Concrete capable of resisting concentrated seawater and desulfurization flue gas corrosion

A technology for concentrating seawater and concrete, applied in the field of concrete, can solve the problems of corrosion of reinforced concrete and affect the durability of concrete, and achieve the effects of high water reduction rate, easy construction and operation, and improved labor efficiency.

Active Publication Date: 2014-11-19
POWERCHINA HEBEI ELECTRIC POWER SURVEY & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, chloride ions in concrete will also cause corrosion to the surface of reinforced concrete, affecting the durability of concrete

Method used

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  • Concrete capable of resisting concentrated seawater and desulfurization flue gas corrosion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Concrete resistant to concentrated seawater and desulfurized flue gas corrosion, including gravel, sand, gelling materials, admixtures and water.

[0027] The crushed stone used in the preparation of concrete is continuously graded crushed stone with a particle size of 5 mm to 25 mm, and the bulk density of the crushed stone is > 1450 kg / m 3 , porosity ≤ 42%, water absorption ≤ 2%, crushing index ≤ 12%, mud content ≤ 1.5%, chloride ion content ≤ 0.01%.

[0028] The sand used to prepare concrete is river sand, the fineness modulus of the sand is 2.4-3.0, the mud content is ≤2%, the chloride ion content is ≤0.01%, and the accumulated sieve residue of the 4.75mm sieve is controlled to be 0-5%. The cumulative sieve allowance of 0.6mm sieve is 40%~70%, and the cumulative sieve allowance of 0.15mm sieve is more than 95%.

[0029] The cementitious material is composed of cement, mineral powder and fly ash. The cement used is Portland cement with a strength grade of not less ...

Embodiment 2～15

[0033] The formula of embodiment 2~15 and the concrete performance that make are as shown in the table below:

[0034]

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Abstract

The invention discloses concrete capable of resisting concentrated seawater and desulfurization flue gas corrosion. The concrete consists of gravel, sand, a gel material, an additive and water, wherein the gel material consists of the following components in percentage by weight: 23.6 to 25 percent of mineral powder, 23.6 to 25 percent coal ash and the balance of cement. The proportion of the coal ash, the mineral powder and the cement of the gel material of the concrete is controlled, and the alkali content and the chloridion content of the gel material are controlled strictly, so the requirements of an integrated smoke tower and seawater cooling tower on the strength and the corrosion resistance of the concrete are met, the necessary step of preparing a corrosion-resistant coating in the traditional technology is omitted, the labor efficiency can be improved, and the construction cost is reduced.

Description

technical field [0001] The invention relates to a concrete, in particular to a concrete corrosion-resistant to concentrated seawater and desulfurization flue gas. Background technique [0002] The seawater cooling tower is a kind of water cooling technology that uses seawater as the cooling medium. After completing the primary cooling in the heat exchange equipment, it is cooled by the cooling tower, and then continues to be recycled. Compared with the traditional seawater direct-flow water supply and freshwater circulation cooling system, the seawater cooling tower can save a lot of freshwater resources on the one hand, and on the other hand, it has less thermal pollution and chemical reagent pollution to the surrounding sea body, which is more conducive to protecting the marine ecological environment. With the increasing shortage of fresh water resources in coastal areas and the gradual improvement of environmental protection standards, seawater cooling towers are more and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
Inventor 王素芳赵晓利赵春晓朱艳琴
Owner POWERCHINA HEBEI ELECTRIC POWER SURVEY & DESIGN INST CO LTD
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