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Salt mud curing material as well as preparation method and application thereof

A technology for solidifying materials and salt mud, applied in the field of salt mud solidifying materials and their preparation, can solve problems such as shortage, damage to chemical corrosion resistance, and easy corrosion.

Active Publication Date: 2022-04-29
北京润鸣环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Chloride ions in concrete will combine with calcium during concrete hydration to form calcium chloride, which is a powdery compound with no strength. The cured concrete contains Calcium chloride without bonding strength, chloride ions will also destroy the chemical corrosion resistance of the concrete itself, so it will greatly reduce the strength of the concrete, resulting in local looseness and insufficient bearing capacity in the entire building Therefore, when the content of chloride ions in the concrete is high, the concrete will be in a state of low strength and easy to corrode, which will lead to the destruction of the concrete building structure and the appearance of concrete In the case of stripping, the use of building components will deviate from the original design standards, which has a very direct negative impact on the structure of the entire building

Method used

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  • Salt mud curing material as well as preparation method and application thereof
  • Salt mud curing material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] For the returned salt mud after crude salt refining in a coastal salt field in North China, the moisture content after air drying is about 5%. Using 94 parts of the above-mentioned salt mud, add 3 parts of sand and stones with a particle size less than 3mm and 5 parts of aluminate cement, stir for 1 min, and mix well to obtain a mixture; take 0.02% of the total mass of the mixture and reduce Water agent, diluted 30 times with water, added to the mixture, stirred evenly, formed by ordinary rolling, added water every 12 hours for curing, a total of 7 days of curing, to obtain a rectangular brick structure with a length of 24cm, a width of 11.5cm, and a height of 5.6cm body. Then unconfined compressive strength, continuous seawater immersion, compactness, ion leaching test and immersion resistance test were carried out.

Embodiment 2

[0041] The difference from Example 1 is that a 200-ton brick making machine is used for compression molding.

Embodiment 3

[0045] Unconfined compressive strength, continuous seawater immersion and compactness test results:

[0046] For the bricks of Example 1, the 7-day unconfined compressive strength is 2.8 MPa; for the bricks of Example 2, the 7-day unconfined compressive strength is 18.2 MPa, and the 28-day strength reaches 27 MPa. The compactness of the bricks in Example 1 and Example 2 is 95%. After 7 days of continuous seawater immersion test, there is no any collapse on the surface, and it is still relatively smooth and smooth.

[0047] Anti-immersion performance test results:

[0048] The bricks prepared in Example 2 were soaked continuously in water for 30 days, wherein the ratio of the mass of bricks to the volume of water was 1kg:10L. The results show that there is no corrosion, collapse and holes on the surface of the bricks, and the corners are relatively hard without collapse.

[0049] Ion leaching experiment results:

[0050] According to "HJ 557-2010", the bricks obtained in Exa...

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Abstract

The invention belongs to the field of salty mud curing, and particularly relates to a salty mud curing material as well as a preparation method and application thereof. The salty mud curing material provided by the invention is prepared from salty mud, solid particles, aluminum-containing mineral clinker and a water reducing agent. According to the invention, a large amount of salty mud solid waste can be consumed, effective adsorption and fixation of chloride ions are controlled by combining inherent components in the salty mud and skillfully utilizing the theory of nascent hydrotalcite, the precipitation of the chloride ions is controlled, and high strength and high surface performance of the curing material are realized; therefore, the method is applied to construction of a salt pan slope protection and a salt pan road, and the actual requirements of field pressure resistance, sun resistance, impact resistance and the like can be met.

Description

technical field [0001] The invention relates to the field of salt mud solidification, in particular to a salt mud solidification material and its preparation method and application. Background technique [0002] Since the rapid development of salt chemical industry in my country in the 1950s, salt mud, as a by-product of the salt industry, belongs to solid waste. About 1 ton of salt mud is produced for every 20 tons of raw salt produced. In 2015, the output of salt mud in my country was about 750,000 tons. At present, the annual production of salt mud in the country has reached several million tons. Salt mud contains a large amount of sodium chloride and calcium magnesium silicon components. It is dehydrated by means of plate and frame filter press, and the moisture content is about 50%. There is no way to use it. A large amount of salt mud waste is piled up in the salt factory without any treatment or directly transported to the suburbs for accumulation. Its high salt con...

Claims

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Application Information

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IPC IPC(8): C04B28/06
CPCC04B28/06C04B2111/0075C04B2111/00775C04B2111/00017C04B2201/50C04B14/06C04B18/0481C04B24/16Y02W30/91
Inventor 张丽王志新
Owner 北京润鸣环境科技有限公司
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