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Iron tailing large-slump high-strength conductive concrete and preparation method thereof

A conductive concrete and slump technology, which is applied in the field of building material concrete, can solve the problems of concrete strength and slump, reduce concrete strength, carbon fiber agglomeration, etc., achieve excellent particle gradation, improve electrical conductivity, and slump big effect

Active Publication Date: 2021-03-19
CHINA MCC17 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problem of carbon fiber conductive concrete is that the price is high on the one hand, and on the other hand, when the carbon fiber content is high, the uneven stirring will easily cause carbon fiber agglomeration, and a large number of air bubbles will be easily introduced during molding, thereby reducing the strength of the concrete; and its production process Dispersants and defoamers are usually required in
Although the above patents all use iron ore in the preparation of concrete, it is generally raw ore, not tailings. Tailings are solid waste of raw ore after crushing, grinding, magnetic separation, flotation, gravity separation and other procedures; In addition, the disclosed patent still inevitably needs to add carbonaceous conductive materials such as graphite to ensure the conductivity of the obtained concrete during the concrete preparation process, which will affect the strength and slump of the concrete

Method used

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  • Iron tailing large-slump high-strength conductive concrete and preparation method thereof
  • Iron tailing large-slump high-strength conductive concrete and preparation method thereof
  • Iron tailing large-slump high-strength conductive concrete and preparation method thereof

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preparation example Construction

[0055]A method of preparing a high-strength conductive concrete as described above with the above-mentioned steps of tail mine, including the following steps:

[0056]Step 1, weigh the raw material components according to the following: cement 250 ~ 450, silicon ash 30 ~ 60, fly ash 40 to 90, iron mine waste stone 1050 ~ 1180, iron tail ore 570 ~ 740, iron fine Powder 150 ~ 220, conductive promoter 3.2 to 12.0, expansion agent 25.6 to 60.0, aqueous dispersant 1.6 to 6.0, polycarboxylic acid water water water 7.8 ~ 10.8, water 170 to 175, wherein the unit is kg / m3.

[0057]Step 2, the weighing conductive accelerator, aqueous dispersant, and polycarboxylic acid water use are mixed into water;

[0058]Step three, weigh iron ore waste stone, iron tail ore, iron fine powder, cement, silica gray, fly ash and expansion agent were added to the mixer for 1min;

[0059]Step 4, the mixture obtained by stirring step di2 is added to the stirrer in the mixer, stirred for 2 min to the desired working perfor...

Embodiment 1

[0077]The conductive concrete components of the present embodiment are distributed, for examplefigure 2 Indicated.figure 2 In the middle, 1 is iron mine waste stone; 2 is limestone, its particle size is 5 ~ 25mm; 3 is iron tail ore; 4 is iron fine powder; 5 is natural sand, its fineness modulus is 1.8; 6 is carbon fiber That is, 6 mm short-cut carbon fiber; 7 is graphite, that is, 200 meteorite scales graphite powder; 8 is an expansion agent, i.e., UEA (U-type expansion agent); ⑨ is a defoamer, i.e., phosphate tributyl. In the present embodiment, the iron ore waste stone has a iron content of 20%, the particle size is 20 mm; the iron tail ore contains is 15%, the fineness modulus is 2.0; the iron-rich amount of iron powder is 60 %, Fine particles of 100 mesh.

[0078]The basic performance of the conductive concrete obtained by this embodimentimage 3 .

Embodiment 2

[0080]The conductive concrete components of the present embodiment are distributed, for examplefigure 2 Indicated. In this embodiment, the iron ore waste stone has a iron content of 15%, the particle size is 25 mm; the iron tail ore contains 10%, the fineness modulus is 1.8; the iron-rich amount of iron is 50 %, Fine particles of 200 mesh.

[0081]The basic performance of the conductive concrete obtained by this embodimentimage 3 .

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Abstract

The invention discloses iron tailing large-slump high-strength conductive concrete and a preparation method thereof, and belongs to the technical field of building material concrete. The conductive concrete comprises the following components in parts by weight: 250-450 parts of cement, 1050-1180 parts of coarse aggregate, 720-960 parts of fine aggregate, 70-150 parts of admixture, 25.6-60.0 partsof expanding agent, 1.6-6.0 parts of water-based dispersing agent, 4.8-10.8 parts of polycarboxylate superplasticizer and 170-175 parts of water, wherein the unit is kg / m3. By adopting the technical scheme provided by the invention, the requirements of mechanical properties, working properties and conductivity of the conductive concrete can be effectively met.

Description

Technical field[0001]The present invention belongs to the field of concrete technology, and more particularly to high strong conductive concrete with high slide of tailings and its preparation method thereof.Background technique[0002]Concrete has been widely used in the field of civil engineering due to its excellent physical and mechanical properties, and is a building material for current dosage. The electrical resistivity of ordinary concrete is high, and the resistivity is generally 10.6~ 109In the range of Ωcm, a poor conductor belonging to the electricity. For alternating current, dry concrete is a good insulator with a resistivity of about 10.13Ωcm. However, with the increase in moisture in the concrete, the resistivity of concrete decreases. When the concrete moisture is completely saturated, the resistivity of concrete can be reduced to 102~ 103Ωcm. Therefore, ordinary concrete is a material between the insulator and the conductor. If a certain amount of conductive componen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B111/90C04B111/94
CPCC04B28/02C04B2111/94C04B2111/905C04B2201/50C04B2111/00258C04B2111/00146C04B2111/00017C04B18/146C04B18/08C04B18/12C04B14/308C04B22/085C04B2103/408C04B2103/0068Y02W30/91
Inventor 何兆芳尹万云金仁才樊传刚钱元弟张峥
Owner CHINA MCC17 GRP
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