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Low-cost carbon fiber reinforced concrete and preparation method and application thereof

A technology of reinforced concrete and carbon fiber, which is applied in the field of building materials, can solve the problems of not promoting the large-scale application of carbon fiber and application limitations, and achieve the effects of high toughness, simple preparation process and high quality

Active Publication Date: 2012-12-19
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on this, carbon fiber cement-based materials have gained more and more attention, but the focus is on research on alertness or intelligence, such as pressure sensitivity, heat sensitivity, and electromagnetic shielding, etc. Although these studies have given carbon fiber cement-based materials However, due to the high requirements for carbon fiber performance and its application is limited to a specific field or key project, it has not promoted the large-scale application of carbon fiber
However, the research on the application of low-cost carbon fiber has not yet been carried out. Whether it can also be used and function in cement composite materials like high-performance ordinary carbon fiber, and what technical difficulties should be overcome when using it, etc., need to be solved. Therefore, low-cost The high-efficiency application and performance improvement research of low-cost carbon fiber in cement-based materials has strong engineering significance

Method used

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  • Low-cost carbon fiber reinforced concrete and preparation method and application thereof
  • Low-cost carbon fiber reinforced concrete and preparation method and application thereof

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preparation example Construction

[0036] The preparation method of the low-cost carbon fiber reinforced concrete provided by the present invention may comprise the following steps:

[0037] 1) Mix low-cost carbon fiber (F) and dispersant (B) thoroughly first, then add to cement (A) and mix evenly;

[0038] 2) Put the sand, stone (E), and the mixture obtained in step 1) into the mixer in turn for dry mixing, then add the polycarboxylate water reducer (C) to the mixing water (D) and mix evenly, and then mix them together Add it into the blender and continue to stir, and get the product after mixing.

[0039] In the above preparation method, the stirring method in step 2) is: after adding the mixture obtained in sand, stone (E) and step 1), start the mixer for dry mixing for 30 seconds, stop the mixer, and then premix the Add the mixing water with polycarboxylate superplasticizer and continue stirring for 180 seconds.

Embodiment 1

[0042] Embodiment 1: Preparation of low-cost carbon fiber reinforced concrete (calculated by 30L)

[0043] The following method is used to prepare low-cost carbon fiber reinforced concrete, and the specific method includes the following steps:

[0044] 1) Weighing and retrieving materials: PI cement 12.3Kg (purchased from Beijing Xingfa Cement Co., Ltd.); dispersant fly ash 2.3Kg (purchased from Ausmelt Technology (Beijing) Co., Ltd.); agent (99% allyl alcohol polyoxyethylene ether+1% carbon alcohol) 62g (purchased from Beijing Haima Chemical Co., Ltd.); water 3.7Kg (tap water); sand 21.3Kg; stone 32.4Kg; low-cost carbon fiber 960g (purchased from Jiangsu Zhongfu Shenying Carbon Fiber Co., Ltd.).

[0045]2) Mix the low-cost carbon fiber and dispersant thoroughly first, then add it to the cement and mix evenly. The mixing process is carried out in a mixer, and the mixing time is not less than 1 minute to ensure uniform mixing.

[0046] 3) In the first layer, sand and stone ar...

Embodiment 2

[0048] Embodiment 2: Preparation of low-cost carbon fiber reinforced concrete (calculated by 30L)

[0049] The following method is used to prepare low-cost carbon fiber reinforced concrete, and the specific method includes the following steps:

[0050] 1) Weighing and retrieving materials: PI cement 13.5Kg (purchased from Beijing Xingfa Cement Co., Ltd.); dispersant slag 770g (purchased from Osmet Technology (Beijing) Co., Ltd.); sand 19.8Kg; stone 33.2Kg; water 4.7Kg (tap water); Polycarboxylate superplasticizer (polyether modified silicon of 95% polyethylene glycol acrylic acid ester+5%) 189g (purchased from Beijing Haima Ding Co., Ltd.); Low-cost carbon fiber 480g (purchased from Jiangsu Zhongfu Shenying Carbon Fiber Co., Ltd.).

[0051] 2)-3) are the same as in Example 1.

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Abstract

The invention discloses low-cost carbon fiber reinforced concrete and a preparation method and application thereof. The low-cost carbon fiber reinforced concrete is prepared from six components: 410-510kg / m<3> of cement (A); dispersant (B) accounting for 5wt%-15wt% of cement; water reducing agent (C) accounting for 0.5%-2.0% of the total weight of the component A and the component B; water (D) accounting for 30wt%-40wt% of cement; sand and stones (E); and low-cost carbon fiber (F) accounting for 0.5vol.%-2vol.% of the concrete, wherein according to that 1m<3> of the concrete is 2400kg, the sum of the total weight of sand and stones and the total weight of the component A, the component B and the component D is 2400kg, and sand accounts for 30%-40% (sand rate) of the total weight of sand and stones. In the preparation method disclosed by the invention, the high mechanical properties of carbon fiber is fully utilized to increase the toughness of the concrete; the single-recipe preparation cost of the carbon fiber concrete is reduced by 50%; and the low-cost carbon fiber reinforced concrete has the advantages of good quality, simple preparation process, low cost and the like, and is suitable for wide popularization and application.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a low-cost carbon fiber reinforced concrete and its preparation method and application. Background technique [0002] With the continuous improvement of the level of modernization, people put forward higher requirements for modern buildings such as high-rise and long-span. In order to realize these requirements, the specific strength of cement-based composite materials needs to be further improved. Composite is an important way to achieve high performance of cement-based materials, and fiber reinforcement is its core. Therefore, major breakthroughs have been made in the research of fiber reinforced cement composite materials at home and abroad. [0003] Because asbestos fibers are easy to cause cancer, glass fibers cannot maintain stability in alkaline environments, and steel fibers are prone to corrosion of steel bars, all of which limit their large-scale...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B14/38
CPCC04B28/04C04B2103/408Y02W30/91C04B14/02C04B14/06C04B14/386C04B2103/302C04B24/2641C04B18/08C04B18/141C04B18/146
Inventor 姚燕吴浩王玲高春勇
Owner CHINA BUILDING MATERIALS ACAD