Device and method for detecting corrosion of inorganic cementing material in flowing karst water

A technology for inorganic cementitious materials and corrosion detection, which is applied in the directions of measuring devices, analysis materials, weather resistance/light resistance/corrosion resistance, etc., and can solve problems such as the inability to evaluate the chemical corrosion of cement concrete and alkali-induced concrete structures

Pending Publication Date: 2021-10-22
南宁师范大学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corrosion problem of flowing karst water, the pH value of karst water remains unchanged, mainly H + and HCO 3 - Coupling corrosion of hydration products, therefore, traditional cement concrete carbonation detection devices cannot evaluate the chemical corrosion of cement concrete and alkali-activated concrete structures in karst environments

Method used

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  • Device and method for detecting corrosion of inorganic cementing material in flowing karst water
  • Device and method for detecting corrosion of inorganic cementing material in flowing karst water
  • Device and method for detecting corrosion of inorganic cementing material in flowing karst water

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Effect test

Embodiment 1

[0051] A method for detecting corrosion of inorganic gelling materials in flowing karst water, using the above-mentioned corrosion detection device to evaluate the corrosion of inorganic gelling materials in flowing karst water, comprising the following steps:

[0052] S1, adding sodium bicarbonate to water to prepare a sodium bicarbonate solution with a mass concentration of 5%;

[0053] S2. Prepare the inorganic gelling material and place it in the second box;

[0054] S3. Add the sodium bicarbonate solution with a mass concentration of 5% into the first box through the feeding port, start the water pump, and pump the sodium bicarbonate solution into the second box through the water injection pipe, so that the sodium bicarbonate solution flows through the inorganic The cementitious material is corroded for 60 days, and the drain is opened, so that the sodium bicarbonate solution flows through the inorganic cementitious material and then flows out from the drain;

[0055] S4...

Embodiment 2

[0061] A method for detecting corrosion of inorganic gelling materials in flowing karst water, using the above-mentioned corrosion detection device to evaluate the corrosion of inorganic gelling materials in flowing karst water, comprising the following steps:

[0062] S1. Prepare karst water, wherein, Ca in karst water 2+ The mass concentration is 75~80mg / L, HCO 3 - The mass concentration is 205~215mg / L, SO 4 2- The mass concentration is 5~10mg / L, Cl - The mass concentration is 4~5mg / L;

[0063] S2. Prepare the inorganic gelling material and place it in the second box;

[0064] S3. Add karst water into the first box through the feeding port, start the water pump, pump the karst water into the second box through the water injection pipe, let the karst water flow through the inorganic cementitious material to corrode for 360d, and open the drain, Make the karst water flow through the inorganic cementitious material and then flow out from the drain;

[0065] S4. After the...

Embodiment 3

[0070] A method for detecting corrosion of inorganic gelling materials in flowing karst water, using the above-mentioned corrosion detection device to evaluate the corrosion of inorganic gelling materials in flowing karst water, comprising the following steps:

[0071] S1, adding sodium bicarbonate to water to prepare a sodium bicarbonate solution with a mass concentration of 1%;

[0072] S2. Prepare the inorganic gelling material and place it in the second box;

[0073] S3. Add the sodium bicarbonate solution with a mass concentration of 1% into the first box through the feeding port, start the water pump, and pump the sodium bicarbonate solution into the second box through the water injection pipe, so that the sodium bicarbonate solution flows through the inorganic The cementitious material is corroded for 56 days, and the drain is opened to allow the sodium bicarbonate solution to flow through the inorganic cementitious material and then flow out from the drain;

[0074] S...

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Abstract

The invention provides a device and method for detecting corrosion of an inorganic cementing material in flowing karst water, and the device comprises a first box body which is provided with a liquid feeding port and a liquid discharging port; a second box body, wherein a water outlet is formed in the bottom of the second box body; a water injection pipe one end of which extends into the second box body, the other end of which extends into the first box body, and the other end of which communicates with a water pump located in the first box body; a pH meter a probe of which extends into the first box body. According to the device for detecting the corrosion of the inorganic cementing material in the flowing karst water, the flowing karst water or a flowing sodium bicarbonate solution is used for corroding the inorganic cementing material under normal pressure, the service environment is consistent with the service environment of a karst cave in a karst area or a cement concrete pile foundation in an underground river, and the corrosion condition of the karst water to the inorganic cementing material can be accurately simulated.

Description

technical field [0001] The invention relates to the technical field of civil engineering materials, in particular to a corrosion detection device and detection method for inorganic gelling materials in flowing karst water. Background technique [0002] Karst is a special geological structure formed by water chemical erosion, mechanical erosion and collapse of soluble carbonate rocks, accompanied by material migration and re-precipitation. According to the distribution area of ​​strata containing soluble rocks, the karst areas in my country can reach 3.444 million square kilometers, accounting for more than one-third of the country's land area. Among them, Guangxi, Yunnan, Guizhou and other regions have wide distribution of karst and the most karst caves. During the construction process, serious safety accidents such as water inrush, mud gushing, foundation sliding and subsidence of karst tunnels occurred from time to time. In the process of operation, problems such as erosi...

Claims

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Application Information

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IPC IPC(8): G01N17/00
CPCG01N17/00
Inventor 刘乐平刘海南姚宏高泽朝
Owner 南宁师范大学
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