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High-strength porous water permeable brick and preparation method thereof

A high-strength, permeable brick technology, applied in the direction of manufacturing tools, clay products, ceramic products, etc., can solve the problems that the ground is not easy to dry, affects the water permeability of the brick body, and is easy to reverse osmosis, etc.

Pending Publication Date: 2020-10-27
GUIZHOU CONSTR SCI RES & DESIGN INST OF CSCEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the brick body is a non-fired brick, the particle size of the cinder is 0.5-1.0cm. After the cement is set, it becomes a solid brick body, and polyacrylamide is added to improve the adhesiveness of each component. The filling is dense, which affects the water permeability of the brick body, so the water absorption of the prepared brick is greater than the water permeability. When such a brick is laid in a city with a lot of rainfall, because it is mainly water absorption, it is easy to reverse osmosis after water absorption. , so that the ground is not easy to dry or even accumulate water after raining

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Coal slag carbon reduction treatment:

[0025] a. adding water to quicklime and stirring it, leaving it to stand for stratification, taking off the suspension in the lower layer and vacuum-drying until the water content is 45%, so as to obtain milk of lime;

[0026] b. Activation: Grind the coal slag, add 1.5% sodium sulfate after magnetic separation, mix and grind it with milk of lime of the same quality as the coal slag, filter out the oozing water during the process, and roast at 150°C for 1.5h , crushed after cooling.

[0027] 2. Shale modification:

[0028] a. Crush the shale into coarse grains with a particle size of 4 mm, calcining at 90°C for 80 minutes, taking it out, calcining at 230°C for 15 minutes, and then calcining at 160°C for 35 minutes;

[0029] b. When the calcined shale coarse grains are cooled to 70°C, hydrogen peroxide is added dropwise, and when no air bubbles appear, the shale coarse grains are dried and pulverized for grinding to obtain mod...

Embodiment 2

[0037] Specifically, it is realized through the following technical solutions:

[0038] 1. Coal slag carbon reduction treatment:

[0039] a. add quicklime to water and stir, then let it stand for stratification, take off the lower layer of suspension and vacuum-dry until the water content is 50%, to obtain milk of lime;

[0040] b. Activation: Crush the cinder, add 2% sodium sulfate after magnetic separation, then mix and grind it with milk of lime of the same quality as the cinder, filter out the oozing water during the process, and roast at 170°C for 1 hour. After cooling, crush it.

[0041] 2. Shale modification:

[0042] a. Crush the shale into coarse particles with a particle size of 5 mm, calcining at 110°C for 65 minutes, taking it out, calcining at 240°C for 10 minutes, and then calcining at 170°C for 30 minutes;

[0043]b. When the calcined shale coarse grains are cooled to 80°C, hydrogen peroxide is added dropwise, and when no air bubbles appear, the shale coarse ...

Embodiment 3

[0051] Specifically, it is realized through the following technical solutions:

[0052] 1. Coal slag carbon reduction treatment:

[0053] a. add quicklime to water and stir, then let it stand for stratification, take off the suspension in the lower layer and vacuum-dry until the water content is 40%, to obtain milk of lime;

[0054] b. Activation: Crush the cinder, add 1% sodium sulfate after magnetic separation, mix and grind it with milk of lime of the same quality as the cinder, filter out the oozing water during the process, and roast at 130°C for 2 hours. After cooling, crush it.

[0055] 2. Shale modification:

[0056] a. Crush the shale into coarse particles with a particle size of 2 mm, calcining at 70°C for 90 minutes, taking it out, calcining at 220°C for 20 minutes, and then calcining at 150°C for 30 minutes;

[0057] b. When the calcined shale coarse grains are cooled to 60°C, hydrogen peroxide is added dropwise until no air bubbles appear, then the shale coarse...

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PUM

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Abstract

The invention belongs to the field of building materials, and particularly relates to a high-strength porous water permeable brick and a preparation method thereof. Industrial coal slag is subjected to carbon reduction treatment, and shale is subjected to modification treatment; the content of fixed carbon in coal cinder is reduced, the high-strength porous water permeable brick is prepared through the steps of grinding, aging, pulping, extrusion molding, firing and the like, the compressive strength reaches 31 MPa, the water permeability coefficient reaches 5.01 * 10 <-2 > cm / s, the heat conductivity coefficient reaches 0.65 W / m < 2 >. K, and the volume density is 1350 kg / m < 3 >. The high-strength porous water permeable brick can be used for paving a sponge city road, and can also be used for building a building bearing wall.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a high-strength porous permeable brick and a preparation method thereof. Background technique [0002] Permeable bricks: also known as permeable bricks, Dutch bricks, etc., are green and environmentally friendly new building materials. The raw materials are mostly made of environmentally friendly materials such as cement, sand, slag, and fly ash. High-pressure forming; the whole brick is compressed at one time and must not be layered Press to form homogeneous bricks that are consistent from top to bottom and not layered. Good water permeability, strong anti-skid function; natural and long-lasting color; low maintenance cost, easy to replace, convenient for laying pipelines under the road surface; various colors and shapes, matching with the surrounding environment, natural and beautiful. Traditionally, shale, coal gangue, and fly ash are mixed and fired. The fired b...

Claims

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Application Information

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IPC IPC(8): C04B33/13C04B33/135C04B33/04C04B38/02E01C5/06E01C11/22E04C1/00B28B3/00B28B3/20
CPCE01C5/065E01C11/225E04C1/00B28B3/006B28B3/20C04B38/02C04B33/13C04B33/1352C04B33/04C04B33/131C04B33/1305C04B2235/96C04B38/0067Y02P40/60
Inventor 崔晨朱国良帅海乐聂晓鹏杨兴廖昶陈亦苏罗通周灵何信周徐立斌李泽钢
Owner GUIZHOU CONSTR SCI RES & DESIGN INST OF CSCEC
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