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Carbon-series micro-nano graded cross-scale fiber reinforced cement mortar and preparation method thereof

A fiber-reinforced cement, cross-scale technology, applied in the field of carbon-based micro-nano graded cross-scale fiber-reinforced cement mortar and its preparation, can solve the problems of difficult uniform dispersion, easy peeling, pull-out damage, etc., and achieve the goal of improving mechanical properties Effect

Inactive Publication Date: 2021-06-29
AIR FORCE UNIV PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the surface of the original carbon fiber is smooth and chemically inert, so it is difficult to achieve effective interfacial bonding with the cement-based composite matrix. Under the action of impact load, the carbon fiber and the matrix are prone to peeling, pulling out and damage, which affects the macroscopic mechanical properties of carbon fiber cement mortar. ; Moreover, in the process of carbon fiber doping, agglomeration and winding are prone to occur, and it is difficult to achieve uniform dispersion in the material matrix, resulting in unstable electrical conductivity of the prepared mortar, so the improvement effect of carbon fiber on cement mortar is limited

Method used

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  • Carbon-series micro-nano graded cross-scale fiber reinforced cement mortar and preparation method thereof

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Effect test

Embodiment 1

[0031] A carbon-based micro-nano graded cross-scale fiber-reinforced cement mortar is made of the following substances in corresponding parts by weight:

[0032] 1 part of micro-nano graded cross-scale fiber, 700 parts of cement, 1200 parts of sand, 7 parts of water reducer, 1 part of defoamer, 3 parts of dispersant, 220 parts of water.

[0033] The preparation method of the micro-nano hierarchical cross-scale fiber includes the following steps:

[0034] (1) carbon fiber desizing treatment;

[0035] Based on the Soxhlet extraction method, use acetone to extract the carbon fiber tow, remove the sizing agent on its surface, take out the carbon fiber after 48 hours, then put it into absolute ethanol and wash it three times, then put it into deionized water and wash it three times, and finally put it in Dry in a constant temperature drying oven for later use.

[0036] (2) Preparation of carbon nanotube dispersion;

[0037] The carbon nanotubes and cetyltrimethylammonium bromide...

Embodiment 2

[0050] A carbon-based micro-nano graded cross-scale fiber-reinforced cement mortar is made of the following substances in corresponding parts by weight:

[0051] 2.64 parts of micro-nano graded cross-scale fibers, 766 parts of cement, 1280 parts of sand, 7.66 parts of water reducer, 1.53 parts of defoamer, 3.06 parts of dispersant, and 230 parts of water.

[0052] The preparation method of the micro-nano hierarchical cross-scale fiber includes the following steps:

[0053] (1) carbon fiber desizing treatment;

[0054] Based on the Soxhlet extraction method, use acetone to extract the carbon fiber tow, remove the sizing agent on its surface, take out the carbon fiber after 48 hours, then put it into absolute ethanol and wash it three times, then put it into deionized water and wash it three times, and finally put it in Dry in a constant temperature drying oven for later use.

[0055] (2) Preparation of carbon nanotube dispersion;

[0056] Mix carbon nanotubes and hexadecyltrim...

Embodiment 3

[0069] A carbon-based micro-nano graded cross-scale fiber-reinforced cement mortar is made of the following substances in corresponding parts by weight:

[0070] 4 parts of micro-nano graded cross-scale fiber, 800 parts of cement, 1300 parts of sand, 8 parts of water reducer, 2 parts of defoamer, 4 parts of dispersant, 240 parts of water.

[0071] The preparation method of the micro-nano hierarchical cross-scale fiber includes the following steps:

[0072] (1) carbon fiber desizing treatment;

[0073] Based on the Soxhlet extraction method, use acetone to extract the carbon fiber tow, remove the sizing agent on its surface, take out the carbon fiber after 48 hours, then put it into absolute ethanol and wash it three times, then put it into deionized water and wash it three times, and finally put it in Dry in a constant temperature drying oven for later use.

[0074] (2) Preparation of carbon nanotube dispersion;

[0075] The carbon nanotubes and cetyltrimethylammonium bromi...

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Abstract

The invention discloses a carbon-series micro-nano graded cross-scale fiber reinforced cement mortar, and belongs to the technical field of cement mortar preparation. The cement mortar is prepared from the following substances by weight: 1-4 parts of micro-nano graded cross-scale fiber, 700-800 parts of cement, 1200-1300 parts of sand, 7-8 parts of a water reducer, 1-2 parts of an antifoaming agent, 3-4 parts of a dispersant, and 220-240 parts of water. The carbon-series micro-nano graded cross-scale fiber reinforced cement mortar prepared by the invention has more excellent mechanical and electrical properties.

Description

technical field [0001] The invention belongs to the technical field of cement mortar preparation, in particular to a carbon-based micro-nano graded cross-scale fiber-reinforced cement mortar and a preparation method thereof. Background technique [0002] Cement mortar is one of the most important cement-based composite materials in the field of civil engineering construction today, and is widely used in national defense, civil air defense projects and civil construction projects. However, traditional cement mortar has disadvantages such as high brittleness, easy cracking, low tensile strength, poor impact resistance, and single function. The increasingly complex and changeable modern battlefield environment requires the performance and safety performance of military protection engineering. In order to break through the bottleneck of practical application of traditional mortar in engineering construction due to its own defects, it is urgent to further improve the mechanical ...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B20/02C04B14/02C04B14/38
CPCC04B28/00C04B20/023C04B14/386C04B14/026C04B2201/50C04B14/06C04B2103/302C04B2103/50C04B2103/408
Inventor 夏伟许金余陆松姚廒杜宇航
Owner AIR FORCE UNIV PLA
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