Fireproof foam concrete door core plate and preparation method thereof

Abstract

The invention relates to a fireproof foam concrete door core plate and a preparation method thereof. A foam concrete base plate of the door core plate is prepared from cement paste and foam used for concrete in a volume ratio of 1:(5-12); the cement paste comprises the following raw materials in part: 80 to 100 parts of Portland cement, 10 to 30 parts of filling material, 30 to 50 parts of water, 2 to 7 parts of EVA emulsion, 2 to 6 parts of waterproof agent, 0.5 to 1.0 part of water repellent, 1.5 to 2.5 parts of water reducing agent, and 1 to 3 parts of early strength agent; and the volume weight of the foam used for the concrete is 70g / L to 90g / L, and the foam is prepared by adding water into a high-quality foaming agent for foaming. The fireproof foam concrete door core plate has the advantages of light weight, high strength, low heat conductivity coefficient, good fireproof and waterproof performance, long service life and the like, the preparation process is simple, and the cost is low.

Description

technical field [0001] The invention relates to a fireproof filling material, in particular to a fireproof foam concrete door core board and a preparation method thereof. Background technique [0002] With my country's requirements for building a resource-saving society and the successive introduction of national energy-saving and consumption-reducing policies, energy-saving and fire-resistant inorganic door core board materials are bound to become the development direction of new door core materials in the future. At present, the main materials for making inorganic fire door core boards in the market are vitrified microbeads made of magnesite, rock wool boards, ceramsite insulation boards, and perlite insulation boards. Although magnesite foam door core board is low in cost, easy to produce and form, fireproof and waterproof, its performance index is better than traditional fireproof materials (aluminum silicate, rock wool) after testing by the National Fireproof Building ...

AI Technical Summary

Problems solved by technology

Although magnesite foam door core board is low in cost, easy to produce and form, fireproof and waterproof, its performance index is better than traditional fireproof materials (aluminum silicate, rock wool) after testing by the National Fireproof Building Materials Quality Inspection Center, but magnesite The product itself has defects such as deformation, brine return, and decreased hardness, and it is severely corrosive to the iron sheet, which reduces the service life of the door and cannot be eradicated.

Vitrified microbeads: thermal conductivity is less than 0.085, advantages: fireproof, flame retardant, overcome the shortcomings of expanded perlite such as high water absorption and easy pulverization; disadvantages: relatively low strength, high water absorption, general heat preservation effect

Slate board: thermal conductivity 0.041~0.045, advantages: fireproof, flame retardant; disadvantages: high hygroscopicity, poor heat preservation effect, and contains toxic substances such as formaldehyde and phenol

Ceramsite insulation board: thermal conductivity: 0.08~0.10, advantages: fireproof, non-combustible, non-absorbent, convenient construction, durable use; disadvantages The material itself is expensive

Perlite thermal insulation mortar: thermal conductivity 0.07~0.09, advantages: good fire resistance, high temperature resistance; disadvantages: poor thermal insulation effect, high water absorption

However, because foamed concrete contains a large number of closed cells, and the raw materials are mainly powder and fine particles, it shows a high water absorption rate in performance, which seriously affects its production and use; and the strength of foamed concrete increases with the introduction of foam. The resulting porosity increases and decreases, the more foam is introduced, the greater the porosity, the smaller the bulk density, the more obvious its light weight, thermal insulation, and sound insulation performance, but the greater the decline in strength, so the characteristics of foam concrete It is at the cost of reduced strength; in addition, when the foam concrete slurry is formed, it is easy to produce bleeding, segregation, delamination, bubbling and even mold collapse

[0004] All in all, the currently used foam concrete has disadvantages such as low strength, large dry shrinkage, and high water absorption. If ordinary foam cement is to be used in the production of door core panels, its formula and production process need to be greatly improved.