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Concrete material with high resistance to stray current, chloride ions and carbonization

A stray current and concrete technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as corrosion of steel bars in concrete structures, increase production costs, carbonation and corrosion of engineering structures, and achieve material costs Reduced effect

Inactive Publication Date: 2013-03-06
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the increasing traffic pressure in large and medium-sized cities in our country, fast and environmentally friendly rail transit has increasingly become one of the most ideal means of transportation in cities, but it faces the following problems: 1. Stray currents often leak when running on the rails, which has a negative impact on the interior of the concrete structure. The steel bars produce serious corrosion; 2. The main structure of the project is generally deep from the surface, and it is also severely corroded by chloride ions; 3. The carbon dioxide content in the underground environment is high, and the carbonation corrosion of the engineering structure is serious
Patent application number 200810046967.8, the invention patent named a high-resistance and high-impermeability concrete material and its preparation method proposes to add insulating polymer on the basis of single-doped mineral admixture, because of the insulation of the polymer, indirectly improve The resistivity of concrete is improved, but this will greatly increase the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take the following components according to the amount of concrete per cubic meter: 152 kg of cement, 76 kg of fly ash, 152 kg of mineral powder, 2.3 kg of mica powder, 781 kg of fine aggregate, 1079 kg of coarse aggregate, 4.175 kg of admixture, 160 kg of water. The cement is Jinningyang brand PⅡ42.5R Portland cement; the fly ash is grade II fly ash; the mineral powder is S95 grade finely ground mineral powder; the mica powder is 500 mesh muscovite powder; River sand with a count of 2.6; the coarse aggregate is continuous graded crushed stone with a particle size of 5-40 mm; the admixture is JM-PCA (I) type high-performance water reducer.

[0016] Mix fine aggregate and coarse aggregate together for 1 to 2 minutes, then add cement, fly ash, mineral powder and muscovite powder, continue stirring for 1 to 2 minutes, then add admixture and water, and continue stirring for 2 to 5 minutes. Minutes, resulting in a concrete that is highly resistant to stray currents, chloride...

Embodiment 2

[0019] Take the following components according to the amount of concrete per cubic meter: 120 kg of cement, 90 kg of fly ash, 180 kg of mineral powder, 4.0 kg of mica powder, 770 kg of fine aggregate, 1090 kg of coarse aggregate, 3.9 kg of admixture, and 170 kg of water kg.

[0020] The cement is Jinningyang brand PI42.5 Portland cement; the fly ash is Class I fly ash; the mineral powder is S105 grade finely ground mineral powder; the mica powder is 1000 mesh muscovite powder; River sand with a count of 2.7; the coarse aggregate is continuous graded crushed stone with a particle size of 5-40 mm; the admixture is JM-PCA (I) type high-performance water reducer. The preparation method is the same as in Example 1.

[0021] In this embodiment, the amount of cement used is 30% of the total amount of cementitious materials, 70% of the total amount of mineral powder and coal ash powder cementitious materials, and the prepared concrete with high resistance to stray current, chloride i...

Embodiment 3

[0023] Take the following components according to the amount of concrete per cubic meter: 200 kg of cement, 70 kg of fly ash, 120 kg of mineral powder, 1.2 kg of mica powder, 790 kg of fine aggregate, 1060 kg of coarse aggregate, 4.4 kg of admixture, water 150 kg.

[0024] The cement is Jinningyang brand PⅡ42.5R Portland cement; the fly ash is grade II fly ash; the mineral powder is S105 grade finely ground mineral powder; the mica powder is 325 mesh muscovite powder; River sand with a count of 2.4; the coarse aggregate is continuous graded crushed stone with a particle size of 5-40 mm; the admixture is HLC-IX high-performance water reducer. The preparation method is the same as in Example 1.

[0025] In this embodiment, the amount of cement used is 50% of the total amount of cementitious materials, 50% of the total amount of mineral powder and coal ash powder cementitious materials, and the prepared concrete with high resistance to stray current, chloride ions and carbonatio...

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Abstract

The invention relates to a concrete material with high resistance to stray current, chloride ions and carbonization. The concrete material is characterized by comprising the following components in each cubic meter of concrete: 120 to 200kg of cement, 60 to 90kg of fly ash, 120 to 180kg of mineral powder, 1.2 to 4.0kg of mica powder, 740 to 820kg of fine aggregate, 1,040 to 1,120kg of coarse aggregate, 3.9 to 4.5kg of additive and 140 to 180kg of water. A preparation method comprises the following steps of: mixing and stirring the fine aggregate and the coarse aggregate uniformly; adding the cement, the fly ash, the mineral powder and the mica powder, and stirring uniformly; and adding the additive and the water, and stirring uniformly to obtain the concrete material with high resistance to stray current, chloride ion corrosion and carbonization. The production cost is low.

Description

technical field [0001] The invention belongs to the technical field of civil engineering materials, in particular to a concrete material highly resistant to stray current, chloride ions and carbonization. Background technique [0002] With the increasing traffic pressure in large and medium-sized cities in our country, fast and environmentally friendly rail transit has increasingly become one of the most ideal means of transportation in cities, but it faces the following problems: 1. Stray currents often leak when running on the rails, which has a negative impact on the interior of the concrete structure. The steel bars produce serious corrosion; 2. The main structure of the project is generally deep from the surface, and it is also severely corroded by chloride ions; 3. The carbon dioxide content in the underground environment is high, and the carbonization corrosion of the engineering structure is serious. In short, the concrete structure of the rail transit project is in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04Y02W30/91C04B14/02C04B14/20C04B18/08C04B18/12C04B20/0076C04B20/0096C04B24/2641C04B14/06C04B2103/302
Inventor 蒋林华朱乔徐金霞蒋俣储洪强张研徐怡濮琦杨虎宋子健
Owner HOHAI UNIV