Fly ash-based geopolymer mortar repairing material and preparation method thereof

A technology for repairing materials and polymers, applied in cement production and other directions, can solve problems such as soil, water and air pollution, and achieve the effects of dense matrix, high strength and simple preparation process

Inactive Publication Date: 2020-09-08
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rest of the fly ash is discarded in land

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A fly ash base polymer mortar repair material, in parts by weight, comprises the following components:

[0029] 32 parts of low calcium fly ash, 8 parts of water glass solution, 3 parts of NaOH, 1 part of nano silica gel, 1.6 parts of steel fiber, 0.2 parts of calcium carbonate whisker, 8 parts of pure water, 64 parts of medium sand.

[0030] Wherein, the water glass is building water glass, the Baume degree is 35-40, and the modulus of the water glass is 3.0-3.3.

[0031] Better performance can be obtained by adding colloidal nano-silica to the mortar mixture; this is due to better dispersion of colloidal nano-silica, large specific surface area, and greatly reduced degree of agglomeration. Nanoparticles fill more pores and participate in reactions. The fine particles of colloidal nano-silica fill part of the pores and reduce the porosity. The reaction during the polymerization process generates a large amount of aluminosilicate gel and the reaction product of the ma...

Embodiment 2

[0054] A fly ash base polymer mortar repair material, in parts by weight, comprises the following components:

[0055] 45 parts of low calcium fly ash, 12 parts of water glass solution, 4 parts of NaOH, 2 parts of nano silica gel, 2.5 parts of steel fiber, 0.3 parts of calcium carbonate whisker, 11 parts of pure water, 90 parts of medium sand.

[0056] Wherein, the water glass is building water glass, the Baume degree is 35-40, and the modulus of the water glass is 3.0-3.3.

[0057] NaOH is analytically pure solid with a purity of 99.5%.

[0058] The low calcium fly ash powder includes Al 2 o 3 and SiO 2 ; and the particle size of the low-calcium fly ash is in the range of 0.1 μm-50 μm.

[0059] The particle size of the medium sand is in the range of 0.25mm-0.5mm, and the fineness modulus is 1.6-3.7.

[0060] The average particle size of colloidal nano-silica is in the range of 8mm-14mm, the solid content is 30%-35%, and the pH value is 7-7.5.

[0061] The length of the ...

Embodiment 3

[0078] A fly ash base polymer mortar repair material, in parts by weight, comprises the following components:

[0079] 40 parts of low calcium fly ash, 10 parts of water glass solution, 3.5 parts of NaOH, 1.5 parts of nano silica gel, 2 parts of steel fiber, 0.25 parts of calcium carbonate whiskers, 10 parts of pure water, 75 parts of medium sand.

[0080] Wherein, the water glass is building water glass, the Baume degree is 35-40, and the modulus of the water glass is 3.0-3.3.

[0081] NaOH is analytically pure solid with a purity of 99.5%.

[0082] The low calcium fly ash powder includes Al 2 o 3 and SiO 2 ; and the particle size of the low-calcium fly ash is in the range of 0.1 μm-50 μm.

[0083] The particle size of the medium sand is in the range of 0.25mm-0.5mm, and the fineness modulus is 1.6-3.7.

[0084] The average particle size of colloidal nano-silica is in the range of 8mm-14mm, the solid content is 30%-35%, and the pH value is 7-7.5.

[0085] The length of ...

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Abstract

The invention belongs to the technical field of road repairing materials, and concretely relates to a fly ash-based geopolymer mortar repairing material and a preparation method thereof. The repairingmaterial is prepared from, by weight, 32 to 45 parts of low-calcium fly ash, 8 to 12 parts of a water glass solution, 3 to 4 parts of NaOH, 1 to 2 parts of nanometer silicon dioxide gel, 1.6 to 2.5 parts of a steel fiber, 0.2 to 0.3 part of a calcium carbonate whisker, 8 to 11 parts of pure water and 64 to 90 parts of medium sand. The geopolymer mortar repairing material has the characteristics of cleanness, greenness, high strength, short open traffic time, good durability, strong interface effect of new and old concrete and good shrinkage performance.

Description

technical field [0001] The invention belongs to the technical field of road repair materials, and in particular relates to a fly ash base polymer mortar repair material and a preparation method thereof. Background technique [0002] my country's road transportation infrastructure has been greatly developed, and the total mileage of highways ranks first in the world. Up to now, the total mileage of my country's highways has exceeded 4 million kilometers, and more than half of the road surfaces are cement concrete pavements. Due to the increase in traffic volume and road load, the traditional early cement concrete roads were damaged to varying degrees, such as pockmarks, misalignment, cracks, peeling, etc. These damages will have a serious impact on road traffic. [0003] Traditional cement-based repair materials have problems such as weak bonding performance at the interface between old and new cement concrete and high energy consumption, which gradually fail to meet the req...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B14/06C04B14/38C04B14/48C04B111/72
CPCC04B28/006C04B14/06C04B14/48C04B14/383C04B2111/72C04B2111/00008C04B18/08C04B12/04C04B22/062C04B22/002Y02P40/10
Inventor 吴大志陈柯宇易鸣余璐张振营
Owner ZHEJIANG SCI-TECH UNIV
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