Self-repairing high-durability concrete with impact wear resistance and preparation method thereof

A concrete and self-repairing technology, which is applied in the field of concrete, can solve problems such as failure to achieve the best use state, high water content of tuff raw ore, and ineffective use of stone powder, so as to achieve the effects of improving durability, improving durability, and increasing strength

Inactive Publication Date: 2020-06-19
FUJIAN DADI CONCRETE PILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water content of the tuff raw ore obtained from mining and crushing is too high, and it cannot be used optimally in industrial applications. In additio

Method used

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  • Self-repairing high-durability concrete with impact wear resistance and preparation method thereof
  • Self-repairing high-durability concrete with impact wear resistance and preparation method thereof
  • Self-repairing high-durability concrete with impact wear resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] S1: Grinding and ball milling the kaolin after crushing. The grinding time is 1.5h, the grinding speed is 125r / min, the steel ball gradation used in the ball mill is: the number ratio of Ф20 steel balls, Ф10 steel balls and Ф6 Fu steel balls is 1:6:25, the steel balls and The mass ratio of kaolin is 5:1, and then sieved with a 70μm square hole sieve to make the specific surface area reach 20000cm 2 / g or more, and finally calcined in a high-temperature furnace for 1.5 hours to obtain metakaolin. The content of iron oxide in high iron sulfoaluminate cement is 9%; the fineness modulus of iron slag ball is 2.7; the fineness modulus of quartz sand is 2.7; agent.

[0050] S2: According to the ratio of raw materials in Table 2, the high-iron sulfoaluminate cement, silica fume, metakaolin, steel fiber, iron slag balls, and quartz sand in S1 were fully mixed and evenly prepared to prepare premix A;

[0051] S3: According to the ratio of raw materials in Table 2, add aliphati...

Embodiment 2

[0053] S1: Grinding and ball milling the kaolin after crushing. The grinding time is 1h, the grinding speed is 100r / min, the steel ball gradation used in the ball mill is: the number ratio of Ф20 steel balls, Ф10 steel balls and Ф6 Fu steel balls is 1:6:25, the steel balls and kaolin The mass ratio is 7:1, and then sieved with a 50μm square hole sieve to make the specific surface area reach 20000cm 2 / g or more, and finally calcined in a high-temperature furnace for 1 hour to obtain metakaolin. The content of iron oxide in high iron sulfoaluminate cement is 12%; the fineness modulus of iron slag balls is 2.9; the fineness modulus of quartz sand is 2.9; the water reducer is polycarboxylate high-efficiency water reducer.

[0054] S2: According to the ratio of raw materials in Table 2, the high-iron sulfoaluminate cement, silica fume, metakaolin, steel fiber, iron slag balls, and quartz sand in S1 were fully mixed and evenly prepared to prepare premix A;

[0055] S3: According ...

Embodiment 3

[0057] S1: Grinding and ball milling the kaolin after crushing. The grinding time is 2 hours, the grinding speed is 150r / min, the steel ball gradation used in the ball mill is: the number ratio of Ф20 steel balls, Ф10 steel balls and Ф6 Fu steel balls is 1:6:25, the steel balls and kaolin The mass ratio is 8:1, and then sieved with an 80μm square hole sieve to make the specific surface area reach 20000cm 2 / g or more, and finally calcined in a high-temperature furnace for 2 hours to obtain metakaolin. The content of iron oxide in high-iron sulfoaluminate cement is 15%; the fineness modulus of iron slag balls is 3.0; the fineness modulus of quartz sand is 3.0; the superplasticizer is naphthalenesulfonate superplasticizer.

[0058] S2: According to the ratio of raw materials in Table 2, the high-iron sulfoaluminate cement, silica fume, metakaolin, steel fiber, iron slag balls, and quartz sand in S1 were fully mixed and evenly prepared to prepare premix A;

[0059] S3: Accordin...

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Abstract

The invention discloses self-repairing high-durability concrete with impact wear resistance and a preparation method thereof. The concrete comprises the following components in parts by weight: 25-30parts of high-iron sulphoaluminate cement, 13-17 parts of silica fume, 4-5 parts of metakaolin, 2-3 parts of steel fibers, 16-20 parts of iron slag balls, 16-22 parts of quartz sand, 0.3-0.4 part of awater reducing agent and 5-10 parts of a self-repairing material, with the balance being water, wherein the self-repairing material comprises 6-8 parts of high-iron sulphoaluminate cement and 2-4 parts of diluted epoxy resin; and the self-repairing material further comprises 0.5-1 part of calcined tuff, 0.5-1 part of metakaolin and 0.5-1 part of carbon nanotubes. The concrete disclosed by the invention is high in strength and good in impact wear resistance, and can realize self-repairing when a wall body has a broken crack.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a concrete with high strength and good abrasion resistance, capable of self-repairing when cracks appear in the wall, and a preparation method thereof. Background technique [0002] Concrete, as the main building material, is widely used in civil engineering around the world and is in great demand. However, the deterioration of concrete performance has become more serious in recent decades. According to the requirements of different actual situations, concrete buildings should meet the service life of decades or even hundreds of years. However, in our country, due to the lack of durability of concrete, a considerable part of the engineering structures are prematurely damaged, and it is 10 to 20 years or even shorter. Time will require maintenance and renovation, which will bring huge economic losses. [0003] However, many aspects of common application examples also put forward...

Claims

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Application Information

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IPC IPC(8): C04B28/06
CPCC04B28/06C04B2201/50C04B2201/52C04B14/106C04B14/06C04B14/48C04B18/146C04B18/142C04B24/281C04B14/026C04B14/14C04B2103/302
Inventor 杨金辉杨晓彬董伟东
Owner FUJIAN DADI CONCRETE PILE
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