Test piece for testing normal stress between intumescent fireproof coatings and substrate and use method of test piece
A kind of technology of fireproof coating and expansion type, which is applied in the field of normal stress test pieces, can solve the problems of increased fire risk, less expansion type fireproof coating and substrate, insufficient adhesion between coating and substrate, etc., to achieve operation The effect of convenient process
Pending Publication Date: 2019-06-18
HUAQIAO UNIVERSITY
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Problems solved by technology
Insufficient adhesion between the coating and the base material is prone to fall off during the fire process, the fire resistance of structural components decreases, and the fire risk increases. This problem has not yet been paid attention to and resolved by the industry.
At present, the testing methods of normal stress between layers of fire retardant coatings in engineering mainly focus on the research of thick-coated fire retardant coatings, and there are few relevant materials on the bonding force between intumescent fire retardant coatings and substrates
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Embodiment Construction
[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0022] A normal stress test piece for testing intumescent fireproof coating and base material and its application method, refer to figure 1 To 4, the normal stress test piece for testing the intumescent fireproof coating and the substrate includes a substrate steel plate 1, a steel bracket 5, an electronic dynamometer, and a certain shape cut out from the substrate steel plate 1. Steel block 2; the substrate steel plate 1 has a through opening with a certain shape formed by cutting the steel block 2; the steel block 2 is placed in the through opening; a bottom surface of the steel block 2 is fixed A steel bar 3 is connected; in this embodiment, the steel bar 3 is welded on the steel plate. The two ends of the steel bar 3 extend outward until the two ends of the steel bar 3 abut against the bottom surface of the base steel plate 1 respectively, ...
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The present invention provides a test piece for testing the normal stress between intumescent fireproof coatings and a substrate and a use method of the test piece. The test piece comprises a substrate steel plate, a steel support, an electronic force gauge, and a steel block which is cut from the substrate steel plate and has a certain shape; a through opening which has a certain shape and is formed due to the cutting of the steel block is formed in the substrate steel plate; the steel block is arranged in the through opening; a steel strip is fixedly connected to a bottom surface of the steel block; two ends of the steel strip extend outwardly so as to abut against the bottom surface of the substrate steel sheet; the middle portion of the steel strip is connected with a pull ring; the steel bracket has an abutting steel surface; a bottom surface of the abutting steel surface is provided with a plurality of supporting steel columns; the substrate steel plate and one side of the steelblock which faces a direction opposite to the steel strip, are coated with intumescent fireproof coatings; and the substrate steel plate is arranged on the steel bracket. With the test piece and the use method thereof of the invention adopted, the maximum normal stress between the intumescent fireproof coatings and the substrate steel plate can be measured with simple operation.
Description
technical field [0001] The invention relates to the field of civil engineering, in particular to a normal stress test piece for testing an intumescent fireproof coating and a base material and a method for using the same. Background technique [0002] Intumescent steel structure fireproof coating has been widely used in steel structure fireproof engineering because of its advantages of simple construction, light weight, good decoration and not limited by the geometric shape of steel members. Different from traditional fireproof protection materials, intumescent steel structure fireproof coating reacts under the high temperature of fire, and forms a loose and porous carbonaceous layer after the reaction, which plays the role of protecting the base material. The bonding strength between the carbon layer and the base material determines whether the coating adheres to the base material intact after expansion to protect the base material. Insufficient adhesion between the coatin...
Claims
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IPC IPC(8): G01N19/04G01N1/44
Inventor 王玲玲张茜茜霍静思
Owner HUAQIAO UNIVERSITY