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Self-compacting reactive powder concrete as well as preparation method and application thereof

An active powder, self-compacting technology, applied in the field of building materials, can solve the problems of difficulty in stirring and molding, complex preparation process, low water-to-binder ratio, etc., and achieve the effects of good strength, simple preparation process and good construction performance.

Inactive Publication Date: 2019-04-02
SHENZHEN POWER SUPPLY BUREAU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water-binder ratio of RPC is very low, the rheology is poor, and mixing and molding are more difficult than ordinary concrete. During preparation, it is necessary to use vibration, pressure, manual assistance and other molding methods to meet the compactness requirements, which makes the preparation process complicated.

Method used

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  • Self-compacting reactive powder concrete as well as preparation method and application thereof
  • Self-compacting reactive powder concrete as well as preparation method and application thereof
  • Self-compacting reactive powder concrete as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～ Embodiment 5

[0048] Examples 1 to 5: Self-compacting reactive powder concrete under different water-binder ratios.

[0049] See Table 2 for the raw materials, and see Table 3 for the properties of the prepared self-compacting reactive powder concrete.

[0050] Preparation:

[0051] (1) Take each raw material according to Table 2, pour quartz powder and quartz sand (a mixture of fine sand, medium sand and coarse sand) into the mixer, and dry mix until the materials of four particle sizes are evenly mixed;

[0052](2) Pour the cement, silica fume, fly ash and microbeads into the mixer, and dry stir until the mixture of the gel material and the quartz sand is uniform, and the time is about 3 to 5 minutes;

[0053] (3) Mix the water and the new non-naphthalene-based water reducer AN3000 evenly, divide them into two parts, put half into the blender, stir for about 5-8 minutes, then add the remaining half into the blender, stir evenly to form a slurry Body, that is, the required self-compactin...

Embodiment 6～ Embodiment 11

[0062] Example 6 to Example 11: Self-compacting active powder concrete under different silica fume cement ratios. See Table 4 for the raw materials, and see Table 5 for the properties of the prepared self-compacting reactive powder concrete.

[0063] Preparation:

[0064] (1) Take each raw material according to Table 4, pour quartz powder and quartz sand (a mixture of fine sand, medium sand and coarse sand) into the mixer, and dry mix until the materials of four particle sizes are evenly mixed;

[0065] (2) Pour the cement, silica fume, fly ash and microbeads into the mixer, and dry stir until the mixture of the gel material and the quartz sand is uniform, and the time is about 3 to 5 minutes;

[0066] (3) Mix the water and the new non-naphthalene-based water reducer AN3000 evenly, divide them into two parts, put half into the blender, stir for about 5-8 minutes, then add the remaining half into the blender, stir evenly to form a slurry Body, that is, the required self-compa...

Embodiment 16～ Embodiment 20

[0087] Examples 16 to 20: Self-compacting reactive powder concrete with different amounts of quartz powder.

[0088] See Table 8 for the raw materials, and see Table 9 for the properties of the prepared self-compacting reactive powder concrete.

[0089] Preparation:

[0090] (1) Take each raw material according to Table 8, pour quartz powder and quartz sand (a mixture of fine sand, medium sand and coarse sand) into the mixer, and dry mix until the materials of four particle sizes are evenly mixed;

[0091] (2) Pour the cement, silica fume, fly ash and microbeads into the mixer, and dry stir until the mixture of the gel material and the quartz sand is uniform, and the time is about 3 to 5 minutes;

[0092] (3) Mix the water and the new non-naphthalene-based water reducer AN3000 evenly, divide them into two parts, put half into the blender, stir for about 5-8 minutes, then add the remaining half into the blender, stir evenly to form a slurry Body, that is, the required self-co...

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Abstract

The invention relates to self-compacting reactive powder concrete as well as a preparation method and application thereof. The self-compacting reactive powder concrete is mainly prepared from the following components, in parts by mass: 100 parts of cement, 20-25 parts of silica fume, 10-20 parts of fly ash, 4-6 parts of microbeads, 30-40 parts of quartz powder, 80-200 parts of quartz sand and 3-6parts of a water reducing agent. The self-compacting reactive powder concrete combines the advantages of self-compacting concrete and reactive powder concrete, has higher strength and durability and excellent cohesiveness, is suitable for the harsh corrosive environment in coastal areas, and provides great convenience in cast-in-place construction.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to self-compacting active powder concrete and a preparation method thereof. Background technique [0002] Reactive Powder Concrete (RPC) is a new type of cement-based composite material with high strength, high toughness and high durability. It was first developed by the French Bouygues company at the end of the 20th century. , quartz powder, silica fume, high-efficiency water reducer and supplemented by an appropriate curing system. Due to the increase in the fineness and reactivity of the components, it is called active powder concrete. [0003] Since PRC is a cement-based composite material produced from various raw materials through specific process conditions, its mechanical and physical properties have been greatly improved compared with traditional concrete. Especially for coastal areas, where the corrosion environment is harsh and accompanied by strong typhoons, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/146C04B18/08C04B20/0016C04B14/06C04B2103/302
Inventor 师人杰向真王晨王德弘鞠彦忠马一丹
Owner SHENZHEN POWER SUPPLY BUREAU
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