The invention relates to a microbubble magnesia
cement internal / external wallboard and a preparation method thereof. The invention belongs to the technical field of light boards. The microbubble magnesia
cement internal / external wallboard comprises the following components in parts by weight: 100 parts of magnesia, 16-50 parts of
magnesium chloride, 2-45 parts of microbubble
foaming agent, 26-75 parts of water, 1-16 parts of
glass fiber cloth, 0.1-0.3 part of non-
woven fabric and 0.2-4 parts of
magnesite modifier. The preparation method comprises the following steps: (1) mixing
magnesium chloride and water, and adding magnesia; (2) adding
fly ash,
sawdust, reclaimed materials and
perlite; (3) adding
magnesite modifier; (4) adding microbubble
foaming agent; (5) putting into a mold to form a bottom layer, laying the
glass fiber cloth layer on the bottom layer, adding
slurry to form a plurality of separation
layers (the
glass fiber cloth layer is laid between every two separation
layers, and the topmost
slurry forms the
surface layer), and finally, extruding with pressure rollers to obtain a blank board; and (6) curing the blank board, sanding and
cutting to obtain the finished product. By adding the
microbubbles, the invention has the advantages of simple method, good product quality, small volume, low cost and the like, and is convenient to process.