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Alkali-activated fluidized bed fly ash geopolymer and preparation method thereof

A geopolymer and fluidized bed technology, applied in cement production, etc., can solve the problems of low activity of fly ash in fluidized bed, difficulty in effective utilization, etc.

Pending Publication Date: 2021-08-31
中能化江苏地质矿产设计研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned defects in the prior art that the fly ash of the fluidized bed is difficult to be effectively utilized due to reasons such as low activity, the present invention proposes an alkali-activated fluidized bed fly ash geopolymer and its preparation method

Method used

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  • Alkali-activated fluidized bed fly ash geopolymer and preparation method thereof
  • Alkali-activated fluidized bed fly ash geopolymer and preparation method thereof
  • Alkali-activated fluidized bed fly ash geopolymer and preparation method thereof

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Embodiment 1

[0054] In this embodiment, the preparation steps of the alkali-activated fluidized bed fly ash geopolymer are as follows:

[0055] S1. In parts by mass, weigh 250 parts of fluidized bed fly ash, 50 parts of cement, 15 parts of inorganic base activator, 15 parts of organic base activator, and 126 parts of water. The inorganic alkali activator adopts sodium silicate Na with a modulus of 1.8. 2 O nSiO 2 , The organic base activator uses sodium acetate NaAc.

[0056] S2. Dried and pulverized the fluidized bed fly ash to 200-250 mesh; then uniformly stirred the pulverized fluidized bed fly ash and cement to obtain a mixture A.

[0057] S3. Divide the water into three parts, take one part of water to dissolve the inorganic base activator to form solution B; take the other part of water to dissolve the organic base activator to form solution C.

[0058] S4. Mix solution B and solution C to obtain solution D, add solution D to mixture A, stir in a slurry mixer at 1000-1200r / min, ad...

Embodiment 2

[0064] The preparation steps of the alkali-activated fluidized-bed fly ash geopolymer in this example are the same as those in Example 1. Compared with Example 1, only the components of the alkali-activated fluidized-bed fly ash geopolymer in this example are changed.

[0065] The components of the alkali-activated fluidized-bed fly ash geopolymer in this embodiment are counted in parts by mass, including: 250 parts of fluidized-bed fly ash, 50 parts of cement, 18 parts of inorganic alkali activator, organic alkali-activated 12 parts of medicine, 132 parts of water. Among them, sodium water glass with a modulus of 1.8 is used as the inorganic base activator, and NaAc is used as the organic base activator.

Embodiment 3

[0067] The preparation steps of the alkali-activated fluidized-bed fly ash geopolymer in this example are the same as those in Example 1. Compared with Example 1, only the components of the alkali-activated fluidized-bed fly ash geopolymer in this example are changed.

[0068] The components of the alkali-activated fluidized-bed fly ash geopolymer in this embodiment are counted in parts by mass, including: 250 parts of fluidized-bed fly ash, 50 parts of cement, 12 parts of inorganic alkali activator, organic alkali excited 18 parts of medicine, 132 parts of water. Among them, sodium water glass with a modulus of 1.8 is used as the inorganic base activator, and NaAc is used as the organic base activator.

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Abstract

An alkali-activated fluidized bed fly ash geopolymer comprises, by mass, 250-270 parts of fluidized bed fly ash, 30-50 parts of cement, 5-18 parts of an inorganic alkali activator, 5-18 parts of an organic alkali activator and 120-140 parts of water. The fluidized bed fly ash is subjected to composite alkali excitation through the organic alkali activator and the inorganic alkali activator, so that the problem of high utilization difficulty of the fluidized bed fly ash due to complex components and low activity of the fluidized bed fly ash is effectively solved, high-dosage utilization of the fluidized bed fly ash is realized, and the mechanical properties of the prepared fluidized bed fly ash geopolymer are ensured.

Description

technical field [0001] The invention relates to the technical field of gelling materials, in particular to an alkali-activated fluidized bed fly ash geopolymer and a preparation method thereof. Background technique [0002] It is well known that limestone is heavily harvested as a raw material for making cement all over the world, which leads to an ecological imbalance. Since concrete is the most widely used construction material, the pressure on sand and aggregate, which are natural resources, has also increased. Cement manufacturers convert limestone into calcium oxide by heating. Fuels used to heat cement kilns can be coal, natural gas, sawdust, and methane gas. Both chemical conversion and firing release carbon dioxide, which is also a major greenhouse gas. . Therefore, it is very important to find alternatives to these resources. [0003] In 1978, French professor Joseph Davidovits reacted with lye and kaolin to prepare a new type of aluminosilicate material with a t...

Claims

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Application Information

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IPC IPC(8): C04B12/00C04B28/00
CPCC04B12/005C04B28/00C04B2201/50C04B18/06C04B12/04C04B24/04Y02P40/10
Inventor 王彦君王庆平卢春阳吴求刚赵恒朱龙涛
Owner 中能化江苏地质矿产设计研究院有限公司
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