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A kind of high density calcium silicate board and preparation method thereof

A calcium silicate board and densification technology, applied in the field of high-density calcium silicate board and its preparation, can solve the problems of restricting the popularization and application of calcium silicate board, high porosity of calcium silicate board, increasing production cost, etc. The drying process, the preparation method are simple, and the porosity is low.

Active Publication Date: 2020-01-03
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the calcium silicate board prepared by the wet method has a high porosity (between 20-30%) and a low density. During the later painting process, a large amount of paint needs to be consumed, which not only wastes resources but also improves production. The cost seriously restricts the popularization and application of calcium silicate board

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A high-density calcium silicate board is prepared from the following raw materials in parts by weight: 10 parts of bentonite, 0.5 parts of modifier, 150 parts of cement, 250 parts of fly ash, 10 parts of silica fume and 4 parts of fiber.

[0036] As mentioned, the modifier is prepared from cetyltrimethylammonium bromide, cetyltrimethylammonium chloride and hydrochloric acid in a weight ratio of 1.5:1:0.8.

[0037] Said bentonite is sodium bentonite, its fineness is 1-5% of the sieve residue passed through a 500-mesh sieve, and its water absorption rate is 400-460%.

[0038] As mentioned above, the fly ash is Class I fly ash of Class F, and its strength activity index is 75-85%.

[0039] As mentioned, the specific surface area of ​​silica fume is 1.8×10 4 -2.6×10 4 m 2 / kg.

[0040] Said, the fiber is wood fiber or glass fiber, and its size is 2-7mm.

[0041] A method for preparing a high-density calcium silicate board is prepared by the following steps:

[0042] 1...

Embodiment 2

[0051] A high-density calcium silicate board is prepared from the following raw materials in parts by weight: 13 parts of bentonite, 0.3 parts of modifier, 180 parts of cement, 230 parts of fly ash, 15 parts of silica fume, and 2.5 parts of fiber.

[0052] As mentioned, the modifier is prepared from cetyltrimethylammonium bromide, cetyltrimethylammonium chloride and hydrochloric acid in a weight ratio of 2:1:0.5.

[0053] Said bentonite is sodium bentonite, its fineness is 1-5% of the sieve residue passed through a 500-mesh sieve, and its water absorption rate is 400-460%.

[0054] As mentioned above, the fly ash is Class I fly ash of Class F, and its strength activity index is 75-85%.

[0055] As mentioned, the specific surface area of ​​silica fume is 1.8×10 4 -2.6×10 4 m 2 / kg.

[0056] Said, the fiber is wood fiber or glass fiber, and its size is 2-7mm.

[0057] A method for preparing a high-density calcium silicate board is prepared by the following steps:

[0058]1...

Embodiment 3

[0067] A high-density calcium silicate board is prepared from the following raw materials in parts by weight: 15 parts of bentonite, 0.1 part of modifier, 200 parts of cement, 200 parts of fly ash, 20 parts of silica fume, and 1.5 parts of fiber.

[0068] As mentioned, the modifier is prepared from cetyltrimethylammonium bromide, cetyltrimethylammonium chloride and hydrochloric acid in a weight ratio of 2.5:1:0.3.

[0069] Said bentonite is sodium bentonite, its fineness is 1-5% of the sieve residue passed through a 500-mesh sieve, and its water absorption rate is 400-460%.

[0070] As mentioned above, the fly ash is Class I fly ash of Class F, and its strength activity index is 75-85%.

[0071] As mentioned, the specific surface area of ​​silica fume is 1.8×10 4 -2.6×10 4 m 2 / kg.

[0072] Said, the fiber is wood fiber or glass fiber, and its size is 2-7mm.

[0073] A method for preparing a high-density calcium silicate board is prepared by the following steps:

[0074]...

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Abstract

The invention discloses a high-density calcium silicate plate and a preparation method thereof. The high-density calcium silicate plate is prepared from the following raw materials in parts by weight:10 to 15 parts of bentonite, 0.1 to 0.5 part of a modifying agent, 150 to 200 parts of cement, 200 to 250 parts of coal ash, 10 to 20 parts of silica fume and 1.5 to 4 parts of fibres. The calcium silicate plate disclosed by the invention is low in porosity and high in density; the paint using amount is reduced by 40 to 50 percent, so that the cost is remarkably reduced. The preparation method disclosed by the invention is simple; various materials are uniformly mixed under the condition of low water-cement ratio under the action of the modifying agent; the high-density calcium silicate plateis prepared through adsorption-release of water in the bentonite and the conversion of the water in an alkaline environment; after the high-density calcium silicate plate is cured through steam, freewater does not exist, and the density is high; meanwhile, a drying treatment process in a conventional calcium silicate plate production process is reduced, and the manufacturing flow is shortened.

Description

technical field [0001] The invention relates to the technical field of building material production, in particular to a high-density calcium silicate board and a preparation method thereof. Background technique [0002] At present, new building environmental protection materials with light weight, high strength and energy saving are the development direction of the building materials industry. Calcium silicate board is made of loose short fibers such as inorganic mineral fibers or cellulose fibers as reinforcement materials, and siliceous-calcium materials are used as the main cementing material. After pulping and molding, the curing reaction is accelerated in high-temperature and high-pressure saturated steam. The plate made of calcium silicate gel is a new type of building and industrial plate with excellent performance. [0003] The existing calcium silicate board mainly uses silicate-calcium materials such as Portland cement and ultrafine quartz sand and wood pulp fiber...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B20/02
Inventor 程新李来波芦令超赵丕琪王海英
Owner UNIV OF JINAN