Preparation method of single-component early-strength quick-setting geopolymer

A geopolymer and one-component technology, which is applied in the field of preparation of one-component early-strength quick-setting geopolymers, can solve the problems of large differences in product performance of geopolymer materials, large differences in the ratio of silicon and aluminum elements, and Problems such as large differences in activity of mineral components, to achieve the effect of improving volume stability, increasing fineness and specific surface area, and reducing energy consumption

Active Publication Date: 2022-04-12
SHANGHAI LIYANG ROAD REINFORCEMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Commonly used geopolymer mineral raw materials are one or more composites of mineral powder, fly ash, and metakaolin. The performance of geopolymers is greatly affected by raw materials, and the composition of various mineral materials varies greatly. Silicon and aluminum The large difference in the proportion of elements and the large difference in the activity of mineral components lead to large differences in product performance, poor stability, difficult application, and difficult preparation of geopolymer materials, which lead to extremely limited applications, and excellent early performance and Chemical stability i

Method used

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  • Preparation method of single-component early-strength quick-setting geopolymer

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Embodiment 1

[0025] A single-component early-strength and quick-setting geopolymer material. The raw materials include the following components: 28 parts of red mud, 35 parts of blast furnace slag, 7 parts of anhydrite, 20 parts of solid activator, 8 parts of fly ash, and additives 2 servings.

[0026] The solid activator is a mixture of caustic alkali and sodium silicate in a weight ratio of 1:10, the admixture is 0.5 parts of polycarboxylate water reducer, and 1.5 parts of redispersible latex powder.

[0027] A preparation method of a one-component early-strength quick-setting geopolymer material, comprising the following steps:

[0028] 1) Put the dried red mud, blast furnace slag, and anhydrite into a rotary kiln for calcination, the calcination temperature is 800°C, the calcination time is 3h, and cool for later use;

[0029] 2) Preliminarily crush the cooled mixed material, add solid activator and fly ash, send it into the vertical mill, fully mix the material and grind it fully unt...

Embodiment 2

[0032] A single-component early-strength quick-setting geopolymer material. The raw materials include the following components: 25 parts of red mud, 40 parts of blast furnace slag, 7 parts of anhydrite, 18 parts of solid activator, 7.5 parts of fly ash, and additives 2.5 servings.

[0033] The solid activator is a mixture of caustic alkali and sodium silicate in a weight ratio of 1:10, and the admixtures are 0.5 parts of polycarboxylate superplasticizer and 1.5 parts of sodium bentonite.

[0034] A preparation method of a one-component early-strength quick-setting geopolymer material, comprising the following steps:

[0035] 1) Put the dried red mud, blast furnace slag, and anhydrite into a rotary kiln for calcination, the calcination temperature is 900°C, the calcination time is 2h, and cool down for later use;

[0036]2) Preliminarily crush the cooled mixed material, add solid activator and fly ash, send it into the vertical mill, fully mix the material and grind it fully u...

Embodiment 3

[0039] A single-component early-strength quick-setting geopolymer material. The raw materials include the following components: 30 parts of red mud, 38 parts of blast furnace slag, 5 parts of anhydrite, 16.5 parts of solid activator, 9.2 parts of fly ash, and additives 1.3 servings.

[0040] The solid activator is a mixture of caustic soda and sodium silicate in a weight ratio of 1:10, and the admixtures are 0.2 parts of polycarboxylate superplasticizer, 1 part of sodium bentonite, and 0.1 part of cellulose ether.

[0041] A preparation method of a one-component early-strength quick-setting geopolymer material, comprising the following steps:

[0042] 1) Put the dried red mud, blast furnace slag, and anhydrite into a rotary kiln for calcination, the calcination temperature is 1000°C, the calcination time is 1h, and it is cooled for later use;

[0043] 2) Preliminarily crush the cooled mixed material, add solid activator and fly ash, send it into the vertical mill, fully mix t...

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Abstract

The invention discloses a preparation method of a single-component early-strength quick-setting geopolymer. The preparation method comprises the following steps: S1, uniformly mixing red mud, blast furnace slag and anhydrite according to a certain mass ratio, and calcining; s2, crushing the calcined solid material, and adding 20-30% by mass of a solid alkaline activator and 10-15% by mass of fly ash; and S3, after mixing, grinding to obtain powder of the geopolymer material, adding other additives, and uniformly mixing. According to the preparation method of the single-component early-strength quick-setting type geopolymer, water can be directly added for mixing application, and the single-component early-strength quick-setting type geopolymer can be quickly reacted and hardened and has excellent physical and chemical properties; on one hand, the activity of the slag and the red mud can be improved, and on the other hand, various metallurgical waste residues such as the red mud and the blast furnace slag are jointly treated and converted into the geopolymer material, so that the treatment difficulty of solid waste resources is reduced, and the utilization rate and the use value of the solid waste resources are greatly improved.

Description

technical field [0001] The invention relates to a preparation method of a geopolymer, in particular to a preparation method of a one-component early-strength quick-setting geopolymer. Background technique [0002] Red mud is the industrial solid waste discharged when the aluminum industry extracts alumina. Because the chemical alkali combined with red mud is difficult to remove and has a large content, and contains fluorine, aluminum and other impurities, it is harmful to the use of red mud. It has always been difficult to do. In addition to occupying a large amount of land during the stacking process of red mud, it is also easy to cause land alkalization and groundwater pollution due to the infiltration of chemical components in red mud into the land. Red mud contains SiO 2 、Al 2 o 3 , CaO, Fe 2 o 3 etc., its activity is low. At present, domestic and foreign methods of processing red mud mainly include sintering method, combined method and Bayer method. The comprehen...

Claims

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Application Information

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IPC IPC(8): C04B12/00C04B28/00
CPCY02P40/10
Inventor 季晓丽李熙
Owner SHANGHAI LIYANG ROAD REINFORCEMENT TECH
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