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Corrosion-resistant concrete for high-chlorine bittern environment and its preparation and construction methods

A technology of corrosion-resistant concrete and concrete, applied in the field of civil engineering materials, to achieve the effects of easy operation, simple construction process and low material cost

Inactive Publication Date: 2013-09-25
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the durability problem of the structure concrete in the high-chloride brine environment, the invention provides a corrosion-resistant concrete used in the high-chloride brine environment and its production and construction process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The north-south width of the construction in a saline soil area is about 480m, and the east-west length is about 750m, covering an area of ​​about 360000m 2 According to the engineering survey report, the salt content of saline soil in this area is 26.642%, and the main ion content is: Ca 2+ : 0.27%, Mg 2+ : 1.88%, K + and Na + : 10.5%, SO 4 2- : 1.01%, Cl - : 12.97%, HCO 3 - : 0.01%, CO 3 2- : 0.002%. The salinity of the brine to be stored in the brine pool is 527.15g / L, and the salinity of the main ions is (g / L): K + and Na + : 151.35, Ca 2+ : 23.32, Mg 2+ : 48.72, Cl - : 286.43, SO 4 2- : 17.08, HCO 3 - : 0.15, CO 3 2- : 0.1. According to the salinity of the saline soil, the salinity of the brine to be stored in the brine pool, and the type and concentration of the salt in the saline soil and brine, the concrete is prepared in parts by weight of the following raw materials:

[0034] Lightly burned magnesia powder: 800 parts; magnesium chloride: ...

Embodiment 2

[0038] A certain saline soil area builds a brine canal, wherein part of the brine canal section utilizes the concrete construction of the present invention, and according to the engineering survey report, it is known that the salt content of the saline soil in this area is: 44%, and the content of the main ion is: Ca 2+ : 1.39%, Mg 2+ : 1.88%, K + and Na + : 14.5%, SO 4 2- : 4.2%, Cl - : 21.97%, HCO 3 - : 0.05%, CO 3 2- : 0.01%. The salinity of the brine in the brine channel is: 367.94g / L, and the salinity of the main ion is (g / L): K + and Na + : 138.62, Ca 2+ : 12.4, Mg 2+ : 25.33, Cl - : 179.17, SO 4 2- : 12.36, HCO 3 - : 0.04, CO 3 2- : 0.02. According to the composition and concentration of ions in saline soil and the salinity of main ions in brine, concrete is prepared according to the weight parts of the following raw materials:

[0039] Lightly burned magnesia powder: 550 parts; Magnesium chloride: 120 parts; Coarse aggregate: 650 parts; Fine aggreg...

Embodiment 3

[0043] In a saline soil area, reinforced concrete piles are used to enhance the bearing capacity of the foundation. The designed pile length is 15m, pile diameter is 100cm, and the stable water level depth is 2m. According to the engineering investigation report, it is known that the salt content of the saline soil in this area is: 15%, and the main ion content is: Ca 2+ : 0.98%, Mg 2+ : 0.17%, K + and Na + : 5.13%, SO 4 2- : 1.04%, Cl - : 7.65%, HCO 3 - : 0.02%, CO 3 2- : 0.01%. The salinity of underground brine is: 272.46g / L, and the salinity of the main ion is (g / L): K + and Na + : 97.15, Ca 2+ : 12.53, Mg 2+ : 18.37, Cl - : 125.31, SO 4 2- : 18.92, HCO 3 - : 0.1, CO 3 2- : 0.08. According to the composition and concentration of ions in saline soil and the salinity of main ions in brine, concrete is prepared according to the weight parts of the following raw materials:

[0044] Lightly burned magnesia powder: 300 parts; magnesium chloride: 60 parts; co...

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Abstract

The invention discloses corrosion-resistant concrete for a high-chlorine bittern environment and its preparation and construction methods. Raw materials of the corrosion-resistant concrete comprise light calcined magnesia, magnesium chloride, water, aggregate, a mineral-doped material and an additive. Through interaction of all components of the corrosion-resistant concrete, and ghloride saline soil or bittern comprising specific types of salts and having specific concentrations, the corrosion-resistant concrete can coagulate and harden, form and keep strength under damp conditions of specific salt types and concentrations, or in super-ghloride saline soil and strong-ghloride saline soil below an underground water level, or in a bittern environment (high-chlorine bittern environment). The corrosion-resistant concrete can be used in a high-chlorine bittern environment, and satisfy building and member concrete strength and endurance requirements.

Description

technical field [0001] The invention belongs to the field of civil engineering materials, in particular to a corrosion-resistant concrete used in a high-chloride brine environment and its production and construction technology. Background technique [0002] The area of ​​my country's salt lake belt is about 250,000 square kilometers, mainly concentrated in the salt lake area of ​​Xinjiang, the salt lake area of ​​Tibet, the salt lake area of ​​Qinghai and the salt lake area of ​​Inner Mongolia. The flood period density of Chaerhan Salt Lake in Qinghai is 1.361, and the salinity is 527.15g / L. The salt content of the saline soil area around the salt lake can be as high as 44%. [0003] With the progress of my country's western development, more and more structures need to be built on saline soil, and a considerable number of structures or components need to be used in high-chloride brine environments, such as: cross-salt lake transmission tower poles in power transmission proj...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/32
Inventor 刘庆伟李建猛程寅杨建伟黄新
Owner BEIHANG UNIV
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