Asbestos-free calcium silicate board and method for making same

A calcium silicate board, asbestos-free technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as unsupported, easy to break, and gypsum board is easy to break, and achieve strong resistance to subsidence performance, strong fire resistance and moisture resistance

Inactive Publication Date: 2006-12-27
章燕芳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its biggest disadvantage is that the fine asbestos fibers can float in the air for a long time after being released, and can invade the human respiratory tract and deposit there, causing various respiratory diseases and even lung cancer.
However, conventional gypsum boards have defects such as easy breakage, failure to hold flat, deformation after long-term moisture, pot falling, and easy cracking after fire.

Method used

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  • Asbestos-free calcium silicate board and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: get respectively 48% of quartz sand, 18% of cement, 18% of lime, 3% of wollastonite acicular powder, 5% of mica powder, 8% of wood fiber, and 1‰ of polyacetamide; The fibers are made into shredded pulp without impurities, and then cement, quartz sand, lime, mica powder, wollastonite needle powder, and polyacetamide are evenly dosed in proportion with a batching machine, and the ingredients are beaten again by a beater, and then sizing is done through a flow machine , plate-making machine-made plate, cutting machine to cut the plate, after flattening the plate surface, steam curing for 18 hours under the constant pressure of 1.0Mpa in the autoclave, so that it is basically fully crystallized into tobermolite; Dry in a dry kiln to remove excess water, and finally grind the edge with a chamfering machine, and then sand it with a sander to form a calcium silicate board. The properties of the plate materials are shown in Table 1.

Embodiment 2

[0011] Embodiment 2: get respectively 38% of quartz sand, 24% of cement, 24% of lime, 8% of wollastonite acicular powder, 1% of mica powder, 5.5% of wood fiber, and 0.5‰ of polyacetamide; according to the steps of embodiment 1 Made of calcium silicate board. The properties of the plate materials are shown in Table 1.

Embodiment 3

[0012] Embodiment 3: Take 44.94% of quartz sand, 22.47% of cement, 22.47% of lime, 8.98% of wollastonite acicular powder, 1.14% of mica powder, 7% of wood fiber, and 1‰ of polyacetamide. The step of embodiment 1 makes calcium silicate board. The properties of the plate materials are shown in Table 1.

[0013] This product has been tested many times and its main technical indicators: Density 1.08g / cm 3 , The flexural strength is 16.4Mpa, the thermal conductivity is 0.108w / m.k, the moisture content is 8.0%, and the wet expansion rate is 0.16%. All meet the standards of the National Building Materials Testing Center. Use a multi-purpose knife, electrician's knife or carbonized sharp knife to draw a straight line on the calcium silicate board to a depth of about 1 / 3 of the thickness of the board. A straight saw or a circular saw can also be used for cutting; ordinary iron nails or screws can easily fix the asbestos-free calcium silicate board, and it is not easy to pull out.

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Abstract

The invention discloses a non-amianthine calcium silicate board and preparing method in the architectural profession, which comprises the following parts: 38-48 percent quartz sand, 18-24 percent cement, 18-24 percent lime, 3-8 percent wollastonite needle powder, 1-5 percent mica powder, 5.5-8 percent wood fiber, 0.5-1%. polyacetamide, The invention belongs to new green environment-protective building material, which fits for high-grade space with higher cleanness need.

Description

Technical field: [0001] The invention relates to a calcium silicate board in the building material industry and a manufacturing method thereof. Background technique: [0002] With the development of the situation, the competition in the building materials market is becoming more and more fierce, and the requirements for products are also getting higher and higher. But the general trend is that new environmentally friendly building materials will gradually become the leading role in the building materials market. [0003] In order to achieve the ideal fireproof effect, the calcium silicate board originally produced added a large amount of asbestos to its formula. Its biggest disadvantage is that the tiny fibers of asbestos can float in the air for a long time after being released, and can invade the human respiratory tract and deposit there, causing various respiratory diseases and even lung cancer. However, conventional gypsum boards have defects such as being easily broke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/06C04B14/30C04B14/20C04B18/26C04B24/12
CPCC04B2111/28C04B2111/12C04B28/18Y02P40/60Y02W30/91C04B14/043C04B14/06C04B14/20C04B18/26C04B24/125C04B40/024
Inventor 章燕芳
Owner 章燕芳
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