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Coal gangue combined with iron tailings burn-free permeable brick and preparation method thereof

A technology for permeable bricks and coal gangue, which is applied in the field of coal gangue and iron tailings non-burning permeable bricks and its preparation, can solve the problems of high cost, poor durability, low strength, etc., and achieves fast curing rate and natural resource utilization. The effect of less and lower preparation temperature

Active Publication Date: 2022-04-05
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors have found that Portland cement is commonly used in non-fired permeable bricks at present, and there are still problems of high cost, low strength and poor durability.

Method used

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  • Coal gangue combined with iron tailings burn-free permeable brick and preparation method thereof
  • Coal gangue combined with iron tailings burn-free permeable brick and preparation method thereof
  • Coal gangue combined with iron tailings burn-free permeable brick and preparation method thereof

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Effect test

preparation example Construction

[0042] Another embodiment of the present invention provides a method for preparing the above coal gangue combined with iron tailings non-fired permeable bricks, including the following steps:

[0043] Prepare the surface layer mixture: mix the tunnel gangue aggregate, iron tailings sand, solid waste-based sulfoaluminate cementitious material, water reducing agent, and pigment to obtain the mixture, dissolve the curing agent in water, and dissolve the curing agent aqueous solution Add in the mixture and stir to obtain the surface layer mixture;

[0044] Preparation of base mix: mix excavation gangue aggregate, solid waste-based sulfoaluminate cementitious material, waste rock powder, water reducer and adhesive, and then add water to mix to obtain base mix;

[0045] First spread the surface layer mixture in the mold, then add the base layer mixture, and then static pressure molding to obtain the green body of the permeable brick, and maintain the green body of the permeable brick ...

Embodiment 1

[0065] A kind of coal gangue synergistic iron tailings permeable brick and its preparation method, such as figure 1 As shown, including surface layer preparation and base layer preparation.

[0066] Surface layer preparation: The surface layer includes the following weight groups: 60 parts of excavation gangue aggregate with a particle size of 1.25-2.5 mm, 20 parts of iron tailings sand with a particle size of 0.5-1.5 mm, and 20 parts of solid waste-based sulphoaluminate cementitious material. 0.2 parts, 0.2 parts of polycarboxylate superplasticizer, 3 parts of modified aliphatic amine epoxy curing agent, 2 parts of pigment; water-binder ratio 0.23.

[0067] Put the 1.25-2.5mm excavation gangue aggregate and 0.5-1.5mm iron tailing sand mass ratio of 2:1 after crushing and screening by the crusher, and put the solid waste-based sulphoaluminate gelling material, water reducer, and pigment into the mixer Dry mix for 60s, dissolve the curing agent in water, first add half of the ...

Embodiment 2

[0073] A coal gangue combined with iron tailings permeable brick and a preparation method thereof, including surface layer preparation and base layer preparation.

[0074] Surface layer preparation: The surface layer includes the following weight groups: 70 parts of excavation gangue aggregate with a particle size of 1.25-2.5 mm, 15 parts of iron tailings sand with a particle size of 0.5-1.5 mm, and 15 parts of solid waste-based sulphoaluminate cementitious material. 0.2 parts of polycarboxylate superplasticizer, 2 parts of modified aliphatic amine epoxy curing agent, 1 part of pigment; water-binder ratio 0.23.

[0075] Put the 1.25-2.5mm excavation gangue aggregate and 0.5-1.5mm iron tailing sand mass ratio of 2:1 after crushing and screening by the crusher, and put the solid waste-based sulphoaluminate gelling material, water reducer, and pigment into the mixer Dry mix for 60s, dissolve the curing agent in water, first add half of the total water consumption and stir slowly ...

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Abstract

The invention discloses a non-fired permeable brick with coal gangue combined with iron tailings and a preparation method thereof, which are a surface layer and a base layer in sequence from top to bottom; the surface layer raw materials include 60-70 parts of excavation gangue aggregate, 15-70 parts of iron tailings sand 25 parts, 15-20 parts of solid waste-based sulfoaluminate cementitious material, 0.16-0.24 parts of water reducer, 2-4 parts of curing agent and 1-2 parts of pigment; 1.25~2.5mm, the particle size of iron tailings is 0.5mm~1.5mm; base materials include 65~75 parts of excavation gangue aggregate, 15~20 parts of solid waste-based sulphoaluminate cementitious material, 5~20 parts of waste rock powder 15 parts, 0.16-0.24 parts of binder, 0.26-0.34 parts of water reducer; the particle size of the excavated gangue aggregate in the base is 2.5-5mm. The non-fired permeable brick prepared by the invention has good water permeability, high strength, low cost and better durability.

Description

technical field [0001] The invention belongs to the technical field of permeable bricks, and relates to a non-burning permeable brick with coal gangue combined with iron tailings and a preparation method thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Permeable brick is a century-old environmental protection building material product grandly born to solve urban surface hardening, create a high-quality natural living environment, and maintain urban ecological balance. [0004] Permeable bricks are divided into sintered permeable bricks and non-fired permeable bricks in terms of materials. The production process of sintered permeable bricks is relatively complicate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06
CPCC04B28/06C04B2111/00284C04B2111/0075C04B2201/50C04B18/12C04B24/281C04B2103/302C04B2103/54C04B2103/0054
Inventor 王文龙吴长亮冯美军王旭江李敬伟张超蒋稳张树文曲恒辉赵佃宝
Owner SHANDONG UNIV