Anti-cracking gypsum-based plastering mortar and preparation method thereof

Abstract

The invention relates to anti-cracking gypsum-based plastering mortar. Raw materials comprise, by mass, 100 parts of building gypsum, 35 to 45 parts of water, 0.1 to 0.3 part of polypropylene fibers,0.1 to 0.3 part of glass fibers, 0.2 to 0.6 part of a silane coupling agent, 0.2 to 0.6 part of an adhesive, 0.2 to 0.6 part of a water retaining agent, 0.2 to 0.6 part of a water reducing agent and 0.2 to 0.6 part of a retarder. According to the gypsum-based plastering mortar disclosed by the invention, the advantages of the polypropylene fibers and the glass fibers are fully exerted to complement each other, and the fibers with different elasticity moduli have an excellent synergistic effect; the auxiliary agents are added to improve the dispersity of the fibers, thereby enhancing the fiberbridging action in the stress state, further enhancing the toughening and crack arresting effects of the matrix, enhancing the fracture deformation and reducing the relative cracking index.

Description

technical field [0001] The invention belongs to the field of building gypsum-based thermal insulation materials, and relates to a crack-resistant gypsum-based plaster mortar and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy in recent years, the urbanization process has also been accelerated. More and more cities are undergoing large-scale construction, and a large number of buildings have sprung up in cities all over the world. On the one hand, these buildings have brought prosperity to the urban construction industry, the real estate industry, and the entire social economy; of sustainable development. Moreover, my country's building energy consumption accounts for more than 30% of the terminal energy consumption of the whole society. With the improvement of people's living standards, this proportion will gradually increase. [0003] Facing the severe situation of energy shortage in our country, the governmen...

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Problems solved by technology

However, the fibers currently used in gypsum-based cementitious materials are all in the form of single blending, and a few are mixed in the way, but it is difficult to give full play to the complementary advantages of different types of fibers and the interaction between different types of fibers, resulting in increased The crack resistance effect is in the bottleneck period

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