High-temperature-resistant ceramizable cement-based material and preparation method thereof

A cement-based material, ceramic technology, applied in the direction of cement production, etc., can solve the problems of decreased mechanical properties and durability, low fire resistance temperature, and inability to realize multiple fire protection functions

Active Publication Date: 2020-10-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After a fire occurs, the effective fireproof functional components of the fireproof material are consumed, and the mechanical properties and durability drop sharpl

Method used

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  • High-temperature-resistant ceramizable cement-based material and preparation method thereof
  • High-temperature-resistant ceramizable cement-based material and preparation method thereof
  • High-temperature-resistant ceramizable cement-based material and preparation method thereof

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Embodiment 1

[0034]The target ceramic composition of this embodiment is designed so that the molar ratio of natrolite and cesium garnet is 1:9, and the molar ratio of the chemical elements of the precursor and the activator is calculated accordingly: Na / Al=2:11, Cs / Al =9:11, Si / Al=21 / 11, and the ratio of raw materials is selected according to the chemical composition of raw materials to meet the ratio of chemical elements. The specific ratio is as follows:

[0035] The precursor composed of metakaolin and slag and the activator composed of cesium silicate and sodium hydroxide with a weight of 60 kilograms, the chemical element molar ratio formed by the two together complies with the above chemical element ratio. In this embodiment, the specifically selected precursors are 18 kg of metakaolin, 14.3 kg of slag, 1.3 kg of sodium hydroxide and 26.4 kg of cesium silicate as activators. The mass (in kilograms) of the specific elements Na, Si, Al and Cs in the precursor and the activator analyzed...

Embodiment 2

[0046] The target ceramic composition of this embodiment is designed so that the molar ratio of natrolite and cesium garnet is 1:1, and the molar ratio of the chemical elements of the precursor and the activator is calculated accordingly: Na / Al=2:3, Cs / Al =1:3, Si / Al=5:3, and the ratio of raw materials is selected according to the chemical composition of raw materials to meet the ratio of chemical elements. The specific ratio is as follows:

[0047] 68 kilograms of weight are composed of metakaolin, slag precursor and cesium hydroxide, cesium silicate, sodium hydroxide, and the molar ratio of chemical elements formed by the two meets the above-mentioned chemical element ratio; in the present embodiment , the specifically selected precursors are 16.78 kg of metakaolin, 32.66 kg of slag, 6.05 kg of sodium hydroxide, 5.67 kg of cesium hydroxide, and 6.84 kg of cesium silicate as activators. The mass (in kilograms) of the specific elements Na, Si, Al and Cs in the precursor and th...

Embodiment 3

[0058] The target ceramic composition of this embodiment is designed so that the molar ratio of natrolite and cesium garnet is 4:1, and the molar ratio of the chemical elements of the precursor and the activator is calculated accordingly: Na / Al=8:9, Cs / Al =1:9, Si / Al=14:9, and select the ratio of raw materials according to the chemical composition of raw materials to meet the ratio of chemical elements, the specific ratio is as follows:

[0059] A precursor composed of metakaolin, slag, and fly ash and an activator composed of cesium hydroxide, cesium silicate, and sodium hydroxide with a weight of 75 kilograms. The chemical element molar ratio formed by the two meets the above chemical element ratio; In this embodiment, the precursors specifically selected are 15.68 kg of metakaolin, 15.25 kg of slag, 26.92 kg of fly ash, 11.3 kg of sodium hydroxide as activator, 2.65 kg of cesium hydroxide, 3.2 kg of silicon cesium acid. The mass (in kilograms) of the specific elements Na, ...

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Abstract

The invention provides a high-temperature-resistant ceramizable cement-based material and a preparation method thereof. The cement-based material comprises the following components in percentage by weight: 60-75% of a precursor and an excitant, 10-20% of a reinforcing phase and 15-20% of an anti-shrinking agent, wherein the sum of the components is 100%. The high-temperature-resistant ceramizablecement-based material further comprises a water reducing agent accounting for 0.5-2% of the total mass of the precursor, the reinforcing phase, the excitant and the anti-shrinking agent, wherein the precursor is selected from a combination of two or more of metakaolin, slag or fly ash, and the excitant is selected from a combination of two or more of cesium hydroxide, cesium silicate and sodium hydroxide. The high-temperature-resistant ceramizable cement-based material has excellent workability after being mixed with water; the cement concrete has better mechanical properties and durability than common cement concrete after being hardened at normal temperature, can resist the high temperature of 1800 DEG C in case of fire or other high-temperature environments, and has the advantages of improved mechanical properties, hardness and thermal shock resistance, stable volume and no cracks or shrinkage.

Description

technical field [0001] The invention relates to the technical field of engineering fireproof materials, in particular to a high-temperature-resistant ceramizable cement-based material and a preparation method thereof. Background technique [0002] The excellent fire performance of building engineering structures has important practical significance for ensuring the safety of engineering structures, prolonging the service life of engineering structures and improving reliability. Existing building fireproof materials mainly use functional components to make the surface of the material foam and carbonize at high temperature, decompose to release water or non-combustible gas, etc. to achieve fireproof function. Its limitation is that when there is no fire, the mechanical properties, durability, and bonding performance of fireproof materials are usually far lower than those of cement concrete materials, and problems such as shedding and failure often occur. After a fire occurs, ...

Claims

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Application Information

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IPC IPC(8): C04B28/26
CPCC04B28/26C04B2201/50C04B14/106C04B18/141C04B22/062C04B14/042C04B14/383C04B14/46C04B14/041C04B24/24C04B18/08C04B2103/302Y02P40/10
Inventor 陈伟李秋
Owner WUHAN UNIV OF TECH
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