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A high-efficiency concrete performance enhancing additive and its preparation method

An additive and concrete technology, applied in the field of building materials, can solve the problems of restricting the application of concrete materials, limited waterproof ability of additives, poor self-compactness of concrete, etc., and achieves the effect of improving the resistance to temperature difference change, improving the corrosion resistance and enhancing the bonding force.

Inactive Publication Date: 2019-03-26
江苏汉普顿新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the characteristics of its own structure, concrete materials often suffer from poor self-tightness, splitting, axial tension, poor flexural strength, cracking and leakage during use, especially for those underground and underwater structural projects, which seriously affect and restrict the application of concrete materials
[0003] Therefore, various additives related to improving and improving the anti-cracking, anti-seepage, etc. of concrete materials and other concrete properties have been continuously proposed, such as some early additives such as wood calcium and magnesium oxide that can improve the anti-cracking and anti-seepage ability of concrete by generating expansion. In addition, there are some organic types, such as silicone, aliphatic, etc.; but these additives have limited water resistance and cannot last

Method used

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  • A high-efficiency concrete performance enhancing additive and its preparation method
  • A high-efficiency concrete performance enhancing additive and its preparation method
  • A high-efficiency concrete performance enhancing additive and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First in parts by mass: titanate phosphate compounds (600 mesh, R 1 =C 8 , R 2 =C 12 ) 10 parts, zinc oxide (500 mesh) powder 6 parts, activated carbon (800 mesh) 5 parts, white carbon black powder (1200 mesh) 20 parts are sent into the mixer and fully mixed for 5 minutes to make powder. Then add 40 parts of polyester fibers (10 mm in length and 20 μm in diameter) to obtain product 1.

[0024] In order to test the performance of high-efficiency concrete performance-enhancing additives, the following methods are used for evaluation:

[0025] 1. Preparation of reference concrete

[0026] The benchmark concrete gradation is C35 concrete, see Table 1

[0027] Table I

[0028]

[0029] 2. Add high-efficiency concrete performance-enhancing additives to the benchmark concrete gradation C35, see

[0030] Table II

[0031]

Embodiment 2

[0033] First in parts by mass: titanate phosphate compounds (800 mesh, R 1 =C 10 , R 2 =C 14 ) 12 parts, zinc oxide (600 mesh) powder 6 parts, activated carbon (1000 mesh) 5 parts, white carbon black powder (2000 mesh) 20 parts are sent into the blender and fully mixed for 10 minutes to make powder. Then add 40 parts of polyester fiber (15 mm in length and 25 μm in diameter) to obtain product 2.

Embodiment 3

[0035] First in parts by mass: titanate phosphate compounds (1000 mesh, R 1 =C 10 , R 2 =C 16 ) 13 parts, zinc oxide (800 mesh) powder 6 parts, activated carbon (1200 mesh) 5 parts, white carbon black powder (3000 mesh) 20 parts are sent into the mixer and fully mixed for 12 minutes to make powder. Then add 40 parts of polyester fibers (15 mm in length and 20 μm in diameter) to obtain product 3.

[0036] 3. The preparation method is to add 1 kg of performance-enhancing additive products to 1 cubic meter of reference concrete (C35) to obtain concrete samples 1-3, and then test each concrete sample. The performance comparison is shown in the table below.

[0037] Table three

[0038] Pilot projects

[0039] Conclusion: It can be seen from the above table that concrete 1-3 adds high-efficiency concrete performance-enhancing additives to concrete, so that the increase rate of concrete impact and wear resistance is 8.7%-9.5%; durability > 300 times; splitting and axia...

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Abstract

The invention relates to an efficient concrete performance enhancement additive. The additive is characterized by containing the following components in parts by mass: 10-15 parts of a coupling agent, 4-6 parts of zinc oxide powder, 4-5 parts of activated carbon, 20-25 parts of white carbon black and 30-40 parts of polyester fiber. The additive is prepared by the steps of mixing weighed titanic acid phosphate ester, zinc oxide powder, activated carbon and white carbon black powder into a stirring machine, mixing, distributing to packaging bags according to the weight, and weighing and feeding required polyester fiber into packaged powder bags, so as to obtain a finished product. According to the efficient concrete performance enhancement additive, the impaction resistance, wear resistance, durability, splitting tension strength, axial tension strength and bending strength of concrete are greatly enhanced, the adiabatic temperature rise is decreased, the cracking resistance and the permeability resistance are improved, and the waterproof protecting period of the concrete to a building is greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a performance-enhancing additive for concrete that improves impact resistance, wear resistance, durability, splitting, axial tension, bending strength, reduces adiabatic temperature rise, prevents cracking and seepage, and a preparation method thereof . Background technique [0002] Concrete usually refers to the use of cement as the cementitious material, sand and stone as the aggregate, mixed with water in a certain proportion, and obtained by mixing. It has the characteristics of rich raw materials, low price and simple production process, which makes it widely used, especially suitable for nuclear power, water conservancy and hydropower, subways, high-speed rails, roads, bridges, tunnels and other projects. Due to the characteristics of its own structure, concrete materials often suffer from poor self-tightness, splitting, axial tension, poor flexural ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/40
CPCC04B40/0039C04B24/40C04B22/06C04B14/022C04B14/06C04B16/0683
Inventor 耿晓滨关建宁丁卫芳齐树平
Owner 江苏汉普顿新材料科技有限公司
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