Gypsum-based thermal insulation material for interior walls and preparation method thereof

Abstract

The invention discloses a gypsum-based thermal insulation material for interior walls. The gypsum-based thermal insulation material is composed of the following ingredients, by weight, 50-70 parts of water, 18-25 parts of meerschaum, 5-10 parts of glazed hollow bead, 3-8 parts of aluminum silicate wool, 2-5 parts of gypsum and 0.2-0.8 part of cellulose ether. A preparation method of the gypsum-based thermal insulation material comprises the following steps: the above ingredients are weighed according to the above weight ratio; carrying out dry mixing on meerschaum, glazed hollow bead, aluminum silicate wool and cellulose ether in advance to an uniform state; adding weighed water and mixing; and stirring for later use. Before construction, weighed gypsum is added and uniformly stirred for use. The material provided by the invention has advantages of fire prevention and flame retardation, low dry density, high strength, good thermal insulation effect and low dry shrinkage, is convenient to operate during construction, has good adaptation to base walls, and has a wide market prospect.

Description

Technical field [0001] The invention belongs to the technical field of building materials, and specifically relates to a special heat preservation material for inner walls and a preparation method thereof. Background technique [0002] External wall internal insulation is an important thermal insulation method in the field of building thermal insulation. Especially in existing old buildings, there are currently a large number of old urban buildings in my country that have not adopted wall insulation measures. Due to energy-saving requirements, the entire building is often required The external thermal insulation renovation construction of the external wall. Due to the safety of scaffolding and construction, the opinions of the owners are often inconsistent. Coupled with technical obstacles such as the treatment of old walls, a large number of rural houses almost have no wall insulation measures. In these areas, compared with the external thermal insulation renovation project, the...

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Problems solved by technology

The panel system has high requirements on the wall surface. If there are potholes and uneven surfaces on the wall surface, it needs to be leveled first, which is time-consuming, labor-intensive and material-intensive.

The board system is very unfavorable to the secondary decoration of the interior, it is easy to cause damage, and it is not easy to repair, which affects the appearance and thermal insulation effect

In particular, there are still fire hazards in the organic board insulation system.

The currently used mortar insulation system is mainly cement-based vitrified bead inorganic insulation mortar, which has a large dry density, basically 400-600kg / m 3 The thermal conductivity is basically between 0.080-0.120 W / m.K, and the drying shrinkage rate is large, which is easy to cause cracks on the wall surface, and the phenomenon of alkali return is very easy to occur in the humid air, which affects the appearance and thermal insulation effect