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Pulp sludge ash composition for producing building materials

A technology for building materials and compositions, applied in the field of pulp marl compositions and modified sodium silicate for the production of building materials, can solve problems such as poor water resistance, uneconomical curing steps, low industrial applicability, etc., and achieve excellent waterproofing and strength, contribute to recycling and environmental protection, cost-effective effect

Inactive Publication Date: 2007-10-17
朴钟元
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a problem that, since sodium silicate itself has poor water repellency, the adhesion between sodium silicate and metal oxide is weakened after the pulp plaster is cured due to the absorption of ambient water or moisture by the cured material.
There is another problem in this method: it includes a steam curing step at high temperature, so this curing step is not cost-effective and has low industrial applicability

Method used

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  • Pulp sludge ash composition for producing building materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] First, provide 60 parts of pulp plaster. Then 85 parts of modified sodium silicate were prepared by mixing 1,500 g of sodium silicate with an acidic aqueous solution under stirring. The acidic solution was obtained by introducing 200 g of copper sulfate, 150 g of sodium sulfate, 1,000 g of caustic soda and 1,000 g of chrome alum in aqueous solution into a stirrer and stirring the material for 30 minutes. Then 60 parts of pulp sludge were mixed with 85 parts of modified sodium silicate to obtain a cementitious composition.

[0052] The pulp marl composition was injected into a cylindrical mold with a diameter of 50 mm and a depth of 100 mm. Rods weighing 1 kg and having a diameter of 10 mm were then placed on the mold at various times to determine when the initial curing was complete when the surface of the molded product no longer showed physical changes and could be demolded and handled. The composition removed from the mold was naturally cured for 7 days. The compo...

Embodiment 2

[0054] First, provide 60 parts of pulp plaster. Then by adding 300 g of 10% aqueous solution of sodium lauryl sulfate and 1,000 g of aqueous caustic soda to 1,000 g of sodium silicate, and stirring the material for 30 minutes, then adding 300 g of 10% aqueous solution of sulfuric acid thereto and further stirring 85 parts of modified sodium silicate were obtained. Then 60 parts of pulp sludge were mixed with 85 parts of modified sodium silicate to obtain a cementitious composition.

[0055] The composition obtained in this example was tested using the same method as described in Example 1 above. The results are shown in Table 1 below.

Embodiment 3

[0057] First, provide 60 parts of pulp plaster. Then 85 parts of modified sodium silicate were prepared by mixing 1,500 g of sodium silicate with an acidic aqueous solution under stirring. The acidic solution was obtained by introducing 200 g of copper sulfate, 150 g of sodium sulfate, 1,000 g of caustic soda and 1,000 g of chrome alum in aqueous solution into a stirrer and stirring the material for 30 minutes. Furthermore, 30 g of latex and 3 g of silicone oil were added to 1,000 g of the acidic solution. Then 60 parts of pulp sludge were mixed with 85 parts of modified sodium silicate to obtain a cementitious composition.

[0058] The composition obtained in this example was tested using the same method as described in Example 1 above. The results are shown in Table 1 below.

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Abstract

Disclosed is a pulp sludge ash composition for producing building materials, which comprises pulp sludge ash combined with modified sodium silicate having an acidic group. The pulp sludge ash composition shows excellent water resistance and strength as well as improved physical properties, and thus is useful for various industrial fields as a building material, a civil engineering material, an interior material, a filler for a safe, or the like.

Description

technical field [0001] The present invention relates to pulp stucco compositions for the production of building materials. More specifically, the present invention relates to a pulp sludge composition for producing building materials, comprising pulp sludge obtained by incinerating pulp sludge produced after a wastewater treatment step in a papermaking process, and further comprising Group of modified sodium silicate. The pulp stucco composition of the present invention sets rapidly without additional baking or sintering. In addition, the above-mentioned pulp plaster composition further comprising a polymer emulsion exhibits excellent strength and water resistance. Background technique [0002] Typically, large volumes of pulp sludge are generated after the wastewater treatment step in the papermaking process. Most pulp sludge is discarded in landfills. However, pulp sludge itself is not suitable for disposal as landfill because it does not solidify easily due to its hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/01
CPCC04B28/26Y02W30/91C04B14/06C04B14/18C04B18/08C04B18/103C04B18/26C04B20/0048C04B22/062C04B22/106C04B22/141C04B22/142C04B24/2641C04B24/383C04B38/02C04B14/104C04B14/20C04B16/08C04B18/101C04B18/141C04B22/064C04B22/122C04B24/281D21H17/01D21H17/68
Inventor 朴钟元
Owner 朴钟元
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