Preparation process of environment-friendly low-cost fluoroaluminate cement added with waste bricks

A fluoroaluminate cement and a preparation process technology, applied in the field of fluoroaluminate cement, can solve the problems of unsatisfactory strength and easy leakage in the later stage, and achieve the effects of being convenient for wide popularization and application, enhancing waterproofness and convenient operation.

Active Publication Date: 2021-04-20
ZHENGZHOU JIANWEN SPECIAL MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although fluoroaluminate cement has the characteristics of rapid hardening and early strength, its later strength is not ideal, and it is prone to leakage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An environmentally friendly and low-cost fluoroaluminate cement preparation process with waste bricks added, comprising the following steps:

[0026] S1. Mix 50 kg of ferric fluoride slag, 15 kg of high-magnesium limestone with a magnesium content of 4.2%, 5 kg of bauxite, and 1 kg of fluorite, and send them into a grinder to pulverize to a particle size of 50-150 μm to obtain raw meal;

[0027] S2. Break 20kg of waste bricks to 10-50mm, add 40kg of water, 1kg of polyvinyl alcohol, and 1kg of toluene diisocyanate to it, stir for 1 hour at a speed of 1000r / min, add 5kg of ethyl acetate, and continue stirring for 10 minutes. The stirring temperature is 60°C to obtain pretreated waste bricks;

[0028] S3. Mix pretreated waste bricks, 5kg montmorillonite, and 1kg chloropropyltriethoxysilane into a grinder, and grind at a high speed for 10 minutes with a grinding speed of 10000r / min and a grinding pressure of 0.12MPa to obtain recycled materials ;

[0029] S4. Put the raw ...

Embodiment 2

[0032] An environmentally friendly and low-cost fluoroaluminate cement preparation process with waste bricks added, comprising the following steps:

[0033] S1. Mix 80kg of ferric fluoride slag, 25kg of high-magnesium limestone with a magnesium content of 4.6%, 20kg of bauxite, and 4kg of fluorite, and send them into a grinder to pulverize to a particle size of 50-150 μm to obtain raw meal;

[0034] S2. Break 40kg of waste bricks to 10-50mm, add 80kg of water, 2kg of polyvinyl alcohol, and 2kg of toluene diisocyanate to it, stir for 2 hours at a speed of 2000r / min, add 15kg of ethyl acetate, continue stirring for 20min, and the stirring temperature is 80°C to obtain pretreated waste bricks;

[0035] S3. Mix pretreated waste bricks, 10kg montmorillonite, and 2kg 3-aminopropyltriethoxysilane, add them to a grinder, and grind at a high speed for 20 minutes with a grinding speed of 15000r / min and a grinding pressure of 0.18MPa to obtain regeneration material;

[0036] S4. Put th...

Embodiment 3

[0039] An environmentally friendly and low-cost fluoroaluminate cement preparation process with waste bricks added, comprising the following steps:

[0040] S1. Mix 60 kg of ferric fluoride slag, 18 kg of high-magnesium limestone with a magnesium content of 4.3%, 8 kg of bauxite, and 2 kg of fluorite, and send them into a grinder to pulverize to a particle size of 50-150 μm to obtain raw meal;

[0041] S2. Break 25kg of waste bricks to 10-50mm, add 50kg of water, 1.2kg of polyvinyl alcohol, and 1.2kg of toluene diisocyanate to it, stir at a speed of 1200r / min for 1.2h, add 12kg of ethyl acetate, and continue stirring for 12min. The stirring temperature is 62°C to obtain pretreated waste bricks;

[0042] S3. Mix the pretreated waste bricks, 6kg montmorillonite, and 1.2kg γ-methacryloxypropyltrimethoxysilane, add them to the grinder, and grind at a high speed for 12min, the grinding speed is 12000r / min, and the grinding pressure is 0.14MPa, to obtain recycled materials;

[004...

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Abstract

The invention discloses a preparation process of environment-friendly low-cost fluoroaluminate cement added with waste bricks. The cement comprises the following steps of: sequentially preparing a raw material; pretreating the waste bricks to prepare a reclaimed material and clinker; mixing the clinker, the reclaimed material, fly ash, slag, silica fume, gypsum and carbon nanofibers; grinding the mixture until the particle size is 50-150 mu m; adding a polycarboxylate superplasticizer, sodium gluconate, a penetrating agent and water; and performing uniform mixing to obtain the environment-friendly low-cost fluoroaluminate cement. According to the technical schemes of the invention, after the waste bricks are modified, the porosity of the waste bricks can be reduced, the waterproof and anti-seepage performance can be effectively enhanced, meanwhile, the mechanical performance of the cement can be enhanced, the cement is environmentally friendly; and the preparation method of the mortar is simple, convenient to operate and capable of being widely applied and popularized.

Description

technical field [0001] The invention relates to the technical field of fluoroaluminate cement, in particular to an environmentally friendly and low-cost fluoroaluminate cement preparation process with waste bricks added. Background technique [0002] With the rapid development of the construction industry, the pace of urbanization is getting faster and faster. At the same time, there are more and more old city renovation projects, and a large amount of abandoned construction waste is generated, such as abandoned bricks. Most of the abandoned bricks in our country have not passed the scientific Generally, it is treated as garbage and randomly piled up in the open air, or it is disposed of in a simple landfill method. [0003] The fluoroaluminate cement is a cement with calcium fluoroaluminate as the main additive, and has a fast hardening speed. It uses limestone, bauxite and fluorite as raw materials, and it is calcined at 130-1100 ° C to mature the material, and an appropri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/32C04B7/21C04B7/38C04B7/43C04B7/48C04B7/51
CPCY02P40/10
Inventor 李豪张世杰张学文刘小芬张进卫
Owner ZHENGZHOU JIANWEN SPECIAL MATERIAL TECH
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