Corrosion-resistant high-strength conductive concrete and preparation method thereof

A conductive concrete, high-strength technology, used in manufacturing tools, ceramic molding machines, etc., can solve the problems of unsuitable conductive concrete conductive medium, loss of conductivity, poor corrosion resistance, etc., to achieve good conductivity, strong conductivity, and stability. Good results

Active Publication Date: 2012-05-02
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Conductive concrete prepared by using conductive fillers such as ordinary steel fibers, steel slag (shavings), metal powder, etc., although conductive concrete with strong conductivity can be obtained, its disadvantage is poor corrosion resistance. Generally, after one year, due to the corrosion of metal materials And oxidation, its resistivity can increase to more than 60 times the initial value, basically loses its conductivity, and as time continues to prolong, its conductivity will further decrease
Therefore, ordinary steel fibers and metal powders are not suitable as conductive media for conductive concrete.

Method used

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  • Corrosion-resistant high-strength conductive concrete and preparation method thereof
  • Corrosion-resistant high-strength conductive concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Weigh the raw materials according to the following parts by weight: 50 parts of cement, 50 parts of river sand, 5 parts of graphite, 1 part of stainless steel fiber (4-8 microns in diameter, 3-6 mm in length), 40 parts of water, 5 parts of silica powder, Dispersant 0.1 part. Then follow the steps below to prepare conductive concrete:

[0047] 1) Dissolve the dispersant in water first, then put the stainless steel fiber in the water and stir thoroughly;

[0048] 2) Add cement, graphite and silicon micropowder to the mixed liquid obtained in step 1), and stir with the mixer quickly (285±10 rpm) for 5-6 minutes, and stir evenly;

[0049] 3) Add river sand to the mixture obtained in step 2), and stir with the mixer quickly (285±10 rpm) for 10-15 minutes, and stir evenly;

[0050] 4) Pour the cement mortar obtained in step 3) into such figure 1 molded in the mold shown;

[0051] 5) Release the mold after 24 hours of curing in the standard curing room, and cure to the spe...

Embodiment 2

[0054] Weigh raw materials according to the following parts by weight: 80 parts of cement, 80 parts of river sand, 15 parts of graphite, 5 parts of carbon fiber (4-8 microns in diameter, 3-6 mm in length), 70 parts of water, 8 parts of micro-silica powder, dispersed 0.5 parts of the agent. Then follow the steps below to prepare conductive concrete:

[0055] 1) Dissolve the dispersant in water first, then put the stainless steel fiber in the water and stir thoroughly;

[0056] 2) Add cement, graphite and silicon micropowder to the mixed liquid obtained in step 1), and stir it with a mixer at a rapid speed (285±10 rpm) for 5-6 minutes, and stir evenly;

[0057] 3) Add river sand to the mixture obtained in step 2), and stir with the mixer quickly (285±10 rpm) for 10-15 minutes, and stir evenly;

[0058] 4) Pour the cement mortar obtained in step 3) into such figure 1 molded in the mold shown;

[0059] 5) Release the mold after 24 hours of curing in the standard curing room, a...

Embodiment 3

[0062] Weigh the raw materials according to the following parts by weight: 100 parts of cement, 100 parts of river sand, 40 parts of graphite, 15 parts of stainless steel fiber (4-8 microns in diameter, 3-6 mm in length), 110 parts of water, 8 parts of silica powder, Dispersant 0.8 parts. Then follow the steps below to prepare conductive concrete:

[0063] 1) Dissolve the dispersant in water first, then put the stainless steel fiber in the water and stir thoroughly;

[0064] 2) Add cement, graphite and silicon micropowder to the mixed liquid obtained in step 1), and stir it with a mixer at a rapid speed (285±10 rpm) for 5-6 minutes, and stir evenly;

[0065]3) Add river sand to the mixture obtained in step 2), and stir with the mixer quickly (285±10 rpm) for 10-15 minutes, and stir evenly;

[0066] 4) Pour the cement mortar obtained in step 3) into such figure 1 molded in the mold shown;

[0067] 5) Release the mold after 24 hours of curing in the standard curing room, and...

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Abstract

The invention discloses corrosion-resistant high-strength conductive concrete and a preparation method thereof. The conductive concrete comprises, by weight, 50-150 parts of cement, 50-150 parts of aggregates, 5-90 parts of graphite, 1-30 parts of a conductive fiber, and 40-180 parts of water, wherein the conductive fiber comprises one or two of a stainless steel fiber and a carbon fiber. According to the conductive concrete, graphite and the conductive fiber are used as conductive fillers, characteristics of strong conductivity and good stability of graphite are utilized, and the conductive fiber, especially the stainless steel fiber and the carbon fiber, is added, so the strength of the concrete is increased, the conductivity and the corrosion resistance of the concrete are very good. The prepared conductive concrete has the advantages of low resistivity, good conductivity, corrosion resistance, high strength and the like. The concrete of the invention can be used for the power system grounding, the electromagnetic shielding and the like, and can be prepared into an earth electrode to replace traditional metal earth electrodes.

Description

technical field [0001] The invention relates to a conductive concrete and a preparation method thereof. Background technique [0002] Conductive concrete refers to a composite material mixed with gel material (usually cement), conductive material, dielectric aggregate (also called aggregate), water and other admixtures according to a certain mixing ratio. At present, the conductive fillers commonly used in the preparation of conductive concrete mainly include graphite, carbon fiber, steel fiber, steel slag (shavings), carbon black, metal and alloy powder, etc. Except for carbon fiber and steel fiber, the rest of the carbonaceous conductive media have an effect on the strength of concrete. However, materials such as ordinary steel fibers and metal powders are easily corroded, resulting in a significant decline in their electrical conductivity and strength over time. [0003] Graphite is a good and easy-to-obtain inorganic material. It not only has good electrical conductiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/48B28B1/00
Inventor 李剑龚奕宇司马文霞孙才新胡建林杨庆杜林周湶袁涛
Owner CHONGQING UNIV
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