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Geopolymer-like cement and preparation method thereof

A geopolymer and cement technology, which is applied to the field of geopolymer-like cement and its preparation, can solve the problems of difficulty in the promotion and application of geopolymers in a large area, no uniform standard for addition amount, and complicated process, so as to widen the source of raw materials and the reaction The effect of strong resistance and simple process

Active Publication Date: 2012-12-19
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the step of "preparing alkali activator solution" is included in the traditional preparation process of geopolymers. Due to the viscous and strongly alkaline alkali activator solution, it is easy to cause chemical corrosion to the container and the human body, and the temporary preparation The alkali activator solution process is cumbersome, and there is no uniform standard for the addition of water and solid alkali activator for different silicon-aluminum raw materials, so this virtually brings great difficulties to the large-scale application of geopolymers

Method used

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  • Geopolymer-like cement and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0024] A type of geopolymer cement and a preparation method thereof. The components and content of geopolymer cement are:

[0025] Vanadium extraction tailings from stone coal 62-68wt%;

[0026] Solid sodium hydroxide 5-7wt%;

[0027] Solid sodium aluminate 9~11wt%;

[0028] 8-12wt% ultrafine active silica fume;

[0029] Metakaolin 6-9wt%;

[0030] According to the above-mentioned components and their contents, the preparation steps of this type of geopolymer cement are:

[0031] In the first step, solid sodium hydroxide is added to the tailings of vanadium extraction from stone coal, mechanically stirred for 5 to 10 minutes, and then placed in a ball mill for dry ball milling for 10 to 15 minutes to obtain a ball mill;

[0032] The second step is to put the ball abrasive into the muffle furnace for calcination at a temperature of 300-400°C; keep the temperature for 3-4 hours to obtain the calcined material;

[0033] The third step is to cool the calcined material at roo...

Embodiment 2

[0038] A type of geopolymer cement and a preparation method thereof. The components and content of geopolymer cement are:

[0039] Vanadium extraction tailings from stone coal 68~73wt%;

[0040] Solid potassium hydroxide 5-7wt%;

[0041] Solid sodium aluminate 7-9wt%;

[0042] 8-12wt% ultrafine active silica fume;

[0043] Metakaolin 6-9wt%;

[0044] According to the above-mentioned components and their contents, the preparation steps of this type of geopolymer cement are:

[0045] In the first step, solid potassium hydroxide is added to the tailings of vanadium extraction from stone coal, mechanically stirred for 5-10 minutes, and then placed in a ball mill for dry ball milling for 10-15 minutes to obtain a ball mill;

[0046] The second step is to put the ball abrasive into the muffle furnace for calcination at a temperature of 400-500°C; keep the temperature for 3-4 hours to obtain the calcined material;

[0047]The third step is to cool the calcined material at room ...

Embodiment 3

[0052] A type of geopolymer cement and a preparation method thereof. The components and content of geopolymer cement are:

[0053] Vanadium extraction tailings from stone coal 62-68wt%;

[0054] The mixture of solid sodium hydroxide and solid potassium hydroxide 5-7wt%;

[0055] Solid sodium aluminate 7-9wt%;

[0056] Ultrafine active micro-silica powder 12-16wt%;

[0057] Metakaolin 6-9wt%;

[0058] According to the above-mentioned components and their contents, the preparation steps of this type of geopolymer cement are:

[0059] The first step, adding a mixture of solid sodium hydroxide and solid potassium hydroxide to the tailings of vanadium extraction from stone coal, mechanically stirring for 5 to 10 minutes, and then placing it in a ball mill for dry ball milling for 10 to 15 minutes to obtain a ball mill;

[0060] The second step is to put the ball abrasive into the muffle furnace for calcination at a temperature of 500-600°C; keep the temperature for 2-3 hours t...

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Abstract

The invention relates to geopolymer-like cement and a preparation method thereof. The geopolymer-like cement is prepared from the following components by weight percent: 62-73wt% of stone coal vanadium tailings, 5-10wt% of solid alkali metal hydroxide, 7-11wt% of solid sodium aluminate, 8-16wt% of superfine activated microsilica and 6-13wt% of metakaolin. The preparation method comprises the following steps: adding the solid alkali metal hydroxide in the stone coal vanadium tailings, stirring, performing dry ball milling and calcining; adding the solid sodium aluminate, the superfine activated microsilica and the metakaolin in the calcined mixture, stirring, and performing dry ball milling, so as to prepare the finished geopolymer-like cement; and when in use, adding water in the finishedcement, stirring and simultaneously grouting so that hardened slurry is formed at room temperature. According to the invention, the operation is simple, the cost is low, and the chemical corrosion degree on containers and human bodies is low; the hardened slurry of the prepared geopolymer-like cement has the advantages of high compression strength and folding strength, strong resistance to sulfate etching, water etching and alkali-aggregate reaction and good air shrinkage.

Description

technical field [0001] The invention belongs to the technical field of geopolymers, and in particular relates to a kind of geopolymer cement and a preparation method thereof. Background technique [0002] With the continuous development of human resources and the continuous strengthening of environmental awareness, the general development trend of future materials is to gradually replace metal materials with non-metallic materials, and among non-metallic materials, inorganic materials will become more and more popular in many fields. Many places replace organic materials. The preparation of non-toxic, high-temperature-resistant, high-strength inorganic materials from extremely abundant and cheap inorganic minerals is one of the important directions of material science research in the world today. Geopolymers are a new class of high-performance inorganic polymer materials, and they are the most promising class of alkali-activated gelling materials. Geopolymers have unique p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/24C04B7/36
CPCC04B28/006C04B20/04Y02P40/10Y02W30/91C04B12/005C04B14/062C04B14/106C04B18/14C04B22/0093C04B22/062C04B40/0028C04B20/026
Inventor 张一敏焦向科陈铁军刘涛
Owner WUHAN UNIV OF TECH
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