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Sprayed concrete and preparation method thereof

A shotcrete and nano-powder technology, applied in the field of concrete, can solve the problem of reducing the actual life of high-performance concrete, and achieve the effects of protecting against freeze-thaw damage and various harsh environments, reducing oxidation and rusting, and improving crack resistance and waterproof ability.

Pending Publication Date: 2021-11-12
河南正大金盾环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of science and technology, the construction industry is becoming more and more developed, high-rise buildings, railways, highway bridges, airports, subways, tunnels, urban underground pipe corridors, large storage warehouses, ports, docks, island construction, etc., are all based on High-performance concrete is the main building material. High-performance concrete looks like a whole. Its interior is full of large and small pores and defects. Water enters into it, and various corrosive ions enter it with the help of water, resulting in high-performance concrete. Various failure forms and defects, such as water seepage, freeze-thaw damage, corrosion damage, etc., greatly reduce the actual life of high-performance concrete, and the present invention attempts to fundamentally solve this problem

Method used

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  • Sprayed concrete and preparation method thereof
  • Sprayed concrete and preparation method thereof
  • Sprayed concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare ordinary Portland cement, water, stones, sand, expansion agent, water reducing agent, and waterproof nano powder; the weight of each raw material is: ordinary Portland cement 450Kg, water 132kg, stone 1250kg, sand 550Kg, expansion agent 15kg , water reducing agent 1.2kg, waterproof nano powder 25Kg; wherein waterproof nano powder is made up of following raw materials: mica powder, hydrophobic perlite powder, simethicone, silane coupling agent, surfactant, wherein the weight of each raw material is : Mica powder 56.95Kg, hydrophobic perlite powder 8.23Kg, simethicone 1.0Kg, silane coupling agent 1.05Kg, surfactant 2.31Kg.

[0025] Weigh 56.95Kg of mica powder, 13.23Kg of hydrophobic perlite powder, 1.0Kg of dimethyl silicone oil, 1.05Kg of silane coupling agent, and 3.12Kg of surfactant. Add simethicone oil, silane coupling agent, and surfactant to the reaction kettle in sequence, close the reaction kettle, heat the reaction kettle to 190°C, increase the internal...

Embodiment 2

[0027] Prepare ordinary Portland cement, water, stones, sand, expansion agent, water reducing agent, and waterproof nano powder; the weight of each raw material is: ordinary Portland cement 450Kg, water 140kg, stone 1250kg, sand 550Kg, expansion agent 25kg , water reducing agent 0.7kg, waterproof nano-powder 15Kg; wherein waterproof nano-powder is made up of following raw materials: mica powder, hydrophobic perlite powder, simethicone, silane coupling agent, surfactant, wherein the weight of each raw material is : Mica powder 70Kg, hydrophobic perlite powder 21Kg, simethicone 4Kg, silane coupling agent 1.5Kg, surfactant 2.31Kg.

[0028] Weigh 70Kg of mica powder, 21Kg of hydrophobic perlite powder, 4Kg of simethicone oil, 1.5Kg of silane coupling agent, 2.31Kg of surfactant, and prepare mica powder, hydrophobic perlite powder, dimethyl Add silicone oil, silane coupling agent, and surfactant to the reaction kettle in sequence, close the reaction kettle, heat the reaction kettle...

Embodiment 3

[0030] Prepare ordinary Portland cement, water, stones, sand, expansion agent, water reducing agent, and waterproof nano powder; the weight of each raw material is: ordinary Portland cement 450Kg, water 140kg, stone 1250kg, sand 550Kg, expansion agent 18kg , water reducing agent 0.85kg, waterproof nano powder 19Kg; wherein waterproof nano powder is made up of following raw materials: mica powder, hydrophobic perlite powder, simethicone, silane coupling agent, surfactant, wherein the weight of each raw material is : Mica powder 65Kg, hydrophobic perlite powder 18Kg, simethicone 3.1Kg, silane coupling agent 1.1Kg, surfactant 3.9Kg.

[0031] Weigh 65Kg of mica powder, 18Kg of hydrophobic perlite powder, 3.1Kg of simethicone, 1.1Kg of silane coupling agent, and 3.9Kg of surfactant. Add base silicone oil, silane coupling agent, and surfactant to the reaction kettle in sequence, close the reaction kettle, heat the reaction kettle to 220°C, and raise the internal pressure to 400KPa, ...

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Abstract

The invention relates to the technical field of concrete, and discloses sprayed concrete and a preparation method thereof. According to the invention, an expanding agent is added, and the strong expansion operation of the expanding agent blocks a part of large cavities and defects in the high-performance concrete in the solidification and maintenance stage of the high-performance concrete, so that the anti-cracking and waterproof capabilities of the high-performance concrete structure are preliminarily improved. A waterproof nano powder is added, and the waterproof nano powder has a strong hydrophobic effect and a unique non-metal sheet structure, so that occlusion and connection among coarse and fine aggregates of the high-performance concrete can be effectively promoted, the contact area of a microstructure is enlarged, the porosity is reduced, and the compactness is improved; the movement of water in the high-performance concrete is reduced, the workability of a high-performance concrete mixture is improved, and bleeding and segregation are reduced; and movement of water and various acid radical ions in the high-performance concrete is effectively prevented, the high-performance concrete is protected against freeze-thaw damage and various severe environments, and the service life of the high-performance concrete is prolonged.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to shotcrete and a preparation method thereof. Background technique [0002] With the development of science and technology, the construction industry is becoming more and more developed, high-rise buildings, railways, highway bridges, airports, subways, tunnels, urban underground pipe corridors, large storage warehouses, ports, docks, island construction, etc., are all based on High-performance concrete is the main building material. High-performance concrete looks like a whole. Its interior is full of large and small pores and defects. Water enters into it, and various corrosive ions enter it with the help of water, resulting in high-performance concrete. Various failure forms and defects, such as water seepage, freeze-thaw damage, corrosion damage, etc., greatly reduce the actual life of high-performance concrete, and the present invention attempts to fundamentally solve this pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B24/42C04B22/14C04B103/65
CPCC04B28/04C04B40/0046C04B22/148C04B2103/65C04B2111/00008C04B2111/00155C04B2201/50C04B14/02C04B14/06C04B2103/302C04B14/20C04B14/18C04B24/42C04B2103/40
Inventor 张国敏王为民郭妙影李心悦苏仪方李嘉欣
Owner 河南正大金盾环保材料有限公司
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