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Fly ash based geopolymer and preparation method thereof

A fly ash and polymer technology, applied in the field of building materials, can solve problems such as difficulty in controlling the proportioning strength, and achieve the effects of low cost, appropriate cost, and energy saving

Inactive Publication Date: 2013-12-18
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the technical shortcomings of existing geological polymers such as difficulty in controlling the proportioning strength and the use of water as the activator, and provide a pulverized coal with low cost, simple process, non-toxic and pollution-free, wide source of raw materials, and controllable strength. Ash-based geopolymer; the present invention also provides the preparation method of the above-mentioned fly ash-based geopolymer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Raw material ratio:

[0024] Dry powder phase components and parts (by weight) proportioning are as follows:

[0025] 85 parts of fly ash;

[0026] Silica fume 0 parts;

[0027] 10 parts of solid sodium silicate;

[0028] 5 parts of industrial pure sodium hydroxide;

[0029] Sodium tripolyphosphate 0.12 parts.

[0030] Concrete preparation process is as follows:

[0031] (1) Dry powder phase: 85 parts of fly ash, 0 part of silica fume, 10 parts of solid sodium silicate, 5 parts of industrial pure sodium hydroxide, 0.12 parts of sodium tripolyphosphate, mix, stir for 5 minutes to make it uniform, and obtain a dry powder phase ;

[0032] (2) Mix the dry powder phase with water at a weight ratio of 20:3, and stir for 10 minutes to obtain a slurry;

[0033] (3) Inject the slurry into a 70.7mm×70.7mm×70.7mm steel mold, place it indoors at room temperature for 1 day, and then demould it, and then continue to maintain it until the age of 28 days;

[0034] (4) The obtai...

Embodiment 2

[0037] Raw material ratio:

[0038] Dry powder phase components and parts (by weight) proportioning are as follows:

[0039] 77 parts of fly ash;

[0040] 9 parts of silica fume;

[0041] 10 parts of solid sodium silicate;

[0042] 5 parts of industrial pure sodium hydroxide;

[0043] Sodium tripolyphosphate 0.10 parts

[0044] Concrete preparation process is as follows:

[0045] (1) Dry powder phase: 77 parts of fly ash, 9 parts of silica fume, 10 parts of solid sodium silicate, 5 parts of industrial pure sodium hydroxide, 0.10 part of sodium tripolyphosphate, mixed and stirred for 5 minutes to make it uniform, to obtain the dry powder phase;

[0046] (2) Mix the dry powder phase with water at a weight ratio of 20:3, and stir for 10 minutes to obtain a slurry;

[0047] (3) Inject the slurry into a 70.7mm×70.7mm×70.7mm steel mold, place it indoors at room temperature for 1 day, and then demould it, and then continue to maintain it until the age of 28 days;

[0048] (4) ...

Embodiment 3

[0051] Raw material ratio:

[0052] Dry powder phase components and parts (by weight) proportioning are as follows:

[0053] 68 parts of fly ash;

[0054] 17 parts of silica fume;

[0055] 10 parts of solid sodium silicate;

[0056] 5 parts of industrial pure sodium hydroxide;

[0057] Concrete preparation process is as follows:

[0058] (1) Dry powder phase: 68 parts of fly ash, 17 parts of silica fume, 10 parts of solid sodium silicate, and 5 parts of industrial pure sodium hydroxide are mixed, stirred for 5 minutes to make it uniform, and the dry powder phase is obtained;

[0059] (2) Mix the dry powder phase with water at a weight ratio of 20:3, and stir for 10 minutes to obtain a slurry;

[0060] (3) Inject the slurry into a 70.7mm×70.7mm×70.7mm steel mold, place it indoors at room temperature for curing for 1 day, and then remove the mold, and then cure it to the age of 28 days;

[0061] (4) The obtained fly ash-based geopolymer is tested for mechanical properties,...

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Abstract

The invention provides a fly ash based geopolymer. The fly ash based geopolymer comprises a dry powder phase and water, of which the mass ratio is 20:3, wherein the dry powder phase comprises the following components in parts by weight: 60-85 parts of fly ash, 0-25 parts of silica fume, 10 parts of solid sodium silicate, 5 parts of industrially pure sodium hydroxide and 0.05-0.12 part of sodium tripolyphosphate. The fly ash based geopolymer can replace cement to prepare engineering materials such as concrete, mortar and the like, and is expected to be applied in the fields such as utilization of high-strength thermal mortar, high temperature resistant reinforcement materials, corrosion-resistant concrete structures and industrial wastes, rapid repairing materials, high-strength and high-performance materials, and the like. Meanwhile, the industrial waste fly ash can be largely and efficiently utilized; the fly ash based geopolymer has great significance on saving of resources, saving of energy sources and protecting of the environment. A preparation method of the fly ash based geopolymer is also simultaneously provided.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a fly ash-based geological polymer and a preparation method thereof. Background technique [0002] Cement material is the most widely used man-made material. Since the reform and opening up, with the expansion of economic construction scale, my country's cement industry has developed rapidly, and the output of cement has ranked first in the world for many years. According to the statistics of relevant departments, in 2012, my country's annual cement output has exceeded 2 billion tons. Traditional Portland cement is prepared by using limestone, clay and other raw materials through a production process of two grindings and one firing. The calcination temperature is as high as 1450°C. Therefore, the production of traditional Portland cement is a process of high energy consumption, high resource consumption, and high Environmental load industries, for example, the production of 1 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26C04B7/36
CPCC04B28/006Y02P40/10Y02W30/91C04B12/04C04B18/08C04B18/146C04B22/062C04B22/16C04B40/0608
Inventor 谢子令李显杨克家周华飞
Owner WENZHOU UNIVERSITY
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