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Fiber-enhanced cement-based composite material

A fiber-reinforced cement and composite material technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of high brittleness, inconvenient construction and maintenance, and achieve the effect of high interfacial bond strength

Inactive Publication Date: 2015-09-16
JIUQING PAINT SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ultra-high performance concrete mainly improves its strength and durability by increasing the bulk density of the particle system and reducing porosity, but it is brittle and has many inconveniences in construction and maintenance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Cement 127 parts

[0038] 165 parts fine aggregate

[0039] Coarse aggregate 274 parts

[0040] Steel fiber 13 parts

[0041] Silica fume 21 parts

[0042] 14 parts volcanic ash

[0043] 23 parts of fly ash

[0044] Carbon nanotubes 18 parts

[0045] Inorganic lithium silicate binder 24 parts

[0046] 36 parts of water

[0047] 7 parts of water reducer

[0048] First add coarse aggregate and fiber into the mixer and stir for 1 minute, then add cement, fine aggregate, silica fume, volcanic ash, fly ash, and carbon nanotubes into the mixer in turn, continue stirring for 30 seconds, then mix water and water reducer, add Mixer, after stirring for 30s, add inorganic lithium silicate binder, continue stirring for 1min, and discharge the material to make test samples.

Embodiment 2

[0050] 147 parts of cement

[0051] 155 parts fine aggregate

[0052] Coarse aggregate 254 parts

[0053] Steel fiber 7 parts

[0054] High-strength and high-modulus polyethylene fiber 3 parts

[0055] Silica fume 22 parts

[0056] 12 parts volcanic ash

[0057] Fly ash 20 parts

[0058] Carbon nanotubes 16 parts

[0059] Inorganic lithium silicate binder 26 parts

[0060] 40 parts of water

[0061] 11 parts of water reducer

[0062] First add coarse aggregate and fiber into the mixer and stir for 1 minute, then add cement, fine aggregate, silica fume, volcanic ash, fly ash, and carbon nanotubes into the mixer in turn, continue stirring for 30 seconds, then mix water and water reducer, add Mixer, after stirring for 30s, add inorganic lithium silicate binder, continue stirring for 1min, and discharge the material to make test samples.

Embodiment 3

[0064] 157 parts of cement

[0065] 155 parts fine aggregate

[0066] Coarse aggregate 270 parts

[0067] Steel fiber 7 parts

[0068] High-strength and high-modulus micro-reinforced fiber 4 parts

[0069] Basalt fiber 2 parts

[0070] Silica fume 28 parts

[0071] 15 parts volcanic ash

[0072] Fly ash 19 parts

[0073] Carbon nanotubes 20 parts

[0074] Inorganic lithium silicate binder 25 parts

[0075] 43 parts of water

[0076] 6 parts of water reducer

[0077] First add coarse aggregate and fiber into the mixer and stir for 1 minute, then add cement, fine aggregate, silica fume, volcanic ash, fly ash, and carbon nanotubes into the mixer in sequence, continue stirring for 30 seconds, then mix water and water reducer, add Mixer, after stirring for 30s, add inorganic lithium silicate binder, continue stirring for 1min, and discharge the material to make test samples.

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Abstract

The invention aims at providing a fiber-enhanced cement-based composite material. The material comprises the raw materials of, by weight, 120-160 parts of cement, 150-200 parts of a fine aggregate, 230-330 parts of a coarse aggregate, 26-40 parts of silica fume, 10-20 parts of volcanic ash, 23-35 parts of fly ash, 12-25 parts of carbon nanotube, 10-23 parts of polymer resin, 5-12 parts of a water reducing agent, 35-55 parts of water, and 5-20 parts of fiber. According to the invention, a water-binder ratio is controlled at below 0.23; materials with specific types, specific particle sizes and specific amounts are selected; and several excellent fiber materials and polymer resin are selected, such that the composite material is more compact. On a basis that the strength of the composite material meets application requirements, the material has certain toughness. The fracture energy can reach 20000-40000J / m<2>, and interfacial bond strength is high. The material can be subjected to natural curing or high-temperature steam curing, such that construction processes such as model casting, spraying and scrape coating can be satisfied.

Description

technical field [0001] The invention relates to a fiber-reinforced cement-based composite material, in particular to an ultra-high-performance fiber-reinforced cement-based composite material. Background technique [0002] Cement-based materials are still the most widely used building materials in the world. Concrete structures are also the most widely used structural forms in national infrastructure. They play an important role in urban construction, water conservancy, seaports, transportation, civil and industrial fields. [0003] In order to meet some special requirements of the engineering industry, the research and application of ultra-high performance concrete began. Compared with ordinary concrete, ultra-high performance concrete has many advantages, but the current technology is not yet mature. Ultra-high-performance concrete mainly improves its strength and durability by increasing the bulk density of the particle system and reducing porosity, but it is brittle and...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/06C04B14/14C04B18/08C04B24/28C04B14/48
CPCY02W30/91
Inventor 史瑞瑾
Owner JIUQING PAINT SHANGHAI
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