Fiber reinforced nano-porous concrete

A nano-porous, fiber-reinforced technology, applied in the field of building materials, can solve the problems that it is difficult to obtain products with high strength, the improvement effect is not obvious, and it cannot be used as a load-bearing structure, so as to achieve easy control of the production process, good fire resistance, The effect of high durability

Inactive Publication Date: 2017-02-01
王尧尧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of this method is that generally only low-strength concrete products can be obtained, which cannot be used as load-bearing structures. Although some improved methods can increase the strength of the original concrete to a certain extent, the range is limited, and it is difficult to obtain products with higher strength. It is also difficult to meet the requirements of energy saving
In theory, this method can alleviate the contradiction between strength and thermal conductivity to a certain extent, but in actual practice, the improvement effect is not very obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Dissolve 4.0 kg of aluminum sol with a concentration of 40% in 50.0 kg of water to prepare a diluted aluminum sol, and let it stand for 2 days to obtain a translucent thixotropic alumina colloid. The premix is ​​mixed by ball milling according to the following proportions: 54kg of alumina colloid, 0.1kg of polyester fiber, and 0.1kg of waterproofing agent. Then, 40.0kg of Portland cement was added to the premix and mixed and stirred in a mixer. The obtained viscous paste was injected into the abrasive tool, and steam cured at 90°C for 6h to obtain nano-porous concrete blocks with a density of 1360kg / m3 and a strength of 14MPa. Thermal conductivity 0.17w / m·k.

Embodiment 2

[0039] Dissolve 5.0kg of silica sol with a concentration of 30% in 30.0kg of water to prepare a diluted silica sol, and take 4.0kg of aluminum sol with a concentration of 40% and dissolve it in 45.0kg of water to prepare a diluted aluminum sol. The diluted alumina sol was placed in a container, and the diluted silica sol was slowly added under stirring at 700 r / min to obtain a translucent thixotropic silica-alumina colloid. The premix was formulated and ball-milled as follows: 75.0 kg of silica-alumina colloid, 1.0 kg of glass fiber and 0.1 kg of shrinkage reducer. Then add 30.0kg of aluminate cement to the premix and mix and stir, the obtained slurry is poured into the mold, and after natural curing for 28d, a nano-porous concrete plate is obtained, with a density of 1480kg / m3, a strength of 15MPa, and a thermal conductivity of 0.19w / m·k .

Embodiment 3

[0041] Take 10.0kg of pre-sheared silicone gel and 0.1kg of polyvinyl alcohol, add 40.0kg of water, soak for 24 hours, and then shear and disperse at a speed of 2600r / mim for 3 hours to obtain viscous pre-sheared silicone gel-polyvinyl alcohol thixotropy colloid. The premix is ​​mixed by ball milling in the following proportions: 50.0 kg of viscous pre-sheared silicone gel-polyvinyl alcohol thixotropic colloid, 1.0 kg of carbon fiber, and 0.1 kg of water repellant. Then, 10.0kg of Portland cement was added to the premix, mixed and stirred, and the obtained slurry was poured into the mold. After the film was cured for 28 days, a nanoporous concrete mortar was obtained with a density of 230kg / m3 and a thermal conductivity of 0.054w / m·k.

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Abstract

The invention relates to a fiber reinforced nano-porous concrete. The fiber reinforced nano-porous concrete is produced through the following steps: 1, preparing a premix; 2, mixing the premix with cement; and 3, carrying out compression molding. The fiber reinforced nano-porous concrete has a three-dimensional network micro-pore structure, has a strength reaching 0.2-50 MPa, has no cracking or chalking phenomena, can be used as a wall heat insulation material, and also can be used as a bearing and heat insulating integrated functional wall. The fiber reinforced nano-porous concrete is a pure natural material, has the advantages of good fireproof performance, environmental protection, no pollution and high durability, and has same life with buildings. The internal of the fiber reinforced nano-porous concrete has a nano-porous structure, so the fiber reinforced nano-porous concrete has good sound insulation and sound absorption performances, and also can be used as a sound insulation and sound absorption material; and the fiber reinforced nano-porous concrete has large adsorption ability, and also can be used as a water treatment and air purification material.

Description

technical field [0001] The invention relates to a porous concrete, in particular to a fiber-reinforced nano-porous concrete, which belongs to the field of building materials. Background technique [0002] At present, there are three main ways to prepare porous concrete: 1) Add porous materials during the preparation of concrete. 2) Introduce foaming or air-entraining process in the concrete preparation process. 3) Add porous material and air-entraining or foaming process at the same time during concrete preparation. The above preparation methods still have some problems. 1) Porous materials are added in the traditional concrete preparation process. In theory, the required strength, density and thermal conductivity can be obtained by controlling the type and proportion of porous materials. In practice, porous materials tend to have low density and are easy to break. The density, strength and thermal conductivity may be unevenly distributed, and the product may have qualit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B28/06C04B38/00
CPCC04B28/04C04B28/06C04B38/0045C04B2111/28C04B2111/40C04B2111/52C04B2201/20C04B2201/32C04B2201/50C04B14/303C04B16/0683C04B2103/65C04B14/06C04B14/42C04B24/2623C04B14/386
Inventor 王尧尧
Owner 王尧尧
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