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Nano porous concrete taking thixotropic colloid as template agent and preparation method

A nanoporous and thixotropic technology, applied in ceramic products, applications, household appliances, etc., can solve the problems of low concrete products, cannot be used as load-bearing structures, and are difficult to obtain, and achieve high compatibility effects

Inactive Publication Date: 2016-02-03
浙江圣润纳米科技有限公司
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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 a strength above 10MPa. At the same time It is also difficult to meet the requirement of 65% 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

[0070] Take 4.0kg of aluminum sol with a concentration of 40% and dissolve it in 50.0kg of water to prepare diluted aluminum sol, and let it stand for 2 days to obtain translucent thixotropic alumina colloid. The premixed dry material is mixed and stirred according to the following ratio: Portland cement 40.0kg, shale ceramsite 16.0kg, vitrified microspheres 8.0kg, silica fume 1.0kg. The premixed wet material is mixed and stirred according to the following ratio: 54kg of alumina colloid, 0.1kg of polyester fiber, and 0.1kg of waterproofing agent. Mix and stir the premixed dry material and the premixed wet material, inject the viscous paste into the abrasive tool, and steam cure at 90°C for 6 hours to obtain nanoporous concrete blocks with a density of 1360kg / m 3 , strength 14MPa, thermal conductivity 0.17w / m·k.

Embodiment 2

[0072]Dissolve 5.0kg of 30% silica sol in 30.0kg of water to prepare diluted silica sol, and dissolve 4.0kg of 40% aluminum sol in 45.0kg of water to prepare diluted alumina sol. The diluted aluminum sol is placed in a container, and the diluted silica sol is slowly added under stirring at 700 r / min to obtain a translucent thixotropic silica-alumina colloid. The premixed dry material is prepared and mixed as follows: 30.0kg of aluminate cement, 15.0kg of clay ceramsite, 8.0kg of expanded perlite, 20.0kg of fine sand, and 1.0kg of pozzolan. The premixed wet material is mixed and stirred according to the following ratio: 75.0kg of silica-alumina colloid, 1.0kg of sepiolite fiber, 0.2kg of polyester fiber and 0.1kg of shrinkage reducer. Mix the premixed dry material with the premixed wet material, pour the resulting slurry into the mold, and after 28 days of natural curing, get a nanoporous concrete plate with a density of 1480kg / m 3 , strength 15MPa, thermal conductivity 0.19w / ...

Embodiment 3

[0074] Take 11.0 kg of magnesium aluminum silicate and add 50.0 kg of water, soak for 24 hours, and then shear and disperse at a speed of 1700 r / min for 4 hours to obtain viscous thixotropic magnesium aluminum silicate colloid. The premixed dry material is mixed according to the following ratio: 30.0kg of sulphoaluminate cement, 12.0kg of fly ash ceramsite, 8.0kg of rice husk ash, and 1.0kg of silica fume. The premixed wet material is mixed and stirred according to the following ratio: magnesium aluminum silicate thixotropic colloid 60.0kg, wood fiber 1.0kg, shrinkage reducing agent 0.1kg. Mix and stir the premixed dry material and the premixed wet material, pour the resulting slurry into the mold, and after 7 days of natural curing, get nano-porous concrete bricks with a density of 1150kg / m 3 , strength 10MPa, thermal conductivity 0.15w / m·k.

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PUM

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Abstract

The invention relates to porous concrete and a preparation method thereof, in particular to novel nano porous concrete which is prepared by taking thixotropic colloid as a template agent to form a uniform-water-phase three-dimensional network nano porous structure and adding cementing materials, fine aggregate, coarse aggregate, an admixture and an additive. The nano porous concrete has the characteristics of being light, high in strength and low in heat conductivity, can be prefabricated into bricks, building blocks, plates, and assembly type stairs, wallboards, balcony slabs and roof panel parts in a factory, can be also cast on a construction site, and further can be prepared into mortar, thereby having remarkable practical significance on promotion of development of housing industrialization and green building concrete material in our country.

Description

technical field [0001] The invention relates to a porous concrete and a preparation method thereof, in particular to using thixotropic colloid as a template agent to form a three-dimensional network nanoporous structure with uniform water phase, and adding cementitious materials, fine aggregate, coarse aggregate, and admixture and admixtures to prepare a new type of concrete with nanoporosity. The nanoporous concrete of the present invention has the characteristics of light weight, high strength and low thermal conductivity, and can be prefabricated into bricks, blocks and plates or assembled stairs, wall panels, floor slabs, balcony panels, and roof panel components in factories, and can also be used in Cast-in-place at the construction site can also be made into mortar, which has significant practical significance in promoting the industrialization of housing in my country and the development of green building concrete materials. Background technique [0002] In order to e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B28/04C04B28/06C04B14/30C04B14/04C04B14/10C04B16/02C04B16/04
Inventor 金承黎
Owner 浙江圣润纳米科技有限公司
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