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A fire-free permeable brick prepared from waste slag and soil and its preparation process

A preparation process and technology of permeable bricks, which are applied in the field of building materials, can solve problems such as land resources and ecological environment damage, and achieve the effects of protecting the environment, reducing costs, and improving performance

Active Publication Date: 2020-08-28
蔡小三
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The accumulation of sludge and waste soil has caused great damage to land resources and ecological environment. Therefore, this problem needs to be solved urgently

Method used

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  • A fire-free permeable brick prepared from waste slag and soil and its preparation process

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preparation example Construction

[0030] In the preparation process of soil coagulant, different additives are added according to actual needs to achieve the required performance. Further, in a preferred embodiment of the present invention, the additive includes at least one of an activator, a coagulant, and a water reducer.

[0031] After the mixture is fully mixed with the soil coagulant to obtain materials, the materials are transported to an automatic molding machine for hydraulic molding to obtain bricks. According to needs, 140 ~ 145g / m 2 Spray the dispersion containing 0.5-1.5wt% silicone waterproof emulsion (Dow Corning, IE-6683), preferably, the dispersion is concentrated polytetrafluoroethylene dispersion (Guangzhou Songbai Chemical Co., Ltd.), so that the brick has a certain Waterproof, naturally stacked for 8 to 12 hours to make permeable bricks.

[0032] The present invention also provides a non-fired permeable brick prepared from waste slag and soil, which is prepared by the above-mentioned pre...

Embodiment 1

[0035] This example provides a fire-free permeable brick prepared from waste slag and soil, which is mainly produced by the following preparation process:

[0036] Use a drum screening device to screen the sludge and soil for the first time by washing with water, and screen out large impurities such as granular stones in the sludge and soil.

[0037] A thickener is used to mix the screened mud with a flocculant to solidify and coagulate the mud.

[0038] The mixture of mud and flocculant is extruded and dewatered by stacked screw extrusion device. Continuous dehydration is realized by means of extrusion and pressure to obtain a mixture with a water content of 30%.

[0039] Fully mix the dehydrated mixture with the soil coagulant at a mass ratio of 1:3, and harden the mixture to obtain the material.

[0040] The materials are transported to the automatic molding machine for hydroforming to obtain bricks, which are naturally stacked for 10 hours to produce permeable bricks.

Embodiment 2

[0042] This example provides a fire-free permeable brick prepared from waste slag and soil, which is mainly produced by the following preparation process:

[0043] The closed drum screening device is used to screen the sludge and soil for the first time by means of water flow washing, and the large impurities such as granular stones in the sludge and soil are screened out.

[0044] The sandy muddy water obtained from the first screening is screened for the second time by using a water wheel sand collecting device to remove the gravel and obtain mud and dregs with smaller particle sizes.

[0045] A thickener is used to mix the screened mud with a flocculant to solidify and coagulate the mud.

[0046] The mixture of mud and flocculant is extruded and dewatered by stacked screw extrusion device. Continuous dehydration is realized by means of extrusion and pressure to obtain a mixture with a water content of 20%.

[0047] Fully mix the dehydrated mixture with the soil coagulant ...

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Abstract

The invention provides a non-fired water-permeable brick produced with waste sludge and a production process thereof and relates to the technical field of building materials. The production process comprises: dewatering sludge by extruding, mixing with a clay coagulating agent, and making bricks. The clay coagulating agent is produced from cement, fly ash, anhydrous gypsum, and an anti-cementing agent. The production process is simple, good in controllability, low in production cost and suitable for large-scale production. The non-fired water-permeable brick produced with waste sludge is made from waste sludge, waste is made reasonable use, resources are saved, the cost is reduced, and the environment is protected. The non-fired water-permeable brick is widely applicable, is a novel ideal building material for construction of a sponge city, and has a promising application prospect.

Description

technical field [0001] The invention relates to the technical field of building materials, and in particular to a fire-free permeable brick prepared from waste slag and soil and a preparation process thereof. Background technique [0002] During the construction of shield tunneling in urban construction and subway construction, a large amount of mud and waste soil will be produced. At present, the treatment method of sludge and waste soil basically adopts that the sludge transport unit transports the produced sludge to the designated (mostly illegal) waste dumps for piling up, and some construction units also use the sludge generated by the on-site installation Equipment and chemical components are added to treat the mud, and then transported and disposed of. The essence of the disposal method is to treat the symptoms but not the root cause. The accumulation of sludge and waste soil has caused great damage to land resources and ecological environment. Therefore, this proble...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/16C04B38/00C04B41/62E04C1/00C04B111/20C04B111/40
CPCC04B28/16C04B41/009C04B41/4905C04B41/62C04B2111/00017C04B2111/00284C04B2111/0075C04B2111/2038C04B2111/40C04B2201/50E04C1/00C04B18/16C04B7/32C04B18/08C04B38/0038C04B2103/0068C04B7/00C04B41/4842C04B41/4543
Inventor 蔡小三
Owner 蔡小三
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