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A kind of highly conductive graphite concrete

A technology of concrete and high electrical conductivity, applied in the field of building materials, can solve the problems of increased concrete mixing water, large slump loss, reduced water retention, etc., and achieves good mechanical properties and slump, small slump loss, Good water retention performance

Active Publication Date: 2021-09-24
HEILONGJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current prior art, the main use is to add graphite to concrete. After graphite is added to concrete, its particles are close to equiaxed and the aspect ratio is small. It is difficult to form a complete conductive network in concrete, and when the amount is large, due to the low strength of the conductive phase itself and the water absorption of the conductive phase material, the amount of concrete mixing water will increase significantly, and the strength of concrete at each age will drop significantly. The cohesion is weakened, the water retention is reduced, and the slump loss is large, so it is difficult to meet the requirements of civil engineering for mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A highly conductive graphite concrete, characterized in that it is made of the following raw materials in weight percentage, Portland cement 13%, water 20%, dispersant composition 5%, water retention component 3.8%, cohesive agent 1.4%, 9% graphite powder, 25% coal gangue, 10% gravel, and 12.8% sand.

[0035] The graphite powder is flake graphite, the particle size is 180 mesh, and the graphite purity is 99.5%.

[0036] The fineness modulus of coal gangue is 3.7, the fineness modulus of stone is 3.0, and the fineness modulus of sand is 2.0.

[0037] Dispersant composition comprises and is made up of the raw material of following percentage by weight:

[0038] Polyoxyethylene sorbitan monolaurate 20%, alkylphenol polyoxyethylene ether 10%, fatty alcohol polyoxyethylene ether sodium sulfate 70%.

[0039] The water-retaining component is a composition of glycerol and sorbitol, the percentage by weight of which is 70% of glycerol and 30% of sorbitol, and the concentration...

Embodiment 2

[0055] A kind of high conductivity graphite concrete, it is characterized in that, the weight percent of raw material in the embodiment is adjusted to, portland cement 5%, water 14%, dispersant composition 10%, water retention group 5.4%, cohesive agent 3.4%, 9% graphite powder, 34.2% coal gangue, 10% gravel, and 9% sand.

[0056] The preferred graphite powder is earthy graphite with a particle size of 200 mesh and a purity of 95%.

[0057] The fineness modulus of coal gangue is 2.0, the fineness modulus of stone is 3.0, and the fineness modulus of sand is 3.0.

[0058] Dispersant composition is made up of the raw material of following weight percent:

[0059] Sodium carboxymethyl cellulose 20%, sodium lignosulfonate 55%, sodium α-olefin sulfonate 25%.

[0060] The water-retaining component is a composition of glycerol and sorbitol, the percentage by weight of which is 50% of glycerol and 50% of sorbitol, and the concentration of sorbitol is 50%.

[0061] The cohesive agent...

Embodiment 3

[0071] As in Example 2, the graphite powder is earthy graphite with a particle size of 50 mesh and a purity of 99.5%.

[0072] The fineness modulus of coal gangue is 2.5, the fineness modulus of stone is 3.2, and the fineness modulus of sand is 2.5.

[0073] Dispersant composition is made up of the raw material of following weight percent:

[0074] Sodium carboxymethyl cellulose 10%, sodium lignosulfonate 55%, sodium α-olefin sulfonate 25-35%.

[0075] The water-retaining component is a composition of glycerol and sorbitol, the percentage by weight of which is 60% of glycerol and 40% of sorbitol, and the concentration of sorbitol is 60%.

[0076] In the preparation method, in step (2), add graphite powder after adding 70% of the formula amount of water, mix at room temperature, and stir evenly.

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PUM

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Abstract

The invention relates to a high-conductivity graphite concrete, which solves the problem that the resistance of the graphite-conductive concrete does not decrease significantly as the amount of graphite added increases. The invention includes the following raw materials in weight percentage, Portland cement 5-13%, water 14-20%, dispersant composition 0.3-10%, water retention component 3.8-5.4%, cohesive agent 1.4-3.4%, graphite Flour 6‑9%, coal gangue 25‑50%, gravel 10‑25%, sand 9‑28%. Graphite powder is flake graphite or earthy graphite, and the dispersant composition is compounded by nonionic surfactant and anionic surfactant. In the mixed system, there is no mutual overlap of flake graphite and graphite flakes. The prepared concrete has no chain loops and intermittent loops, and there is no insulating loop in the graphite-free area. The resistivity is less than 9Ω•m, and the compression resistance High strength, low slump loss.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a high-conductivity graphite concrete. Background technique [0002] With the development of engineering technology, conductive concrete has appeared in building construction, which solves the key technical problems that are difficult to solve in special projects. In the current prior art, the main use is to add graphite to concrete. After graphite is added to concrete, its particles are close to equiaxed and the aspect ratio is small. It is difficult to form a complete conductive network in concrete, and when the amount is large, due to the low strength of the conductive phase itself and the water absorption of the conductive phase material, the amount of concrete mixing water will increase significantly, and the strength of concrete at each age will drop significantly. The cohesion is weakened, the water retention is reduced, and the slump loss is large, which makes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/94C04B24/32C04B24/283C04B24/166C04B24/026C04B24/2652C04B18/12C04B14/024C04B14/02C04B14/06C04B24/383C04B24/16C04B24/18
Inventor 王宇崔璟宜陶鑫王学凯秦立达宋春莲
Owner HEILONGJIANG UNIV OF TECH