High-strength and high-toughness reactive powder concrete of carbon doped nano-tube and preparation method of high-strength and high-toughness reactive powder concrete

A carbon nanotube and active powder technology, applied in the field of active powder concrete and its preparation, can solve the problems of high cost and low compressive strength, achieve good bonding performance, improve cracking strength, and solve the effects of low tensile strength

Inactive Publication Date: 2014-09-10
浙江固邦新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a high-strength and high-toughness active powder concrete doped with carbon nanotubes. The cost of the active powder concrete in the prior art is relatively high, and in practical engineering applications, the compressive strength o...

Method used

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  • High-strength and high-toughness reactive powder concrete of carbon doped nano-tube and preparation method of high-strength and high-toughness reactive powder concrete
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  • High-strength and high-toughness reactive powder concrete of carbon doped nano-tube and preparation method of high-strength and high-toughness reactive powder concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment 1 (three products are arranged in this example, and its serial number is respectively marked as 1-1,1-2,1-3):

[0060] The active powder concrete doped with carbon nanotubes described in this implementation includes P O52.5 ordinary Portland cement, quartz powder, silica fume, S105 grade slag powder, silica sand, industrial water, water reducing agent, end hook steel fiber, carbon Nanotube, fly ash, carbon nanotube dispersant. The quality of each component is shown in Table 1 below, and Table 1 shows the mix ratio of carbon nanotube active powder concrete (shown in the table as the parts of each component quality):

[0061]

[0062] The preparation method of reactive powder concrete described in the present embodiment is as follows:

[0063] (1) The carbon nanotube powder and carbon nanotube dispersant described in Table 1 are added to the water required for mixing, and the resulting mixed solution is placed in an ultrasonic cleaning machine for 15 minute...

Embodiment 2

[0071] Embodiment 2 (two products are arranged in this example, its serial number is respectively marked as 2-1,2-2,2-3):

[0072] The active powder concrete doped with carbon nanotubes described in this implementation includes P O52.5 ordinary Portland cement, quartz powder, silica fume, S105 grade slag powder, silica sand, industrial water, water reducing agent, long straight steel fiber, carbon Nanotube, fly ash, carbon nanotube dispersant. The quality of each component is shown in Table 3 below, and the mixing ratio of the carbon nanotube-doped living powder concrete in Table 3 (shown in the table is the parts by weight of each component).

[0073]

[0074] The preparation method of reactive powder concrete described in the present embodiment is as follows:

[0075] (1) Add the weighed carbon nanotube powder and carbon nanotube dispersant into all the water according to Table 3, put them into an ultrasonic cleaner for 15 minutes of ultrasonic dispersion and use a centr...

Embodiment 3

[0082] Embodiment 3 (there are three products in this example, and its serial number is respectively marked as 3-1,3-2,3-3):

[0083] The active powder concrete doped with carbon nanotubes described in this implementation includes P O52.5 ordinary Portland cement, quartz powder, silica fume, S105 grade slag powder, silica sand, industrial water, water reducing agent, end hook steel fiber, carbon Nanotube, fly ash, carbon nanotube dispersant. The quality of each component is shown in Table 5 below, and Table 5 shows the mix ratio of carbon nanotube-doped active powder concrete (shown in the table is the parts by weight of each component).

[0084]

[0085] The preparation method of reactive powder concrete described in the present embodiment is as follows:

[0086](1) Add the carbon nanotube powder and carbon nanotube dispersant in Table 5 to all the water, place them in an ultrasonic cleaner for 15 minutes for ultrasonic dispersion, and use a centrifuge to accelerate preci...

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Abstract

The invention provides high-strength and high-toughness reactive powder concrete of a carbon doped nano-tube. The high-strength and high-toughness reactive powder concrete is prepared by taking cement, a carbon nano-tube, silica fume, a water reducing agent, silica sand, coal ash, quartz powder, steel fiber and water as raw materials, wherein all the components in the mixture are calculated in parts by mass: 1000-1200 parts of cement, 250-350 parts of silica fume, 250-350 parts of slag powder, 40-50 parts of water reducing agent, 1200-1400 parts of silica sand, 180-230 parts of water, 190-230 parts of steel fiber, 180-250 parts of coal ash, 80-120 parts of quartz powder, 0.1-5 parts of carbon-nano-tube dispersing agent and 1-10 parts of carbon nano-tube powder. The invention also provides a preparation method of the high-strength and high-toughness reactive powder concrete. The reactive powder concrete obtained by the invention has the high compression strength of 250-300MPa and breaking strength of 45-60MPa, which are higher than the 200-level related performances of the traditional RPC (Reactive Powder Concrete). Meanwhile, the initial cracking strength of the reactive powder concrete material prepared by using the carbon nano-tube is greatly improved and is up to 10MPa in a direct stretching state, and the tensile strain corresponding to peak stress is up to more than 0.5%, so that the toughness and strength of the traditional RPC material are greatly improved.

Description

technical field [0001] The invention relates to the field of building materials, and belongs to a cement-based composite material with ultra-high strength and high toughness, in particular to an active powder concrete doped with carbon nanotubes and a preparation method thereof. Background technique [0002] Reactive Powder Concrete (Reactive Powder Concrete) is a super-high-strength, high-durability, cement-based material developed in the 1990s by French Pierre Richard et al. using conventional materials following high-performance concrete. According to the principle of closest packing, RPC material adopts high-density cement-based uniform system model, uses 400-600 micron quartz sand as aggregate, and mixes a certain volume of micro-steel fiber and active minerals, and is equipped with forming pressure and heat treatment Conservation and other methods to prepare ultra-high-strength cement composite matrix materials. According to its composition and heat treatment method, ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/36
Inventor 李庆华徐世烺刘金涛
Owner 浙江固邦新材料有限公司
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