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Cement flakeboard and production process thereof

A particleboard and cement technology, applied in the field of building boards and their preparation, can solve the problems of high board shrinkage, easy breaking of slabs, slow hydration speed, etc., and achieve the effect of reducing costs

Inactive Publication Date: 2008-02-06
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The calcium oxide content of the fly ash used in it is relatively low. If high calcium fly ash containing more than 15% calcium oxide is used in this patented formula, the early strength of the slab may be low, and the slab is easy to break when the slab is unloaded.
[0005] High-calcium fly ash, because it contains more than 15% calcium oxide, has a slow hydration rate and volume expansion after hydration, which easily leads to high shrinkage of the board at room temperature and reduces the strength of the board, thus seriously affecting the high-calcium fly ash. Utilization of fly ash in cement particle board

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Prepare materials according to the following weight ratio:

[0038] Poplar wood shavings (moisture content 30%) 32.5kg

[0039] High calcium fly ash (calcium oxide content 35%) 40kg

[0040] Cement 30kg

[0041] Sodium silicate liquid (mass percentage concentration 30%) 4.67kg

[0042] Calcium chloride liquid (mass percentage concentration 30%) 4.67kg

[0043] Triethanolamine 0.14kg

[0044] The particle size is 30-60mm long, 1-6mm wide and 0.3-0.8mm thick.

[0045] 2) Spray sodium silicate liquid, calcium chloride liquid and triethanolamine to the shavings and stir evenly, then add cement, high-calcium fly ash and water and mix well, and control the total weight of water in the mixture with high-calcium pulverized coal The ratio of the weight sum of ash and cement is 0.5:1;

[0046] 3) Use the paving machine to make the mixture into slabs, stack the slabs, pressurize and lock the slabs through a cold press at room temperature, and the pressure is 3.7MPa;

[0...

Embodiment 2

[0058] 1) Prepare materials according to the following weight ratio:

[0059] Poplar wood shavings (moisture content 30%) 32.5kg

[0060] High calcium fly ash (calcium oxide content 30%) 30kg

[0061] Cement 40kg

[0062] Sodium silicate liquid (mass percentage concentration 30%) 7kg

[0063] Calcium chloride liquid (mass percentage concentration 30%) 4.67kg

[0064] Sodium sulfate liquid (mass percentage concentration 30%) 2.6kg

[0065]Triethanolamine 0.14kg

[0066] Poplar shavings are 30-100mm long, 4-6mm wide and 0.4-0.7mm thick.

[0067] 2) Spray sodium silicate liquid, calcium chloride liquid, sodium sulfate liquid and triethanolamine additive to the shavings and stir evenly, then add cement, high calcium fly ash and water and mix well, and control the total amount of water in the mixture The ratio of the weight to the sum of the weight of high calcium fly ash and cement is 0.55:1;

[0068] 3) Use the paving machine to make the mixture into slabs, stack the slabs...

Embodiment 3

[0080] 1) Prepare materials according to the following weight ratio:

[0081] Salix shavings (moisture content 30%) 26kg

[0082] High calcium fly ash (calcium oxide content 15%) 23kg

[0083] Cement 52kg

[0084] Sodium silicate liquid (mass percentage concentration 30%) 6.25kg

[0085] Calcium chloride liquid (mass percentage concentration 30%) 5kg

[0086] Gypsum 1.2kg

[0087] Triethanolamine 0.21kg

[0088] Salix shavings are 10-30 mm long, 1-4 mm wide, and 0.4-1.0 mm thick.

[0089] 2) Spray sodium silicate liquid, calcium chloride liquid and triethanolamine on the shavings and stir evenly, then add cement, high-calcium fly ash, quick gypsum and water and mix well, and control the total weight of water in the mixture to match the high-calcium The ratio of the weight sum of fly ash and cement is 0.45:1;

[0090] 3) Use the paving machine to make the mixture into slabs, stack the slabs, pressurize and lock the slabs through a cold press at room temperature, and the ...

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Abstract

The present invention provides a cement particle board and the manufacturing method thereof; the cement particle board comprises the weight percentage compositions of raw materials: 15 to 35 percent of wood wool (absolute dry wood wool), 15 to 45 percent of high-calcium fly ash, 30 to 55 percent of cement, 1 to 3 percent of sodium silicate, 0.3 to 1.8 percent of calcium chloride and 0.1 to 2 percent of addition agent. The method of the present invention uses high-calcium fly ash of industrial wastes, frutex or lops wood shavings for manufacture of hard board, thereby reaching the 'Cement Xylolite Slab (JC / T411-1991)' standard and saving production cost, reducing environmental pollution, expanding, at the same time, the range of wood raw materials for particle board production and creating higher economic value.

Description

technical field [0001] The invention relates to a building board using fly ash and a preparation method thereof, in particular to a particleboard using fly ash and a production method thereof. Background technique [0002] Cement particleboard has been widely used abroad as interior and exterior wall panels, partition panels, floors, sound barrier materials on both sides of railways or roads, etc., and its domestic application is gradually expanding. This kind of board is generally made of cement, wood shavings, fly ash and various additives. The board has high strength, good fire and flame retardancy, and good water resistance and sound insulation performance. However, in order to ensure the physical and mechanical properties such as the strength of the cement particle board, it is usually required that the calcium content of the fly ash is low, and the calcium oxide content is generally lower than 8%. [0003] CN 1861347A discloses a lightweight cement particleboard and i...

Claims

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Application Information

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IPC IPC(8): B28C7/06B28B1/52B28B11/24
CPCC04B2111/28C04B2111/27C04B2111/52C04B28/02Y02W30/91C04B12/04C04B18/08C04B18/26C04B22/064C04B22/124C04B22/143C04B22/147C04B24/122C04B24/18C04B40/024
Inventor 龙玲
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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