High-water-resistance carbonized consolidated fiber cement board and preparation method thereof

A technology of fiber cement board and fiber, which is applied in the field of high water-resistant carbonized consolidated fiber cement board and its preparation, can solve the problems of expansion damage, high water absorption, delamination of fiber cement board, etc., and achieve excellent mechanical properties and durability, Improve water resistance and mechanical properties, improve the effect of wrapping

Inactive Publication Date: 2022-05-13
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the biggest problem of fiber cement board is the high water absorption rate, which is easy to cause swelling and damage.
In addition, fiber cement boards are prone to delamination, which may be due to unreasonable curing systems. The traditional curing method uses high temperature and high pressure curing, which makes the pressure inside the board rise sharply, which can easily cause delamination of fiber cement boards, affecting The strength and aesthetics of fiber cement board

Method used

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  • High-water-resistance carbonized consolidated fiber cement board and preparation method thereof
  • High-water-resistance carbonized consolidated fiber cement board and preparation method thereof
  • High-water-resistance carbonized consolidated fiber cement board and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0029] The present invention provides a kind of preparation method of high water resistance carbonization consolidation fiber cement board, comprises the following steps:

[0030] Mixing fibers, gelling components and water to obtain slurry; the fibers include wood fibers, glass fibers or polyvinyl alcohol fibers; the gelling components include calcium silicate mineral powder, calcium silicate-rich One or more of mineral phase steel slag powder and magnesium slag powder rich in calcium silicate mineral phase;

[0031] The slurry was sequentially dehydrated, squeezed, and rested in CO 2 Curing under the atmosphere to obtain the high water resistance carbonized consolidated fiber cement board.

[0032] In the present invention, unless otherwise specified, the raw materials used are all commercially available products in this field.

[0033] In the present invention, the glass fibers preferably include glass wool and non-glass wool fibers, the non-glass wool fibers preferably h...

Embodiment 1

[0078] Embodiment 1 (γ-C 2 S)

[0079] The solid components are: γ-C 2 93 parts of S, 3 parts of non-glass wool fiber, 2 parts of glass wool, and 2 parts of wood fiber;

[0080] Preparation:

[0081] Add the weighed non-glass wool fiber, glass wool, wood fiber and 500 parts of water into the stirring device according to the proportion and stir to form a suspension;

[0082] According to the ratio, the weighed gelling component (γ-C 2 S) mixing with the suspension and placing it in a beater, adding water according to a slurry concentration of 12%, stirring for 15 minutes and fully mixing to form a slurry;

[0083] Pour the slurry into a vacuum filtration device, perform suction filtration and dehydration, move the formed slab to a grouting mold, and perform grouting with a pressure of 600kN and a holding time of 60s;

[0084] The slab after grouting is taken out, and placed in a curing box for resting, the resting condition is 40°C, the relative humidity is below 50%, the ...

Embodiment 2

[0087] Embodiment 2 (magnesium slag)

[0088] The solid components are: 93 parts of magnesium slag, 3 parts of non-glass wool fiber, 2 parts of glass wool, and 2 parts of wood fiber;

[0089]The preparation method is the same as in Example 1.

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Abstract

The invention provides a high-water-resistance carbonized and consolidated fiber cement board and a preparation method thereof, and belongs to the field of building materials. Mixing fibers, a gelling component and water to obtain slurry; the fibers are glass fibers and wood fibers or polyvinyl alcohol fibers and wood fibers; the gelling component comprises one or more of calcium silicate mineral powder, steel slag powder rich in calcium silicate mineral phase and magnesium slag powder rich in calcium silicate mineral phase; the slurry is sequentially subjected to dehydration, mud jacking and static curing, curing is conducted in the CO2 atmosphere, and the high-water-resistance carbonization consolidation fiber cement board is obtained. The glass fibers are doped to replace plant wood fibers, and hydrophobic groups on the surfaces of the glass fibers can effectively reduce the water absorption rate of the fiber cement board; the gelling component used in the invention has excellent CO2 reaction activity, can be subjected to mineralization reaction with CO2 to form a matrix structure composed of calcium carbonate, and is a main strength source of the fiber cement board.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high water resistance carbonized consolidated fiber cement board and a preparation method thereof. Background technique [0002] The board made of cement or other cementitious materials as the basic material and adhesive, plant fiber or other fiber as the reinforcing material, and undergoes pulping, molding, curing and other processes is called fiber cement board. The basic physical properties of fiber cement board are superior, and it is mostly used in construction fields such as composite wall panels, external wall insulation boards, partition walls and suspended ceilings. [0003] However, with the widespread use of fiber cement boards, more and more problems are gradually exposed. At present, the biggest problem of fiber cement board is the high water absorption rate, which is easy to cause swelling and damage. In addition, fiber cement boards are prone to dela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/18C04B28/08C04B111/27C04B111/76
CPCC04B28/18C04B28/08C04B28/082C04B2201/20C04B2201/50C04B2111/76C04B2111/27C04B14/42C04B18/26C04B40/0231
Inventor 刘志超谢大民王发洲
Owner WUHAN UNIV OF TECH
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