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A bearing wall board and a method of producing the same

An endurance and slurry technology, which is applied in the field of endurance surface materials, can solve the problems of high specific gravity of endurance surface materials, can not be said to fully improve workability, dimensional changes of endurance surface materials, no improvement in frost resistance or water resistance, etc. Effects of dehydration, low energy cost, superior strength or flexibility

Inactive Publication Date: 2008-07-16
NICHIHA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] However, the specific gravity of the endurance surface material disclosed in Patent Document 1 is still high, so it cannot be said that workability has been sufficiently improved.
In addition, there is no improvement in dimensional change, frost resistance or water resistance of the endurance face material
[0020] In addition, there is no improvement in the dimensional change, frost resistance or water resistance of the bearing surface material disclosed in Patent Document 2

Method used

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  • A bearing wall board and a method of producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Each of the endurance surface materials shown in Examples 1 to 8 and Comparative Examples 1 to 8 was produced under each of the production conditions listed below.

[0059] Example 1, 30 mass % of Portland cement in water, 4 mass % of wood pulp with a freeness of 500 ml beaten by a beater, 6 mass % of wood pulp with a freeness of 780 ml without beating, and 8 mass % of unbeaten waste paper % by mass, 10% by mass of perlite, 42% by mass of blast furnace slag and fly ash for dispersion of raw materials, add stearic acid emulsion solution, which is 0.5% by mass of the total solid content of the slurry. After mixing, let the slurry flow on a dehydration blanket, and form a sheet while being dehydrated. The prepared sheet was laminated in 6 layers with a production roll to form a laminated mat.

[0060] Apply a pressure of 2.5 MPa to the above-mentioned laminated mat, press a high-pressure press for 7 seconds, then steam cure at 70°C, and obtain the endurance surface materi...

Embodiment 2

[0061] Example 2, in the slurry obtained by dispersing the same raw material composition as in Example 1 in water, a stearic acid emulsion solution was added, and the stearic acid emulsion solution was 1.0% by mass of the total solid content of the slurry. After mixing, the endurance surface material is obtained through the same method of making, dehydration, pressing, and curing as in Example 1.

Embodiment 3

[0062] Example 3, in the slurry obtained by dispersing the same raw material composition as in Example 1 in water, a stearic acid emulsion solution was added, and the stearic acid emulsion solution was 2.0% by mass of the total solid content of the slurry. After mixing, the endurance surface material is obtained through the same method of making, dehydration, pressing, and curing as in Example 1.

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Abstract

The present invention provides a bearing wall with a low specific gravity of as low as 1.0 or less and a wall-magnification of 2.5 or more, which is excellent in strength, fire-safety, workability, dimensional stability, freezing resistance, water resistance and earthquake resistance, and a method for manufacturing the board. The board is produced by a method that contains the steps of: preparing a slurry by dispersing a cement-based hydraulic material, a fiber reinforcing material and a lightweight aggregate into water, adding a saturated carboxylic acid to the slurry, and then forming the slurry into a sheet, dehydrating the sheet, pressing the sheet and curing the sheet. The cement-based hydraulic material is contained in an amount of 20 weight% or more, and 60 weight% or less, based on the total solid content; the fiber reinforcing material is contained in an amount of 6 weight% or more, and 20 weight% or less, based on the total solid content; and the lightweight aggregate is contained in an amount of 3 weight% or more, and 18 weight% or less, based on the total solid content; and the saturated carboxylic acid is contained in an amount of 0.1 weight% or more, and 2.0 weight% or less, based on the total solid content. The fiber reinforcing material includes a refined fiber with a freeness of 650 ml or less and an unrefined fiber. The saturated carboxylic acid is a stearic acid-based carboxylic acid or a succinic acid-based carboxylic acid.

Description

technical field [0001] The present invention relates to a method for producing an endurance surface material excellent in strength, fire resistance, workability, dimensional stability, frost resistance, or water resistance. Background technique [0002] Houses are subjected to external forces such as earthquakes and winds, and deform over a long period of time. Therefore, construction materials such as structural walls of ordinary houses use inclined pillars or wood residues to resist external forces such as earthquakes and winds or deformation over a long period of time. More recently, however, instead of slanted struts or wood residue, endurance surface materials have been used. The bearing surface material is arranged so as to close openings formed in a frame made of columns and foundations or beam materials such as beams. In this state, the durability surface material is fixed to the frame by nailing the periphery of the resistance surface material, thereby improving th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B14/38C04B16/06C04B18/24C04B24/08
CPCC04B2111/29C04B2111/2053Y10T428/249932C04B2111/27C04B2111/40E04C2/06C04B28/02Y02W30/91C04B14/06C04B14/108C04B14/12C04B14/18C04B14/20C04B14/202C04B18/08C04B18/082C04B18/105C04B18/141C04B18/26C04B24/04C04B40/006C04B40/0259C04B28/00C04B14/38C04B14/02
Inventor 鹈饲正范
Owner NICHIHA CORP
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