Low-density interior calcium silicate board as well as preparation method and application thereof

A calcium silicate board, low-density technology, applied in covering/lining, construction, building construction, etc., can solve the problems of high plant fiber consumption, low board surface strength, and increased production costs, so as to reduce production costs and reduce The effect of heat consumption and strength improvement

Active Publication Date: 2022-04-29
肇庆三乐集成房屋制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The application number is 201510319908.3, and the Chinese patent titled "a low-density fiber-reinforced calcium silicate fireproof board and its preparation method" increases the content of imported plant fibers in the board (8-12%), and the uncompacted slab Method to prepare a low-density calcium silicate board, but the amount of plant fiber used in this method is significantly higher than the conventional amount (5-7%), resulting in a substantial increase in production costs and low surface strength of the board

Method used

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  • Low-density interior calcium silicate board as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1 Preparation of low-density interior calcium silicate board

[0054] (1) Preparation of hollow silica microspheres:

[0055] ①Using the emulsion method to prepare hollow silica microsphere emulsion, firstly, nano-silica particles with a particle size of 10nm were added to the oil phase (silicone oil) to obtain a nano-silica suspension with a solid content of 20wt%. Thoroughly stir at 60°C to obtain suspension A;

[0056] 2. the suspension A that step 1. is obtained is under the condition of continuous stirring, gradually add the aqueous solution that concentration is the surfactant (sodium lauryl sulfate) of 10wt%, and the addition is 50% ( v / v), and then add sodium hydroxide solution (mass fraction 4%), adjust the pH value of the system to be 13, obtain the pre-reaction emulsion B;

[0057] ③Heat the pre-reaction emulsion B to 200°C and keep it warm for 2 hours to complete the prepolymerization reaction of hollow silica microspheres. After centrifugation an...

Embodiment 2

[0063] Embodiment 2 Preparation of low-density interior calcium silicate board

[0064] (1) Preparation of hollow silica microspheres:

[0065] ①Using the emulsion method to prepare the hollow silica microsphere emulsion, first adding nano-silica particles with a particle size of 50nm into the oil phase (cyclohexane) to obtain a nano-silica suspension with a solid content of 35wt%, And fully stirred at 60°C to obtain suspension A;

[0066] 2. the suspension A that step 1. is obtained is under the condition of continuous stirring, gradually adds the aqueous solution that concentration is the surfactant (polyethylene glycol monolaurate) of 10wt%, and the add-on is oily phase (cyclohexane) volume 50% (v / v), and then add sodium hydroxide solution (mass fraction 8%), adjust the pH value of the system to be 13, obtain pre-reaction emulsion B;

[0067] ③Heat the pre-reaction emulsion B to 200°C and keep it warm for 2 hours to complete the prepolymerization reaction of hollow silica...

Embodiment 3

[0073] Embodiment 3 Preparation of low-density interior calcium silicate board

[0074] (1) Preparation of hollow silica microspheres:

[0075] ①Use the emulsion method to prepare the hollow silica microsphere emulsion. First, add nano-silica particles with a particle size of 100nm to the oil phase (mixture of silicone oil, cyclohexane and kerosene, and the mass ratio is methyl silicone oil:cyclohexane : kerosene=5:3:2), to obtain a nano-silica suspension with a solid content of 50wt%, and fully stir it at 60°C to obtain a suspension A;

[0076] 2. With the suspension A obtained in step 1. under the condition of continuous stirring, gradually add the aqueous solution with a concentration of 10wt% surfactant (polyoxyethylene lauryl ether), and the addition amount is 50% of the volume of the oil phase (cyclohexane) (v / v), and then add sodium hydroxide solution (mass fraction 12%), adjust the pH value of the system to 13, obtain the pre-reaction emulsion B;

[0077] ③Heat the p...

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Abstract

The invention discloses a low-density interior calcium silicate board as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing hollow silicon dioxide microspheres by an emulsion method; (2) mixing the hollow silicon dioxide microspheres, a siliceous material, a calcareous material, cement and plant fibers to prepare mixed blank forming slurry with the solid content of 10-15wt%; and (3) forming the mixed blank forming slurry on a net to prepare a wet plate blank, carrying out plate compaction treatment on the wet plate blank under the compaction pressure of not less than 23 MPa, and carrying out autoclaved curing to obtain a formed plate, namely the low-density interior calcium silicate plate. The hollow silicon dioxide microspheres are added in the preparation process of the calcium silicate board, it can be ensured that a large number of hollow gaps still exist in the board after the board is compacted, the density of the board can be flexibly adjusted, and the application range of the calcium silicate board can be expanded.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a low-density interior calcium silicate board and its preparation method and application. Background technique [0002] Calcium silicate board is a new type of building and decorative board with calcium and siliceous materials as the continuous phase and plant fibers, chemical fibers or glass fibers as the reinforcement phase. Its preparation process mainly includes processes such as flow slurry / hanging net forming, slab compaction, pre-curing, autoclaving curing, sanding and trimming. Calcium silicate board has the advantages of high strength, low wet expansion rate, low thermal conductivity, good fire resistance, non-toxic and harmless, etc. It is an inorganic board with great development potential. At present, medium and high density calcium silicate boards (950~1400kg / m 3 ) production and application in exterior walls has been very common, but it has problems such as heavy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/06E04F13/14C04B111/28C04B111/76
CPCC04B28/04C04B14/062E04F13/14C04B2201/50C04B2235/77C04B2201/20C04B2111/28C04B2111/76C04B18/26C04B14/06C04B22/064C04B18/241C04B18/248Y02W30/91
Inventor 王阳李建新
Owner 肇庆三乐集成房屋制造有限公司
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