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Preparation method for cement-based porous material comprising iron tailings and vitrified beads

A technology of vitrified microbeads and porous materials, applied in ceramic products, applications, household appliances, etc., can solve the problems of low strength, easy sinking, uneven distribution of materials, etc., and achieve easy large-scale production and convenient on-site construction , the effect of reducing production costs

Pending Publication Date: 2019-09-20
ENGINEERING RESEARCH INSTITUTE OF APPRAISAL AND STRENGTHENING SHANDONG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this kind of building material also has some disadvantages: because the iron tailings slag itself is heavy, if the amount added is too large, it will easily sink before the cement-based porous material hardens, and the overall distribution of the material after hardening is uneven; at the same time, the addition of iron tailings slag makes the cement-based porous material The bulk density of porous materials increases, and the thermal insulation performance decreases, making them unable to be well applied in the field of building energy conservation and thermal insulation
[0006] Conventional cement-based porous materials have low bulk density, good thermal insulation performance but low strength, and are generally widely used in the field of building energy conservation and thermal insulation, but are rarely used in other construction fields that require high load-bearing

Method used

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  • Preparation method for cement-based porous material comprising iron tailings and vitrified beads
  • Preparation method for cement-based porous material comprising iron tailings and vitrified beads
  • Preparation method for cement-based porous material comprising iron tailings and vitrified beads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The mix ratio is designed as follows:

[0058] Cement slurry mix ratio design: Ordinary Portland cement: Sulphoaluminate cement: Fly ash: Iron tailings slag: Vitrified microbeads: Water = 1:0.25:0.625:1.25:0.114:1.24 (mass ratio);

[0059] Cement paste: foam = 1:1.6 (volume ratio).

[0060] Preparation:

[0061] (1) Calculate the amount of raw materials according to the pre-determined mix ratio and the demand for cement-based porous materials, and then weigh cement, fly ash, iron tailings slag, vitrified beads, slurry mixing water, and foam preparation according to the calculated amount Water, foaming agent and other raw materials;

[0062] (2) foaming agent and water are mixed uniformly in a mass ratio of 1:70;

[0063] (3) Add water into the mixing bucket first, then add the weighed cement, fly ash, iron tailing slag, and vitrified microspheres into the bucket, and stir with an impact mixer for about 2 minutes until uniform;

[0064] (4) Start the foaming machine,...

Embodiment 2

[0077] The mix ratio is designed as follows:

[0078] Cement slurry mix ratio design: Ordinary Portland cement: Sulphoaluminate cement: Fly ash: Iron tailings slag: Vitrified microbeads: Water = 1:0.25:0.625:1.25:0.114:1.24 (mass ratio);

[0079] Cement paste: foam = 1:4.5 (volume ratio).

[0080] The specific preparation, molding, maintenance and testing methods are the same as in Example 1.

[0081] Performance measurement results:

[0082] ρ 湿 =512kg / m 3 , 7d compressive strength: 0.33MPa, 28d compressive strength: 0.51MPa, thermal conductivity λ=0.069W / (m 2 · K).

Embodiment 3

[0084] The mix ratio is designed as follows:

[0085] Cement slurry mix ratio design: Ordinary Portland cement: Sulphoaluminate cement: Fly ash: Iron tailings slag: Vitrified microbeads: Water = 1:0.125:0.3125:0.125:0.039:0.70.

[0086] Cement paste: foam = 1:1.1 (volume ratio).

[0087] The specific preparation, molding, maintenance and testing methods are the same as in Example 1.

[0088] Performance measurement results:

[0089] ρ 湿 =990kg / m 3 , 7d compressive strength: 2.68MPa, 28d compressive strength: 3.77MPa, thermal conductivity λ=0.115W / (m 2 · K).

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Abstract

The invention relates to a method for preparing a cement-based porous material comprising iron tailings and vitrified beads. The cement-based porous material comprises, by volume, 10 parts of cement slurry and 11-45 parts of foam, wherein the cement slurry comprises, by weight, 100 parts of ordinary Portland cement, 12-25 parts of sulphoaluminate cement, 30-65 parts of fly ash, 12-125 parts of the iron tailings, 4-12 parts of the vitrified beads and 70-124 parts of water. The method has the advantages that the iron tailings are used as one of main raw materials of the cement-based porous material, so that the production cost of the cement-based porous material is reduced, and the iron tailings are recycled comprehensively to achieve waste utilization and environmental protection effects.

Description

technical field [0001] The invention belongs to the field of preparation of cement-based porous materials, and in particular relates to a preparation method of cement-based porous materials added with iron tailings and vitrified microspheres. 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] Iron tailings are the waste after mineral processing and are the main component of industrial solid waste. According to incomplete statistics, more than 10 billion tons of tailings and waste rocks are discharged in the world every year. There are more than 8,000 state-owned mines and more than 110,000 township collective mines in China, with a stockpile of nearly 5 billion tons of tail...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B38/02C04B38/10C04B111/40
CPCC04B28/06C04B38/02C04B38/10C04B2111/00017C04B2111/40C04B2201/32C04B2201/50C04B7/02C04B18/08C04B18/12C04B14/22
Inventor 郭盼盼宁瑶瑶刘巧玲张鑫
Owner ENGINEERING RESEARCH INSTITUTE OF APPRAISAL AND STRENGTHENING SHANDONG JIANZHU UNIVERSITY
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