cement rock

cement rock

[si′ment ‚räk]
(petrology)
An argillaceous limestone containing lime, silica, and alumina in variable proportions and usually some magnesia; used in the manufacture of natural hydraulic cement.

cement rock, cement stone

A clayey limestone whose percentage composition of alumina, lime, and silica is about that of cement; may be used without the addition of other earth materials.
References in periodicals archive ?
His first experience with sculpture came as a student, when he was commissioned to make cement rock formations and other decorative sculptures for beach resorts in Sharm el-Sheikh: an interval that he recalls now with a hint of embarrassment, furrowing his brow.
Libya's commercially usable mineral resources, apart from its hydrocarbons, were limited to a large iron-ore deposit in the Wadi ash Shati near Sabha in Fezzan, and scattered, deposits of gypsum, limestone, cement rock, salt, and building stone.
Other minerals found here include cement rock, clay, gypsum, limestone, serpentine rock, shale, silica sand, syenite, tripoli, dimension stone, crushed stone, sand, gravel and slate.