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Modified reinforced geopolymer gelling material and preparation method thereof

A cementing material and enhanced technology, which is applied in the field of modified and enhanced geopolymer cementing material and its preparation, can solve the problems of chemical stability and other problems, and achieve the effect of high mechanical strength and high chemical stability

Active Publication Date: 2018-03-02
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the alkali metal cations (mainly sodium and potassium ions) wrapped in the phosphorus-containing double salt generated by this method still have high chemical activity, there are still problems with the chemical stability of the product in the corrosive environment.

Method used

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  • Modified reinforced geopolymer gelling material and preparation method thereof
  • Modified reinforced geopolymer gelling material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Calcining high-quality kaolin at 750°C, 30 parts of metakaolin with a particle size of 0.1-100 microns, 10 parts of first-grade fly ash with a particle size of 0.1-100 microns, and 105-grade slag with a particle size of 0.1-100 microns 5 parts, 10 parts of water-quenched electric furnace steel slag with a particle size of 0.1-100 microns, 4 parts of silica fume with a particle size of 0.1-100 microns, and 2 parts of silicon dioxide are mixed in proportion and ground to obtain a compound silicon-aluminum powder;

[0023] 2) Take 40 parts of the compound silicon-aluminum powder obtained in step 1), and 2 parts of the condensed phosphoric acid obtained by secondary condensation of aluminum tripolyphosphate at 450°C for 4 hours, and then spray, dry, crush and sieve Aluminum and 5 parts of active calcium aluminate are mixed and ground to obtain compound powder;

[0024] 3) Dissolving 5 parts of sodium hydroxide into 70 parts of liquid sodium silicate with a solid content ...

Embodiment 2

[0027] 1) Calcining high-quality kaolin at 800°C, 25 parts of metakaolin with a particle size of 0.1-100 microns, 15 parts of first-grade fly ash with a particle size of 0.1-100 microns, and 105-grade slag with a particle size of 0.1-100 microns 8 parts, 7 parts of water-quenched electric furnace steel slag with a particle size of 0.1-100 microns, 5 parts of silica fume with a particle size of 0.1-100 microns, and 1.5 parts of silicon dioxide are mixed in proportion and ground to obtain a compound silicon-aluminum powder;

[0028] 2) Take 50 parts of the compound silicon-aluminum powder obtained in step 1), and 4 parts of the condensed phosphoric acid obtained by secondary condensation of aluminum tripolyphosphate at 450°C for 4 hours, and then spray, dry, crush and sieve Aluminum and 10 parts of calcium aluminate cement are mixed and ground to obtain compound powder;

[0029] 3) Dissolving 10 parts of sodium hydroxide into 60 parts of liquid sodium silicate with a solid conte...

Embodiment 3

[0032] 1) Calcining high-quality kaolin at 850°C, 20 parts of metakaolin with a particle size of 0.1-100 microns, 20 parts of first-grade fly ash with a particle size of 0.1-100 microns, and 105-grade slag with a particle size of 0.1-100 microns 10 parts, 5 parts of water-quenched electric furnace steel slag with a particle size of 0.1-100 microns, 6 parts of silica fume with a particle size of 0.1-100 microns and 1 part of silicon dioxide are mixed in proportion and ground to obtain a compound silicon-aluminum powder;

[0033] 2) Take 60 parts of the compound silicon-aluminum powder obtained in step 1), and 6 parts of condensed phosphoric acid obtained by secondary condensation of aluminum tripolyphosphate at 450°C for 4 hours, and then spray, dry, crush and sieve Aluminum, 8 parts of activated calcium aluminate, and 7 parts of calcium aluminate cement are mixed and ground to obtain compound powder;

[0034] 3) Dissolve 7 parts of sodium hydroxide and 8 parts of potassium hyd...

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Abstract

The invention discloses a modified reinforced geopolymer gelling material. The modified reinforced geopolymer gelling material comprises 40-60 parts of compounded silicon-aluminum powder, 70-90 partsof a compounded alkali activator, 5-15 parts of a modifier and 2-6 parts of a condensed phosphate promoter, and the compounded silicon-aluminum powder includes 20-30 parts of metakaolin, 10-20 parts of fly ash, 5-10 parts of mineral slag, 5-10 parts of steel slag, 4-6 parts of silica fume and 1-2 parts of nano-silica. The invention also discloses a preparation method of the modified reinforced geopolymer gelling material. The above product has a high chemical stability and a high mechanical strength in an acid and alkali erosion environment.

Description

technical field [0001] The invention belongs to the technical field of inorganic gelling materials, and in particular relates to a modified enhanced geopolymer gelling material and a preparation method thereof. Background technique [0002] Geopolymer is a new type of inorganic material, which is formed by the dissolution and geopolymerization of active silicon-aluminum materials in an alkaline environment, and the matrix is ​​composed of [SiO 4 ] tetrahedron and [AlO 4 ] The three-dimensional space network structure formed by tetrahedral polymerization, the chemical structure presents an amorphous to semi-crystalline phase, its compressive strength can reach 40-80MPa, and the refractory temperature can reach 900-1100°C. Compared with traditional Portland cement, geopolymer has better thermal stability and corrosion resistance. At the same time, the carbon emissions and energy consumption during the production of geopolymers are 20% and 40% of those of ordinary Portland ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
CPCC04B28/006C04B2201/52C04B14/106C04B18/08C04B18/141C04B18/142C04B18/146C04B14/062C04B12/04C04B22/062C04B22/16C04B22/0093Y02P40/10
Inventor 闫东明陈士堃刘毅金江楚雄
Owner ZHEJIANG UNIV
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