Can magnesia cementitious materials completely replace building materials such as bricks and boards? Why?

No, it can only partially replace the plate. This is a gas-hardened cementitious material, also known as magnesite. Magnesium chloride is commonly mixed in civil engineering, and its performance characteristics are: high strength, poor water resistance, high hygroscopicity and easy deformation after moisture absorption. Magnesite is weak in alkalinity and non-corrosive to organic matter, and the concrete made of bamboo reed tendons has good crack resistance; It can also be cemented with wood chips and shavings. Use boards instead of wood to make furniture, magnesite floors, wall materials, packing wooden cases, etc. Adding foaming agent or lightweight aggregate can make thermal insulation materials. Calcium silicate board. The raw materials of calcium silicate board are changed, with loose short fibers such as inorganic mineral fibers as reinforcing materials, and siliceous materials (quartz powder, diatomite, fly ash, etc.). ) and calcareous materials (hydrated lime powder, cement, calcium carbide mud, etc. ), silica powder+calcium powder with good fireproof and moisture-proof durability, and natural log pulp fiber. The quality of building board is often considered, so the calcium silicate board adopts advanced formula to control the drying shrinkage of the board within a reasonable range. After pulping and molding, the curing reaction is accelerated in saturated steam at high temperature and high pressure to form calcium silicate gel.

Glass-magnesium board (commonly known as magnesium oxide board) is a new building material to replace gypsum board. It is made of magnesium oxide, magnesium chloride and water mixed with modifiers, and its performance is stable.