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Fiber cement board and preparation method thereof

A technology of fiber cement board and wood fiber, which is applied in the field of building materials, can solve problems such as poor strength, waste, and peculiar smell, and achieve the effects of good heat preservation and flame retardancy, excellent waterproof performance, high strength and mechanical properties

Inactive Publication Date: 2021-06-08
湖南艺建装配式建筑有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing fiber cement board generally only uses wood chips as fibers, which has poor strength, poor waterproof performance, peculiar smell, which is not conducive to people's health, and the discarded fiber cement board cannot be recycled, causing unnecessary waste and construction waste.

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0026] The present invention also provides a kind of preparation method of fiber cement board, comprises the steps:

[0027] Step S1, dispersing wood fibers and glass fibers, and grinding them into fiber pulp for later use;

[0028] Step S2, mixing Portland cement, diatomaceous earth, fly ash, expanded perlite, light calcium powder, and potassium chloride, and adding part of water to the mixture for stirring;

[0029] Step S3, adding the fiber pulp in step S1 to the mixed slurry in step S2, adding inorganic aluminum salt water repellent, sodium lignosulfonate, 2-methyl-2-pentanol and the rest of the water, stirring evenly to obtain a mixture pulp;

[0030] Step S4, importing the mixed slurry in step S3 into a mold for extrusion molding, demoulding and cutting, putting the formed cement board into an autoclave, and curing it at 160-180°C and 3-5Mpa for 18-24 hours, Get a fiber cement board.

Embodiment 1

[0033] A fiber cement board, comprising the following components in parts by weight:

[0034] Portland cement 120 parts, diatomite 40 parts, fly ash 12 parts, expanded perlite 20 parts, wood fiber 25 parts, glass fiber 20 parts, light calcium powder 15 parts, potassium chloride 8 parts, inorganic aluminum 5 parts of salt water repellent, 5 parts of sodium lignosulfonate, 25 parts of 2-methyl-2-pentanol, 150 parts of water.

[0035] Wherein, the bulk density of the expanded perlite is 100kg / m 3 ;

[0036] The fiber length of the wood fiber is 1-2mm, and the bulk density is 20g / cm 3 ;

[0037] The fiber length of the glass fiber is 3-5mm.

Embodiment 2

[0039] A fiber cement board, comprising the following components in parts by weight:

[0040] Portland cement 100 parts, diatomite 30 parts, fly ash 10 parts, expanded perlite 15 parts, wood fiber 20 parts, glass fiber 15 parts, light calcium powder 10 parts, potassium chloride 5 parts, inorganic aluminum 3 parts of salt water repellent, 3 parts of sodium lignosulfonate, 20 parts of 2-methyl-2-pentanol, 120 parts of water.

[0041] Wherein, the bulk density of the expanded perlite is 100kg / m 3 ;

[0042] The fiber length of the wood fiber is 1-2mm, and the bulk density is 20g / cm 3 ;

[0043] The fiber length of the glass fiber is 3-5mm.

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Abstract

The invention discloses a fiber cement board. The fiber cement board is prepared from the following ingredients in parts by weight: 100 to 120 parts of Portland cement, 30 to 40 parts of barbadoes earth, 10 to 12 parts of coal ash, 15 to 20 parts of expanded perlite, 20 to 25 parts of wood fibers, 15 to 20 parts of glass fibers, 10 to 15 parts of light calcium powder, 5 to 8 parts of potassium chloride, 3 to 5 parts of an inorganic aluminum salt waterproof agent, 3 to 5 parts of sodium lignin sulfonate, 20 to 25 parts of 2-methyl-2-pentanol and 120 to 150 parts of water. The fiber cement board provided by the invention has the characteristics of high strength, good waterproof and fireproof performance and the like.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a fiber cement board and a preparation method thereof. Background technique [0002] Fiber cement board is a building material made of cement as the basic material, combined with natural fibers and auxiliary materials, after a certain production process, pressure, steam curing and other special technical treatments. In foreign countries, this material is usually used for exterior wall cladding of commercial or civil buildings. Fiber cement board is a hybrid material made of sand, cement and plant fibers. At present, the appearance types of this material include horizontal cross type, wood grain type, parapet type, egg-shaped surface type and so on. Fiber cement boards are block styles and can be used for attic partitions, wall linings, door / eave siding or as subfloors for bathroom tiles. It can be used not only for exterior wall cladding, but also as a fireproof boa...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B14/08C04B18/08C04B14/185C04B18/26C04B14/42C04B14/28C04B22/124C04B2103/65C04B24/18C04B24/02
Inventor 易富宗
Owner 湖南艺建装配式建筑有限公司