I am building my first wood-burning oven; I have been using a book “The bread builders by Daniel Wing & Alan Scott” and the web, thus far things have been going great. This week I would like to lay the oven wall firebricks and arch bricks. The book states refectory mortar or a mixture of 10 parts mortar sand, 3 parts Portland cement, 1 ½ parts fireclay. This will provide a hardened mortar that will have an expansion rate similar to the firebrick as well as making it sticky. It would be a shame to get my bricks; insulation, cladding and façade complete only to find the oven mortar fail. There appears to be a thousand opinions out there should I follow the book?:
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