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Calcium silicate board with paper mill sludge ash and preparation method thereof

A papermaking sludge ash and calcium silicate board technology, which is applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of soil pollution, large land occupation, etc., and achieve simple preparation methods and environmental protection , the effect of saving resources

Active Publication Date: 2015-11-04
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these treatment methods all take up a large amount of land, and landfilling and stacking can easily cause soil pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A calcium silicate board containing papermaking sludge ash, which is composed of the following raw materials in weight percentage: 20% cement, 10% papermaking sludge ash, 40% quartz sand, 10% wood pulp, 5% asbestos fiber, Sanding waste 15%.

[0028] As mentioned above, the papermaking sludge ash is the powder obtained by incinerating the papermaking sludge at 400°C, sieved with a 200-mesh sieve, and the residue is less than 10%.

[0029] As mentioned above, the main components of papermaking sludge ash are calcium aluminosilicate and anhydrous calcium sulfate.

[0030] As mentioned above, the sanding waste is the waste obtained after being processed by a sanding machine in the production process of calcium silicate boards, sieved with a 200-mesh sieve, and the sieved residue is less than 10%.

[0031] As mentioned above, the particle size of quartz sand is less than 75 microns, the moisture content is 20%, and the mud content is less than 10%.

[0032] Described, wood...

Embodiment 2

[0041] A calcium silicate board containing papermaking sludge ash, which is composed of the following raw materials in weight percentage: 30% cement, 20% papermaking sludge ash, 30% quartz sand, 6% wood pulp, 4% asbestos fiber, Sanding waste 10%.

[0042] As mentioned above, the papermaking sludge ash is the powder obtained by incinerating the papermaking sludge at 600°C, sieved with a 200-mesh sieve, and the residue is less than 10%.

[0043] As mentioned above, the main components of papermaking sludge ash are calcium aluminosilicate and anhydrous calcium sulfate.

[0044] As mentioned above, the sanding waste is the waste obtained after being processed by a sanding machine in the production process of calcium silicate boards, sieved with a 200-mesh sieve, and the sieved residue is less than 10%.

[0045] As mentioned above, the particle size of quartz sand is less than 75 microns, the moisture content is 18%, and the mud content is less than 10%.

[0046] Described, wood ...

Embodiment 3

[0055] A calcium silicate board containing papermaking sludge ash, which is composed of the following raw materials in weight percentage: 40% cement, 31% papermaking sludge ash, 21% quartz sand, 1% wood pulp, 1% asbestos fiber, Sanding waste 6%.

[0056] As mentioned above, the papermaking sludge ash is the powder obtained by incinerating the papermaking sludge at 850°C, sieved with a 200-mesh sieve, and the sieve residue is less than 10%.

[0057] As mentioned above, the main components of papermaking sludge ash are calcium aluminosilicate and anhydrous calcium sulfate.

[0058] As mentioned above, the sanding waste is the waste obtained after being processed by a sanding machine in the production process of calcium silicate boards, sieved with a 200-mesh sieve, and the sieved residue is less than 10%.

[0059] As mentioned above, the particle size of quartz sand is less than 75 microns, the moisture content is 16%, and the mud content is less than 10%.

[0060] Described, ...

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Abstract

The invention discloses a calcium silicate board with paper mill sludge ash and a preparation method thereof. The calcium silicate board is composed of, by weight, 20-40% of cement, 10-31% of the paper mill sludge ash, 21-40% of quartz sand, 1-10% of wood pulp, 1-5% of asbestos fiber and 6-15% of sanding waste. The paper mill sludge ash is used for replacing some cement, so that the calcium silicate board has the good shock resistance and humidity resistance performance, the bulking factor is smaller than or equal to 0.25%, the hot-shrinkage rate is smaller than or equal to 0.5%, and the calcium silicate board completely conforms with the regulations of JC / T564-2000 Fiber-Reinforced Calcium Silicate Board standards. According to the invention,harmless utilization of paper mill sludge can be achieved, the environment is protected, resources are saved, waste is turned into wealth, the cement and quartz sand use amount is reduced, the cost is lowered, and the calcium silicate board has the good economic and social benefits. The preparation method of the calcium silicate board is easy and convenient to implement and is low in production cost.

Description

technical field [0001] The invention relates to the technical field of building material production, in particular to a calcium silicate board containing papermaking sludge ash and a production method thereof. Background technique [0002] 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. At present, new building environmental protection materials with light weight, high strength and energy saving are the development direction of the building materials industry. Promote the level of mechanization and assembly of board construction, and prepare boards with good waterproof, moisture-proof and im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/10
CPCY02W30/91
Inventor 芦令超陈明旭王守德宫晨琛程新
Owner UNIV OF JINAN
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