Low-alkali plant-growing concrete based on steel slag and preparation method of low-alkali plant-growing concrete

The invention discloses low-alkali plant-growing concrete based on steel slag and a preparation method thereof, and relates to the technical field of building materials, the low-alkali plant-growing concrete comprises the following components in parts by mass: steel slag aggregate, steel slag powder, granulated blast furnace slag powder, gypsum, calcium aluminate, a reinforcing agent, a water reducing agent, a retarder and water, the recycled micro-powder composite expanding agent is prepared from the following components: 300 to 450 parts of steel slag aggregate, 20 to 30 parts of steel slag powder, 30 to 40 parts of granulated blast furnace slag powder, 15 to 20 parts of gypsum, 3 to 5 parts of calcium aluminate, 3 to 5 parts of reinforcing agent, 0.2 to 0.5 part of water reducing agent, 0.05 to 0.15 part of retarder and 25 to 35 parts of water. The process steps are relatively simple, and the steel slag, the mineral slag, the ardealite and the calcium aluminate are all from industrial by-products. The plan