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Internal and external hydrophobic xonotlite type calcium silicate board as well as manufacturing method and application thereof

A kind of tombstone and calcium silicate board technology, applied in the direction of heat preservation, fire prevention, building components, etc., can solve the problems of weakened waterproof effect, weakened heat preservation effect, freezing damage, etc., so as to improve the waterproof effect and avoid the change of strength and heat preservation effect. poor effect

Pending Publication Date: 2022-07-15
LAIZHOU MINGGUANG THERMAL INSULATION MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many interior wall insulation buildings in Europe and the United States that use calcium silicate boards, while most of the buildings in my country are exterior wall insulation. The main reason for restricting the walls of calcium silicate boards is that the material itself has a microporous structure and is easy to absorb water. can not be used
Once the board absorbs water, the thermal insulation effect will be greatly weakened, and the temperature will be lower than 0 ℃ and it will cause freezing damage
[0005] At present, the production process of waterproof calcium silicate boards on the market is to paint waterproof materials on the surface of the boards, but this production method only makes the surface of the boards waterproof, and the interior of the insulation material still has strong water absorption. Once the surface is waterproof Layer damage will weaken or lose the waterproof effect

Method used

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  • Internal and external hydrophobic xonotlite type calcium silicate board as well as manufacturing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for making a tobermorite type calcium silicate board with internal and external water repellency, the specific steps are:

[0030] (1) Prepare quartz powder with a silica content of 98% and a 400-mesh sieve balance of no more than 5%; prepare slaked lime powder with a calcium hydroxide content of 90% and a 325-mesh sieve balance of no more than 5%.

[0031] (2) Mix quartz powder and slaked lime powder in water according to the molar ratio of silicon atom to calcium atom 1:1 and stir evenly.

[0032] (3) The uniformly mixed raw materials are injected into the dynamic synthesis reactor, and high-temperature steam is introduced to make the temperature in the reactor reach 220 ° C and the pressure to reach 1.8 MPa, and then keep the temperature and pressure for 6 hours to obtain the tombstone crystal as the main component. slurry.

[0033] (4) Adding 3% of the total mass of the tobermorite slurry obtained in the step (3) to the glass fiber, then adding the oily si...

Embodiment 2

[0036] A method for making a tobermorite type calcium silicate board with internal and external water repellency, the specific steps are:

[0037] (1) Prepare silica fume with a silica content of 98% and a 400-mesh sieve balance of no more than 5%; prepare slaked lime powder with a calcium hydroxide content of 90% and a 325-mesh sieve balance of no more than 5%.

[0038] (2) Mix quartz powder and slaked lime powder in water according to the molar ratio of silicon atom to calcium atom 0.9:1 and stir evenly.

[0039] (3) The uniformly mixed raw materials are injected into the dynamic synthesis reaction kettle, and high-temperature steam is introduced to make the temperature in the reaction kettle reach 250 ° C and the pressure to reach 2.3 MPa, and then keep the temperature and pressure for 4 hours, so that the main component is tombstone crystals. slurry.

[0040] (4) adding the tombstone slurry obtained in step (3) into polyester fibers accounting for 4% of the total mass, th...

Embodiment 3

[0043] A method for making a tobermorite type calcium silicate board with internal and external water repellency, the specific steps are:

[0044] (1) Prepare rice husk ash with a silica content of 98% and a 400-mesh sieve balance of no more than 5%; prepare slaked lime powder with a calcium hydroxide content of 90% and a 325-mesh sieve balance of no more than 5%.

[0045] (2) Mix quartz powder and slaked lime powder in water according to the molar ratio of silicon atom to calcium atom 1.1:1 and stir evenly.

[0046] (3) The uniformly mixed raw materials are injected into the dynamic synthesis reactor, and high-temperature steam is introduced to make the temperature in the reactor reach 200 ° C and the pressure to reach 1.6 MPa, and then keep the temperature and pressure for 12 hours to obtain tombstone crystals as the main component. slurry.

[0047] (4) Adding 1% of the total mass of carbon fiber to the tombstone slurry obtained in step (3), then adding 5% of the total mass...

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Abstract

The invention discloses a xonotlite type calcium silicate board with hydrophobic inside and outside as well as a manufacturing method and application thereof. The manufacturing method comprises the following steps: 1) mixing a siliceous material and a calcareous material in water, and uniformly stirring; wherein the molar ratio of silicon atoms to calcium atoms in the siliceous material and the calcium material is 1: (0.8-1.2); (2) injecting the uniformly mixed raw material slurry into a dynamic synthesis reaction kettle, introducing high-temperature steam to enable the temperature in the reaction kettle to reach 180-250 DEG C and the pressure to reach 1.5 MPa or above, and then keeping the temperature and the pressure; (3) adding reinforcing fibers accounting for 1-8% of the total mass of solids into xonotlite slurry obtained in the step (2), then adding oily organic silicon emulsion, and fully stirring to enable the solids in the slurry to be fully contacted and mixed with the oily organic silicon emulsion; and (4) carrying out extrusion forming on the slurry prepared in the step (3) in a mold by using a hydraulic machine, and drying to obtain the xonotlite type calcium silicate board with hydrophobic inside and outside.

Description

technical field [0001] The present invention relates to the technical field of inorganic thermal insulation materials, in particular to an internal and external water-repellent tobermorite type calcium silicate board and a manufacturing method thereof. Background technique [0002] Building energy conservation is an important link in my country's energy conservation, emission reduction and sustainable development, and thermal insulation materials are the basic key materials for building energy conservation. At present, the common organic thermal insulation materials such as molded polystyrene foam (EPS) and extruded polystyrene foam (XPS) in the domestic market generally cannot achieve Class A non-combustibility, and currently commonly used inorganic thermal insulation materials such as rock wool, Thermal insulation mortar has problems such as easy water absorption and unstable thermal conductivity. In recent years, the fire of building thermal insulation materials and the ...

Claims

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Application Information

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IPC IPC(8): C04B28/10E04B1/66E04B1/76E04B1/94C04B111/27
CPCC04B2201/20C04B2201/50C04B2201/32C04B2111/27C04B28/188C04B40/0259C04B40/0263C04B2111/28C04B14/06C04B22/064C04B14/42C04B24/42C04B16/0683C04B14/386C04B18/101Y02W30/91
Inventor 臧健皓臧明光
Owner LAIZHOU MINGGUANG THERMAL INSULATION MATERIALS
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