Novel light-weight porous heat-insulating material and preparation method thereof

Abstract

The invention discloses a novel light-weight porous heat-insulating material and a preparation method thereof. The novel light-weight porous heat-insulating material is characterized by being prepared by mixing composites, namely coal ash, alkali-activators, foam stabilizers, and the like, then adding a foaming agent, uniformly stirring, introducing into a mould, standing, maintaining and then cutting for forming; the components, namely the coal ash, the alkali-activators, the foam stabilizers, and the like and the mass ratio are as follows in parts by mass: 90.0-120.0 parts of coal ash, 45.0-85.0 parts of water glass, 2.0-8.0 parts of calcium oxide, 5.0-10.0 parts of methyl cellulose, 1.0-2.0 parts of calcium stearate, 0.5-2.0 parts of polypropylene fibers, 1.0-3.0 parts of water-reducing agents, 0.9-2.4 parts of silicone oil and 15.0-25.0 parts of the foaming agents. The novel light-weight porous heat-insulating material disclosed by the invention takes the industrial waste coal ash as a main raw material and is low in carbon, economic, conserved in energy, reduced in emission, fireproof, preserved in heat, light in weight and high in strength. Compared with the traditional material, the novel light-weight porous heat-insulating material disclosed by the invention has the advantages of low cost, high compressive strength, good hole structure, low water absorption and the like, prevents the high cost and high energy consumption of the alkali-activated kaoline porous material and prevents the cracking and high water absorption of an ordinary silicon cement foam material; the novel light-weight porous heat-insulating material can be widely applied to the heat preservation of a wall body, the decoration of a suspended ceiling and a fire-barrier belt.

Description

technical field [0001] The invention belongs to the technical field of building heat preservation, and can be used for wall heat preservation of general buildings, and the architectural design forms a heat preservation, heat insulation, fire prevention and sound insulation structural system. Background technique [0002] With the continuous acceleration of my country's urbanization process, the continuous increase of the total number of buildings and the improvement of living comfort, the energy consumption of buildings has increased year by year. tons of standard coal. At present, my country's annual new building area is nearly 2 billion square meters, of which more than 80% are high-energy buildings; existing buildings are nearly 40 billion square meters, and more than 95% are high-energy buildings; the energy consumption per unit building area is 2 times that of developed countries. to more than 3 times. Thermal insulation technology of building envelope is very important...

AI Technical Summary

Problems solved by technology

[0004] (1) Organic insulation materials: the typical representative is polystyrene foam insulation board (XPS), and its market share is gradually decreasing. Its main advantages are small apparent density, small thermal conductivity and good sound insulation effect, but poor thermal stability, flammable and The release of toxic gases, such as the CCTV fire, the Shanghai fire and other accidents are related to flammable insulation materials

[0005] (2) Inorganic thermal insulation materials: typical representatives are rock wool or foamed cement thermal insulation materials, which have a small market share. The main advantages are non-toxic and harmless, good fire resistance, good weather resistance, and cheap price, but they have high thermal conductivity and good thermal insulation effect. Poor, high water absorption, heavy quality, difficult to construct

[0006] (3) Modified thermal insulation materials: typical representatives of modified phenolic or rigid polyurethane foam, the market share is increasing year by year, the main advantages are low density, small thermal conductivity, low water absorption, slightly improved fire resistance, but poor thermal stability , the combustion test volume is deformed and even produces molten droplets, and it is easy to release toxic gas (CO), which is not conducive to popularization

After searching, the patent 201110132112.9 introduced the resin sealing material or metal foil covering the inorganic foam material profile filled with dry air, but the overall weather resistance of the material is poor, and the elastic modulus of the coating layer is different from that of the internal material, which leads to falling off and cracking , the cost of resin and metal foil is high, the energy consumption is large, and the product is not suitable for mass promotion

Patent 201110188540.3 introduces that the organic core material is covered with a layer of inorganic material to improve the fireproof performance of the organic material, but the difference between the elastic modulus of the organic material and the inorganic material is large, causing the interface to split and fall off, the organic material is easy to age, and the inorganic layer is easy to crack. The problem of uneven bubbles makes the production line process complicated

Patent 201110063191.2 introduces the modified polystyrene particle insulation material. Although the insulation performance is improved compared with the inorganic insulation material, the flame retardant grade of the product is B1, and the combustion test is still prone to produce toxic smoke. gender issues