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Graphene oxide-nano mineral enhanced geopolymer material and preparation method thereof

A technology of geopolymer and graphene, which is applied in the field of graphene oxide-nano-mineral reinforced geopolymer materials and its preparation, can solve the problems of uniform dispersion restricting large-scale applications, and the enhanced performance has not been fully exerted, achieving excellent Effects of compactness and mechanical strength, reduction of total porosity, improvement of quantity and uniformity

Active Publication Date: 2020-04-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nano-minerals such as nano-silica, nano-alumina, nano-silicon, and nano-clay can induce the nucleation of geopolymers, reduce the setting time of geopolymer materials, fill pores, and greatly improve the mechanical strength and durability of geopolymers. , but the uniform dispersion of nano-minerals in geopolymers has restricted large-scale applications
The surface of graphene oxide has a good dispersion effect because it has abundant functional groups such as hydroxyl and carboxyl groups, but its unique enhancement performance has not been fully utilized. Therefore, how to make full use of the performance and dispersion effect of graphene oxide to make it Synergistically improving the toughness and strength of geopolymer materials with nano-minerals has become a key issue that needs to be solved urgently

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Preparation of geopolymer reaction powder: 240g of metakaolin, 150g of fly ash, 30g of granulated blast furnace slag, 18g of Portland cement, and 12g of nano-silicon dioxide were mixed, stirred and ground in proportion;

[0021] 2) Preparation of graphene oxide-sodium hydroxide solution: 18 g of solid sodium hydroxide, 39 g of deionized water, and 3 g of graphene oxide were mixed, and obtained by ultrasonic dispersion at 50 Hz for 60 minutes;

[0022] 3) Prepare graphene oxide-alkali excitation solution: mix 120g liquid sodium silicate with the graphene oxide-sodium hydroxide solution obtained in step 2), and 50 Hz ultrasonic dispersion for 60 minutes to form a uniform graphene oxide-alkali excitation solution;

[0023] 4) Preparation of graphene oxide-nanometer mineral-enhanced geopolymer material: continuously stir the graphene oxide-alkali excitation solution obtained in step 3), and add the geopolymer reaction powder obtained in step 1), and mix evenly to obtain ...

Embodiment 2

[0025] 1) Preparation of geopolymer reaction powder: 246g of metakaolin, 153g of fly ash, 45g of granulated blast furnace slag, 24g of Portland cement, and 12g of nano-silicon dioxide were mixed, stirred and ground in proportion;

[0026] 2) Preparation of graphene oxide-sodium hydroxide solution: 21 g of solid sodium hydroxide, 42 g of deionized water, and 6 g of graphene oxide were mixed, and obtained by ultrasonic dispersion at 50 Hz for 80 minutes;

[0027] 3) Prepare graphene oxide-alkali excitation solution: mix 135g liquid sodium silicate with the graphene oxide-sodium hydroxide solution obtained in step 2), and 50 Hz ultrasonic dispersion for 60 minutes to form a uniform graphene oxide-alkali excitation solution;

[0028] 4) Preparation of graphene oxide-nanometer mineral-enhanced geopolymer material: continuously stir the graphene oxide-alkali excitation solution obtained in step 3), and add the geopolymer reaction powder obtained in step 1), and mix evenly to obtain ...

Embodiment 3

[0030] 1) Preparation of geopolymer reaction powder: 210g of metakaolin, 135g of fly ash, 30g of granulated blast furnace slag, 15g of Portland cement, and 6g of nano-silicon dioxide were mixed, stirred and ground in proportion;

[0031] 2) Preparation of graphene oxide-sodium hydroxide solution: 15 g of solid sodium hydroxide, 30 g of deionized water, and 3 g of graphene oxide were mixed, and obtained by ultrasonic dispersion at 40 Hz for 60 minutes;

[0032] 3) Preparation of graphene oxide-alkali excitation solution: 105g of liquid sodium silicate was mixed with the graphene oxide-sodium hydroxide solution obtained in step 2), and 40 Hz ultrasonic dispersion was performed for 30 minutes to form a uniform graphene oxide-alkali excitation solution;

[0033] 4) Preparation of graphene oxide-nanometer mineral-enhanced geopolymer material: continuously stir the graphene oxide-alkali excitation solution obtained in step 3), and add the geopolymer reaction powder obtained in step 1...

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Abstract

The invention discloses a graphene oxide-nano mineral enhanced geopolymer material and a preparation method thereof. The graphene oxide-nano mineral enhanced geopolymer material comprises the following components in parts by weight: 130-160 parts of a silicon-aluminum mineral raw material, 50-70 parts of an alkali activator, 2-6 parts of nano minerals and 1-3 parts of graphene oxide. The inventionalso discloses a preparation method of the graphene oxide-nano mineral enhanced geopolymer material. The preparation method comprises the following steps: 1) preparing a geopolymer raw material; 2) preparing a graphene oxide-sodium hydroxide solution; 3) preparing a graphene oxide-alkali excitation solution; and 4) preparing the graphene oxide-nano mineral enhanced geopolymer material. The problem of uniform dispersion of nano minerals in the geopolymer system is solved, and the toughness and the strength of the geopolymer material are improved through cooperation of the graphene oxide and the nano minerals by fully utilizing the performance and the dispersion effect of the graphene oxide.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a graphene oxide-nanometer mineral reinforced geopolymer material and a preparation method thereof. Background technique [0002] Geopolymer material is a new type of material with a special inorganic polycondensation three-dimensional oxide network structure. This material is made of minerals rich in silicon and aluminum, and it is produced by alkali excitation reaction with liquid sodium silicate, sodium hydroxide and other solutions. , Geopolymer materials have more excellent properties than traditional silicate materials, including: rapid hardening and early strength, good acid and alkali resistance, fire resistance, high temperature resistance, and high efficiency of solid heavy metal ions. In addition, the raw materials of geopolymers mostly come from industrial wastes such as fly ash, blast furnace slag, mine waste slag, etc. The carbon emissions and energy consumption in...

Claims

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Application Information

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IPC IPC(8): C04B28/00
CPCC04B28/006C04B2111/00008C04B2201/50C04B14/106C04B18/08C04B18/142C04B7/02C04B12/04C04B22/062C04B14/06C04B14/303C04B14/36C04B14/10C04B14/024Y02P40/10
Inventor 张亚军陈士堃闫东明刘毅
Owner ZHEJIANG UNIV
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