are you
> able to post a picture?
That could be difficult. It is in the South of France and I'm not.
Essentially, it appears to be a tunnel, built onto the side of the barbeque
chimney, with a hinged iron door. I presume it works like an old-fashioned
bread oven - you build a fire inside to get everything hot, rake out the
fire and then put the pizza inside to cook. Personally, I prefer to use the
electric oven if I'm cooking pizza.
Colin Bignell
Andy Hall
<nightjar@<insert_my_surname_here>.uk.com> wrote:
>
>"Jeremy Collins" <jd.co...@ntlworld-not.com> wrote in message
>news:fIJsc.74$XI5.53@newsfe2-win...
>> nightjar <nightjar@ wrote:
>>
>>
>> > I have a barbeque and pizza oven built of concrete building blocks. They
>> > came with the house and I've never used them, but they appear to have
>seen
>> > plenty of use with no obvious signs of problems.
>>
>> Outdoor pizza oven? What a *fantastic* idea! Are you
>> able to post a picture?
>
>That could be difficult. It is in the South of France and I'm not.
>Essentially, it appears to be a tunnel, built onto the side of the barbeque
>chimney, with a hinged iron door. I presume it works like an old-fashioned
>bread oven - you build a fire inside to get everything hot, rake out the
>fire and then put the pizza inside to cook.
It could be an adaptation of the typical Italian design where there is
a reasonably sized chamber and a wood fire built to one side.
The whole thing heats up as you say, but the fire is left in place and
wood added. The smoke is driven upwards so does not overly flavour
the pizza. These are great if used with thin and simple pizzas
made from fresh ingredients - not so much for supermarket thick
ones....
>Personally, I prefer to use the
>electric oven if I'm cooking pizza.
>
>Colin Bignell
>
.andy
To email, substitute .nospam with .gl
Owain
| I have a barbeque and pizza oven built of concrete building blocks.
You should invite your neighbours round to a party as a thank-you for
keeping an eye on the house whilst you were over in r.t.e. :-)
Owain
nightjar
"Andy Hall" <an...@hall.nospam> wrote in message
news:vv87b0tuv47145lbl...@4ax.com...
The barbeque fire is next to the oven, so it could be heated by that. That
certainly would make more sense, as there does not seem to be any way for
smoke to escape from the oven if the fire is lit inside it. As I say, I've
never used it nor am I likely to. Barbeques are not my favourite way of
eating.
Colin Bignell
nightjar
"Owain" <owain...@stirlingcity.co.uk> wrote in message
news:108551514...@nnrp-t71-01.news.uk.clara.net...
Its in the one I'm at while the neighbours are keeping an eye on the other
one :-)
Colin Bignell
The Natural Philosopher
Yes, and no.
I learnt my barbecuing inAfrica, weher anything goes.
The one I have now - and SWMBO thionks its ugly and needs dismantling -
is simply conctere blocks oilel on top of one another with teh oidd air
gap. At about 3 courses hogh, a piece of industrail expaneded steel
flooring is laid on top, and two courses of bricks dry laid over that
with another layer of mesh on top. A couple of bricks hold it down.
It tends to burn small logs rather than charcoal, for extra flavour. Its
often too hot to cook - needs throttling :)
Oh, the combustible material goes on the lower mesh, and the burgers and
bananas on the top layer.
.