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Electrostatic self-assembly carbon nano tube/nano-carbon black composite mortar as well as preparation method and application thereof

An electrostatic self-assembly and carbon nanotube technology, which is applied in the field of building materials, can solve the problems of reducing the material properties with a large amount of nanocarbon black, and the carbon nanotubes and nanocarbon black are not easy to disperse, etc., to achieve superior pressure sensitivity, pressure sensitive The effect of stability and energy saving

Active Publication Date: 2015-11-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that carbon nanotubes and nano carbon black are not easy to disperse in cement mortar, and the large amount of nano carbon black reduces the material performance, and provides a kind of carbon nanotube that is easy to disperse, low in amount, good in conductivity and pressure sensitivity. Electrostatic self-assembled carbon nanotubes / nanocarbon black composite mortar

Method used

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  • Electrostatic self-assembly carbon nano tube/nano-carbon black composite mortar as well as preparation method and application thereof
  • Electrostatic self-assembly carbon nano tube/nano-carbon black composite mortar as well as preparation method and application thereof
  • Electrostatic self-assembly carbon nano tube/nano-carbon black composite mortar as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The electrostatic self-assembled carbon nanotube / nanocarbon black composite mortar is prepared according to the following steps:

[0043] (1) Take 90 parts of raw material cement; 10 parts of silica fume; 4 parts of electrostatic self-assembled carbon nanotubes / nanocarbon black; 2.5 parts of water reducing agent; 150 parts of standard sand; 42 parts of water;

[0044] (2) Add electrostatically self-assembled carbon nanotubes / nanocarbon black, silica fume, water, water reducing agent, cement and standard sand in sequence in the cement mortar mixer, and stir evenly to obtain the mixture;

[0045] (3) Pouring the obtained mixture into a mould, then placing the mold on a vibrating table, vibrating to the surface of the mixture in the mould;

[0046] (4) According to the size of the mixture in the mould, insert the electrode used to connect the external circuit, and then vibrate slightly to ensure that the electrode and the mixture are in good contact;

[0047] (5) Put the ...

Embodiment 2

[0062] The electrostatic self-assembled carbon nanotube / nanocarbon black composite mortar is prepared according to the following steps:

[0063] (1) Take 90 parts of raw material cement; 10 parts of silica fume; 7 parts of electrostatic self-assembled carbon nanotubes / nanocarbon black; 2.5 parts of water reducing agent; 150 parts of standard sand; 56 parts of water;

[0064] (2) Add electrostatically self-assembled carbon nanotubes / nanocarbon black, silica fume, water, water reducing agent, cement and standard sand in sequence in the cement mortar mixer, and stir evenly to obtain the mixture;

[0065] (3) Pour the obtained mixture into the mould, then place the mold on the vibrating table, and vibrate to the surface of the mixture in the mould;

[0066] (4) According to the size of the mixture in the mould, insert the electrode used to connect the external circuit, and then vibrate slightly to ensure that the electrode and the mixture are in good contact;

[0067] (5) Put the...

Embodiment 3

[0076] The electrostatic self-assembled carbon nanotube / nanocarbon black composite mortar is prepared according to the following steps:

[0077] (1) Take 90 parts of raw material cement; 10 parts of silica fume; 10 parts of electrostatic self-assembled carbon nanotubes / nano carbon black; 2.5 parts of water reducing agent; 150 parts of standard sand; 72 parts of water;

[0078] (2) Add electrostatically self-assembled carbon nanotubes / nanocarbon black, silica fume, water, water reducing agent, cement and standard sand in sequence in the cement mortar mixer, and stir evenly to obtain the mixture;

[0079] (3) Pour the obtained mixture into the mould, then place the mold on the vibrating table, and vibrate to the surface of the mixture in the mould;

[0080] (4) According to the size of the mixture in the mould, insert the electrode used to connect the external circuit, and then vibrate slightly to ensure that the electrode and the mixture are in good contact;

[0081] (5) Put t...

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Abstract

The invention discloses electrostatic self-assembly carbon nano tube / nano-carbon black composite mortar. Raw materials of the mortar comprise cement, silica fume, electrostatic self-assembly carbon nano tubes / nano-carbon black, a water reducing agent, sand and water. The minimum static resistivity of the mortar reaches 0.45 omega*m, the range of an absolute value of the resistivity change rate is 3.3%-22.1%, the change range of stress sensitivity is 0.40%-2.69% / MPa, and the change range of the strain sensitivity is 105-704. Compared with the prior art, the electrostatic self-assembly carbon nano tube / nano-carbon black composite mortar and the preparation method thereof solve the problem about dispersion of nanofiller in the mortar very well, and the carbon nano tubes and the nano-carbon black have the collaborative conductive effect, so that the mortar can acquire very low static resistivity and has excellent pressure-sensitivity by the aid of a small mixing amount of electrostatic self-assembly carbon nano tubes / nano-carbon black.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to cement mortar composite materials, in particular to electrostatic self-assembled carbon nanotube / nano carbon black composite mortar and a preparation method thereof. Background technique [0002] Cement-based materials are the most widely used building materials. In recent years, large-scale buildings using cement-based materials as structural materials have been increasing. However, cement-based materials have the defects of poor tensile strength and low toughness, which bring great safety hazards to the application of cement-based materials. The destruction of buildings caused by the failure of cement-based materials will not only cause huge economic losses, but also may cause significant casualties. Nano carbon material has good corrosion resistance, mechanical properties and electrical properties. Among them, carbon nanotubes can not only improve the mechanical p...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B22/02
Inventor 韩宝国张立卿王云洋欧进萍
Owner DALIAN UNIV OF TECH
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