Sulfate corrosion resistant graphene-concrete composite material and preparation method thereof

A composite material and sulfate-resistant technology, which is applied in the field of building materials, can solve the problems of complex preparation process of modified graphene, technical research on its own structure, and low degree of dispersion, so as to achieve good sulfate corrosion resistance, cost control, and The effect of simple preparation process

Active Publication Date: 2017-06-09
THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] Chinese invention patent application (publication number CN104386959A) discloses a preparation method of adding fibers to improve the cracking resistance of cement. The invention uses basalt fibers, polypropylene fibers, and glass fibers as raw materials, and uses self-prepared water reducers for concrete mixing and preparation , to obtain concrete with anti-cracking properties, but this method is common, and no research has been done on the technology involved in the self-structure formed by the cement hydration process
Chinese invention patent application (CN104058676A) discloses a method for preparing high-toughness concrete by adding modified graphene. The modified graphene is water-soluble graphene with hydroxyl groups on the surface. The modified graphene is used to obtain The high toughness concrete shows good strain hardening or deformation hardening properties, but the preparation process of this modified graphene is complicated and the degree of dispersion is not high
At present, there is no research on improving the sulfate attack resistance of concrete by combining graphene with glass fiber through a simple and easy method and applying it to concrete materials.

Method used

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  • Sulfate corrosion resistant graphene-concrete composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Preparation of graphene concrete resistant to sulfate attack:

[0056] 1) Weigh 500g of graphene, add it into 250L solvent prepared by water and ethanol according to the ratio of 9:1, add glacial acetic acid to adjust the pH to 6.5 while stirring, stir well, then slowly add 300gTEC6300 into the solution dropwise, Ultrasonic dispersion was performed for 40 minutes to obtain a graphene dispersion liquid, which was ready for use after completion.

[0057] 2) Weigh 45 kg of glass fiber, add it to 100 L of deionized water, adjust the pH value of the above solution to 9 with NaOH solution, and disperse it ultrasonically for 60 min. After the completion of suction filtration, the glass fiber is placed in a drying oven and dried to a constant weight at a temperature of 105°C for use.

[0058] 3) Weigh 40kg from step 2) and add it to 200L of the graphene dispersion obtained in step 1), disperse it by ultrasonic for 60 minutes, filter it with suction after completion, and then p...

Embodiment 2

[0062] Preparation of graphene concrete resistant to sulfate attack:

[0063] 1) Weigh 600g of graphene, add it to the 300L solvent prepared by water and ethanol according to the ratio of 6:1, add glacial acetic acid to adjust the pH to 6.5 while stirring, after stirring evenly, slowly add 300gTEC6300 to the solution, Ultrasonic dispersion was performed for 90 minutes to obtain a graphene dispersion liquid, which was ready for use after completion.

[0064] 2) Weigh 45 kg of glass fiber, add it to 100 L of deionized water, adjust the pH value of the above solution to 10 with NaOH solution, and disperse it ultrasonically for 60 min. After the completion of suction filtration, the glass fiber is placed in a drying oven and dried to a constant weight at a temperature of 105°C for use.

[0065] 3) Weigh 40kg from step 2) and add it to 200L of the graphene dispersion obtained in step 1), ultrasonically disperse for 90 minutes, and then filter with suction, then place the glass fib...

Embodiment 3

[0069] Preparation of graphene concrete resistant to sulfate attack:

[0070] 1) Weigh 500g of graphene, add it to 250L solvent prepared by water and ethanol according to the ratio of 9:1, add glacial acetic acid to adjust the pH to 6.5 while stirring, stir well, then slowly add 250gTEC6300 to the solution dropwise, Ultrasonic dispersion was performed for 60 minutes to obtain a graphene dispersion liquid, which was ready for use after completion.

[0071] 2) Weigh 45 kg of glass fiber, add it to 100 L of deionized water, adjust the pH value of the above solution to 9 with NaOH solution, and disperse it ultrasonically for 60 min. After the completion of suction filtration, the glass fiber is placed in a drying oven and dried to a constant weight at a temperature of 105°C for use.

[0072] 3) Weigh 40kg from step 2) and add it to 200L of the graphene dispersion obtained in step 1), ultrasonically disperse for 120min, and then filter with suction after completion, then place the...

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Abstract

The invention discloses a graphene modified glass fiber preparation method, a sulfate corrosion resistant graphene-concrete composite material and a preparation method thereof. The sulfate corrosion resistant graphene-concrete composite material is prepared from 150-240kg/m<3> of cement, 45-50kg/m<3> of coal ash, 40-60kg/m<3> of silicon ash, 600-900kg/m<3> of coarse aggregates, 70-120kg/m<3> of river sand, 20-50kg/m<3> of nano silicon dioxide, 30-50kg/m<3> of graphene modified glass fibers, 1-7.5kg/m<3> of a water reducing agent and 105-150kg/m<3> of water. By high strength and flexibility and large specific surface area of graphene, glass fiber clusters are open and roughened to be grafted to a graphene network, and consequently the graphene/concrete composite material high in strength, toughness and sulfate corrosion resistance are obtained.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a sulfate-resistant graphene concrete composite material and a preparation method thereof. Background technique [0002] The examples of reinforced concrete structures damaged by sulfate corrosion in my country and around the world have been frequently reported. In recent years, many areas in the world have suffered from the erosion of sulfate-type acid rain, and sulfate corrosion has often occurred. The influencing factors of sulfate erosion are very complex, and it has become a very harmful environmental water erosion. Sulfate ions in the environment penetrate into the interior of the concrete and react with hydration products, resulting in expansion, cracking, peeling, etc., thereby reducing and losing the strength and viscosity of the concrete. With the extensive use of concrete, the durability of concrete materials is becoming more and more serious. In recent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/02C04B111/20
CPCC04B20/023C04B28/04C04B2111/2015C04B18/08C04B18/146C04B14/06C04B14/062C04B14/024C04B14/02C04B14/42C04B2103/302
Inventor 蒋晓峰赖健平郑雅轩张娟娟瞿研
Owner THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH
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