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Lightweight brick produced by using papermaking sludge as raw material and preparation method thereof

A technology for papermaking sludge and lightweight bricks, applied in sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as consumption, earthquake resistance, poor bending resistance, and poor thermal insulation performance. Achieve the effects of saving land resources, excellent thermal insulation performance, and excellent bending resistance

Inactive Publication Date: 2012-10-03
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the lightweight bricks currently on the market are made of foamed concrete. Due to the material decision, there are the following deficiencies: 1) The bulk density is high, generally at 600Kg / m 3 -1100Kg / m 3 Between, it is difficult to reach 600Kg / m 3 the following
2) Brittle and fragile, poor shock resistance and bending resistance
3) Poor insulation performance
The amount of paper sludge treated by this method is very limited, and because the country has explicitly banned the use of clay, its products cannot be industrialized; in addition, the production of this fired brick requires a large amount of coal consumption

Method used

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  • Lightweight brick produced by using papermaking sludge as raw material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A lightweight brick produced with papermaking sludge as raw material, the raw material components are as follows: 350Kg of papermaking sludge, 16Kg of 32.5 grade cement, 84g of 40% formaldehyde solution, 16g of urea, 144g of bone glue, sodium dodecylbenzenesulfonate 42g, triethanolamine 14g.

[0044] A method for producing lightweight bricks using papermaking sludge as a raw material, the specific steps are as follows:

[0045] 1) Dehydration treatment of papermaking sludge

[0046] Take 350Kg of papermaking sludge, and further dehydrate it to a water content of 40wt% by a screw press filter;

[0047] 2) The configuration of the base material:

[0048] Take the dehydrated papermaking sludge in step 1) and put it into a mixer, add 16Kg of 32.5 grade cement, mix evenly, and form a base material;

[0049] 3) Preparation of crosslinking agent

[0050] Add 16 g of urea to 84 g of 40% formaldehyde solution, and mix evenly to obtain the crosslinking agent;

[0051] 4) Prepa...

Embodiment 2

[0056] A kind of lightweight brick produced with papermaking sludge as raw material. The raw material components are the same as in Example 1, except that 126g of 40% formaldehyde solution and 24g of urea are taken.

[0057] A method for producing lightweight bricks using papermaking sludge as a raw material, the specific steps are the same as in Example 1, the difference is step 3) preparation of crosslinking agent: take 126g of 40% formaldehyde aqueous solution and add 24g of urea, mix evenly to get final product crosslinking agent.

[0058] The bulk density and compressive strength of the obtained lightweight brick products are respectively 575Kg / m after being roughened. 3 and 7.5MPa, the thermal conductivity is 0.22W / (m.K).

Embodiment 3

[0060] A lightweight brick produced with papermaking sludge as raw material. The raw material components are the same as in Example 1, except that 170 g of bone glue, 50 g of sodium dodecylbenzenesulfonate, and 16 g of triethanolamine are used.

[0061] A method for producing lightweight bricks using papermaking sludge as a raw material, the specific steps are the same as in Example 1, the difference is step 4) the preparation of foaming agent: 170g of bone glue is added to 850g of water and heated until it is dissolved and boiled to form a glue solution, and then Add 50 g of sodium dodecylbenzenesulfonate and 16 g of triethanolamine and stir evenly to obtain a foaming agent.

[0062] The bulk density and compressive strength of the obtained lightweight brick products are respectively 650Kg / m after being roughened. 3 and 7.2MPa, the thermal conductivity is 0.24W / (m.K).

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Abstract

The invention discloses a lightweight brick produced by using papermaking sludge as a raw material and a preparation method thereof, and belongs to the fields of building materials and environmental friendliness. The papermaking sludge is used as the raw materials in the lightweight brick. The method comprises the following steps of: sequentially adding a base material, a cross linker and a foaming agent into a stirrer in a ratio, fully stirring the materials, mixing the materials uniformly, feeding the mixture into a brick making machine for molding, curing for 4 to 6 days in a curing room at normal temperature, and performing finishing treatment on the cured lightweight brick to obtain a finished product. The volume density of the prepared lightweight brick can reach 400 to 700Kg / m<3>; because the lightweight brick is formed by cross linking and curing of cellulose, the lightweight brick has high strength and elasticity, and the seismic resistance and the bending resistance of the lightweight brick are further superior to those of a concrete lightweight brick; and the heat preservation performance of the lightweight brick is also superior to that of the concrete lightweight brick.

Description

technical field [0001] The invention belongs to the field of building materials and environmental protection, and in particular relates to a method for producing lightweight bricks using papermaking sludge as a raw material. Background technique [0002] The paper industry is a large waste water discharger. With the enhancement of people's awareness of environmental protection and the strengthening of national environmental protection requirements, most of the waste water discharged by paper mills has been strictly treated, but the sludge generated by the treatment of paper making waste water will still cause serious pollution to the environment. , is a source of pollution that urgently needs to be treated. According to statistics, only paper mills in the country produce about 100 million cubic meters of sludge per year. This sludge contains heavy metal ions, polyacrylamide and other harmful substances, which can seriously pollute soil, rivers, and groundwater. It is harmful...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04C1/00C04B30/00C02F11/00C04B18/30
CPCY02W30/91
Inventor 杨小凤王志玲
Owner UNIV OF JINAN