Farm silos of salt-glazed tiles are beautiful and are standing unused. I would like to recover these tiles for reuse on part of my house -- need suggestions about how to dissolve or loosen the mortar. I have found two built apparently from a kit about 1920 or so. A metal plate says The Dickey Glazed Tile Silo, W S Dickey Clay Mfg Co, Kansas City Mo USA. The tiles surfaces are about 12.5 inches horizontal and 12 inches vertical. They appear to be about 4 inches thick. The silo interior is about 14 feet in diameter. I cannot find any trace of the manufacturer now. I suspect the kit had directions for exactly the mortar mixture to use. The tiles probably have a "tongue and groove" connection horizontally. I don't know about the vertical shape. Is there a chemical that might soften mortar used about 1920? Would sand-blasting work? Is a concrete saw the only possibility? Thanks for any helpful suggestions.