Heat insulation board capable of blocking hot and cold bridge, and preparation method thereof

Abstract

The invention relates to the field of building materials, and particularly relates to a heat insulation board capable of blocking hot and cold bridge, and a preparation method thereof. At present, heat insulation materials used for outer walls are not ideal. The technical solution adopted by the invention is as follows: raw materials comprise, by weight, 40-45 parts of cement, 8-35 parts of redispersible rubber powder, 0.1-0.5 parts of cellulosic fiber, 10-15 parts of polyphenyl particles, 20-25 parts of fly ash, 5-10 parts of defoaming stone, 1-5 parts of light calcium carbonate, 1-5 parts of heavy calcium carbonate, 10-15 parts of a heat insulation material and 20-50 parts of expanded glass beads. The raw materials are distributed for three times and shaped in one time. The heat insulation board has the following beneficial effects of good flame retardant performance, incombustiblity, good heat insulation effect, good cohesiveness and high strength. Due to the board shape, the heat insulation board is convenient for construction and use, is reasonable in price, has the same service life with buildings, is suitable for being used by outer wall surfaces of various buildings, and has good economic benefits and social benefits.

Description

Technical field: [0001] The invention relates to the field of building materials, in particular to a thermal insulation board capable of blocking thermal and cold bridges and a preparation method thereof. Background technique: [0002] Wall insulation is a necessary measure for building energy saving and consumption reduction. At present, the insulation materials used for external walls are not ideal, especially in the fields of energy saving, environmental protection, fire prevention, and heat preservation. They cannot fully meet various needs. Most of the current insulation materials Generally, the thermal conductivity is large, the thermal insulation and fire resistance are poor, and there are inconveniences that the construction operation is not easy. [0003] At present, the commonly used thermal insulation systems of building envelopes use polystyrene foam boards, thermal insulation mortar, polyurethane rigid foam, glass wool, rock wool and other thermal insulation mat...

AI Technical Summary

Problems solved by technology

The shortcoming of this prior art is: 1, directly used sodium silicate aqueous solution and organosilicon water-repellent in the formula of prior art, these two kinds of raw materials are all very dilute aqueous solutions. After mixing and stirring with perlite etc. The moisture content is relatively large, so that the temperature requirement of the drying and dehydration stage after molding is higher, and the drying time is also longer, which increases the cost of the product

2. Sodium silicate and organic silicon water repellent are highly alkaline materials, which make the product highly alkaline. As the outer layer of the building insulation system, it is easy to get damp and return to alkali, which affects the appearance of the outer wall. At the same time, it is easy to rust the steel wire protection net on the outer layer. The glass fiber net will age and lose its reinforcing effect.

3. Sodium silicate aqueous solution is used as a binder, and the water resistance after film formation is poor, and it is easy to deliquescence and water seepage, which affects the strength and weather resistance of the product

4. Expanded perlite is used as the main thermal insulation material. Due to the expansion of ore sand during vaporization and crystal water overflow, perlite has an open-pore particle structure, which is easily crushed and formed into powder. The strength is very low, which reduces the strength of the product. It is easy to absorb water vapor, and the insulation performance of the product will be greatly reduced after moisture absorption

5. During the mixing process of preparing the product, since the perlite is easily broken to form powder, the mixing time should not be too long, but the mixing time is too short, which will cause the glue and perlite to not be fully mixed, and there will be a considerable amount of perlite surface that is not Can be fully wrapped by glue, thus affecting the strength of the product, easy to break and break

6. A layer of glass fiber mesh is adhered to the surface of the insulation plate. Single-sided glass fiber mesh cannot completely guarantee that the product will not be broken or damaged, because the external force causing the fracture is uncertain.