Conductive super high ductility cement-based composite material and preparation method thereof

A composite material and cement-based technology, which is applied in the field of construction engineering, can solve the problems of cracking of main cracks, reducing the continuity and stability of the conductivity of cement-based materials, etc., to achieve strong power-on and heating capabilities, continuous and stable conductive network connection reliability, Effect of improving electrical conductivity and crack control ability

Inactive Publication Date: 2019-04-16
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cement-based material only added with carbon fiber still has the characteristics of main cracks, which reduces the continuity and stability of the cement-based material's electrical conductivity.

Method used

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  • Conductive super high ductility cement-based composite material and preparation method thereof
  • Conductive super high ductility cement-based composite material and preparation method thereof
  • Conductive super high ductility cement-based composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This implementation example is used to test the uniaxial tensile properties of the prepared conductive ultra-high ductility cement-based composite material, and includes the following components in parts by weight:

[0041]

[0042]

[0043] It also includes polyethylene fibers with a volume content of 1.5% and carbon fibers with a volume content of 0.5%.

[0044] The cement is ordinary Portland cement or composite Portland cement, its 28-day compressive strength ≥ 52.5MPa, 28-day flexural strength ≥ 7.0MPa, specific surface area ≥ 300m 2 / kg.

[0045] Fly ash is a first-class fly ash with a specific surface area ≥ 700m 2 / kg, the density is 2.6g / cm 3 .

[0046] Quartz sand is superfine quartz sand, its specifications are 70-110 mesh, and the particle size is 0.1-0.15mm.

[0047] The particle size of the nano conductive carbon powder is 9-20nm, and the resistivity is 0.5-1.0Ω·m.

[0048] The length of the polyethylene fiber is 6mm-12mm, the diameter is 12-39μ...

Embodiment 2

[0055] This implementation example is used to test the uniaxial tensile properties of the prepared conductive ultra-high ductility cement-based composite material, and includes the following components in parts by weight:

[0056]

[0057] Also included are polyethylene fibers at a volume content of 1.7% and carbon fibers at a volume content of 0.8%.

[0058] The cement is ordinary Portland cement or composite Portland cement, its 28-day compressive strength ≥ 52.5MPa, 28-day flexural strength ≥ 7.0MPa, specific surface area ≥ 300m 2 / kg.

[0059] Fly ash is a first-class fly ash with a specific surface area ≥ 700m 2 / kg, the density is 2.6g / cm 3 .

[0060] Quartz sand is superfine quartz sand, its specifications are 70-110 mesh, and the particle size is 0.1-0.15mm.

[0061] The particle size of the nano conductive carbon powder is 9-20nm, and the resistivity is 0.5-1.0Ω·m.

[0062] The length of the polyethylene fiber is 6mm-12mm, the diameter is 12-39μm, the elastic ...

Embodiment 3

[0069] This implementation example is used to test the uniaxial tensile properties of the prepared conductive ultra-high ductility cement-based composite material, and includes the following components in parts by weight:

[0070]

[0071] It also includes 2% polyethylene fiber by volume and 1% carbon fiber by volume.

[0072] The cement is ordinary Portland cement or composite Portland cement, its 28-day compressive strength ≥ 52.5MPa, 28-day flexural strength ≥ 7.0MPa, specific surface area ≥ 300m 2 / kg.

[0073] Fly ash is a first-class fly ash with a specific surface area ≥ 700m 2 / kg, the density is 2.6g / cm 3 .

[0074] Quartz sand is superfine quartz sand, its specifications are 70-110 mesh, and the particle size is 0.1-0.15mm. The particle size of the nano conductive carbon powder is 9-20nm, and the resistivity is 0.5-1.0Ω·m.

[0075] The length of the polyethylene fiber is 6mm-12mm, the diameter is 12-39μm, the elastic modulus is ≥100GPa, the ultimate tensile s...

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Abstract

The invention discloses a conductive super high ductility cement-based composite material and a preparation method thereof. The cement-based composite material is prepared from, by weight, 40-45 partsof cement, 15-20 parts of a fly ash, 10-15 parts of quartz sand, 3-5 parts of nano-conductive carbon powder, polyethylene fiber with a volume fraction of1.5%-2% and a carbon fiber with a volume fraction of 0.5%-1%. The preparation method comprises the steps of 1) weighing each raw material according to a ratio; 2) dry-mixing the cement, the fly ash, the quartz sand and the nano-conductive carbonpowder, and adding water for wet-stirring to form cement matrix; 3) adding the carbon fiber and the polyethylene fiber to the cement matrix, uniformly stirring, and obtaining the conductive super highductility cement-based composite material after injection molding and mold release curing. The cement-based composite material has both high electrical conductivity and crack control capability, andis suitable for snowmelt de-icing on road surfaces.

Description

technical field [0001] The invention relates to a conductive ultra-high ductility cement-based composite material and a preparation method thereof, belonging to the technical field of construction engineering. Background technique [0002] In winter, snow and ice on urban roads, expressways and urban overpasses often have extremely adverse effects on traffic and transportation, seriously affecting road traffic safety. In the method of clearing snow and ice on the road, the traditional method is to use manual or mechanical physical deicing method, but it is often time-consuming and laborious, the removal is not thorough, and the efficiency is low, and the method itself also has safety aspects. The problem. In addition, there are chemical deicing methods, such as spraying salt solution on the road to melt snow, but these chemical sprays often severely corrode the steel bars of the concrete pavement, making the pavement easy to be denuded and damaged, and reducing the service ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/94C04B111/34
CPCC04B28/04C04B2111/0075C04B2111/343C04B2111/94C04B2201/50C04B18/08C04B14/06C04B14/022C04B14/386C04B16/0625
Inventor 潘金龙蔡景明姜波
Owner SOUTHEAST UNIV
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