sand-struck brick

soft-mud brick

Brick produced by molding relatively wet clay (20 to 30% moisture), often by hand; if the inside of the mold is sanded to prevent sticking of clay, the product is sand-struck brick; if the mold is wetted to prevent sticking, the product is water-struck brick.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.