| abstract |
The invention relates to a crack-resistant gypsum-based lightweight material. Its raw materials, calculated in parts by mass, include the following components: 100 parts of building gypsum, 75-95 parts of water, 45-65 parts of vitrified microbeads, and polyvinyl alcohol. 0.3-0.6 part of fiber, 8-15 part of rubber particles, 0.2-0.6 part of silane coupling agent, 0.2-0.6 part of adhesive, 0.2-0.6 part of water retention agent, 0.2-0.6 part of water reducing agent and 0.2-0.6 part of retarder. In the present invention, rubber particles, vitrified microbeads and gypsum cementing materials with different particle sizes are filled step by step according to a certain mass ratio. The coordination improves the compatibility between multiple phases. Further combined with other auxiliary components to interact, a gypsum-based lightweight material with low dry density, excellent resistance to deformation and damage and good thermal insulation performance is obtained. |