High-strength and high-toughness geopolymer material and preparation method thereof

A geopolymer, high-strength and high-toughness technology, applied in the direction of cement production, etc., can solve the problems of limited application and development, large shrinkage, strong brittleness, etc., achieve excellent mechanical strength, small early shrinkage, and improve fluidity

Active Publication Date: 2020-04-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the problems of large early shrinkage, easy cracking, and strong brittleness of geopolymer materials, its application and development are limited. It is urgent to develop a new type of geopolymer material with small early shrinkage, toughness and strength. key issues

Method used

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  • High-strength and high-toughness geopolymer material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) 200g of metakaolin, 150g of fly ash, 50g of red mud, 40g of slag, 40g of silica fume and 20g of Portland cement were mixed, stirred and ground in proportion to obtain a silica-alumina mineral raw material;

[0022] 2) 20g of condensed phosphate, 20g of nano-silicon dioxide, 20g of nano-alumina, and 10g of zeolite are mixed and ground in proportion to obtain a nano-scale high-efficiency modifier;

[0023] 3) Put 2g of superabsorbent resin into 100g of deionized water and let it stand for 10 minutes to obtain a pre-absorbent superabsorbent resin:

[0024] 4) Pour 50g of sodium hydroxide into 600g of liquid sodium silicate in proportion, stir evenly, cool and stand at room temperature for 24 hours to obtain an alkali activator;

[0025] 5) 1g of 5mm long chopped carbon fiber, 1g of 5mm long polypropylene fiber, 1g of 5mm long chopped basalt fiber, 3g of calcium lignosulfonate, 1g of sodium lauryl sulfate are mixed with the alkali activator obtained in step 4) , 50Hz ul...

Embodiment 2

[0028] 1) 300g of metakaolin, 200g of fly ash, 50g of red mud, 50g of slag, 60g of silica fume and 40g of Portland cement were mixed, stirred and ground in proportion to obtain a silica-alumina mineral raw material;

[0029] 2) 50g of condensed phosphate, 40g of nano-silicon dioxide, 40g of nano-alumina, and 20g of zeolite were mixed and ground in proportion to obtain a nano-scale high-efficiency modifier;

[0030] 3) Put 3g of superabsorbent resin into 150g of deionized water and let it stand for 15 minutes to obtain a pre-absorbed superabsorbent resin:

[0031] 4) Pour 130g of sodium hydroxide into 650g of liquid sodium silicate in proportion, stir evenly, cool and stand at room temperature for 24 hours to obtain an alkali activator;

[0032] 5) 3g 5mm long chopped carbon fiber, 2g 5mm long polypropylene fiber, 1g 5mm long chopped basalt fiber, 5g calcium lignosulfonate, 5g sodium lauryl sulfate are mixed with the alkali activator obtained in step 4) , 50Hz ultrasonic dispe...

Embodiment 3

[0035] 1) 250g of metakaolin, 180g of fly ash, 70g of red mud, 50g of slag, 50g of silica fume and 30g of Portland cement were mixed, stirred and ground in proportion to obtain a silica-alumina mineral raw material;

[0036]2) 35g of condensed phosphate, 30g of nano-silicon dioxide, 30g of nano-alumina, and 15g of zeolite were mixed and ground in proportion to obtain a nano-scale high-efficiency modifier;

[0037] 3) Put 4g of superabsorbent resin into 150g of deionized water and let it stand for 20 minutes to obtain a pre-absorbed superabsorbent resin:

[0038] 4) Pour 100g of sodium hydroxide into 650g of liquid sodium silicate in proportion, stir evenly, cool and stand at room temperature for 24 hours to obtain an alkali activator;

[0039] 5) 2g 5mm long chopped carbon fiber, 1.5g 5mm long polypropylene fiber, 1g 5mm long chopped basalt fiber, 3g calcium lignosulfonate, 3g sodium lauryl sulfate and step 4) obtained alkali activator Mixing, 50Hz ultrasonic dispersion for 6...

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Abstract

The invention discloses a high-strength and high-toughness geopolymer material. The high-strength and high-toughness geopolymer material comprises, by weight, 500-700 parts of silicon-aluminum mineralraw materials, 600-800 parts of an alkali activator, 70-150 parts of a nanoscale efficient modifier, 2-5 parts of super absorbent resin, 2-6 parts of a hybrid fiber, 4-10 parts of a surfactant, 700-1000 parts of fine aggregates and 100-150 parts of deionized water, the silicon-aluminum mineral raw materials comprise 200-300 parts of metakaolin, 150-200 parts of fly ash, 50-100 parts of red mud, 40-60 parts of mineral slag, 40-60 parts of silica fume and 20-40 parts of Portland cement, and the nanoscale efficient modifier comprises 20-50 parts of condensed phosphate, 20-40 parts of nano-silica, 20-40 parts of nano-alumina and 10-20 parts of zeolite. The invention further discloses a preparation method of the high-strength and high-toughness geopolymer material. The problems of large earlyself-shrinkage and easy cracking of the geopolymer are solved, and the obtained geopolymer has strong toughness and high strength.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a high-strength and high-toughness polymer 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 the productio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B12/00
CPCC04B28/04C04B2201/50C04B2201/52C04B12/005C04B14/106C04B18/08C04B18/0409C04B18/141C04B18/146C04B22/16C04B14/062C04B14/303C04B14/047C04B24/2641C04B12/04C04B22/062C04B14/386C04B16/0633C04B14/4656C04B24/18C04B24/16C04B14/22C04B14/06Y02P40/10
Inventor 闫东明刘毅张亚军陈士堃
Owner ZHEJIANG UNIV
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