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A load-bearing thermal insulation concrete with ettringite colloid as template agent and preparation method thereof

A technology of ettringite colloid and thermal insulation concrete, which is applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc., can solve problems such as poor thermal insulation effect, achieve high compatibility, good colloidal properties, and avoid shrinkage Effect

Active Publication Date: 2017-06-27
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

This method is generally used to make load-bearing blocks, and the thermal insulation effect is still not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Dissolve 6.0kg of aluminum sulfate in 20.0kg of water to prepare an aluminum sulfate solution, and dissolve 2.2kg of quicklime in 20.0kg of water to prepare lime water. Put the lime water in the container, slowly add the aluminum sulfate solution under the condition of stirring at 200r / min until the pH value is 7.0, and obtain the translucent ettringite colloid. The premixed dry material is prepared and mixed as follows: Portland cement 35.0kg, fine sand 38.0kg, vitrified microspheres 8.0kg, clay ceramsite 15.0kg, zeolite powder 1.0kg. Add 0.5 kg of polypropylene fiber and 0.1 kg of shrinkage reducer to the prepared ettringite colloid, and stir for 3 minutes to obtain a premixed wet material. Then add the premixed dry ingredients and continue to stir for 5 minutes. The resulting concrete slurry is poured into molds to make bricks. After 28 days of natural curing, the dry density of the obtained sample is 1070kg / m 3 , strength 18MPa, thermal conductivity 0.18w / m·k.

Embodiment 2

[0078] Dissolve 6.5kg of aluminum sulfate in 20.0kg of water to prepare an aluminum sulfate solution, and dissolve 2.3kg of quicklime in 20.0kg of water to prepare lime water. Put the lime water in the container, slowly add the aluminum sulfate solution under the condition of stirring at 500r / min until the pH value is 7.2, and obtain the translucent ettringite colloid. The premixed dry material is prepared and mixed as follows: Portland cement 40.0kg, fine sand 50.0kg, vitrified microbeads 8.0kg, pebbles 40.0kg, shale ceramsite 20.0kg, silicon micropowder 1.2kg. Add 1.0 kg of glass fiber and 0.1 kg of waterproofing agent to the prepared ettringite colloid, and stir for 5 minutes to obtain a premixed wet material. Then add the premixed dry ingredients and continue to stir for 8 minutes. The resulting concrete slurry is poured into molds to form panels. After soaking in water for 28 days, the dry density of the obtained sample is 1310kg / m 3 , strength 25MPa, thermal conductiv...

Embodiment 3

[0080] Dissolve 4.0kg of aluminum sulfate in 20.0kg of water to prepare an aluminum sulfate solution, and dissolve 1.4kg of quicklime in 20.0kg of water to prepare lime water. Put the aluminum sulfate solution in the container, and slowly add lime water while stirring at 1150r / min, until the pH value is 7.5, and the translucent ettringite colloid is obtained. The premixed dry material is prepared and mixed as follows: 12.0kg of sulphoaluminate cement, 20.0kg of fine sand, 15.0kg of expanded pearl, 15.0kg of shale ceramsite, and 0.8kg of silica fume. Add 1.0 kg of brucite fiber and 0.1 kg of retarder to the prepared ettringite colloid, and stir for 6 minutes to obtain a premixed wet material. Then add the premixed dry ingredients and continue to stir for 4 minutes. The resulting concrete slurry is poured into molds to make special-shaped components. After 14 days of natural curing, the dry density of the obtained sample is 950kg / m 3 , strength 15MPa, thermal conductivity 0.1...

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Abstract

The invention relates to load-bearing and heat-insulation concrete and a preparation method for the load-bearing and heat-insulation concrete and particularly relates to novel concrete, which has a uniform micropore structure and simultaneously has load-bearing capacity and a heat insulation function, prepared through forming an aqueous-phase uniform three-dimensional-network micropore structure by taking ettringite colloid as a template agent and adding a cementing glue material, fine aggregates, coarse aggregates, additives and admixtures. The load-bearing and heat-insulation concrete disclosed by the invention has the characteristics of light weight, high strength and low coefficient of thermal conductivity, can be used for preforming bricks, building blocks and sheet materials or components such as assembly-type stairs, wallboards, floor slabs, balcony slabs and roof panels in plant, can also be subjected to cast-in-place at a construction field site and is compatible with an aerated concrete production process, a foamed concrete production process and an ordinary concrete preforming production process at present, so that the transformation and upgrading of the traditional concrete industries are facilitated, and the load-bearing and heat-insulation concrete has remarkable practical significance in promoting the industrialization of Chinese residence and the development of environment-friendly building concrete materials.

Description

technical field [0001] The invention relates to a load-bearing and heat-preserving concrete and a preparation method thereof, in particular to using ettringite colloid as a template agent to form a three-dimensional network microporous structure with uniform water phase. Aggregates and admixtures are used to prepare a new type of concrete with load-bearing capacity and thermal insulation function. The load-bearing and thermal insulation concrete of the present invention has the characteristics of light weight, high strength and low thermal conductivity, and can be prefabricated in the factory into bricks, blocks and plates or components such as assembled stairs, wall panels, floor slabs, balcony panels, and roof panels. Casting at the construction site has significant practical significance for promoting the industrialization of housing in my country and the development of green building concrete materials. Background technique [0002] With the rapid development of housing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B22/08C04B14/02C04B18/08C04B14/06
CPCY02W30/91
Inventor 金承黎
Owner 浙江圣润纳米科技有限公司
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