Cast-in-situ fireproof and heat-insulating material for sandwich wall, and preparation method and application thereof

Abstract

The invention provides a cast-in-situ fireproof and heat-insulating material for a sandwich wall. The cast-in-situ fireproof and heat-insulating material comprises a component A and a component B, andUPF in the component A is used as a main foaming material, and is modified with remaining materials; fumed SiO2 increases the viscosity of the UPF, improves the bonding strength, reduces the heat conduction coefficient of the heat-insulating material, enhances the strength and the hardness of the material and absorbs harmful volatiles of the UPF resin, so the material meets the requirements of greenness and energy saving; polyethylene glycol improves the toughness and the strength of the heat-insulating material, so the foamed heat-insulating material has the possibility of cast-in-situ construction; sodium bicarbonate and sodium lauryl sulfate in the component B are a composite foaming agent, and promote the mixed foaming of the components A and B; and the two components are mixed and foamed to obtain the fireproof and heat-insulating material with the advantages of high strength, good fireproof and heat-insulating performance, low heat conduction coefficient and seamless continuouscasting. The heat-insulating material makes a heat-insulating layer cast in situ, and the compressive strength can meet the strength requirement of a load-bearing plate, so the heat-insulating plate has a broad application prospect.

Description

technical field [0001] The invention belongs to the field of construction, and in particular relates to a sandwich wall reflective pouring fireproof and thermal insulation material, its preparation method and application. Background technique [0002] Prefabricated buildings are buildings assembled from prefabricated parts on site. According to the form and construction method of prefabricated components, it is divided into block building, plate building, box building, skeleton plate building and upgraded building. A large number of building parts of prefabricated buildings are produced and processed by workshops. Compared with traditional buildings, prefabricated buildings have many advantages such as fast installation speed, water saving, land saving, noise reduction, and material saving. They meet the requirements of green buildings and are widely used by people. s concern. [0003] At present, the sandwich insulation wall in the prior art has the following serious tech...

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Problems solved by technology

[0003] At present, the sandwich insulation wall in the prior art has the following serious technical problems: 1. When the prefabricated concrete sandwich wall is produced in the prefabricated building PC factory, the preformed insulation board can only be laid between the outer and inner leaf walls production method; the insulation layer of the sandwich insulation wall in the prior art is difficult to realize cast-in-place due to the limitation of materials, and the preformed insulation board requires high paving process requirements and complicated processes during the process of sandwich wall forming, and the heat preservation Layers are easy to move, assembly accuracy is difficult to control, assembly efficiency is low, and it is easy to cause engineering hidden dangers, which greatly limits the healthy development of prefabricated buildings; Foam materials including PU resin, PF resin, UF resin, and foamed cement cannot meet the requirements of thermal insulation materials due to their low strength and fragility.

The strength of the insulation layer obtained by these foaming materials in the prior art is below 0.25 MPa, and its strength cannot meet the requirements of the load-bearing insulation board at all. Therefore, even if the existing materials can be used as cast-in-place insulation materials, the obtained sandwich insulation wall The body will also not be able to be used as a load-bearing wall due to its low strength

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