A kind of conductive concrete and preparation method thereof

A conductive concrete and stainless steel technology, applied in the field of building materials, can solve the problems of increasing the difficulty of the preparation process, poor radial performance, difficult to popularize and apply, etc., and achieve the effect of good grounding drainage effect, stable electrical conductivity and excellent electrical conductivity.

Active Publication Date: 2015-12-30
CHONGQING UNIV +1
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  • Abstract
  • Description
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Problems solved by technology

Although this invention can solve the above-mentioned problems of existing conductive concrete, because the axial direction performance of carbon nanotubes is better, but its radial direction performance is then very poor
It is difficult to keep them aligned in the axial direction by conventional methods, so their resistivity is high and their conductivity is poor
If in order to ensure its electrical conductivity, when it is added to concrete, it is necessary to arrange all the carbon nanotubes along the axial direction, which greatly increases the difficulty of the preparation process, resulting in an increase in cost and difficulty in popularization and application.

Method used

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  • A kind of conductive concrete and preparation method thereof

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preparation example Construction

[0034] a. Preparation of carbon-coated stainless steel fibers:

[0035] Take 20 parts of carbon precursor (a mixture of maltose, glucose and cellulose), put them in a stainless steel hydrothermal reaction kettle together with 100 parts of stainless steel fibers, and stir well, control the reaction temperature to 300 ° C, and the reaction time to 2 h. The final stainless steel fiber is centrifuged to obtain purified carbon-coated stainless steel fiber;

[0036] Put the carbon-coated stainless steel fibers that have been purified and separated into a stainless steel hydrothermal reaction kettle, add 2 parts of acrylic acid at the same time, control the reaction temperature to 200 degrees, and the reaction time is 2 hours. After the reaction, the stainless steel fibers coated with carboxyl groups on the surface are centrifugally separated and purified Obtain hydrophilic carbon-coated stainless steel fibers;

[0037] b. Put methyl cellulose, deionized water and the carbon-coated ...

Embodiment 7

[0044] The conductive concrete prepared according to the ratio of Example 1-Example 6 is tested as follows: Resistivity test: 39mm×45mm stainless steel meshes are respectively installed at both ends of the concrete as conductive electrodes during casting, and a resistance tester is used during the test. The test electrodes are respectively clamped with the electrodes at both ends of the 40mm×40mm×160mm conductive concrete module. After the test value of the resistance tester is stable, read the resistance value, which is the DC resistance R of the conductive concrete. The volume resistivity of conductive concrete is calculated using the formula Q=R(S / L), where S is the electrode area and L is the length of the conductive concrete.

[0045] Flexural strength test: Adjust the two movable supports of the flexural testing machine so that the distance from the center of the lower pressure head of the testing machine is 80 mm, and tighten the two supports. Put the side of the conduc...

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Abstract

The invention relates to the technical field of construction materials, and particularly relates to conductive concrete and a preparation method thereof. The conductive concrete comprises the following component: 1-10 parts of carbon-coated stainless steel fiber, 10-30 parts of 5R compound silicate cement, 10-30 parts of standard river sand, 1-5 parts of silica fume, 0.1-5 parts of methyl cellulose, 0.1-3 parts of polyether defoaming agent GPE, 5-30 parts of deionized water and 2-8 parts of gravel. The folding strength and compression strength of the concrete provided by the invention can reach the best levels of the prior art, and the resistivity is far superior to the existing level; and no expensive equipment is needed, the process flow is simple, and the production cost is low, thereby ensuring that the invention is more suitable for popularization.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to conductive concrete and a preparation method thereof. Background technique [0002] Conductive concrete is a new type of cement-based composite material that is formed by adding a certain amount of conductive component materials to ordinary concrete. It is composed of cementitious materials, conductive materials, dielectric aggregates and water, etc. A new type of concrete with specified electrical properties and certain mechanical properties. Conductive concrete not only has the characteristics of structural materials, but also has the characteristics of conductivity and alertness, which makes concrete not only used as a structural material, but also in electrician, industrial anti-static, building heating, electric heater, power equipment grounding engineering and major civil engineering. Facilities play an important role. [0003] Graphite is a good and easy-to-ob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B14/48C04B111/94
Inventor 李剑李勇袁涛王谦杨丽君吴高林廖瑞金陈超司马文霞杨庆黄正勇
Owner CHONGQING UNIV
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