Iron tailings foam concrete and preparation method thereof

A technology of foam concrete and iron tailings, which is applied in the field of foam concrete and foam concrete lightweight materials, can solve problems such as large safety hazards, environmental impact, casualties, etc., and achieve the effects of quality assurance, strength improvement, and strength enhancement

Active Publication Date: 2021-12-28
NORTHEASTERN UNIV LIAONING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stockpiling of tailings has a significant impact on the environment, and there are great potential safety hazards. Dam failures of tailings dams have occurred in many places across the country, causing a large number of casualties

Method used

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  • Iron tailings foam concrete and preparation method thereof
  • Iron tailings foam concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] In the present embodiment, the bulk density of the foamed concrete is 700kg / m 3 At that time, the proportion of mixing is as follows: cement is 360kg / m³, the content of composite admixture is 326kg / m³, the content of foam stabilizer is 2.1kg / m³, the content of water is 280kg / m³, the content of epoxy resin is 2.1kg / m³, The content of the alkaline activator is 14kg / m³, the foaming agent (YS-10 cement foaming agent and aluminum powder are mixed in 1:1; the fineness of the aluminum powder is 200-250 mesh, and the content of activated alumina is 85- 90%) with a content of 4.7kg / m³; the preparation method of the composite admixture: mechanically pulverize and finely grind the iron tailings, add an alkaline activator (using 95% to 98% NaOH and NaOH with a modulus of 1.3 2 SiO 3 mixed alkaline solution), then add fly ash and slag; by weight percentage, which contains 50% iron tailings, 18% slag, 30% fly ash, 2% alkaline activator. The iron tailings are high-silicon iron taili...

Embodiment 2

[0062] In the foamed concrete, when the bulk density of the foamed concrete is 800kg / m³, its compounding proportion is as follows: the cement content is 320kg / m³, the composite admixture content is 464kg / m³, the foam stabilizer content is 2.1kg / m³, water content of 320kg / m³, epoxy resin content of 3.4kg / m³, alkaline activator (using 95%~98% NaOH and NaOH with a modulus of 1.3 2 SiO 3 mixed alkaline solution) with a content of 16kg / m³, foaming agent (YS-10 cement foaming agent and aluminum powder mixed in 1:1; the fineness of the aluminum powder is 200-250 mesh, activated alumina The content is 85-90%) and the content is 4kg / m³; the preparation method of the composite admixture: mechanically pulverize and finely grind the iron tailings, add an alkaline activator (95%-98% NaOH and a modulus of 1.3 Na 2 SiO 3 mixed alkaline solution), then add fly ash and slag; by weight percentage, which contains 50% iron tailings, 18% slag, 30% fly ash, 2% alkaline activator . The iron tai...

Embodiment 3

[0066] In the foam concrete, the bulk density of the foam concrete is 900kg / m³, and its proportion is as follows: the cement content is 280kg / m³, the composite admixture content is 602kg / m³, the foam stabilizer content is 2.1kg / m³, the water content The content of epoxy resin is 360kg / m³, the content of epoxy resin is 4.3kg / m³, and the basic activator (using 95%~98% NaOH and NaOH with a modulus of 1.3 2 SiO 3 mixed alkaline solution) with a content of 18kg / m³; foaming agent (YS-10 cement foaming agent mixed with aluminum powder at 1:1; the fineness of the aluminum powder is 200-250 mesh, activated alumina The content is 85-90%) and the content is 3.4kg / m³; the preparation method of the composite admixture: mechanically pulverize and finely grind the iron tailings, add an alkaline activator (using 95%-98% NaOH and a modulus of 1.3Na 2 SiO 3 mixed alkaline solution), then add fly ash and slag. In terms of weight percentage, it contains 50% iron tailings, 18% slag, 30% fly as...

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Abstract

The invention belongs to the field of foam concrete and foam concrete lightweight materials, and specifically relates to an iron tailings foam concrete, which includes the following raw materials: cement 270-380kg / m³; composite admixture 310-610kg / m³; water 260-380kg / m³ m³; epoxy resin 1~5kg / m³; foaming agent 1~5kg / m³; foam stabilizer 1~3kg / m³. The preparation method of the composite admixture is as follows: the iron tailings are mechanically crushed and finely ground, an alkaline activator is added, and then fly ash and slag are added. The target product of the present invention has ideal thermodynamic properties, good compactness, strong durability, can prevent mold collapse, has higher load-bearing capacity and impact resistance, and has remarkable environmental protection performance.

Description

technical field [0001] The invention belongs to the field of foam concrete and foam concrete lightweight materials, and in particular relates to iron tailings foam concrete and a preparation method thereof. Background technique [0002] With the continuous development of foam concrete production and application, various kinds of foam concrete emerge in endlessly, and people's requirements for foam concrete are getting higher and higher. More and more people pay more and more attention to the thermodynamic properties of foam concrete. It is light in weight and requires higher load-bearing capacity and impact resistance. [0003] At present, the largest amount of solid waste produced in my country is tailings. There are 12,600 tailings ponds, and the stockpiles of tailings exceed 20 billion tons, with an annual increase of 600 million tons. The stockpiling of tailings has a major impact on the environment and poses a great safety hazard. Dam failures of tailings dams have occ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B38/02C04B12/04C04B18/08C04B18/12C04B18/14C04B22/04C04B22/06C04B24/28C04B24/38
CPCC04B28/04C04B24/281C04B24/383C04B18/12C04B22/04C04B22/062C04B12/04C04B18/08C04B18/141C04B2201/20C04B2201/50C04B2201/32C04B2103/0068C04B38/02Y02W30/91
Inventor 顾晓薇迟浩峰刘剑平胡子扬程建华
Owner NORTHEASTERN UNIV LIAONING
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