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Method for preparing a hollow cement product based on superabsorbent resin

A technology of super absorbent resin and cement products, applied in the direction of manufacturing tools, coagulating pavement paved on site, pavement details, etc., can solve the problems of low strength, small construction thickness, easy to collapse, etc. Enhance the effect of improving cement strength and uniform void distribution

Inactive Publication Date: 2019-01-18
LESHAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Foamed cement has the advantages of low density, light weight, sound insulation and fire resistance, convenient production and processing, and environmental protection. However, foamed cement cannot be used to prepare large-pore hollow cement products, and has disadvantages such as small construction thickness, easy collapse, and low strength.
[0005] At present, the preparation methods of hollow cement products are limited, and most of them require special equipment, and the cost is high, which also limits the popularization and use of hollow cement products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Spherical hollow cement brick

[0028] Soak 5g of spherical granular water-absorbent resin in 2L of fresh water to expand the volume of each small sphere by about 100 times, then drain the water to obtain about 500g of spherical hydrogel. The spherical hydrogel was mixed with 250 g of white cement, and 0.1 L of water was added to adjust the consistency of the cement to obtain a mixture of hydrogel, cement and water with certain fluidity. Add the cement mixture into a brick-shaped mold, pave it flat, take off the mold after the cement solidifies, and place it for several days. The spherical hydrogel in the cement brick continuously loses water and shrinks, and finally the completely dry resin adheres to the formed spherical cavity, and a hollow cement brick product with a large number of spherical pores is obtained.

Embodiment 2

[0030] Hollow cement ball

[0031] Soak 1g of spherical granular water-absorbent resin in 0.5L of fresh water, so that the volume of each small sphere expands about 200 times, drain the water, and obtain about 200g of spherical hydrogel. Mix the spherical hydrogel with 200g of ordinary cement, vibrate and shake continuously, so that a layer of cement adheres to the spherical hydrogel. The cement-adhered spherical hydrogel is placed for several days, the outer layer of cement solidifies, the hydrogel inside the sphere continuously loses water and shrinks, and finally the completely dry resin adheres to the formed spherical cavity to obtain a hollow Cement balls, the hollow cement balls can be used as insulation materials.

Embodiment 3

[0033] hollow cement wall

[0034] Soak 50 kg of granular water-absorbing resin into 10-15 cubic meters of fresh water. After the resin fully absorbs water and swells, drain the water to obtain about 4000 kg of small spherical hydrogel. The spherical hydrogel is mixed with about 3000 kg of cement sand, and about 2 cubic meters of water is added to adjust the consistency of the concrete to obtain a mixture of hydrogel and concrete with certain fluidity. Pour the mixture into the preset wall baffle, pave it flat, remove the baffle after the cement is cured, and place it for several days. The water-absorbing resin in the wall continuously loses water and shrinks, and finally becomes a dry resin adhesion. In the formed cavity, a hollow cement wall with a large number of pores is obtained.

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Abstract

The invention discloses a method for preparing a hollow cement product based on a superabsorbent resin, which comprises the following steps: S1, taking a certain amount of superabsorbent polymer resinin a certain form to fully absorb water and expand into a corresponding solid hydrogel; S2, taking a certain amount of superabsorbent polymer resin in a certain form to fully absorb water and expandinto a corresponding solid hydrogel; S2, according to the mass ratio of the obtained solid hydrogel to cement is 1: 0.2-10, adding proper amount of water to adjust the consistency of the cement to obtain hydrogel cement; S3, adding the obtained hydrogel cement into any mould, solidifying, dismantling the mould, and leaving a large number of pores inside the cement after the hydrogel inside the cement is completely dehydrated, thereby obtaining a hollow cement product. As that proces of the invention does not nee professional production equipment, the cost is low; the density, size and shape ofthe pores in cement can be controlled, and the voids are evenly distributed.

Description

technical field [0001] The invention relates to the field of building material cement products, in particular to a method for preparing hollow cement products based on superabsorbent resin. Background technique [0002] With the vigorous development of my country's economic construction, the construction industry has also made great progress. Hollow cement products have the advantages of light weight, heat preservation, environmental protection, flame retardancy, and aging resistance, and are widely used in the construction industry. At present, hollow cement blocks and foamed cement products are the most widely used hollow cement products. [0003] Hollow cement block is a hollow structure made of cement block by physical extrusion. It is widely used in building facilities such as enclosure walls, retaining walls, bridges and flower beds. It has the advantages of good thermal performance, convenient masonry, and high construction efficiency. . However, the blocks are rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/00E01C11/22B28B1/50
CPCB28B1/50E01C7/00E01C11/226
Inventor 田冲陈俏杨金明李杰孙国峰聂万丽马克西姆
Owner LESHAN NORMAL UNIV
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