Geopolymer grouting material based on incineration fly ash and preparation method thereof

A technology for incinerating fly ash and grouting materials, which is used in cement production and other directions to achieve the effect of convenient transportation and excellent performance

Active Publication Date: 2021-04-06
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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  • Geopolymer grouting material based on incineration fly ash and preparation method thereof

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 of the geopolymer grouting material, and the geopolymer grouting material comprises the following components: incineration fly ash, fly ash, metakaolin, silica fume, calcined gypsum, a solid powdery alkaline activator, bauxite, soda lime, a water reducing agent, hydroxypropyl methyl cellulose ether, a defoaming agent, a polyether air entraining agent, a plastic expanding agent, a solid powdery adsorbent, and water. According to the incineration fly ash-based geopolymer grouting material and the preparation method thereof provided by the invention, heavy metal ions of incineration fly ash are solidified by utilizing the characteristics of a three-dimensional network cage-shaped structure of the geopolymer material, so the recycling problem of straw and municipal waste incineration fly ash is solved, and the landfill problem of traditional solidified heavy metal ions is solved. The polymer grouting material provided by the invention not only can well solidify heavy metal ions in the incineration fly ash, but also is convenient to construct and transport, and the prepared polymer grouting material is excellent in performance in various 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 Applications(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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