Ultra-light grade-A fire-resistant thermal insulation material and preparation method thereof

Abstract

The invention relates to the technical field of building thermal insulation or industrial thermal insulation, in particular to an ultralight grade-A fireproof thermal insulation material which comprises a component A and a component B. The component A comprises high-activity magnesium oxide, a water repellent and water. The component B comprises a curing agent, a physical foaming agent, a thickening agent, calcium chloride and water. The preparation method of the ultra-light grade-A fire-resistant thermal insulation material comprises the following steps of: preparing component A slurry, preparing component B liquid, and preparing the fire-resistant thermal insulation material. The reaction time of the high-activity magnesium oxide and the curing agent is short, the reaction can be completed within 10-20s, and the foam wrapped in the high-activity magnesium oxide and the curing agent can be quickly shaped, so that a novel fire-resistant thermal insulation material with the dry density of 50kg / m<3> can be prepared, the heat conductivity coefficient of the novel fire-resistant thermal insulation material is below 0.040 W / (m.K), and the thermal performance of the novel fire-resistant thermal insulation material is much better than that of various common foam cement grade-A thermal insulation materials in the market.

Description

technical field [0001] The invention relates to the technical field of building heat preservation or industrial heat preservation, in particular to an ultra-light class A refractory heat preservation material and a preparation method thereof. Background technique [0002] Traditional A-grade insulation materials used in the field of building insulation are generally prepared by introducing physical foaming or chemical foaming into different gelling systems, such as sulfoaluminate cement, Portland cement or magnesite cement. Foamed cement materials, but the minimum dry density of insulation materials prepared by this system can reach 180kg / m³. Even if the formula is optimized or a small amount of organic lightweight aggregate such as EPS particles is added, the dry density is still difficult to be less than 150kg / m³. If you want to continue to reduce the dry density of the material, you can only reduce the proportion of cementitious material, increase the proportion of foamin...

AI Technical Summary

Problems solved by technology

[0002] Traditional A-grade insulation materials used in the field of building insulation are generally prepared by introducing physical foaming or chemical foaming into different gelling systems, such as those prepared by using sulphoaluminate cement, Portland cement or magnesite cement. Foamed cement materials, but the minimum dry density of insulation materials prepared by this system can reach 180kg / m³. Even if the formula is optimized or a small amount of organic lightweight aggregate such as EPS particles is added, the dry density is still difficult to be less than 150kg / m³

If you want to continue to reduce the dry density of the material, you can only reduce the proportion of cementitious material, increase the proportion of foaming agent or continue to increase the proportion of organic light aggregate such as EPS particles, but this traditional preparation process will cause mold collapse or reduce the material Therefore, the dry density of building insulation materials such as foamed cement boards in the construction market is basically above 150kg / m³

[0003] Another example is a Chinese patent with the authorization number CN103449772B disclosing a thermal insulation material and a preparation method thereof, including the following raw materials: turpentine rock vitrified microspheres, light magnesium oxide, sodium fluorosilicate, aluminum dihydrogen phosphate, polyvinyl alcohol, Kaolin, fly ash, attapulgite, sepiolite fiber, sodium sulfosuccinate and cement, light magnesium oxide itself has low activity and is generally difficult to dissolve in water. It is used as a filler to reduce the dry density of the material. Accelerators are used to promote the hydration reaction process of cement. Rosin rock vitrified microbeads are light aggregates and light magnesium oxide is light fillers, which can reduce the dry density of materials, but the dry density of the obtained insulation materials can only be Reach less than 500kg / m³, thermal conductivity less than 0.085 W / (m K), fire performance meets national A2 requirements