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Ultrathin expansive type fireproof steel material

An intumescent, fire-resistant steel technology, applied in the direction of fire-resistant coatings, coatings, etc., can solve problems such as structural damage, reduced bearing capacity of steel structures, and sensitivity

Inactive Publication Date: 2015-06-10
QINGDAO PINGDU JIUDIAN GOLD MINE
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, one of the biggest problems faced by steel structure buildings is that their physical and mechanical properties are very sensitive to high temperature. Once a fire occurs, the bearing capacity of the steel structure will decrease, the deformation will increase, and it may reach the limit state or even in a short period of time. Structural damage occurs

Method used

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Embodiment Construction

[0010] An ultra-thin intumescent fireproof steel material is characterized in that ordinary carbon structural steel is sprayed with 2.5mm ultrathin fireproof paint to form the ultrathin intumescent fireproof steel material of the present invention. The main components of the fireproof coating are: base material phenolic 70% + acid source ammonium polyphosphate 2% + carbon source pentaerythritol 5% + inorganic filler talc powder 15% + reinforcing material aluminum silicate fiber + additives defoaming agent, dispersant and component Film agent 8%.

[0011] Derust the surface of ordinary carbon structural steel materials, apply a layer of iron red primer, and wait for the primer to dry before proceeding.

[0012] Ordinary carbon steel structure is the common Q195, the chemical composition is: C ≤0.1%, Mn ≤0.50%, Si ≤0.30%, S ≤0.040%, P ≤0.035%, and the rest is Fe. The specifications of steel bars are: length x diameter x thickness 50mm x 10mm x 2mm.

[0013] Stir and mix the fi...

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Abstract

The invention discloses a preparation method of an ultrathin expansive type fireproof steel material. The technical scheme is as follows: a 2.5mm thick ultrathin fireproof coating is sprayed on common carbon structure steel to form the ultrathin expansive type fireproof steel material disclosed in the invention. A spraying method is adopted, wherein sprayed coating is required to be uniform, the thickness of the coating is automatically controlled, and the coating is sprayed twice, 1.25 thick for each time. The interval between the first spraying and the second spraying is 6 h, and the requirement of the second spraying is the same as that of the first spraying. The covering amount of wet spraying is more than or equal to 500 g / m<2>. The ultrathin expansive type fireproof steel material has the following characteristics: the ultrathin expansive type fireproof steel material is developed by taking macromolecule resin as a base material, assisted by components such as a foaming agent, a foaming promoter and a carbon source to form an expansive system, and mixing the expansive system with various fillings, reinforcing ingredients and auxiliary agent to form a mixture.

Description

technical field [0001] The invention discloses a method for preparing an ultra-thin intumescent fireproof steel material, in particular to a resin-based ultrathin intumescent fireproof steel material. Background technique [0002] As a commonly used material for buildings, steel has been widely used in engineering practice due to its many outstanding advantages such as high strength, light weight, good seismic performance and high reliability. However, the fire resistance of steel is poor. When the temperature is 400 ℃, the yield strength of steel will drop to half of the strength at normal temperature. When the temperature reaches 600 °C, the steel will basically lose all its strength and rigidity. Therefore, one of the biggest problems faced by steel structure buildings is that their physical and mechanical properties are very sensitive to high temperature. Once a fire occurs, the bearing capacity of the steel structure will decrease, the deformation will increase, and it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D161/06C09D5/18C09D7/12
CPCC09D161/06C08K3/34C08K5/053C08K7/10C08K2003/323C09D5/185C09D7/61C09D7/63
Inventor 马文超
Owner QINGDAO PINGDU JIUDIAN GOLD MINE
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