#1  
Old 10-18-2007, 10:28 AM
Serf
 
Join Date: Jul 2007
Location: SF Bay Area - California
Posts: 15
Default Refractory mortar vs castable?

Is refractory mortar, like RefMix, the same as refractory castable?

Could RefMix be used to cast whole shapes like dome entrances or small domes?

Thanks,
dave
Reply With Quote
  #2  
Old 10-19-2007, 10:50 AM
Serf
 
Join Date: Jul 2007
Location: SF Bay Area - California
Posts: 15
Default Re: Refractory mortar vs castable?

This seems like a pretty straight fowrard one, no body knows the answer to this?
Reply With Quote
  #3  
Old 10-19-2007, 11:36 AM
dmun's Avatar
Moderator
 
Join Date: Jul 2005
Location: New Jersey USA
Posts: 4,216
Default Re: Refractory mortar vs castable?

The short answer is no. Like regular mortar mix differs from concrete mix (it's sticky and has finer aggregates) castable refractory is different stuff from refractory mortar. Mortar might well crack when used that thickly.
Reply With Quote
  #4  
Old 10-19-2007, 11:51 AM
Serf
 
Join Date: Jul 2007
Location: SF Bay Area - California
Posts: 15
Default Re: Refractory mortar vs castable?

Quote:
Originally Posted by dmun View Post
The short answer is no. Like regular mortar mix differs from concrete mix (it's sticky and has finer aggregates) castable refractory is different stuff from refractory mortar. Mortar might well crack when used that thickly.
As I suspected, but I wan't sure if what was being called "mortar" in the case of RefMix was infact true mortar or cement used as mortar to bind the bricks.

Thanks for the reply.
Reply With Quote
  #5  
Old 10-19-2007, 12:09 PM
CanuckJim's Avatar
Il Pizzaiolo
 
Join Date: Jan 2006
Location: Prince Albert, Ontario, Canada
Posts: 1,480
Default Re: Refractory mortar vs castable?

Dave,

I'm no expert on the exact composition of castable refractories, but I have used a fair bit of them. Castables contain refractory aggregate as well as refractory cement. The two types I've used are Kastite Lite (which is not meant for direct flame exposure) and Kastite (which is). The difference between them, as I understand it, is the percentages of of alumina and other materials. An equal cubic measure of Kastite Lite would be significantly lighter when cured than Kastite. There is also Super Kastite (which is even denser). I have cast vents out of Kastite and will be casting a lintel out of it next week, but I've never used Super Kastite.

Jim
__________________
"Made are tools, and born are hands"--William Blake, 1757-1827
Reply With Quote
  #6  
Old 10-19-2007, 02:08 PM
james's Avatar
Brick Oven Merchant
 
Join Date: Mar 2005
Location: Pebble Beach, CA
Posts: 4,648
Default Re: Refractory mortar vs castable?

RefMix is a mortar used to set precast pizza oven and fireplace pieces as well as fire bricks. It is very smooth, like a masons mortar. As others have noted, it is designed to be applied pretty thinly. The technical spec limits the thickness to about 2 1/2".
James
__________________

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
  #7  
Old 10-30-2007, 01:26 PM
Wlodek's Avatar
Apprentice
 
Join Date: Jul 2007
Location: England's Lake District
Posts: 134
Default Re: Refractory mortar vs castable?

Just to add the castable side: the helpful man from Purimachos told me that I can use the castable (the one he suggested, not just any) to join elements of precast ovens.

Best wishes,
W.
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
Refractory Mortar Question Fudugazi Pompeii Oven Construction 22 07-27-2010 08:12 AM
Refractory CEMENT vs. Refractory MORTAR Chris Getting Started 10 09-12-2009 10:18 AM
Refractory Mortar Vs. Regular Mortar OvenBoy Design Styles, Chimneys and Finish 7 10-09-2008 03:56 PM
Fire Mortar vs. Refax Refractory Mortar southpaw Pompeii Oven Construction 4 04-07-2007 06:02 AM
How strong is the FB refractory mortar recipe? Fio Pompeii Oven Construction 7 06-19-2006 09:15 AM


All times are GMT -7. The time now is 02:22 PM.

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