savirikas vormisegu (üle 35 % savi) suurte põrandvormide vormimiseks suurte valandite tootmisel (vt savi; vrd vormisavi), a molding material consisting of sand, silt, and bonding clay (over 50%) used over brickwork or other structural backup material for making massive castings, usually of iron and steel (see: clay; compare: foundry clay)