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Production process and formula of fiber reinforced cement board based on square stock cutting method

A technology of fiber reinforcement and production process, which is applied in the field of production technology and formulation of fiber reinforced cement board, can solve the problems of fast expansion at the edge of fiber reinforced cement board, broken edge of fiber cement board, and reduced quality of fiber cement board, etc. Achieve the effect of reducing the loss of water and cement hydration heat, avoiding shrinkage and deformation, and avoiding product cracking

Pending Publication Date: 2022-07-22
宏瑾建筑科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) After the fiber-reinforced cement board is formed, it is necessary to steam-cure the fiber-reinforced cement board to strengthen the strength of the fiber-reinforced cement board, but the existing high-temperature curing method needs to be equipped with high-temperature curing and drying equipment for high-temperature curing, and the equipment cost is high
[0006] 2) The fiber-reinforced cement board made into a single plate through the pressing process, during the steam curing process of the fiber-reinforced cement board, the edge of the fiber-reinforced cement board is suspended, and the edge of the fiber-reinforced cement board expands quickly, which is easy to cause Fragmentation at the edges of the fiber cement board reduces the quality of the fiber cement board
This process produces fiber reinforced cement boards. During high temperature curing, it is necessary to configure high temperature curing drying equipment for high temperature curing, and the cost of equipment is high; during the steam curing process of fiber reinforced cement boards, the edges of fiber reinforced cement The edge of the cement board expands quickly, which easily causes the edge of the fiber cement board to break, reducing the quality of the fiber cement board
When the plate is cut, it is easy to cause the plate to crack

Method used

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  • Production process and formula of fiber reinforced cement board based on square stock cutting method
  • Production process and formula of fiber reinforced cement board based on square stock cutting method
  • Production process and formula of fiber reinforced cement board based on square stock cutting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This embodiment provides a fiber-reinforced cement board, which includes, in parts by weight, 180 parts of water, 590.45 parts of cement, 45.2 parts of high ground, 410.66 parts of heavy calcium powder, 1219 parts of calcium carbonate sand, 28 parts of fiber, and a water reducer. 6 parts, 1 part of defoamer, and 0.4 part of retarder, among which, the volume of cement slurry other than calcium carbonate sand and fibers accounts for 52%.

[0048] Among them, the cement is the cement with the grade of 42.5 or higher. The median particle size D50 of the high territory is between 600 mesh and 5000 mesh. The median particle size D50 of heavy calcium powder is between 200 mesh and 5000 mesh. The particle size range of the calcium carbonate sand is 4 meshes to 100 meshes. The fiber is one of polypropylene fiber, copolyformaldehyde fiber, ultra-high molecular weight polyethylene fiber, and polyvinyl alcohol fiber. The water reducing agent is a polycarboxylate water reducing a...

Embodiment 2

[0060] This embodiment provides a fiber-reinforced cement board, which includes, in parts by weight, 190 parts of water, 610.10 parts of cement, 42.3 parts of high ground, 350 parts of heavy calcium powder, 1155.56 parts of calcium carbonate sand, 18 parts of polypropylene fibers, 8 parts of water agent, 2 parts of defoamer, 0.6 part of retarder.

[0061] Among them, the cement is the cement with the grade of 42.5 or higher. The median particle size D50 of the high territory is between 2000 mesh and 4000 mesh. The median particle size D50 of heavy calcium powder is between 300 mesh and 1500 mesh. The median particle size D50 of calcium carbonate sand is between 40 mesh and 100 mesh. The fibers are in co-polyacetal fibers. The water reducing agent is a polycarboxylate water reducing agent. The defoamer is a silicone defoamer, and the retarder is sodium gluconate.

[0062] The above production process is the same as that of Example 1.

Embodiment 3

[0064] This embodiment provides a fiber-reinforced cement board, which includes, in parts by weight, 210 parts of water, 580.86 parts of cement, 55 parts of high ground, 434.77 parts of heavy calcium powder, 1273.28 parts of calcium carbonate sand, 12 parts of polypropylene fibers, 10 parts of water agent, 3 parts of defoamer, 0.3 part of retarder.

[0065] The specifications of the above raw materials are the same as in Example 1, and the production process is the same.

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Abstract

The invention discloses a production process and formula of a fiber-reinforced cement board based on a square stock cutting method, the fiber-reinforced cement board is obtained by adopting the square stock cutting method, namely, a large square stock is prepared through a set process, and the square stock is cut into regular boards after cement hydration shrinkage is completed and the square stock is cooled, so that the fiber-reinforced cement board is obtained. And the obtained board is small in later shrinkage, so that the problem of shrinkage deformation of the fiber reinforced cement board is avoided. The stirred mixture is poured into the material frame, the material frame is covered with the heat preservation cover, so that the mixture is located in a closed space, and high-temperature curing is conducted through heat generated by cement hydration; no extra high-temperature curing and drying equipment is needed for high-temperature curing, so that the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of cement products, and in particular relates to a production process and formula of a fiber-reinforced cement board based on a square material cutting method. Background technique [0002] Fiber reinforced cement board is a board made of cement as the basic material and gelling agent, with mineral fiber cement and other fibers as reinforcement materials, through pulping, curing, molding and other processes, and is widely used for its superior performance. All areas of the construction industry. [0003] The strength of this sheet is high. Lightweight, non-combustible material with fire rating A1. Fiber reinforced cement board has the advantages of fireproof, soundproof, waterproof and moistureproof. The installation of this fiber reinforced cement board is completely dry operation, the construction is simple and convenient, and labor is saved. The typical specification of fiber reinforced cement board is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/52B28B11/14B28B11/24B28C5/00C04B14/10C04B14/28C04B28/00
CPCB28B1/525B28B11/245B28B11/14B28C5/003C04B28/00C04B14/106C04B14/28C04B2201/50C04B2103/302C04B2103/50C04B2103/22C04B16/0633C04B16/0675C04B16/0625C04B16/0641
Inventor 不公告发明人
Owner 宏瑾建筑科技(上海)有限公司
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