Technological process for preparing active powder concrete by using iron tailing

A technology of active powder and process method, which is applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc. It can solve the problems of consuming natural resources such as quartz sand or river sand, small sales radius, and transportation distance restrictions. Achieve the effect of improving comprehensive utilization rate, protecting ecological environment and reducing raw material cost

Active Publication Date: 2013-01-02
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low added value of the product, limited by the transportation distance and small sales radius, the enterprise cannot obtain better economic benefits
[0007] The purpose of the present invention is to use iron tailings to prepare active powder concrete, solve the problem of large consumption of natural resources such as quartz sand or river sand for active powder concrete materials, and expand the large-scale popularization and application of active powder concrete materials

Method used

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  • Technological process for preparing active powder concrete by using iron tailing
  • Technological process for preparing active powder concrete by using iron tailing
  • Technological process for preparing active powder concrete by using iron tailing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Use SiO 2 Iron tailings with a content of 69%, sieve 0.16mm~1.25mm iron tailings as iron tailings fine aggregate, and grind the remaining tailings to a specific surface area of ​​600m 2 / kg of activated iron tailings is used as the active powder component, and 42.5 ordinary Portland cement, specific surface area 450m 2 / kg of Grade II fly ash, specific surface area 20000m 2 / kg of silica fume, naphthalene series UNF-5 type superplasticizer is mixed, after the raw materials are selected, the components of the reactive powder concrete material are prepared according to the following weight (%):

[0035] 42.5 ordinary Portland cement 25;

[0036] Specific surface area 450m 2 / kg of Grade II fly ash 7.5;

[0037] Activated iron tailings 6.5;

[0038] Specific surface area 20000m 2 / kg of silica fume 5;

[0039] Iron tailings fine aggregate 44.2;

[0040] Naphthalene UNF-5 type superplasticizer 0.8;

[0041] Water 11.

[0042] After the components of the reactive powder concrete material...

Embodiment 2

[0051] Use SiO 2 Iron tailings with a content of 69%, sieve 0.16mm~1.25mm iron tailings as iron tailings fine aggregate, and grind the remaining tailings to a specific surface area of ​​600m 2 / kg of activated iron tailings is used as the active powder component, and it has a specific surface area of ​​450m with 52.5 ordinary Portland cement. 2 / kg of blast furnace slag, specific surface area 20000m 2 / kg of silica fume, naphthalene-based DNF type superplasticizer is mixed, and the components of the reactive powder concrete material are prepared according to the following weight (%) after the raw materials are selected:

[0052] 52.5 ordinary Portland cement 24

[0053] Specific surface area 450m 2 / kg of blast furnace slag 7.2;

[0054] Activated iron tailings 6;

[0055] Specific surface area 20000m 2 / kg of silica fume 4.8;

[0056] Iron tailings fine aggregate 47.15;

[0057] Naphthalene DNF type superplasticizer 0.85;

[0058] Water 10.

[0059] After the components of the reactive po...

Embodiment 3

[0068] Use SiO 2 72% of the iron tailings, the iron tailings of 0.08mm~1.25mm are screened as the iron tailings fine aggregate, and the remaining tailings are ground to a specific surface area of ​​580m 2 / kg of activated iron tailings is used as the active powder component, and 42.5 ordinary Portland cement, specific surface area 450m 2 / kg of Grade II fly ash, specific surface area 20000m 2 / kg of silica fume, 13mm copper-plated steel fiber special for reactive powder concrete, naphthalene UNF-5 type superplasticizer mixed, after the raw materials are selected, the components of the reactive powder concrete material are prepared according to the following weight (%):

[0069] 42.5 ordinary Portland cement 23.7;

[0070] Specific surface area 450m 2 / kg of Grade II fly ash 7.1;

[0071] Activated iron tailings 5.9;

[0072] Specific surface area 20000m 2 / kg of silica fume 4.7;

[0073] Iron tailings fine aggregate 41.55;

[0074] Copper-plated steel fiber special for 13mm reactive powd...

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Abstract

A technological process for preparing active powder concrete by using iron tailing is characterized by performing screening and mechanical-chemical activation to iron tailing, using partial iron tailing after screening as fine aggregate of the active powder concrete, using activated tailing as component of the active powder concrete, and preparing the active powder concrete. The invention substitutes partial cement, quartz powder and silica fume with mechanically-activated iron tailing and fly ash or slag, and quartz sand or river sand with screened iron tailing fine aggregate, and prepares high-strength active powder concrete under standard curing or high-temperature high-pressure curing condition; and compared with conventional method, the invention reduces raw material cost, improves iron tailing comprehensive utilization rate, reduces natural resource consumption amount, and promotes development of ecological environment protection and circular economy promotion.

Description

Technical field [0001] The invention relates to the technical field of using industrial solid waste to prepare concrete, in particular to a process method for preparing active powder concrete using iron tailings. Background technique [0002] Reactive powder concrete is a new type of cement-based composite material developed by Frenchman P. Richard in the 1990s. Reactive powder concrete has ultra-high compressive strength and high flexural strength, thus effectively overcoming the high brittleness of ordinary high-performance concrete, making it good in civil engineering, municipal, marine, nuclear power and other engineering and military facilities Application prospects. [0003] Improving the composition structure is an important way to improve the performance of concrete. Reactive powder concrete reduces the internal defects of the material by improving the activity and fineness of the components, improves the internal microstructure, and obtains high strength and high durabil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/12
CPCY02W30/91
Inventor 郑永超路国忠周红朱延臣郑学松
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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