Geopolymer heat protection material, and preparation method and spraying process thereof

A thermal protection material and geopolymer technology, applied in building construction, cement production, construction, etc., can solve the problems of inability to meet the fire protection requirements of large building structures, unsuitable spray construction technology, and unfavorable large-area construction, etc. The effect of reducing adverse effects, realizing efficient utilization, and improving construction efficiency

Inactive Publication Date: 2018-03-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing geopolymer-based thermal protection material mortar has the following defects: (1) In addition to geopolymers, a large amount of organic polymers are added as cementitious materials, and the material will deteriorate significantly at high temperatures; Construction technology, slow construction speed, not conducive to large-scale construction; (3) The material has high viscosity, lacks fluidity, and at the same time, the rheology changes quickly, and the working time is short, so it is not suitable for spraying construction technology
In summary, the existing patents cannot meet the fire protection needs of large building structures such as bridges and tunnels

Method used

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  • Geopolymer heat protection material, and preparation method and spraying process thereof

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Comparison scheme
Effect test

Embodiment 1

[0034] The composition of a geopolymer thermal protection material includes metakaolin, water glass, water, sodium hydroxide, titanium dioxide, glycerol, fine sand, aluminum hydroxide, and boric acid. The mass ratio of the components of the mixture is: metakaolin: fly ash: water glass (modulus Ms=1.56): glycerol: titanium dioxide: fine sand: aluminum hydroxide: boric acid=1.00:0.30:1.40:0.40: 0.12:4.80:0.40:0.02. The particle size of the metakaolin and fly ash is not greater than 0.5mm. The protective layer thickness of sprayed geopolymer mortar is about 10mm.

[0035] The spraying process of above-mentioned geopolymer thermal protection material comprises the following steps:

[0036] 1) Use a water gun to flush the spray surface to remove surface impurities, so that the spray material and the sprayed surface have reliable adhesion;

[0037] 2) provide the fresh mixture of geopolymer thermal protection material that can be used for spraying, and the preparation process of ...

Embodiment 2

[0046] The composition of a geopolymer thermal protection material includes: metakaolin, water glass, water, sodium hydroxide, titanium dioxide, glycerin, fine sand, aluminum hydroxide, and boric acid. The mass ratio of the components of the mixture is: metakaolin: fly ash: water glass (modulus Ms=1.56): glycerol: titanium dioxide: fine sand: aluminum hydroxide: boric acid=1.00:0.25:1.50:0.30: 0.15:4.80:0.40:0.05. The particle size of the metakaolin and fly ash is not greater than 0.5mm. The protective layer thickness of sprayed geopolymer mortar is about 25mm.

[0047] The spraying process of above-mentioned geopolymer thermal protection material comprises the following steps:

[0048] 1) Use a water gun to flush the sprayed surface to remove surface impurities, so that the sprayed material and the sprayed surface have reliable adhesion;

[0049] 2) provide the fresh mixture of geopolymer thermal protection materials that can be used for spraying, and the preparation proce...

Embodiment 3

[0059] The composition of a geopolymer thermal protection material includes: metakaolin, water glass, water, sodium hydroxide, titanium dioxide, glycerin, fine sand, aluminum hydroxide, and boric acid. The mass ratio of the components of the mixture is: metakaolin: fly ash: water glass (modulus Ms=1.56): glycerol: titanium dioxide: fine sand: aluminum hydroxide: boric acid=1.00:0.35:1.57:0.23: 0.12:4.80:0.40:0.08. The particle size of the metakaolin and fly ash is not greater than 0.5mm. The protective layer thickness of sprayed geopolymer mortar is about 50mm.

[0060] The spraying process of above-mentioned geopolymer thermal protection material comprises the following steps:

[0061] 3) Use a water gun to flush the spray surface to remove surface impurities, so that the spray material and the spray surface have reliable adhesion;

[0062] 4) provide the geopolymer thermal protection material fresh mixture that can be used for spraying, and described fresh mixture prepara...

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Abstract

The invention discloses a geopolymer heat protection material, which is prepared from the following components: 100 parts of metakaolin, 20 to 35 parts of coal ash, 136 to 157 parts of sodium silicate, 23 to 40 parts of glycerol, 12 to 20 parts of titanium dioxide, 465 to 480 parts of fine sand, 37 to 45 parts of aluminium hydroxide, and 5 to 10 parts of boric acid, wherein the modulus of the sodium silicate is 1.0 to 1.8. The invention also discloses a preparation method of the geopolymer heat protection material. The technical scheme provided by the invention has the characteristics of simplicity in use, quickness and continuity in construction, high applicability, capability of realizing high-efficient utilization of the material, and the like, and can be widely applied to a fire protection project and special projects. According to a spraying process, an existing steel structure or a reinforced concrete structure can be insulated in a high temperature condition, and the adverse effects of the high temperature on the structure are reduced.

Description

technical field [0001] The invention belongs to the technical field of protective building materials, and in particular relates to a geopolymer thermal protective material, a preparation method and a spraying process thereof. Background technique [0002] The destruction of building structures in fire may cause inestimable life injuries and property losses. The loss of structural bearing capacity at high temperatures is the main cause of structural fire damage. Using thermal protection materials to seal and protect the main load-bearing structure can effectively improve the high temperature resistance and fire damage resistance of the building structure, and improve the safety of the building. Geopolymer material is a new type of inorganic gelling material, which is composed of AlO 4 and SiO 4 Formed by polymerization of tetrahedral monomers, this material has excellent mechanical properties, acid and alkali resistance, and more importantly, it has extremely strong high te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00E04F21/08C04B111/26C04B111/28
CPCC04B28/006C04B2111/00155C04B2111/26C04B2111/28E04F21/08C04B14/106C04B18/08C04B12/04C04B24/026C04B14/305C04B14/06C04B14/303C04B22/0013C04B22/062Y02P40/10
Inventor 闫东明陈士堃敖禹刘毅
Owner ZHEJIANG UNIV
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