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Method for preparing concrete by taking manganese residue-steel residue-limestone powder as admixture

A technology of limestone powder and limestone, applied in the field of preparing high-performance concrete, to achieve the effects of reducing pollution, good durability, and saving resources

Active Publication Date: 2012-01-25
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there are no relevant research reports on the preparation of manganese slag fine powder, steel slag fine powder and limestone powder as concrete admixtures for high performance concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) The raw material is composed of cementitious material, aggregate, water reducer and water, and the mass percentages of cementitious material, aggregate and water are 18.3%, 72.5% and 9.2% respectively; wherein the mass percentage of cementitious material is composed of: 40% cement, 40% manganese slag, 10% steel slag, 10% limestone; mass percentage of coarse aggregate: 5-10mm: 30%; 10-20mm: 55%; 20-30mm: 15%; activator chemically pure NaOH It is 3.0% of the mass percentage of the cementitious material, and the water reducer NSO β-naphthalenesulfonic acid formaldehyde high condensate sodium salt is 1.5% of the mass percentage of the cementitious material; the sand fineness modulus is 2.6, the sand rate is 37%, and the water The rubber ratio is 0.50;

[0022] (2) Dry the manganese slag, steel slag and limestone until the moisture content is less than 1%, and put them into a ball mill to grind them to a specific surface area of ​​452m 2 / kg, 550m 2 / kg and 609m 2 / kg...

Embodiment 2

[0027] (1) The raw material is composed of cementitious material, aggregate, admixture and water, and the mass percentages of cementitious material and water are 21.2%, 69.3% and 9.5% respectively; wherein the mass percentage of cementitious material is composed of: cement 50%, Manganese slag 30%, steel slag 10%, limestone 10%; aggregate mass percentage: 5-10mm: 35%; 10-20mm: 55%; 20-30mm: 10%; The mass ratio is 40:60, taking 3.0% of the mass percentage of the cementitious material; the water reducing agent NSO β-naphthalenesulfonic acid formaldehyde high condensation product sodium salt is 2.0% of the mass percentage of the cementitious material; the sand fineness modulus is 2.6 , the sand ratio is 38%, and the water-binder ratio is 0.45;

[0028] (2) Dry the manganese slag, steel slag and limestone until the water content is less than 1%, and put them into a ball mill to grind them to a specific surface area of ​​495m 2 / kg, 611m 2 / kg and 792m 2 / kg;

[0029] (3) The ce...

Embodiment 3

[0033] (1) The raw material is composed of cementitious material, aggregate, admixture and water, and the mass percentages of cementitious material, aggregate and water are 24.2%, 66.1% and 9.7% respectively; wherein the mass percentage of cementitious material consists of: cement 60%, manganese slag 20%, steel slag 15%, limestone 5%; aggregate mass percentage: 5-10mm: 45%; 10-20mm: 45%; 20-30mm: 10%; water agent; the activator is chemically pure K2SO4 is 3.0% of the mass percentage of the gelling material; the water reducing agent NSO β-naphthalene sulfonic acid formaldehyde high condensate sodium salt is 2.0% of the mass percentage of the gelling material; the fineness modulus of fine aggregate The number is 2.8, the sand rate is 40%; the water-binder ratio is 0.40;

[0034](2) Dry the manganese slag, steel slag and limestone until the water content is less than 1%, and put them into a ball mill to grind them to a specific surface area of ​​495m 2 / kg, 611m 2 / kg and 792m ...

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Abstract

The invention discloses a method for preparing concrete by taking manganese residue-steel residue-limestone powder as admixture. Raw materials comprise cementing material, aggregate, admixture and water. The cementing material is formed by compounding cement, manganese residue, steel residue and limestone powder, and an activator is an alkaline activator or a sulphate activator, specific surface areas of manganese residue micro power, steel residue micro power and the limestone powder are respectively controlled to be 400-600m<2> / kg, 500-800m<2> / kg and 600-900m<2> / kg. Small particle size continuous grading coarse aggregate is adopted, and the content of 5-20mm broken stone is higher than 85%. The activator is dissolved in water in advance and is doped with mixing water. The obtained concrete has good working performance, strength in 28 days is improved by about 8% compared with the concrete which independently adopts fine slag powder, cost is reduced by nearly 20%, durabilities such as contractility resistance, freezing resistance, marine denudation resistance and the like can be obviously improved. The process in the invention is simple, C20-C60 grade concrete can be prepared, industrial waste residue doping content in the concrete can be obviously improved, and good practical value can be obtained.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a method for preparing high-performance concrete by using manganese slag-steel slag-limestone powder as admixtures. Background technique [0002] In recent years, research on high-performance concrete has focused on several aspects such as concrete structure design, low water-cement ratio, active mineral fine admixtures, and high-efficiency admixtures. Therefore, using industrial waste, natural minerals or composite mineral powder as concrete admixture is one of the effective means to realize the preparation of high-performance concrete. [0003] At present, solid industrial wastes such as slag, steel slag, fly ash, coal gangue, red mud, tailings and other solid industrial waste produced by the national iron and steel metallurgy, energy, nonferrous metals, and mining industries total 1.8 billion tons each year, but the comprehensive utilization rate is only...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/30
CPCY02W30/91
Inventor 陈平刘荣进王振军杨义欧俊黄小青蒋杉平邓玉莲明阳郭一锋
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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