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Building material based on interaction of alkali and CO2

A CO2, synergistic technology, applied in the field of silicate building materials and products, to achieve the effect of fast response, reducing carbonization depth requirements, and relaxing the parameter range

Active Publication Date: 2009-03-11
BEIJING ZHONGYANYI ENG TECH DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned existing practices and related patents show that the amount of waste slag is increased by simply using the alkali excitation effect (such as increasing the amount of cement admixture, preparing alkali-stimulated cementitious materials, etc.), or simply using carbonization to prepare materials (such as using calcium-containing waste slag, etc.) Preparation of carbonized materials), will not play a more active role in the utilization of waste residue resources, energy saving and emission reduction

Method used

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  • Building material based on interaction of alkali and CO2

Examples

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preparation example Construction

[0033] The preparation method of silicate building material product of the present invention, comprises the following steps:

[0034] 1. Grinding: Grinding fly ash and slag to the set fineness;

[0035] 2. Mixing: Mix fly ash and slag evenly according to the ratio requirements;

[0036] 3. Stirring: Add aggregate and appropriate amount of water glass to the evenly mixed powder and stir thoroughly;

[0037] 4. Injection molding: Immediately inject the fully stirred slurry into a test mold of a certain shape to obtain a green body;

[0038] 5. Curing: natural curing of the green body at room temperature;

[0039] 6. Carbonization: Put the green body into the carbonization device to carbonize to obtain the finished product.

[0040] In the above steps, the natural maintenance of the green body at room temperature is to make the mixed water glass exert its stimulating effect, and make the silicon and aluminum minerals in the fly ash and slag react to form a gelling substance th...

Embodiment 1

[0044] Take fly ash and slag and grind them to 550m 2 / Kg, 550m 2 / Kg.

[0045] Get 70Kg pulverized coal ash and 30Kg pulverized slag and mix uniformly to obtain powder A-1; Get 60Kg pulverized coal ash and 40Kg pulverized slag and mix uniformly to obtain powder A-2; Get 50Kg ground pulverized coal ash and Mix 50Kg of finely ground slag uniformly to obtain powder A-3; take 40Kg of finely ground fly ash and mix uniformly with 60Kg of finely ground slag to obtain powder A-4; take 30Kg of finely ground fly ash and 70Kg of Material A-5.

[0046] In powder A-1, A-2, A-3, A-4, A-5 respectively, add sand (aggregate) 40Kg and water glass (alkali activator) 10Kg (accounting for 40% of powder weight respectively and 10%), fully stirred and shaped to obtain standard brick bodies A-1, A-2, A-3, A-4, A-5 (multiple pieces are prepared for each type), and the green bodies are naturally maintained for 1 day and then placed in temperature 60°C, 50% relative humidity, CO 2 Carbonize in a c...

Embodiment 2

[0051] Grind fly ash and slag to 450m 2 / Kg, 450m 2 / Kg. According to the weight ratio of 70%:30%, the ground fly ash and the ground slag are evenly mixed to obtain the powder material for use.

[0052] Take the same amount of powder (about 2 kg each), and then operate as follows: add aggregate and alkali activator to the powder according to the ratio of sand and water glass to 25% and 5% of the weight of the powder respectively , fully stirred and shaped to obtain the standard brick body B-1; according to the ratio of sand and water glass to 25% and 10% of the powder weight respectively, add aggregate and alkali activator to the powder, fully stir and shape to obtain the standard Brick body B-2; according to the ratio of sand and water glass to 25% and 15% of the powder weight respectively, add aggregate and alkali activator to the powder, fully stir and shape to obtain standard brick body B-3; press Sand and sodium silicate account for 25% and 20% of the weight of the pow...

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Abstract

The invention discloses a building material product based on the synergic action between alkali and CO2 and a method for preparing the same, which belongs to the field of silicate building material and product thereof. In the building material product, the fly ash the fineness of which is controlled in the range of between 400 and 600m<2> / Kg and the slag form a mixed powder material, and an aggregate and water glass are added into the mixed powder material for forming so as to obtain a blank, and the blank is subjected to natural curing and carbonization to obtain the building material product. In the invention, the industrial waste slag is used as raw materials, the high-performance silicate product is prepared under the conditions of low alkali and not doping lime and cement clinker, so that the strength level is high, no scumming phenomenon occurs on the surface of the product, the release quantities of various toxic and harmful ions are far below the threshold value; moreover, the building material product has the advantages of good durability, strong freezeproof and weather resistance capabilities, and is suitable to be the building wall material. The invention has active effect on utilizing waste slag resources, saving energy and reducing emission.

Description

technical field [0001] The invention relates to silicate building materials and products, mainly involving waste slag, alkali, CO 2 It is a new type of wall material prepared without lime as the main raw material. Background technique [0002] In our country, the use of fly ash, slag and other industrial wastes as cement admixtures and concrete admixtures has become the main way to recycle waste in the cement concrete industry. According to statistics, my country's cement concrete industry consumed 310 million tons of industrial waste in 2006, accounting for 46% of the total comprehensive utilization of industrial waste in the country. from reducing CO 2 From the perspective of emissions, this is equivalent to reducing the production or use of clinker by 310 million tons, and each ton of clinker emits about 1 ton of CO 2 , the resulting CO 2 The emission reduction is about 310 million tons. It can be seen that the use of industrial waste residues as admixtures and admix...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/12C04B18/08
CPCC04B2111/29C04B2111/20C04B28/26Y02W30/91C04B18/02C04B18/08C04B18/141C04B40/0231
Inventor 叶家元张文生王宏霞王渊张建波
Owner BEIJING ZHONGYANYI ENG TECH DEV CENT
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