Old 04-16-2010, 11:36 AM
Master Builder
Join Date: Jul 2009
Location: Los Angeles
Posts: 942
Default Re: Fire clay Mortar Vs Refractor Mortar FB.... HeatStop... Earthcore

Originally Posted by Scott Welker View Post
I used regular mortar, right off the shelf, and mixed in 20% fireclay. It was easy to work with, dried very hard, and is holding up well. I've had several firings where the oven got much hotter than I like, over 1000F, and no flaking, cracks, or any issues whatsoever have arisen with the mortar.

Not as cheap as mix-your-own but not expensive either, extremely simple and easy to work with. It was the best choice for me.

I like this approach as I already have a couple of bags of type s mortar from another project I'm working on and I can pick up a 50lb bag of fireclay for $8.

Does it matter the type of sand that's used in the type s mortar mix?


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

Weber 22-OTG / Ugly Drum Smoker / 34" WFO

Last edited by fxpose; 04-16-2010 at 12:25 PM.
Reply With Quote
Old 04-16-2010, 04:12 PM
david s's Avatar
Il Pizzaiolo
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 5,160
Default Re: Fire clay Mortar Vs Refractor Mortar FB.... HeatStop... Earthcore

I've been told that silica sand is preferable because it has sharper edges and corners therfore providing more grip for the materials to bond against. The silica is not a problem (melting) at the low temps we fire at. Not sure about its thermal expansion characteristics.
Kindled with zeal and fired with passion.
Reply With Quote
Old 05-20-2010, 07:44 PM
Join Date: May 2008
Location: nj
Posts: 26
Default Re: Fire clay Mortar Vs Refractor Mortar FB.... HeatStop... Earthcore

Both local Masonry Supply places I bought Fire clay from suggested a mix ratio of 1:1:1 Fire clay: sand: portland cement. A post above stated that they had no problems with a similar ratio. I hope I do not have issues as well. Question: what if cracking is excessive- what is the course of action- repoint with heat stop?
Reply With Quote

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
High Heat Mortar Primer james Getting Started 88 04-29-2015 08:36 PM
Concrete V's Fire Proof Mortar danknapp Tools, Tips and Techniques 8 11-30-2010 02:14 PM
Refractory Mortar Poll kebwi Tools, Tips and Techniques 73 05-23-2010 11:00 PM
Fire Mortar vs. Refax Refractory Mortar southpaw Pompeii Oven Construction 4 04-07-2007 05:02 AM
Fireclay Fudugazi Newbie Forum 1 05-16-2006 09:58 PM

All times are GMT -7. The time now is 12:53 PM.

Powered by vBulletin® Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
2006/10 Forno Bravo, LLC