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Ecological nanoparticle reinforced cement based composite material and preparation method thereof

A technology of ecological nanoparticles and composite materials, which is applied in the field of cement-based composite materials and their preparation, can solve the problems of less than 20% of the total utilization rate, waste of energy and resources, and low level of regeneration technology, so as to promote composition and structure optimization, The effect of complementary ingredients and high cost performance

Active Publication Date: 2013-09-25
河北蓝科悦拼建筑科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At the same time, we noticed that at present, my country's industrial production solid waste has reached 15.5 billion tons, mine solid waste has reached more than 25 billion tons, and the annual discharge is increasing at a rate of 10 million tons, the level of regeneration technology is low, and the total utilization rate is less than 20%. This not only aggravates the pollution of the environment, but also causes a huge waste of energy and resources

Method used

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preparation example Construction

[0052] The ecological nanoparticle reinforced ultra-high performance cement-based composite material with a strength level of 300MPa proposed by the present invention and its preparation method, the specific steps are as follows:

[0053] 1) Weigh the spherical nanoparticle aggregates and dispersant according to the proportion of the formula, mix them dry for 1-2 minutes, then pour them into a 200W power ultrasonic oscillator filled with water, ultrasonically oscillate and mix for 20 minutes, then place the slurry in a vacuum In a drying oven, vacuum dry at a temperature range of 40°C to 60°C for 12 hours to prepare dispersed ecological nanoparticles;

[0054] 2) Dry mix the cement, ecological nanoparticles, and high-strength fine aggregates weighed according to the formula ratio in a mortar mixing container for 3 minutes to obtain dry materials, and the ecological nanoparticles are the dispersed ecological nanoparticles prepared in step 1);

[0055] 3) Weigh high-performance ...

Embodiment 1

[0063] Cement 23.5%

[0064] Eco Nanoparticles 18.5%

[0065] High performance water reducer 1.2%

[0066] Defoamer 0.01%

[0067] High-strength fine aggregate 42.8%

[0068] High-strength superfine steel fiber 9.4%

[0069] The balance is water.

[0070] Among them, the cement is P.II 52.5 Portland cement, the ecological nanoparticles are siliceous spherical nanoparticles extracted from Class I ultrafine fly ash, and the high-strength fine aggregate is basalt machine-made sand with fineness modulus M=3 , The high-efficiency water-reducing agent is a polycarboxylate water-reducing agent with a water-reducing rate of more than 50%, and the defoamer is a high-efficiency silicone defoaming powder, which adopts standard maintenance. The dispersant used for dispersing the ecological nanoparticles is a sterically hindered stable dispersant, and the percentage by weight is 0.6%. The mechanical properties of the ecological nanoparticle-reinforced cement-based composite material ...

Embodiment 2

[0073] Cement 26.4%

[0074] Eco Nanoparticles 15.6%

[0075] High performance water reducer 1.3%

[0076] Defoamer 0.012%

[0077] High strength fine aggregate 39.1%

[0078] High-strength superfine steel fiber 12.6%

[0079] The balance is water.

[0080] Among them, the cement is P.II 52.5 Portland cement, the ecological nanoparticles are silica-alumina spherical nanoparticles extracted from Class I ultrafine fly ash, and the high-strength fine aggregate is basalt mechanism with fineness modulus M=2.7 Sand, high-efficiency water reducer is polycarboxylate water reducer with a water reducing rate of more than 50%, and the defoamer is high-efficiency silicone defoaming powder, which is cured by steam at 85°C. The dispersant used for dispersing the ecological nanoparticles is an electrostatic repulsion stable dispersant, and the percentage by weight is 1.0%. The mechanical properties of the ecological nanoparticle-reinforced cement-based composite material prepared by th...

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Abstract

The invention discloses an ecological nanoparticle reinforced cement based composite material and a preparation method thereof. High-strength and high-elastic spherical nanoparticles in industrial waste residues are adopted for largely replacing cement, and a high-performance admixture with a water-reducing rate of over 50% and high-strength superfine coppered steel fibers are used, and through the effective and efficient application of cement, the ecological nanoparticles, the chemical admixtures, the steel fibers and multi-element composite techniques thereof, the composition and structure optimization of concrete materials is greatly promoted, and an effect that the advantages of the components are superposed, and components are complementary is achieved. According to the invention, the problem that under standard curing and steam curing conditions, the compressive strength of an existing cement-based composite material can not reach over 300 Mpa and the bending strength can not reach over 60 Mpa is solved, the highly efficient regeneration and utilization rate and core technological value of the industrial waste residues are greatly enhanced, and the application amount of cement clinkers in the cement-based composite material is reduced, and therefore, the composite material is suitable for being used as a large civil engineering structure material with a designed concrete compressive strength of 300 Mpa.

Description

technical field [0001] The invention belongs to the field of building materials and foundation engineering construction, and relates to a cement-based composite material and a preparation method thereof. Background technique [0002] Ultra-high performance cement-based composite material is a new material developed in the 1980s, which has ultra-high strength, durability and workability, and first appeared in France. Compared with ordinary cement-based composite materials and high-performance cement-based composite materials, it has excellent mechanical properties and durability, and due to the addition of a large number of fibers in its system, there are multi-slit cracks and fractures during the stress cracking process. In the process of strain strengthening, the toughness is significantly improved, and it has strong crack resistance. In the past ten years, due to its excellent performance equal to or exceeding that of metals and organic polymer materials, ultra-high perfo...

Claims

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Application Information

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IPC IPC(8): C04B28/04
Inventor 郭丽萍孙伟黄伟樊俊江
Owner 河北蓝科悦拼建筑科技有限公司
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