A high-strength permeable brick with low-grade white mud and expanded perlite as main raw materials and its preparation method

A technology of expanded perlite and main raw materials, applied in the field of preparing high-strength permeable bricks

Active Publication Date: 2020-10-27
XINYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the deficiencies in the above-mentioned existing technologies, improve the efficient utilization rate of low-grade white mud in the kaolin mining process, reduce environmental pollution and accelerate the demand for inorganic mineral composite environmental protection materials in the construction of my country's "sponge city" roads, this paper The invention provides a high-strength permeable brick with low-grade white mud, expanded perlite, sodium hydroxide, sodium bicarbonate, gum arabic and carbon powder as main raw materials and its production method

Method used

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preparation example Construction

[0036] The preparation method of the high-strength permeable brick with low-grade white mud and expanded perlite as the main raw materials comprises the following steps:

[0037] 1) Fully spray and wet the low-grade white mud with 5% alkali-activated aqueous solution, then let it stand for 5h~8h, and set aside;

[0038] 2) After mixing the screened expanded perlite, gum arabic and carbon powder in a blender, add them to the blender in step 1) and mix thoroughly;

[0039] 3) Aging the mixed material obtained in step 2) for 1-2 days, and then making a green body with a length of 25cm, a width of 20cm, and a thickness of 4cm-5cm under a unidirectional pressure of 12Mpa-20Mpa;

[0040] 4) The green body obtained in step 3) is dried naturally or in an electric heating circulation oven at 90°C~120°C;

[0041] 5) The green body obtained in step 4) is sintered in a high-temperature furnace at 950°C to 1050°C for 2h to 3h, and then naturally cooled with the furnace to obtain a permeab...

Embodiment 1

[0043] Weigh 10.0 kg of 230-mesh sieved and pulverized low-grade white mud and place it in an agitator. The aqueous alkali activator solution with a mass fraction of 5% will be configured to infiltrate the white mud (wherein the alkali activator The mass ratio of sodium hydroxide and sodium bicarbonate in the medium is 1:2.5), and the infiltrated white mud is left to stand for 6 hours before use; weigh 3.2kg of expanded perlite with a particle size of 100 mesh, 540.0g of gum arabic, and 300μm toner 2.4kg is mixed and stirred evenly, then added to the white mud mixer and fully mixed to obtain the mixture; the mixture is aged for 1 day, and then made into a raw material with a length of 25cm, a width of 20cm, and a thickness of about 4.5cm under a unidirectional pressure of 18Mpa. The green body is dried in an electric heating circulation oven at 110°C, then sintered in a high-temperature furnace at 1000°C for 2 hours, and then naturally cooled with the furnace to obtain permeabl...

Embodiment 2

[0046]Weigh 7.5 kg of 200 mesh sieved and pulverized low-grade white mud and place it in the agitator, and the alkali-activated water agent solution with a mass fraction of 5% will be configured to infiltrate the white mud (where the alkali-activated The mass ratio of sodium hydroxide and sodium bicarbonate in the agent is 1:2), and the infiltrated white mud is left to stand for 7 hours before use; weigh 3.0kg of expanded perlite with a particle size of 80 mesh, 400.0g of gum arabic, and 250μm carbon 1.6kg of powder is mixed and stirred evenly, then added to a white mud mixer and fully mixed to obtain a mixture; the mixture is aged for 2 days, and then made into a 25cm long, 20cm wide, and 4.5cm thick under a unidirectional pressure of 20Mpa. Green body: After the green body is dried in an electric heating circulation oven at 110°C, it is sintered in a high-temperature furnace at 1050°C for 2 hours, and then naturally cooled with the furnace to obtain permeable brick products. ...

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Abstract

The invention discloses a high-strength water permeable brick taking low-grade white mud and expanded perlite as main raw materials. The high-strength water permeable brick comprises low-grade white mud, expanded perlite, sodium hydroxide, sodium bicarbonate, acacia and carbon powder. The silicon-oxygen-aluminum framework structure of the water-permeable brick mainly utilizes a complex alkali activator solution to generate a gap, and the expansion perlite with different characteristics is utilized for regulating and controlling the foaming, water permeability and mechanical strength of the gumarabic and the carbon powder. The compressive strength of the permeable brick is 53Mpa-68Mpa, the water permeability coefficient is 2.3mm / s-3.7mm / s. The weather resistance, the freeze-thaw resistanceand the application comfort meet the current standards in the industry. The high-strength water permeable brick prepared by utilizing the low-grade white mud is suitable for the water-permeable paving road surface in the 'sponge city' construction of the country, not only can improve the high-efficiency utilization of the tailings in the mining process of non-metal ores, change waste into valuables, but also can play the role of environmental protection.

Description

technical field [0001] The invention belongs to the field of inorganic mineral composite materials and permeable pavement building materials, in particular to a method for preparing high-strength permeable bricks by using low-grade white mud and expanded perlite as main raw materials. Background technique [0002] With the development of society, especially the advancement of science and technology, the rapid development of social productivity has been greatly promoted; while the rapid development of society has brought people an increasingly abundant material life, it is also accompanied by excessive overdraft consumption of the environment. Some social negative Phenomena continue to emerge, such as global warming, smog and so on. [0003] In order to improve the utilization rate of energy and mineral resources, reduce environmental pollution and accelerate the construction of "sponge city" roads in my country, the research and development of permeable pavement building mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/132C04B33/13
CPCC04B33/1305C04B33/131C04B33/132C04B2235/3201C04B2235/3463C04B2235/422C04B2235/442C04B2235/96Y02P40/60
Inventor 田永尚唐旖天李水云刘鹏李天天孙书杰井强山
Owner XINYANG NORMAL UNIVERSITY
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