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Red mud ceramsite-gold tailing sand-based color brick as well as preparation method and application thereof

A technology of gold tailings sand and red mud ceramsite, which is applied to pavement, roads, buildings and other directions paved with prefabricated blocks, can solve the problems of unfavorable sustainable development, poor thermal insulation performance, excessive specific gravity, etc., and achieve light weight and high Thermal insulation and shock resistance, effect of reducing dissolution

Pending Publication Date: 2021-10-08
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Most of the traditional colored bricks are made of cement, sand, and stone, which have the disadvantages of excessive specific gravity, poor thermal insulation performance, and labor-intensive, and the raw materials for production are mainly natural mineral resources, which is not conducive to sustainable development

Method used

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  • Red mud ceramsite-gold tailing sand-based color brick as well as preparation method and application thereof

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preparation example Construction

[0039] In the present invention, red mud is applied to the preparation of colored bricks. Firstly, red mud needs to be prepared into red mud ceramsite aggregate. In the present invention, red mud and solid waste-based sulphoaluminate cementitious materials, carbide slag and desulfurized gypsum are used Compounding, red mud ceramsite is made by dry pressing, the ceramsite is light in weight and has good mechanical properties.

[0040] In one or more embodiments, the curing temperature is 15 to 25°C, preferably 20°C, the air humidity is 93% to 97%, preferably 95%, and the curing time is 26 to 30 days, preferably 28 days, so as to fully Hydration ensures the performance of red mud-based aggregate.

[0041] In an embodiment of the present invention, the particle size distribution of the gold tailings sand is 100mm-200mm.

[0042] In an embodiment of the present invention, the colorant is an iron oxide pigment.

[0043] In an embodiment of the present invention, the water reducer...

Embodiment 1

[0054] Preparation of solid waste-based sulfoaluminate cementitious material:

[0055] Steel slag 20.61%, aluminum ash 24.74%, desulfurized gypsum 29.38%, limestone tailings 25.26%, the raw materials after grinding and homogenization are calcined at 1220°C in the kiln, and the holding time is 30min to obtain solid waste-based sulfoaluminate Cement clinker, the obtained solid waste-based sulphoaluminate cement clinker is ground with 4% desulfurized gypsum, and the solid waste-based sulphoaluminate cementitious material is prepared, which has the advantages of early strength, rapid hardening, low cost and environmental protection features.

[0056] Preparation of red mud ceramsite: 30% solid waste-based sulphoaluminate cementitious material, 60% Bayer red mud, 5% desulfurized gypsum, 5% carbide slag; 8% water of the total mass of solid waste raw materials; solid waste Sulphoaluminate-based cementitious material, Bayer red mud, desulfurized gypsum, and calcium carbide slag are m...

Embodiment 2

[0058] A preparation method of red mud ceramsite-gold tailing sand-based colored brick is as follows: use 15 parts of solid waste-based sulfoaluminate cementitious material, 78 parts of red mud ceramsite, 25 parts of gold tailing sand, and configure with a water-binder ratio of 0.30 The raw materials of the bottom layer are prepared according to 15 parts of solid waste-based sulfoaluminate cementitious materials, 38 parts of gold tailings, 0.2 parts of color retention agent, 1.5 parts of coloring agent, and 0.35 water-to-binder ratio. First add the material of the fabric layer to the bottom mold of the oscillating table, vibrate to make it dense, then add the raw material of the bottom layer, vibrate to make it dense, the thickness of the bottom layer is 55mm, and the thickness of the surface layer is 5mm; the standard curing temperature of the brick sample after demoulding is 20 ±0.5°C, humidity 98%, after curing for 28 days, perform performance test.

[0059] Performance tes...

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Abstract

The invention relates to the technical field of color bricks, in particular to a red mud ceramsite-gold tailing sand based color brick and a preparation method and application thereof. The color brick comprises a base layer and a surface layer. The base layer is prepared from, by mass, 15-25 parts of a solid waste based sulphoaluminate cementing material, 50-80 parts of red mud ceramsite and 25-30 parts of gold tailing sand, and the water-binder ratio is 0.30-0.35. The surface layer comprises, by mass, 15-25 parts of a solid waste-based sulphoaluminate cementing material, 22-38 parts of gold tailing sand, 0.2 parts of a color retention agent and 1-1.6 parts of a coloring agent, and the water-binder ratio is 0.35-0.4. The prepared color brick is light in weight, and the thermal insulation and anti-seismic properties are improved. All the raw materials are solid wastes, so that the color brick is more energy-saving and environment-friendly. In the base layer of the color brick, the gold tailing sand and the red mud ceramsite are jointly used as aggregate and compounded with the solid waste-based sulphoaluminate cementing material, harmful metal elements and the like in the gold tailing sand are hydrated and fixed through the hydration effect of the solid waste-based sulphoaluminate cementing material, and pollution of the gold tailing sand to the environment is reduced.

Description

technical field [0001] The invention relates to the technical field of colored bricks, in particular to a red mud ceramsite-gold tailings sand-based colored brick and a preparation method and application 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] Gold tailings are solid wastes discharged from gold ore after beneficiation or gold extraction process to recover gold or other useful components. Under normal circumstances, gold tailings are alkaline, and the content of silica in the tailings is relatively high. At the same time, it contains a part of aluminum oxide, iron oxide, and a small amount of metal elements such as silver, copper, and lead. With the devel...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B7/32E01C5/06
CPCC04B28/06C04B7/323E01C5/065C04B2111/0075C04B2201/50C04B18/027C04B18/12C04B2103/54C04B2103/0068
Inventor 王文龙吴长亮王坤张超王冠王旭江李敬伟蒋稳
Owner SHANDONG UNIV
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