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High-strength self-compacting concrete and preparation method thereof

A self-compacting concrete and high-strength technology, which is applied in the field of concrete, can solve problems such as concrete cracking, and achieve the effects of less cracking, better overall quality, and improved compactness

Inactive Publication Date: 2020-07-14
上海兆捷实业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above application documents, by controlling the proportion of river sand, fly ash, silica fume, slag powder and quartz powder, and by controlling the particle size of river sand, the strength of high-strength concrete can more easily meet the requirements of high-strength engineering construction. However, when concrete is used in areas with high sulfate ion content, sulfate ions will gradually penetrate into the interior of the concrete specimen and react with cement hydration products and alkaline solutions in the voids to form a The sulfate product of stress, when the expansion stress reaches a certain level, will lead to cracking of the concrete as a whole, therefore, a new solution needs to be proposed to solve the above problems

Method used

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  • High-strength self-compacting concrete and preparation method thereof
  • High-strength self-compacting concrete and preparation method thereof
  • High-strength self-compacting concrete and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Embodiment 1: A kind of high-strength self-compacting concrete, each component and its corresponding parts by weight are shown in Table 1, and are prepared through the following steps:

[0043] Step 1, stirring and mixing the medium sand, crushed stone raw materials, fly ash, cement raw materials, mineral powder and quartz powder in corresponding parts by weight, the stirring speed is 40rpm, and the stirring time is 25min to obtain the mixture;

[0044] Step 2: Mix the water reducer and water in the mixing station, and continue stirring at a stirring speed of 15 rpm for 4 minutes to obtain a mixed liquid;

[0045] Step 3: Stir and mix the mixture with the mixture, continue stirring for 8 minutes at a stirring speed of 35 rpm, then add magnesium fluorosilicate in corresponding parts by weight, and continue stirring for 4 minutes to obtain high-strength self-compacting concrete.

[0046] Note: In the above steps, the crushed stone raw materials are selected from secondary...

Embodiment 2

[0047] Embodiment 2: A kind of high-strength self-compacting concrete, differs from Embodiment 1 in that it is prepared through the following steps:

[0048] Step 1, stirring and mixing the medium sand, crushed stone raw material, fly ash, cement raw material, mineral powder and quartz powder in corresponding parts by weight, the stirring speed is 30rpm, and the stirring time is 30min to obtain the mixture;

[0049] Step 2: Mix the water reducer and water in the mixing station, and continue stirring at a stirring speed of 10 rpm for 5 minutes to obtain a mixed liquid;

[0050] Step 3: Stir the mixed liquid and the mixture, keep stirring for 10 minutes at a stirring speed of 30 rpm, then add magnesium fluorosilicate in corresponding parts by weight, and keep stirring for 5 minutes to obtain high-strength self-compacting concrete.

Embodiment 3

[0051] Embodiment 3: A kind of high-strength self-compacting concrete, differs from Embodiment 1 in that it is prepared through the following steps:

[0052] Step 1, stirring and mixing medium sand, crushed stone raw materials, fly ash, cement raw materials, mineral powder and quartz powder in corresponding parts by weight, the stirring speed is 50 rpm, and the stirring time is 20 minutes to obtain a mixture;

[0053] Step 2: Mix the water reducer and water in the mixing station, and continue to stir at a stirring speed of 20 rpm for 3 minutes to obtain a mixed solution;

[0054] Step 3: Stir the mixed liquid and the mixture, keep stirring for 6 minutes at a stirring speed of 40 rpm, then add magnesium fluorosilicate in corresponding parts by weight, and keep stirring for 3 minutes to obtain high-strength self-compacting concrete.

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Abstract

The invention discloses high-strength self-compacting concrete and a preparation method thereof, relates to the technical field of concrete, and solves the problem that the whole concrete is cracked due to the fact that sulfate ions easily erode the concrete, and the high-strength self-compacting concrete comprises the following components in parts by weight: 420-460 parts of a cement raw material; 58 to 62 parts of mineral powder; 50 to 60 parts of fly ash; 850 to 860 parts of medium sand; 850-860 parts of a crushed stone raw material; 9-11 parts of a water reducing agent; 140 to 145 parts ofwater; 3-6 parts of magnesium fluosilicate; and 12-18 parts of a filling reinforcing material. The high-strength self-compacting concrete provided by the invention has good and stable sulfate ion corrosion resistance, and is not easy to crack as a whole when being applied to regions with higher sulfate ion content.

Description

technical field [0001] The invention relates to the technical field of concrete, more specifically, it relates to a high-strength self-compacting concrete and a preparation method thereof. Background technique [0002] High-performance concrete is considered to be the most comprehensive concrete in the world due to its excellent properties such as high durability, high workability, high strength and high volume stability. It has been used in many important projects so far, especially It shows its unique advantages in bridges, high-rise buildings, seaport buildings and other projects, and has produced obvious benefits in terms of project safety service life, economic rationality, and adaptability to environmental conditions. Therefore, it has been accepted by scholars from all over the world. It is considered to be the development direction of concrete technology in the future. [0003] A Chinese invention patent with the publication number CN110482958A discloses a high-stre...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/20
CPCC04B28/04C04B2111/2015C04B18/12C04B18/08C04B14/02C04B14/06C04B22/00C04B2103/302C04B14/328C04B14/324C04B14/42C04B14/4656
Inventor 朱可可朱亚楠
Owner 上海兆捷实业发展有限公司
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