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Method for preparing plate from construction waste

A construction waste and plate technology, applied in the field of building materials, can solve the problems of low added value, high water absorption rate of unburned bricks, and large property differences, achieving less organic impurities, good properties such as impermeability, and less impurity content Effect

Inactive Publication Date: 2019-03-12
GUIZHOU ANKAIDA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to statistics, my country currently produces about 1 billion tons of construction waste every year, accounting for about 30-40% of the total urban waste, and the resource utilization rate of these construction wastes is less than 5%.
One is to simply crush the construction waste and use it as backfill material, which has very low added value, and after a certain transportation distance, it has no use value due to the high transportation cost
The second is to prepare aggregates, unburned bricks or wall materials after the construction waste is crushed and screened as a whole. Since the separation of sand, clay bricks and concrete in the construction waste cannot be achieved, and the properties of these components vary greatly, the aggregate High water absorption, low strength and difficult to use, unburned bricks have high water absorption, poor durability, wall materials have low strength, poor durability
The third is to use one or two components in construction waste to prepare building materials, which cannot realize the resource utilization of all components of construction waste. In addition, there is no clear industrial technical plan for the separation of components from construction waste.
Fourth, the treatment process is incomplete and complicated, making it difficult for industrial application

Method used

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  • Method for preparing plate from construction waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) 100kg of construction waste is crushed by a crusher until the particle size is below 5cm, and treated at 300°C for 2.5 hours;

[0032] (2) Moisten the broken mixture with water, evenly sprinkle 0.3% microbial inoculum, treat for 3 days, keep the mixture moist during the treatment process, and the microbial inoculum is obtained by mixing the following microorganisms: Thiobacillus ferrooxidans 18kg , Microspirillum ferrooxidans 9kg, Lactobacillus 8kg, Acinetobacter johnsonii 5kg, Pseudomonas putida 7kg, metal-resistant copper greedy bacteria 13kg;

[0033] (3) Drain the liquid in the microbially treated mixture, and rinse the solid with water 4 times;

[0034] (4) Grinding the washed solid to a particle size below 0.5 mm, and calcining at high temperature;

[0035] (5) add 21.5% lignocellulosic pulp, 20% calcium hydroxide, 10.5% calcium silicate, 9% peach gum, 60% cement, 40% water to calcined, mix uniformly, then Fully react at 180℃ for 10h;

[0036] (6) After ful...

Embodiment 2

[0039] (1) 100kg of construction waste is crushed by a crusher until the particle size is below 5cm, and treated at 280°C for 4 hours;

[0040] (2) Moisten the broken mixture with water, evenly sprinkle 0.1% microbial inoculum, treat for 5 days, keep the mixture moist during the treatment process, and the microbial inoculum is obtained by mixing the following microorganisms: Thiobacillus ferrooxidans 16kg , 7kg of Microspirillum ferrooxidans, 10kg of Lactobacillus, 7kg of Acinetobacter johnsonii, 9kg of Pseudomonas putida, and 10kg of metal-resistant Copper greedy bacteria;

[0041] (3) Drain the liquid in the microbially treated mixture, and rinse the solid with water for 3 times;

[0042] (4) Grinding the washed solid to a particle size below 0.5 mm, and calcining at high temperature;

[0043] (5) Add 15% lignocellulosic pulp, 15% calcium hydroxide, 8% calcium silicate, 7% peach gum, 50% cement, 30% water to calcined, mix uniformly, then Fully react at 160°C for 15 hours; ...

Embodiment 3

[0047] (1) 100kg of construction waste is crushed by a crusher until the particle size is below 5cm, and treated at 320°C for 1 hour;

[0048] (2) Moisten the broken mixture with water, evenly sprinkle 0.5% microbial inoculant, treat for 1d, keep the mixture moist during the treatment process, and the microbial inoculum is obtained by mixing the following microorganisms: Thiobacillus ferrooxidans 20kg , Microspiral ferrooxidans 11kg, Lactobacillus 6kg, Acinetobacter johnsonii 3kg, Pseudomonas putida 5kg, metal-resistant copper greedy bacteria 16kg;

[0049] (3) Drain the liquid in the microbially treated mixture, and rinse the solid with water 5 times;

[0050] (4) Grinding the washed solid to a particle size below 0.5 mm, and calcining at high temperature;

[0051] (5) add 28% lignocellulosic pulp, 25% calcium hydroxide, 8-13% calcium silicate, 11% peach gum, 70% cement, 50% water to calcined, mix uniformly, Then fully react at 200°C for 5h;

[0052] (6) After fully reacti...

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Abstract

The invention belongs to the field of construction materials, and particularly relates to a method for preparing a plate from construction waste. The method comprises the steps: the construction wasteis crushed and then subjected to high temperature treatment, then wetted through water, and treated through a microbial agent prepared from thiobacillus ferrooxidans, ferrooxidans sulfobacillus, lactobacillus, acinetobacter johnsonii, pseudomonas putida and cupriavidus metallidurans; liquid is removed, ingredients such as wood fiber pulp, calcium hydroxide, calcium silicate, peach gum, cement andwater are added into a solid product, and then a high temperature reaction is conducted; and finally the mixture is cut into the suitable size, high-pressure and high-temperature steam-curing is conducted, and finally the fiber plate which is low in impurity content, less in heavy metal and organic impurity residue, good in property such as strength, toughness, fire resistance and permeability resistance, and more durable is obtained.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a method for preparing boards by using construction waste. Background technique [0002] With the steady development of my country's national economy and the advancement of urbanization, the rapid development of the construction industry has brought about a continuous increase in the amount of construction waste. According to statistics, my country currently produces about 1 billion tons of construction waste every year, accounting for about 30-40% of the total urban waste, and the resource utilization rate of these construction wastes is less than 5%. A large number of piled or landfilled construction wastes encroach on land, pollute water and soil resources and the atmospheric environment, and cause serious ecological loads. At the same time, natural resources used as building materials are increasingly depleted. Therefore, making use of the resource properties of...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B20/02B28B11/24
CPCC04B28/00B28B11/245C04B20/02C04B2111/00017C04B18/26C04B22/064C04B22/00C04B24/38C04B18/16
Inventor 吴义德王华秦雪琳赵永宽胡品斌辛建王汝明王勇张继光吴勇
Owner GUIZHOU ANKAIDA IND
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