Red mud-based ceramsite concrete and preparation method and application thereof

A technology of ceramsite concrete and red mud, applied in cement production and other directions, can solve the problems of unfavorable development of circular economy, high consumption of ceramsite concrete resources and energy, and high cost, and achieve significant economic and environmental benefits, low cost of raw materials, low cost effect

Active Publication Date: 2020-06-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors found that these technologies mostly use cement, water, ceramsite, fine aggregate, additives, and coarse aggregate as raw materials, and do not use solid waste as raw material, resulting in high resource and energy consumption of ceramsite concrete. High cost, not conducive to the development of circular economy

Method used

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  • Red mud-based ceramsite concrete and preparation method and application thereof
  • Red mud-based ceramsite concrete and preparation method and application thereof

Examples

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no. 1 example

[0056] A preparation method of red mud-based ceramsite concrete, comprising the steps of:

[0057] (1) Acidification treatment of fly ash: use industrial tail gas (the mass concentration of carbon dioxide is between 9% and 15%) to compound the solid waste of step (2) under the conditions of temperature 200°C, humidity 80%, and pressure 2.5MPa The solid waste was subjected to acidification treatment for 4 hours. After the completion, the solid waste complex was dried, ground, and passed through a 150-mesh sieve to obtain modified fly ash.

[0058] (2) Preparation of the gelling material: in parts by weight, 600 parts of red mud soup, 300 parts of mineral powder and 100 parts of modified fly ash were evenly mixed to obtain the gelling material.

[0059] (3) Preparation of red mud-based ceramsite: According to parts by weight, 300 parts of red mud, 500 parts of Portland cement, and 200 parts of water were uniformly mixed and granulated into balls, and naturally cured for 24 hours...

no. 2 example

[0063] A preparation method of red mud-based ceramsite concrete, comprising the steps of:

[0064] (1) Acidification treatment of fly ash: use industrial tail gas (the mass concentration of carbon dioxide is between 9% and 15%) to compound the solid waste of step (2) under the conditions of temperature 370°C, humidity 90%, and pressure 0.5MPa The solid waste was subjected to acidification treatment for 12 hours. After the completion, the solid waste complex was dried, ground, and passed through a 150-mesh sieve to obtain modified fly ash.

[0065] (2) Preparation of the gelling material: in parts by weight, 500 parts of red mud soup, 400 parts of mineral powder and 100 parts of modified fly ash were evenly mixed to obtain the gelling material.

[0066] (3) Preparation of red mud-based ceramsite: According to parts by weight, 270 parts of red mud, 500 parts of Portland cement, and 200 parts of water were uniformly mixed and granulated into balls, and naturally cured for 20 hour...

no. 3 example

[0070] A preparation method of red mud-based ceramsite concrete, comprising the steps of:

[0071] (1) Acidification treatment of fly ash: use industrial tail gas (carbon dioxide mass concentration between 9~15%) to treat the solid waste compound of step (2) under the conditions of temperature 80°C, humidity 60%, pressure 2MPa Carry out acidification treatment for 30 hours. After completion, the solid waste complex is dried, ground, and passed through a 150-mesh sieve to obtain modified fly ash.

[0072] (2) Preparation of gelling material: in parts by weight, 400 parts of red mud soup, 400 parts of mineral powder and 200 parts of modified fly ash were evenly mixed to obtain the gelling material.

[0073] (3) Preparation of red mud-based ceramsite: According to parts by weight, 280 parts of red mud, 500 parts of Portland cement, and 160 parts of water were uniformly mixed and granulated into balls, and naturally cured for 20 hours to obtain a particle size of 5 Red mud-based ...

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Abstract

The invention relates to the technical field of preparation of ceramsite concrete, in particular to red mud-based ceramsite concrete and a preparation method and application thereof. The red mud-basedceramsite concrete is prepared from the following raw material components in parts by weight: 250 to 350 parts of a cementing material, 150 to 210 parts of wastewater, 350 to 500 parts of red mud-based ceramsite, 350 to 500 parts of fine aggregate, 100 to 150 parts of coarse aggregate and 5 to 20 parts of a water reducing agent, wherein the cementing material comprises the following components inpercentage by mass: 45-70% of red mud soup, 20-45% of mineral powder and 10-20% of fly ash. The ceramsite concrete with high strength performance is prepared by utilizing the synergistic effect of the solid wastes, the comprehensive utilization of multiple solid wastes is realized, the problem of a low resource utilization rate of the solid wastes is solved, the ceramsite concrete is more economical and environment-friendly, the preparation process is simpler and more efficient, the cost is low, and the ceramsite concrete has universality and is easy for large-scale production.

Description

technical field [0001] The invention relates to the technical field of preparation of ceramsite concrete, in particular to a red mud-based ceramsite concrete 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] With the vigorous development of economic construction, my country's major infrastructure construction has entered an unprecedented high-speed development period. While consuming a lot of resources, it also produces a lot of waste. The accumulation of a large amount of solid waste has seriously affected the regional ecological environment and society. economic development and residents' safety. The red mud produced in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08C04B7/26C04B7/147
CPCC04B7/147C04B7/26C04B28/082C04B2201/20C04B2201/50C04B22/0046C04B18/021C04B2103/302C04B18/12C04B18/142C04B18/16Y02P40/10
Inventor 李召峰高益凡张健刘超陈经棚
Owner SHANDONG UNIV
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