noun
A construction and civil-engineering term for stone crushed into small pieces, used for roadbeds, drainage layers, parking lots, and similar surfaces.
駐車場に砕石を敷いた。
We spread crushed stone over the parking lot.
この道路の路盤に
Crushed stone is used in the base layer of this road.
noun, noun or participle which takes 'suru', transitive verb
crushing rock; crushing stone
Rare as a verbal noun or する verb; in modern technical writing, other terms such as 破砕 may also be used for the process of crushing rock.
採石場では岩石を砕石して道路用の材料にする。
At the quarry, rock is crushed and made into material for roads.