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Making method of ultralow-heat-conduction inorganic fireproof heat insulation board

A fire-proof insulation board and inorganic technology, applied in the field of building insulation materials, can solve the problems of incomplete coverage of the foam surface and low compressive strength, and achieve the effects of reduced thermal conductivity, reduced production costs, and reduced bulk density

Active Publication Date: 2014-12-31
LUOYANG DAYU IND +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To produce 200kg / m 3 Foamed concrete with closed cells below and below it also faces the following problems: First, because the foam cell diameter of physical foaming is small (≤0.12mm), while the ordinary Portland cement has large particles, it cannot completely affect the foam surface. Second, the compressive strength of the product is low at ultra-low bulk density

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]The target bulk density of the inorganic fireproof insulation board is 140kg / m 3 , the total mold volume is 0.864m 3 , in order to properly leave a margin during pouring, according to 0.90m 3 Calculated, the total mass of cement, aggregate, fiber and slurry additives required (kg). The proportion selection and dosage of each raw material are: 525 # Cement: 70%, or 78.75kg; Aggregate: 26%, or 29.25kg; Fiber: 2%, or 2.25kg, of which the dosage of fibers with lengths of 12, 9, 6, and 3mm are 0.225, 0.45, 0.675, and 0.9kg in sequence ; Slurry additive: 2%, namely 2.25kg, tap water: 127.29kg.

[0032] The above raw materials are made into inorganic fireproof insulation boards with specifications of 300×300×40mm according to the method described, and the bulk density after drying is 139.6kg / m 3 , the compressive strength is 0.70MPa, and the thermal conductivity is 0.039W / (m·K).

Embodiment 2

[0034] Calculation method, operation steps are the same as embodiment 1, and difference is to use 425 # Cement instead of 525 # cement.

[0035] The bulk density of the obtained inorganic fireproof insulation board after drying is 138.9kg / m 3 , a foam concrete insulation board with a compressive strength of 0.64MPa and a thermal conductivity of 0.038W / (m·K).

Embodiment 3

[0037] The target bulk density of the inorganic fireproof insulation board is 120kg / m 3 , the total mold volume is 0.864m 3 , in order to properly leave a margin during pouring, according to 0.89m 3 Calculated, the total mass of cement, aggregate, fiber and slurry additives required (kg). The proportion selection and dosage of each raw material are: 525 # Cement: 75%, or 71.52kg; Aggregate: 18%, or 17.16kg; Fiber: 3%, or 2.86kg, of which the dosage of fibers with lengths of 12, 9, 6, and 3mm are 0.29, 0.57, 0.86, and 1.14kg in sequence ; Slurry additive: 4%, namely 3.81kg, tap water: 110.89kg.

[0038] The above raw materials are made into inorganic fireproof insulation boards with specifications of 300×300×40mm according to the method described, and the bulk density after drying is 120.5kg / m 3 , the compressive strength is 0.50MPa, and the thermal conductivity is 0.03W / (m·K).

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PUM

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Abstract

A making method of an ultralow-heat-conduction inorganic fireproof heat insulation board comprises the following steps: mixing an additive slurry mixed emulsion with a base material to prepare a concrete slurry, wherein the additive slurry mixed emulsion is prepared through mixing a slurry additive with water, the base material is prepared through using cement, aggregates and fibers, the fibers are inorganic short fibers or polypropylene or polyacrylonitrile fibers having diameters of 30-50mum and lengths of 12mm, 9mm, 6mm and 3mm respectively, and the weight ratio of the polypropylene or polyacrylonitrile fibers having lengths of 12mm, 9mm, 6mm and 3mm is 1:2:3:4; and mixing foams with the concrete slurry to form a foam slurry, pouring the foam slurry to a die, carrying out normal pressure steam curing, de-molding, and cutting to obtain the ultralow-heat-conduction inorganic fireproof heat insulation board. The volume weight of the inorganic fireproof heat insulation board decreases to 120-140kg / m<3>, so cement is saved; and compared with organic foam boards, the inorganic fireproof heat insulation board has the advantages of non-toxicity, non-flammability, long service life, high compressive strength, and substantially reduced heat conduction coefficient.

Description

technical field [0001] The invention relates to the field of building thermal insulation materials, in particular to a preparation method of an ultra-low thermal conductivity inorganic fireproof thermal insulation board. Background technique [0002] Since I used organic foam insulation boards for wall insulation in foreign countries, fires have occurred repeatedly, which have caused huge losses to the lives and property of our people. For this reason, the National Fire Protection Bureau issued a document (65[2011] ), requiring that "organic foam insulation boards be banned". This has injected a strong impetus into the development of foam concrete insulation boards. In 2012, chemically foamed concrete insulation panels became popular all over the country (application numbers 201010607495.6; 201110322030.0; 201110418771.9; 201210082174.8; 201210064021.0; 201210287457.6). Since the production of chemically foamed insulation boards must use high-aluminum or sulfur-aluminum cem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B38/00
Inventor 王利亚赵青山李森兰王建平范军焦珍龙刘宇翔
Owner LUOYANG DAYU IND
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