Crack-resistant penetration-resistant agent for concrete and preparation method of crack-resistant penetration-resistant agent for concrete

An anti-seepage agent and concrete technology, which is applied in the field of concrete admixtures, can solve the problems of poor graphene dispersion and weak bonding force between sulfonated graphene and concrete, so as to improve the impermeability, flexural, tensile and crack resistance, The effect of improving durability

Active Publication Date: 2017-04-26
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the existing problems of poor dispersion of graphene, weak bonding between sulfonated graphene and concrete, and the introduction of corrosive ions into the capillary pores of concrete, the present invention provides a method that can enhance the crack resistance and impermeability of concrete and improve the performance of concrete. Concrete anti-cracking and anti-seepage agent with waterproof effect and preparation method thereof

Method used

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  • Crack-resistant penetration-resistant agent for concrete and preparation method of crack-resistant penetration-resistant agent for concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 3.1g of γ-aminopropyltriethoxysilane, 70g of sulfonated graphene aqueous solution with a mass concentration of 10%, and 0.035g of emulsifier Tween 60, mix them evenly and add them to Reactor 1, heat to 40°C, and stir at 40°C 6h, the stirring speed is 300rpm, and the modified sulfonated graphene emulsion is obtained.

[0023] The above-mentioned modified sulfonated graphene emulsion 73.1g, n-decyl alcohol 10g, Pingpingjia 151g, defoamer 0.01g and water 905.6g were added in the shear kettle 2 and stirred at room temperature under 2000rpm for 1h to obtain concrete crack resistance penetrating agent.

Embodiment 2

[0025] Take 9.5g of γ-aminopropyltriethoxysilane, 210g of sulfonated graphene aqueous solution with a mass concentration of 10%, and 0.21g of emulsifier Tween 80, mix them evenly and add them to Reactor 1, heat to 50°C, and stir at 50°C 8h, the stirring speed is 700rpm, and the modified sulfonated graphene emulsion is obtained.

[0026] The above-mentioned modified sulfonated graphene emulsion 219.7g, undecyl alcohol 70g, Pingpingjia 255g, defoamer 0.03g and water 674.6g were added in the shear kettle 2 and stirred at room temperature under 2500rpm for 1h to obtain concrete crack resistance penetrating agent.

Embodiment 3

[0028] Take 15.3g of γ-aminopropyltrimethoxysilane, 340g of sulfonated graphene aqueous solution with a mass concentration of 10%, and 0.68g of emulsifier EL-40, mix them evenly and add them to Reactor 1, heat to 60°C, and stir at 60°C for 10h , the stirring speed is 1200rpm, and the modified sulfonated graphene emulsion is obtained.

[0029] The above-mentioned modified sulfonated graphene emulsion 356.0g, dodecyl alcohol 140g, Pingpingjia 25 10g, defoamer 0.07g and water 444.0g were added in the shear kettle 2 and stirred at room temperature under 3000rpm for 2h to obtain concrete crack resistance penetrating agent.

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Abstract

The invention discloses a crack-resistant penetration-resistant agent for concrete and a preparation method of the crack-resistant penetration-resistant agent for the concrete. The crack-resistant penetration-resistant agent for the concrete is prepared from, by weight, 1-10% of modified sulfonated graphene, 1-15% of hydrophobic substance, 0.1-2% of emulgator A, 0.001-0.01% of defoaming agent and the balance water. The modified sulfonated graphene having excellent binding force with the concrete is prepared by modifying sulfonated graphene by amino silane; the crack-resistant penetration-resistant agent for the concrete, which can be stored stably, is prepared by compositing crack resistance, pore closure effects and hydrophobic substance waterproofness of two-dimensional sheet-like nano-materials of the modified sulfonated graphene. The crack-resistant penetration-resistant agent for the concrete has the advantages that the crack-resistant penetration-resistant agent is capable of improving resistance to fracture and crack and tensile strength of the concrete and preventing water and chloride salts to pass through capillary pores and enter the inside of the concrete, so that penetration resistance of the concrete is improved, and concrete durability is enhanced substantially.

Description

technical field [0001] The invention relates to the field of concrete admixtures, in particular to a concrete anti-crack and anti-seepage agent and a preparation method thereof. Background technique [0002] Major engineering projects such as roads, bridges, railways, nuclear power, hydropower, ports, and oceans are being constructed on a large scale, but the main defects of concrete are brittleness, cracks, and penetration. Shortened lifespan. [0003] Graphene is a flake graphite, and each carbon atom on the monoatomic layer plane is connected to three other carbon atoms through a strong σ bond. These strong C-C bonds make the graphene sheet have excellent structural rigidity; The nanoscale microscopic distortions existing on the graphene plane make its structure more stable. Graphene, as the flexible sheet material with the highest strength and hardness, can improve the brittleness of cement, increase the toughness of concrete, reduce the generation of micro-cracks, imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B111/27
Inventor 蒋永菁李磊王瑞李全龙张小磊韩旭
Owner JIANGSU SOBUTE NEW MATERIALS
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