Acid brick
From Wikipedia, the free encyclopedia
Acid brick or acid resistant brick is a specially made form of masonry brick that is chemically resistant and thermally durable.[1] Acid brick is created from high silica shale and fired at higher temperatures than those used for conventional brick. Some manufacturers create the brick by baking it for over a week. It has an average compressive strength of approximately 23,000 PSI.
The ASTM specification C-279 creates specifications for acid brick properties. Acid brick is not resistant against hydrofluoric acid or strong alkali.