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A geopolymer grouting material based on incineration fly ash and its preparation method

A technology for incinerating fly ash and grouting materials, applied in cement production, etc., to achieve the effect of convenient transportation and excellent performance

Active Publication Date: 2022-04-05
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a geopolymer grouting material based on incineration fly ash and its preparation method, which can solve the problem of incineration fly ash and the transportation of liquid alkali activator in the geopolymer grouting material. Storage and other issues

Method used

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  • A geopolymer grouting material based on incineration fly ash and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Straw - 30 parts of urban waste incineration fly ash, 16 parts of fly ash, 10 parts of metakaolin, 8 parts of silica fume, 5 parts of calcined gypsum, 5 parts of bauxite, 15 parts of soda lime, and 2 parts of calcium aluminate , 2 parts of sodium aluminate, 2 parts of sodium phosphate, 0.8 parts of polycarboxylate superplasticizer, 0.1 part of hydroxypropyl methylcellulose ether, 0.1 part of polyether defoamer, 0.1 part of polyether air-entraining agent, plastic expansion 0.1 part of agent, 2 parts of polyaluminum chloride, 1.8 parts of ethylenediaminetetraacetic acid (EDTA), and the ratio of water to material is 0.35.

[0044] (2) Accurately weigh 2500g of the dry mixture according to the mixing ratio of (1), pour the dry mixture into the cement slurry high-speed mixer, and stir the dry mixture for more than 2 minutes at a speed of 500r / min until it is uniform; Weigh water at a water-to-material ratio of 0.35, first add 80% to the high-speed mixer, and stir for 1 m...

Embodiment 2

[0046] (1) Straw - 40 parts of urban waste incineration fly ash, 6 parts of fly ash, 10 parts of metakaolin, 8 parts of silica fume, 5 parts of calcined gypsum, 5 parts of bauxite, 15 parts of soda lime, 2 parts of calcium aluminate , 2 parts of sodium aluminate, 2 parts of sodium phosphate, 0.8 parts of polycarboxylate superplasticizer, 0.1 part of hydroxypropyl methylcellulose ether, 0.1 part of polyether defoamer, 0.1 part of polyether air-entraining agent, plastic expansion 0.1 part of agent, 2 parts of polyaluminum chloride, 1.8 parts of ethylenediaminetetraacetic acid (EDTA), and the ratio of water to material is 0.35.

[0047] (2) Accurately weigh 2500g of the dry mixture according to the mixing ratio of (1), pour the dry mixture into the cement slurry high-speed mixer, and stir the dry mixture for more than 2 minutes at a speed of 500r / min until it is uniform; Weigh water at a water-to-material ratio of 0.35, first add 80% to the high-speed mixer, and stir for 1 minute...

Embodiment 3

[0049] (1) Straw - 50 parts of urban waste incineration fly ash, 10 parts of metakaolin, 4 parts of silica fume, 5 parts of calcined gypsum, 5 parts of bauxite, 15 parts of soda lime, 2 parts of calcium aluminate, and 2 parts of sodium aluminate , 2 parts of sodium phosphate, 0.8 parts of polycarboxylate superplasticizer, 0.1 part of hydroxypropyl methylcellulose ether, 0.1 part of polyether defoamer, 0.1 part of polyether air-entraining agent, 0.1 part of plastic expansion agent, polymerized chlorine 2 parts of aluminum chloride, 1.8 parts of ethylenediaminetetraacetic acid (EDTA), and the ratio of water to material is 0.35.

[0050] (2) Accurately weigh 2500g of the dry mixture according to the mixing ratio of (1), pour the dry mixture into the cement slurry high-speed mixer, and stir the dry mixture for more than 2 minutes at a speed of 500r / min until it is uniform; Weigh water at a water-to-material ratio of 0.35, first add 80% to the high-speed mixer, and stir for 1 minut...

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Abstract

The invention discloses a geopolymer grouting material based on incineration fly ash and a preparation method thereof. The geopolymer grouting material comprises the following components: incineration fly ash, fly ash, metakaolin, silica fume, burnt Gypsum, solid powder alkaline activator, bauxite, soda lime, water reducer, hydroxypropyl methylcellulose ether, defoamer, polyether air-entraining agent, plastic expansion agent, solid powder adsorbent and water. The geopolymer grouting material based on incineration fly ash and its preparation method provided by the present invention utilize the characteristics of the three-dimensional network cage structure of the geopolymer material to solidify the heavy metal ions in the incineration fly ash, and solve the problem of straw and municipal waste incineration fly ash. The recycling and reuse of ash, and the landfill problem of traditional solidified heavy metal ions. The polymer grouting material provided by the invention can not only well solidify the heavy metal ions in the incineration fly ash, but also is convenient for construction and transportation, and the prepared polymer grouting material has excellent performances in all aspects.

Description

technical field [0001] The invention relates to a geopolymer and a preparation method thereof, in particular to a geopolymer grouting material based on incineration fly ash and a preparation method thereof. Background technique [0002] Power generation by burning straw and municipal waste will inevitably produce a large amount of incineration fly ash; the main chemical components of incineration fly ash are CaO, SiO 2 、Al 2 o 3 , Fe 2 o 3 In addition, incineration fly ash often contains high concentrations of heavy metals, such as Hg, Pb, Cd, Cu, Cr and Zn, etc. These heavy metals mainly exist in the form of small aerosol particles and enriched on the surface of fly ash particles; Fly ash also contains a small amount of dioxins and furans, so incineration of fly ash has a strong potential hazard. [0003] The ways to deal with heavy metal ions in incineration fly ash include: cement solidification method, asphalt solidification method, melting solidification technology...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B111/70
CPCC04B28/006C04B2111/70C04B2201/50C04B14/303C04B22/064C04B22/08C04B22/16C04B22/12C04B24/123C04B24/32C04B24/383C04B2103/0068Y02P40/10
Inventor 季晓丽钟世云郝庆凯李熙
Owner TONGJI UNIV
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