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Ardealite type fireproof sizing for tunnel

A technology of phosphogypsum and gypsum, applied in the field of fireproof materials, can solve problems such as poor fire resistance

Inactive Publication Date: 2018-08-10
ZHENGZHOU SUNDY BUILDING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vitrified microbeads are generally used in the field of external wall insulation. Vitrified microbead insulation mortar is used as the insulation layer, which has certain heat insulation, fire prevention and sound absorption properties, and its fire resistance is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: Use a mixture of semi-aqueous and anhydrous type III gypsum with a mass percentage of 60%, and anhydrous type II gypsum with a mass percentage of 25%. The above are all calcined phosphogypsum powders, and the balance is Impurities, mix them and add water to make a fireproof slurry suitable for spraying in a sprayer, and spray a coating with a thickness of 25-35mm on the inner wall of the tunnel. Through experiments, the fire-resistant slurry of the present invention has a flame-retardant and fire-resistant time of up to 4 hours at 1100°C.

Embodiment 2

[0012] In the second embodiment, a mixture of semi-aqueous and anhydrous type III gypsum with a mass percentage of 10% is selected. The mass percentage of anhydrous type II gypsum is not less than 80% (including impurities), because in the calcination of phosphogypsum, impurities It is mixed in the gypsum powder with the progress of calcination, and it is difficult to separate from the gypsum powder; mix it and stir, add water to make a fireproof slurry suitable for spraying in a spraying machine, and spray a coating with a thickness of 25-35mm on the inner wall of the tunnel. The characteristics of the layer are low early strength, long solidification time, slow hydration speed, good water resistance and fire resistance, and high softening coefficient. Through experiments, the fire-resistant slurry of the present invention has a flame-retardant and fire-resistant time of up to 4 hours at 1100°C.

Embodiment 3

[0013] The third embodiment is to select a mixture of semi-aqueous and anhydrous type III gypsum with a mass percentage of 30%, and anhydrous type II gypsum with a mass percentage of 20%. The above are all calcined powders of phosphogypsum. The mass percentage is Perlite powder with a content of 45%, the remainder is impurities. After mixing it, add water to make a fireproof slurry suitable for spraying in a spraying machine. Spray a coating with a thickness of 25mm on the inner wall of the tunnel. Through experiments, the fire-resistant slurry of the present invention has a flame-retardant and fire-resistant time of up to 4 hours at 1100°C.

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Abstract

The invention provides an ardealite type fireproof sizing for a tunnel. The ardealite type fireproof sizing for the tunnel comprises a mixture of 5-70% by mass of semi-hydrated gypsum and anhydrous III type gypsum, 20-80% by mass of anhydrous III type gypsum, and the balance of impurities; the mixture of semi-hydrated gypsum and anhydrous III type gypsum is the mixture of anhydrous III type gypsumproduced by roasting ardealite under the temperature of 200-360 DEG C, and semi-hydrated gypsum produced under the temperature of 130-200 DEG C. According to the ardealite type fireproof sizing for the tunnel, the ardealite mixing material is used in the fireproof sizing of the tunnel, and harmful materials are not doped, so that the sizing is environmentally friendly, meets the environmental protection requirement, and is high in fireproofing resistance.

Description

Technical field [0001] The invention belongs to the field of fireproof materials, and particularly relates to a fireproof slurry for phosphogypsum tunnels. Background technique [0002] As a special material, tunnel fireproof materials should not only have the decorative function of ordinary materials and provide physical protection to the cable substrate, but also have the function of flame retardancy and fire resistance. The existing tunnel fireproof materials mainly include fireproof paint, fireproof slurry and fireproof board. The thickness of the fireproof paint is not easy to control during construction. When the coating is too thin, the fireproof performance is not good and the specified fireproof performance cannot be achieved. When the coating is too thick, the coating is easy to crack; due to its insufficient strength and poor bonding performance, the fireproof slurry generally needs to be coated with a thicker slurry, which is easy to crack and fall off. Fireproof boa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B111/28
CPCC04B28/143C04B2111/00551C04B2111/00724C04B2111/28C04B22/143C04B14/365C04B14/18C04B14/24C04B14/202
Inventor 赵嘉珩赵建纲
Owner ZHENGZHOU SUNDY BUILDING TECH