HC

[ Admixtures for cement and concrete; sprayed concrete accelerators ]

Non-metallic building materials, namely, cement, [ concrete, and aggregates for concrete composed of sand, gravel, ground rock, recycled concrete, blast furnace sand, expanded clay, bricks, or polystyrene; ] components used in making cement, namely, [ clinker, gypsum, granulated blast furnace slag, ] fly ash [, pozzolans, silica fume, burned shale, and limestone; components used in making concrete, namely, sand, gravel, fibers, pozzolans, silica fume, fly ash, ground blast-furnace slag, ground trass, and ground limestone ]