On Sep 23, 3:58*pm, stuart noble wrote:
On 23/09/2010 15:26, Lee Nowell wrote:





Hi All,

I am looking at cast the "trough" of my outdoor BBQ out of
"concrete" (i.e. the bit where you light the charcoal). *Can I used
normal concrete with some reinforcing bars? *I have assumed not but
wondered if anyone had tried it?

I was pointed in the direction of "castable 1400" which is fine to
1400 deg c but this is very expensive (£25/ bag). *I was also
wondering whether I switch regular cement with fondu cement and mix
the concrete as usual would work? *Also, is it OK to use reinforcing
mesh/ bars? *I was wondering whether they would expand within the
concrete as they got hot and crack the whole thing?

Any help appreciated.

thanks

Lee.

I was thinking maybe fire cement, but I see from the SF site that this
is actually sodium silicate. Maybe you could combine it with ordinary
cement.- Hide quoted text -

- Show quoted text -

One thing I forgot to mention was that the overall volume of the
concrete is probably around 0.2 m3 (assuming a 100mm slab will be
strong enough) so will need a lot of concrete