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High-strength alkali-resistant composite brick based on waste reutilization and preparation method of high-strength alkali-resistant composite brick

A technology for reusing and compounding bricks, applied in the field of building materials, can solve the problem of high production cost, and achieve the effects of reducing production cost, increasing consumption, and enhancing alkali corrosion resistance.

Active Publication Date: 2022-04-12
宜兴市隆昌耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that this technical document uses waste bricks and waste concrete demolished in cities and urbanization as raw materials, and after adding high molecular polymers, alkali-resistant glass fibers and other raw materials, the strength of the prepared materials can be improved quickly, and the strength of the prepared materials is relatively high within 7 days. High, comprehensive mechanical properties have been greatly improved technical solutions, but in this technical solution, it is necessary to use raw materials such as high molecular polymers that can quickly increase the strength and improve the gelation and coagulation performance between materials, resulting in high material preparation costs
[0005] Another example: Patent No. 201910800687.X discloses high-strength alkali-resistant bricks produced by using silica powder. Diameter ≤ 0.088mm waste electrical porcelain, particle size ≤ 0.088mm silica powder, particle size ≤ 0.088mm combined with clay, particle size ≤ 0.044mm kyanite powder, so that the compressive strength can reach more than 60MPa, and the bulk density can reach 2.2g / cm 3 , apparent porosity ≤ 19wt%, 0.2MPa load softening temperature ≥ 1380°C, thermal shock stability ≥ 10 (1100°C water cooling / time), still need to add silica powder as siliceous raw material to supplement silicon in the raw material composition, resulting in production cost higher

Method used

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  • High-strength alkali-resistant composite brick based on waste reutilization and preparation method of high-strength alkali-resistant composite brick
  • High-strength alkali-resistant composite brick based on waste reutilization and preparation method of high-strength alkali-resistant composite brick
  • High-strength alkali-resistant composite brick based on waste reutilization and preparation method of high-strength alkali-resistant composite brick

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preparation example Construction

[0031] Such as figure 1 As shown, in some embodiments, the method for preparing high-strength alkali-resistant composite bricks based on waste recycling comprises the following steps:

[0032] (1) Grinding the electrolytic manganese slag until the specific surface area is 800-1000m 2 / kg, to get manganese slag powder; the specific surface area of ​​manganese slag powder is not limited to 800-1000m 2 / kg, can be any value within this range, for example: 800m 2 / kg, 850m 2 / kg, 880m 2 / kg, 900m 2 / kg, 910m 2 / kg, 940m 2 / kg, 970m 2 / kg, 1000m 2 / kg, etc., you can also choose a value larger than this specific surface area, for example: 1100m 2 / kg, 1140m 2 / kg, 1200m 2 / kg, 1400m 2 / kg, 1800m 2 / kg etc.

[0033] (2) crushing and grinding the solid waste, and sieving to prepare powder, fine particles and coarse particles;

[0034] (3) Mix the powder with manganese slag powder, water, granulate, and calcinate to obtain the calcined aggregate;

[0035] (4) Mix the fi...

Embodiment 1

[0049] (1) Grinding the electrolytic manganese slag until the specific surface area is 800m 2 / kg, to get manganese slag powder;

[0050] (2) Grinding the solid waste, and sieving to prepare powder with a particle size of <0.2 mm, fine particles with a particle size of 0.2-3 mm, and coarse particles with a particle size of 3-10 mm;

[0051] (3) Mix the powder and manganese slag powder at a mass ratio of 1:1, water, granulate into particles with a particle size between 3-5mm, and calcinate at a temperature of 1000°C for 0.5h to obtain calcined aggregate;

[0052] (4) Mix fine particles and manganese slag powder at a mass ratio of 1:0.5, water until the moisture content is 6%, and stir at 300r / min for 2 hours to obtain the mixture;

[0053] (5) Mix manganese slag powder and coarse particles at a mass ratio of 1:2, and send them into a grinder to grind until the specific surface area is ≥ 2000m 2 / kg to get mixed powder; then add an additive accounting for 3% of the mixed powd...

Embodiment 2

[0057] (1) Grinding the electrolytic manganese slag until the specific surface area is 1000m 2 / kg, to get manganese slag powder;

[0058] (2) Grinding the solid waste, and sieving to prepare powder with a particle size of <0.2 mm, fine particles with a particle size of 0.2-3 mm, and coarse particles with a particle size of 3-10 mm;

[0059] (3) Mix the powder and manganese slag powder at a mass ratio of 1:4, water, granulate into particles with a particle size between 3-5mm, and calcinate at a temperature of 1200°C for 3 hours to obtain calcined aggregate;

[0060] (4) Mix fine particles and manganese slag powder at a mass ratio of 1:2, water until the moisture content is 8%, and stir at 500r / min for 3 hours to obtain the mixture;

[0061] (5) Mix manganese slag powder and coarse particles at a mass ratio of 1:4, and send them into a grinder to grind until the specific surface area is ≥ 2000m 2 / kg to get mixed powder; then add an additive accounting for 7% of the mixed po...

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Abstract

The invention relates to the technical field of building materials, in particular to a high-strength alkali-resistant composite brick based on waste reutilization and a preparation method of the high-strength alkali-resistant composite brick. Electrolytic manganese residues and solid waste generated by house demolition are selected as main raw materials, and silicon-calcium resources in the electrolytic manganese residues and the solid waste are fully utilized; solid waste is subjected to grinding and grading treatment, electrolytic manganese residues are ground to expose siliceous components, then manganese residue powder and powder are used for preparing calcined aggregate, the manganese residue powder and fine particles are mixed to form a mixture, the manganese residue powder and coarse particles are ground to form mixed powder, and an additive is added as a gelatinizing agent, so that the consumption of the electrolytic manganese residues and the solid waste is increased; the silicon components in the electrolytic manganese residues interact with materials with different silicon and calcium components in the solid waste, and calcined aggregate, a mixture and a gelling agent are formed respectively. And through extrusion forming, drying maintenance and calcination maintenance, the compression resistance and breaking strength of the composite brick are improved, and the alkali corrosion resistance is enhanced.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-strength alkali-resistant composite brick based on waste recycling and a preparation method thereof. Background technique [0002] With the acceleration of urbanization and urbanization, the demolition of old cities and town houses has produced a large amount of solid waste, such as waste bricks, waste stones, waste concrete, etc. Compared with new concrete and bricks, etc. , the strength of these solid wastes is extremely low and the water absorption rate is high, so that when they are recycled and reused to prepare concrete and concrete bricks, the crushing index of concrete particles is greatly reduced, which greatly affects the concrete and concrete obtained from resource recycling. The comprehensive mechanical properties and anti-permeability of its products lead to low strength and poor alkali resistance of the resulting concrete products. Therefore, how t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/138C04B33/132C04B33/13
CPCY02P40/60Y02W30/91
Inventor 顾晨译顾建中
Owner 宜兴市隆昌耐火材料有限公司
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