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Preparation method for lightweight gypsum-based fireproof door core board

A fire door core board, gypsum-based technology, applied in ceramic products, applications, home appliances and other directions, can solve the problem of halogen return and frost, magnesium oxychloride cement fire door core board moisture absorption, vermiculite fire door core board production process is complex and other problems, to achieve the effect of low comprehensive cost, long fire resistance limit time, and solving complex production process.

Active Publication Date: 2014-03-12
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of a lightweight gypsum-based fireproof door core board, which effectively solves the problems of complex production process of the vermiculite fireproof door core board, moisture absorption, halogen and frost return of the magnesium oxychloride cement fireproof door core board

Method used

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Effect test

Embodiment 1

[0026] The specific embodiment of the preparation method for realizing a kind of lightweight gypsum-based fire door core board of the present invention is:

[0027] 1. First, select raw materials:

[0028] Gypsum: α-hemihydrate gypsum produced by chemical gypsum, its 2h flexural strength is 6.2MPa, 2h compressive strength is 53.0MPa, the initial setting time is 7min, and the water requirement for standard consistency is 37%;

[0029] Cement foaming agent: protein foaming agent, the foaming ratio is 25 times, the settlement distance of the foam in 1 hour is 8mm, and the bleeding volume in 1 hour is 65ml;

[0030] Short fiber: chopped polypropylene fiber;

[0031] Mesh cloth: medium alkali glass fiber mesh cloth;

[0032] Water reducing agent: naphthalene-based water reducing agent;

[0033] Water: tap water;

[0034] 2. After the raw materials are selected, the raw materials of the gypsum-based fire door core board slurry are prepared according to the following weight (%): ...

Embodiment 2

[0047] The specific embodiment of the preparation method for realizing a kind of lightweight gypsum-based fire door core board of the present invention is:

[0048] 1. First, select raw materials:

[0049] Gypsum: α-hemihydrate gypsum produced by natural anhydrite, its 2h flexural strength is 6.1MPa, 2h compressive strength is 52.0MPa, the initial setting time is 8min, and the water requirement for standard consistency is 36%;

[0050] Cement foaming agent: protein foaming agent, foaming multiple 20 times, 1h foam settlement distance: 8mm, 1h bleeding volume 70ml;

[0051] Short fiber: chopped glass fiber;

[0052] Mesh cloth: alkali-resistant glass fiber mesh cloth;

[0053] Water reducer: polycarboxylate water reducer;

[0054] Water: tap water;

[0055] 2. After the raw materials are selected, the raw materials of the gypsum-based fire door core board slurry are prepared according to the following weight (%):

[0056] Gypsum 60;

[0057] Short fiber 0.12;

[0058] Fo...

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Abstract

The invention provides a preparation method for a lightweight gypsum-based fireproof door core board. The preparation method employs alpha-hemihydrate gypsum, a cement foaming agent, a short fiber, gridding cloth and a water reducer as raw materials. The fireproof door core board prepared in the invention has dry density of 300 to 450 kg / m<3>, oven dry compressive strength of no less than 1.0 MPa, oven dry rupture strength of no less than 0.5 MPa and combustion performance according with the fire-resistance rating A1 prescribed in Building Material and Product Combustion Performance Rating GB8624-2006; the preparation method for the fireproof door core board has the advantages of low comprehensive cost, simple production process, environment friendliness and no pollution, enables long fire endurance time of the fireproof door core board to be obtained and effectively overcomes the problems of complex production process for a vermiculite fireproof door core board and moisture absorption and returning of halogen and frost of a magnesium oxychloride cement fireproof door core board.

Description

Technical field: [0001] The invention relates to the technical field of production of a fireproof door core board, in particular to a preparation method of a lightweight gypsum-based fireproof door core board. Background technique: [0002] The fire door is composed of skeleton, door core filling material and fireproof hardware. The filling material of the door core board is the core material of the fire door, and its quality and performance are particularly important. The filling material of the door core board traditionally uses materials such as rock wool, aluminum silicate wool, mineral wool, perlite board, foamed magnesium oxychloride cement board, and foamed cement board. Aluminum silicate wool board, rock wool, slag wool or glass wool fireproof door panels. Although these materials are light in weight and good in heat insulation, they consume a lot of energy in the production process. Pollution, it is difficult to meet environmental protection requirements, and there...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B38/02
Inventor 杨飞华郝利炜吴学谦
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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