#1  
Old 12-27-2011, 12:56 PM
Peasant
 
Join Date: Jun 2011
Location: Newcastle, Australia
Posts: 32
Default Home Brew Mortar Question

Hi Fellow Ovenistas',

I've just realised something about my home brew mix that could be quite a problem.
When purchasing the materials for my "home brew" mortar" (3 parts-washed sand, 1 part GP cement, 1 part -lime & 1 part Fireclay), I have just realised, "after completing the vault" of course, that I had used "Builders Clay" and not "Fireclay" in the brew.

Does anyone have any idea how much of a problem is this. Will this cause more cracking to occur than would otherwise have been the case and does it have any effect on the integrity of the vault?

Do you think I am over reacting?

Look forward to hearng your thoughts.

Cheers Fornoa.
Reply With Quote
  #2  
Old 12-27-2011, 05:45 PM
Gulf's Avatar
Il Pizzaiolo
 
Join Date: Sep 2011
Location: Mississippi
Posts: 1,547
Default Re: Home Brew Mortar Question

I may not be the one who should answer this but, I did a google on builders clay and found this at Boral Brick. Builders Clay

It states that it is a "fire clay" and has refractory properties. From what I have read clay can be dug straight from out of the ground, dried, pulverized, and formed into a refractory material for a WFO.

I think that you are alright, but I will yield to anyone who has direct experience with this material.
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #3  
Old 12-27-2011, 09:54 PM
cobblerdave's Avatar
Il Pizzaiolo
 
Join Date: Jan 2010
Location: brisbane australia
Posts: 2,227
Default Re: Home Brew Mortar Question

Gudday
Dont sweat....Fireclay is unfired clay as is Brickies clay. It will proform the same function...give you a plasitic workable mortar...provide a measure of slip between the particles of the set mortar so its not to rigid. and has will not break down under heat.

Regards Dave
Reply With Quote
  #4  
Old 12-28-2011, 12:57 AM
Peasant
 
Join Date: Jun 2011
Location: Newcastle, Australia
Posts: 32
Default Re: Home Brew Mortar Question

Thanks Clobberdave and Gulf.

I checked the Boral link gulf offered and then searched further online and found another WFO site which had a the following comment "I used a mixture of fireclay (called Builders Clay down under), ".

Looks like Builders clay and Fire Clay are the same thing in Australia. I noticed at the hardware store that they also had a Brikkies Clay which was a white powder as compared to the Builders Clay which was a light terracotta colour.

I will check out the difference detween Builders Clay and Brikkies Clay and post it here soon.

Thanks for your healp guy's. I can stop worrying now.

Cheers Fornoa
Reply With Quote
  #5  
Old 12-28-2011, 02:37 AM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,701
Default Re: Home Brew Mortar Question

The product produced by Cement Australia called "Bricklayers clay (fireclay) is not fireclay. On contacting them they told me that it is not suitable as a refractory it is designed as a mortar additive only, who knows what's in it.When I complained about the mislabeling they said sorry but are unlikely to change it for one complaint. However because of the low temperatures we fire to I should think that any powdered clay would be sufficient.
Reply With Quote
  #6  
Old 12-28-2011, 04:00 AM
Peasant
 
Join Date: Jun 2011
Location: Newcastle, Australia
Posts: 32
Default Re: Home Brew Mortar Question

Hi DavidS,

Thanks for the input.
I will steer clear of the Cement Australia product and stick with the Boral Builders Clay.

At least they specify that it has refractory properties.

Thanks again.

Cheers Fornao.
Reply With Quote
  #7  
Old 12-28-2011, 05:28 AM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,701
Default Re: Home Brew Mortar Question

At 80% silica the Boral product could hardly qualify as fire clay, however I think it would still suffice at the temps we use.
Reply With Quote
  #8  
Old 12-28-2011, 05:31 AM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,701
Default Re: Home Brew Mortar Question

Real fireclay can be obtained from Brickpave in Brisbane. ( for Australian members)
Reply With Quote
  #9  
Old 12-28-2011, 11:07 PM
Peasant
 
Join Date: Jun 2011
Location: Newcastle, Australia
Posts: 32
Default Re: Home Brew Mortar Question

Hi Davis s,

I noted that the Boral Builders Clay has 13% Aluminium Oxide (Al2O3).
Do you know what the Aluminium Oxide content of the clay sold by Brickpave?

Could be interesting to nkow.

Cheers Fornoa
Reply With Quote
  #10  
Old 12-29-2011, 01:23 AM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,701
Default Re: Home Brew Mortar Question

Quote:
Originally Posted by fornoa View Post
Hi Davis s,

I noted that the Boral Builders Clay has 13% Aluminium Oxide (Al2O3).
Do you know what the Aluminium Oxide content of the clay sold by Brickpave?

Could be interesting to nkow.

Cheers Fornoa
No, sorry I don't, but you could give them a call to find out. It will be high in alumina and low in silica rather than the stuff you were going to use, which was just the opposite.The high alumina, low silica content is to avoid the silica fluxing especially in the presence of iron oxide and turning to glass-melting. nearly all Australian clays are high in iron oxide and often the % of this will also be quoted in the specs of refractory materials. But this will not happen at the temps we fire to so I can't really see a problem, I think any powdered clay should be OK. But I may be wrong
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Why does home brew need to cure? mrchipster Tools, Tips and Techniques 30 10-06-2011 01:17 PM
home brew mix waynespizzaworld Pompeii Oven Construction 13 08-05-2011 03:20 PM
Fire brick Mortar Mix question? EricU Getting Started 8 05-28-2011 09:24 PM
How fine should the sand be for home brew mortar? azatty Finding Building Materials 1 03-04-2011 09:36 AM
mortar question shingletown paul Getting Started 14 12-14-2009 06:52 PM


All times are GMT -7. The time now is 06:55 AM.

Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
© 2006/10 Forno Bravo, LLC