3D-PRINTED GREEN MAGNESIUM-BASED CEMENT CONCRETE PRODUCT AND CURING METHOD THEREOF

The invention discloses a 3D printing green magnesium-based cement concrete product and a curing method thereof. The 3D printing green magnesium-based cement concrete product comprises the following raw materials in parts by weight: 100 parts of magnesia, 110-150 parts of magnesium-based standard sand, 0-50 parts of water granulated slag sand, 0-40 parts of engineering residue soil, 120-140 parts of phosphate, 100-130 parts of magnesium salt, 5-15 parts of an additive, 10-25 parts of dry ice and 60-90 parts of water. According to the preparation method, the rice-grain-shaped dry ice is added into the green magnesium-based cement newly-mixed slurry, so that the temperature of the newly-mixed slurry is reduced, the hydration exothermic reaction is promoted, and the carbonization degree and the hydration degree of the newly-mixed slurry are remarkably improved; the magnesium-based standard sand is light calcined magnesium oxide and dead calcined magnesium oxide with different particle sizes, so that the surface of part of the magnesium-based standard sand can participate in hydration reaction, and the interface bonding performance of the magnesium-based standard sand and hydrated slurry is enhanced; the hardened green magnesium-based cement concrete product is placed in a temperature control carbonization chamber for curing, so that the microstructure of the green magnesium-based cement is further improved.