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High-strength concrete as well as preparation method and application thereof

A concrete and high-strength technology, applied in the field of concrete, can solve problems such as difficulty in meeting construction requirements, and achieve the effects of not being easy to crack, improving durability, and increasing compressive strength

Inactive Publication Date: 2019-11-22
广州铁诚工程质量检测有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the compressive strength of existing ordinary concrete can only reach about 30-40MPa, and it is difficult to meet the construction requirements in some bridges and other high-strength engineering constructions. Therefore, there is still room for improvement.

Method used

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  • High-strength concrete as well as preparation method and application thereof
  • High-strength concrete as well as preparation method and application thereof
  • High-strength concrete as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] A high-strength concrete comprising the following components:

[0072] Portland cement 7kg; water 10kg; river sand 55kg; fly ash 10kg; silica fume 5kg; mineral powder 6.5kg; quartz powder 5kg; steel fiber 8kg.

[0073] In this embodiment, the particle size of the river sand is 0.075-1.18mm.

[0074] The preparation method of high-strength concrete is as follows:

[0075] S1. Add 7kg of Portland cement to a 150L stirring tank. Stir at a speed of 260r / min at room temperature. Add 10kg of water while stirring. After stirring evenly, add 55kg of river sand and fly ash while stirring. 10kg, silica fume 5kg, mineral powder 6.5kg, quartz powder 5kg and steel fiber 8kg, stir evenly to form concrete slurry;

[0076] S2. Let the concrete slurry prepared in S1 stand at room temperature for 24 hours, then cover the concrete slurry with a plastic film, and pour water on the plastic film for curing. The curing temperature is controlled at 30°C, and the curing time is controlled at ...

Embodiment 2

[0079] The difference with embodiment 1 is:

[0080] In step S2, the standing time of the concrete slurry at room temperature is controlled to be 36 hours, the curing temperature is controlled to be 33° C., and the curing time is controlled to be 29 days.

[0081] In step S3, the concrete intermediate is cured in steam at 88° C. for 60 hours.

Embodiment 3

[0083] The difference with embodiment 1 is:

[0084] In step S2, the standing time of the concrete slurry at room temperature is controlled to be 48 hours, the curing temperature is controlled to be 35° C., and the curing time is controlled to be 28 days.

[0085] In step S3, the concrete intermediate is cured in steam at 90° C. for 48 hours.

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Abstract

The invention discloses high-strength concrete as well as a preparation method and application thereof. The high-strength concrete comprises the following components in parts by mass: 7-15 parts of Portland cement; 5-10 parts of water; 50 to 60 parts of river sand the particle size of which is 0.075 to 4.75 mm; 10 to 15 parts of fly ash; 3-5 parts of silica fume; 5-8 parts of mineral powder; 2-5 parts of quartz powder; and 4-8 parts of steel fibers. The preparation method comprises the following steps: S1, adding the components of the high-strength concrete into a reaction container, and uniformly stirring to form concrete slurry; S2, standing the concrete slurry prepared in the step S1 for 24-48 hours at room temperature, and then curing and molding the slurry to form a concrete intermediate; S3, curing the concrete intermediate prepared in the step S2 in steam at 85-90 DEG C for 48-72 hours, so as to obtain the high-strength concrete. The high-strength concrete can be used for manufacturing prefabricated segment components of bridges and has the advantage that the strength of the high-strength concrete can meet the construction requirements of high-strength engineering construction more easily.

Description

technical field [0001] The invention relates to the field of concrete, more specifically, it relates to a high-strength concrete and its preparation method and application. Background technique [0002] Concrete has good working performance, mechanical properties and durability, and has a wide range of raw materials, low cost, and simple production process. It has become the most widely used building material in modern construction projects. [0003] However, the compressive strength of existing ordinary concrete can only reach about 30-40 MPa, which is difficult to meet the construction requirements in some bridges and other high-strength engineering constructions. Therefore, there is still room for improvement. Contents of the invention [0004] In view of the deficiencies in the prior art, the first object of the present invention is to provide a high-strength concrete, which has the advantage of increasing the compressive strength of the high-strength concrete. [000...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B2201/52C04B14/06C04B18/08C04B18/146C04B18/141C04B14/48C04B18/24C04B24/04C04B24/38
Inventor 李杰
Owner 广州铁诚工程质量检测有限公司