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Method and device for testing flame retardant property of intumescent fire retardant coating under action of environmental wind

A technology of fire-resistant coatings and flame-retardant properties, applied in the field of fire-resistant coatings, can solve the problems that coatings cannot effectively protect steel structures, etc., and achieve the effect of simple structure, convenient operation, and guaranteed ease of operation

Inactive Publication Date: 2021-09-21
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, Jimenez et al. pointed out that wind turbulence can damage the expanded carbon layer, making the coating unable to effectively protect the steel structure.

Method used

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  • Method and device for testing flame retardant property of intumescent fire retardant coating under action of environmental wind
  • Method and device for testing flame retardant property of intumescent fire retardant coating under action of environmental wind
  • Method and device for testing flame retardant property of intumescent fire retardant coating under action of environmental wind

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Embodiment 1

[0057] A method for testing the flame-retardant properties of intumescent fireproof coatings under the action of ambient wind, comprising the following steps:

[0058] S1. Fix the vertical distance between the sample surface and the lower edge of the heater as a standard distance of 25mm, change the temperature of the heater, and record the heat flux change of the heat flux sensor (the heat flux sensor is set on the sample surface), The functional relationship between the heat flux Q and the temperature of the heater is obtained by fitting:

[0059] Q(x)=1.44+23.56exp((x-605) / 210.79)

[0060] Among them: see Figure 4 , x is the temperature of the heater, in °C;

[0061] S2. Through the wind speed calibration system, measure the air supply speed of the ambient wind system, and fit the functional relationship between the ambient wind speed V and the fan frequency f:

[0062] V(f)=0.153 f-0.2651

[0063] Among them: see Figure 5 , f is the set frequency of the fan, the uni...

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Abstract

The invention provides a method and a device for testing the flame retardant property of an intumescent fire retardant coating under the action of environmental wind, and the method and the device can simulate the fire scene of the intumescent fire retardant coating under the action of environmental wind with different wind speeds and wind directions, and can simultaneously represent the fire retardant property of the coating at the far wind end and the near wind end, so that the method is used for testing the flame retardant property of the fire retardant coating at different positions under special boundary conditions, and has important significance on the practical application research of the intumescent fire retardant coating.

Description

technical field [0001] The invention belongs to the technical field of fireproof coatings, in particular to a method and a device for testing the flame retardancy of intumescent fireproof coatings under the action of ambient wind. Background technique [0002] Fire is the main cause of steel structure building accidents. When a fire occurs in a steel structure building, its strength and stiffness will decrease significantly as the temperature rises rapidly, and eventually the building will collapse. Therefore, it is of great significance to effectively protect the steel structure from the burning of high-temperature flames to avoid the partial and overall collapse of the steel structure building in a fire, causing casualties and difficulties in fire fighting. [0003] Fireproof coatings are the best material for fire protection of steel structures in engineering applications. Intumescent fireproof coatings are widely used in various steel structure buildings due to their adv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/12
CPCG01N31/12
Inventor 王峥阳李玉豪高雨欣吴剑铭张恭昊颜龙范传刚朱德举欧长红
Owner CENT SOUTH UNIV
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