▎ 摘　　要

NOVELTY - Multi-coupling modified low-carbon cementitious material comprises the base material that 28-67 wt.% magnesium oxide, 10-27 wt.% magnesium chloride, 2-8 wt.% modifier and water (remaining amount) as base material, where the modifier comprises calcined kaolin powder and graphene in a mass ratio is 9:0.8-2, and the calcined kaolin is micron-scale kaolin calcined at 500-1000degreesC, and the graphene is nanoscale graphene. USE - The material is useful in multi-coupling gas-hardened low-carbon cementitious plate for building construction as building interior and exterior walls, interior decoration, partition walls, manufacturing small bridges or handicrafts and in a high-strength adhesive for building (all claimed) a building way i.e. high-rise building. ADVANTAGE - The material: is economical, environmental friendly, light weight, more convenient and beautiful in the decoration construction, and convenient for construction of mechanization and intelligent automation; has simple production method, excellent heat insulation and anti-freezing performance, high strength and small volume, heat insulation, energy saving effect, sound insulation and, excellent adhesive performance, no trace bonding after bonding, and excellent softening coefficient; realizes the regeneration and utilization of resources; improves the performance of magnesium chloride building plate products; provides an air-hardening adhesive for construction; shortens the construction period; and facilitates building decoration; solves the problem of anti-halogen; enhance the water resistance; utilizes the high-strength plate for buildings, etc. can be built directly; obtains improved magnesium chloride-containing lightweight board; can be cured at room temperature in the air and the plate of the bonding, and various performance intensity after bonding; reaches compressive strength about 120 MPa; reduces the self-load; finishes the integrated assembly by combining the adhesive, and reduces assembly number. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a multi-coupling gas-hardened low-carbon cementitious plate, comprising a base material layer and a filler layer, where magnesium chloride in base material is anhydrous magnesium chloride, and the filler layer includes fillers comprising aerated concrete, fly ash, activated carbon gangue, slag, pozzolan, porcelain granule, waste tire scraps, building residues, and/or plant fibers; (2) preparing the multi-coupling gas-hardened low-carbon cementitious plate; (3) a high-strength adhesive, comprising base material and quartz sand; (4) building construction method; (5) a building component; and (6) a building.