Method for manufacturing high-activity mineral blending material and application thereof

A technology of mineral admixture and high activity, which is applied in the field of preparation of high activity mineral admixture, can solve the problems of increased water demand of concrete, single source of silica fume, increase of concrete shrinkage, etc., and achieves economic benefits and environmental protection. Excellent benefits, broad promotion and application prospects, and the effect of reducing production costs

Inactive Publication Date: 2008-08-20
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology improves the properties of cements made from recycled material such as demolished building blocks or construction scrap. It allows for stronger cables with fewer cracks when they break down over time compared to traditional methods like Portland cement. Additionally, its effectiveness increases beyond what was previously possible due to increased content of certain ingredients. Overall, these technical improvements result in improved durable structures containing strong reinforcement elements.

Problems solved by technology

This patents discusses different ways that can enhance the properties of concrete when mixed with certain materials like calcium carbonate (CaCO3). There may also exist other types of fillers such as vermiculite powder, talcs, clay, etc., but they have their own advantages over traditional methods for improving these characteristics. These improvements include improved hardness, reduced shrinking rates due to smaller sizes, better working conditions, less expensive raw material sources, lower costs compared to current alternatives, increased flexibility in mixing ratio adjustments based on environmental factors, and enhanced recycling potential.

Method used

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  • Method for manufacturing high-activity mineral blending material and application thereof

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Comparison scheme
Effect test

Embodiment 1

[0023] like figure 1 The preparation method of shown highly active mineral admixture of the present invention comprises following specific steps:

[0024] (1) Collect waste concrete, remove wood, plastic and other sundries therein, and use a hammer crusher to process concrete blocks into particles whose particle size is mainly distributed in 2-30mm as recycled aggregate;

[0025] (2) Utilize the friction between the grinder and the recycled aggregate during the high-speed rotation of the grinder to peel off and fall off the cement stone attached to the surface of the recycled aggregate, and then make the powder containing hardened cement stone with a particle size of 0.08-0.8mm Separation through grading and screening equipment, as raw materials for highly active mineral admixtures;

[0026] (3) Through the jet mill, the collected powder containing hardened cement stone is made into a Blaine specific surface area of ​​600-650m 2 / Kg ultrafine powder is the finished product.

Embodiment 2

[0029] like figure 1 The preparation method of shown highly active mineral admixture of the present invention comprises following specific steps:

[0030] (1) Collect waste concrete, remove impurities such as bricks, tiles, metals, etc., and use a jaw crusher to process concrete blocks into particles whose particle size is mainly distributed in the range of 2 to 40 mm as recycled aggregates;

[0031] (2) Using a particle shaping machine, through the high-speed self-impact (linear speed greater than 60m / s) and friction between the recycled aggregates, the cement stone attached to the surface of the recycled aggregate is peeled off and falls off, and the particle size of the hardened cement stone is contained. The powder with a thickness of 0.05-1mm is collected by the dust collector in the particle shaping machine and used as a raw material for highly active mineral admixtures;

[0032] (3) Process the obtained powder containing hardened cement stone through a jet mill to make

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Abstract

The invention belongs to the field of building material, which more particularly relates to a preparation method and application of a mineral admixture with high activity that takes wasted concrete as raw material. The preparation method of the mineral admixture with high activity comprises the following steps: (1) the wasted concrete is collected, the sundries are removed, and crushing equipment is used for processing concrete blocks into particle with diameter of being distributed in 2 to 40mm as recycled aggregate; (2) grinding or crushing equipment is used for striping and exfoliating the cement paste attached on the surface of the recycled aggregate, thus separating the formed powder with hardened cement stone and having diameter of 0.05 to 1mm to be the raw materials of the mineral admixture with high activity; (3) powder preparation equipment are used for processing the raw material further into superfine powder with Bertrand rate surface area not less than 600m<2>/Kg, that is the finished products of mineral admixture with high activity. The preparation method and application of a mineral admixture with high activity that takes wasted concrete as raw material has the advantages of good economy, high performance price ratio, large marketing need, good environmental protection and economy benefit, which has wide prospect for generalization and application.

Description

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Claims

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Application Information

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Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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