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High-conductivity composite grounding material and preparation method thereof

A composite grounding, high conductivity technology, applied in the field of power transmission, can solve the problems of low conductivity of cement-based conductive materials, easy passivation and corrosion of steel fibers, etc., to improve plasticity and water retention, improve grounding effect, Corrosion mitigation effect

Pending Publication Date: 2021-12-21
国网河南省电力公司直流中心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patent uses large-grained crushed stones as aggregates. Although it has certain conductivity, it is not suitable for places that require low grounding resistance. At the same time, ordinary steel fibers with large diameters are used as composite conductive materials. Easy to corrode, as the age of concrete increases, steel fibers are prone to passivation, and the conductivity of cement-based conductive materials will be further reduced

Method used

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  • High-conductivity composite grounding material and preparation method thereof

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Effect test

Embodiment 1

[0029] A high-conductivity composite grounding material, made of the following raw materials in parts by weight: 100 parts of gel material, 90 parts of aggregate fine sand, 30 parts of water, 0.3 parts of water reducing agent, 0.6 parts of defoaming agent, dispersant 0.6 parts, stainless steel fiber 1 part and carbon fiber 0.1 part.

[0030] The gel material is P.O42.5 Portland cement.

[0031] The water reducer is a polycarboxylate high-efficiency water reducer.

[0032] Described defoamer is tributyl phosphate.

[0033] Described dispersant is hydroxypropyl methylcellulose, and viscosity is 20 * 10 4 mPa s.

[0034] The stainless steel fibers are 316L stainless steel fibers with a diameter of 0.02-0.05mm and a length of 8-12mm.

[0035] The carbon fiber has a diameter of 100-200 nm and a length of 30-100 μm.

[0036] The preparation method of the above-mentioned high-conductivity composite grounding material comprises the following steps:

[0037] (1) Mix water reducer,...

Embodiment 2

[0043] A high-conductivity composite grounding material, made of the following raw materials in parts by weight: 100 parts of gel material, 90 parts of aggregate fine sand, 40 parts of water, 0.4 part of water reducer, 0.5 part of defoamer, dispersant 0.5 parts, stainless steel fiber 1.2 parts and carbon fiber 0.2 parts.

[0044] The gel material is P.O42.5 Portland cement.

[0045] The water reducer is a polycarboxylate high-efficiency water reducer.

[0046] Described defoamer is tributyl phosphate.

[0047] Described dispersant is hydroxypropyl methylcellulose, and viscosity is 20 * 10 4 mPa s.

[0048] The stainless steel fibers are 316L stainless steel fibers with a diameter of 0.02-0.05mm and a length of 8-12mm.

[0049] The carbon fiber has a diameter of 100-200 nm and a length of 30-100 μm.

[0050] The preparation method of the above-mentioned high-conductivity composite grounding material comprises the following steps:

[0051] (1) Mix water reducer, defoamer,...

Embodiment 3

[0057] A high-conductivity composite grounding material, made of the following raw materials in parts by weight: 100 parts of gel material, 100 parts of aggregate fine sand, 40 parts of water, 0.6 parts of water reducing agent, 0.5 parts of defoaming agent, dispersant 0.7 parts, stainless steel fiber 1.5 parts and carbon fiber 0.2 parts.

[0058] The gel material is P.O52.5 Portland cement.

[0059] The water reducer is a polycarboxylate high-efficiency water reducer.

[0060] Described defoamer is tributyl phosphate.

[0061] Described dispersant is hydroxypropyl methylcellulose, and viscosity is 20 * 10 4 mPa s.

[0062] The stainless steel fibers are 316L stainless steel fibers with a diameter of 0.02-0.05mm and a length of 8-12mm.

[0063] The carbon fiber has a diameter of 100-200 nm and a length of 30-100 μm.

[0064] The preparation method of the above-mentioned high-conductivity composite grounding material comprises the following steps:

[0065] (1) Mix water r...

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Abstract

The invention belongs to the technical field of power transmission, and particularly relates to a high-conductivity composite grounding material and a preparation method thereof. The high-conductivity composite grounding material is prepared from the following raw materials in parts by weight: 100 parts of a gel material, 90-110 parts of aggregate fine sand, 30-50 parts of water, 0.3-0.8 part of a water reducing agent, 0.5-1.0 part of a defoaming agent, 0.5-1.0 part of a dispersing agent, 1-2 parts of stainless steel fibers and 0.1-0.5 part of carbon fibers. According to the high-conductivity composite grounding material, stainless steel fibers and carbon fibers are adopted as composite conductive phase materials, the two conductive phase materials are complementary in performance, hydroxypropyl methyl cellulose is adopted as a dispersing agent, and the grounding effect of a grounding grid is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of electric power transmission, and in particular relates to a high-conductivity composite grounding material and a preparation method thereof. Background technique [0002] With the continuous expansion of the grid construction scale and the increasingly tight transmission corridors, it has become common to construct transmission lines in places with high soil volume resistivity (up to thousands). At the same time, during the implementation of the national networking strategy, the EHV / UHV power transmission and transformation system has increased rapidly, and the power transmission capacity has increased, and the requirements for fault current have also increased accordingly. In recent years, in order to reduce the grounding resistance, high-conductivity composite grounding materials are often used to improve grounding net grounding effect. Cement-based conductive composites refer to adding a certain amoun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/94
CPCC04B28/04C04B2111/94C04B2201/50C04B2201/52C04B14/06C04B14/48C04B14/386C04B24/003C04B24/383C04B2103/302
Inventor 王豫新任舟启聂晶李鹏荆扬蔡毅凡陈国杰吴嘉欣
Owner 国网河南省电力公司直流中心
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