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Grouting material for impervious curtain of refuse landfill and preparation method of grouting material

A technology for landfills and grouting materials, which is applied in sustainable waste treatment, solid waste management, climate sustainability, etc. The effect of good permeability and large specific surface area

Inactive Publication Date: 2012-06-20
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fly ash produced by the incineration method is a double-material hazardous waste with both heavy metal hazard characteristics and environmental persistent organic toxicity hazard characteristics, which is extremely harmful to human health and the ecological environment. Therefore, the disposal of waste incineration fly ash It has always been a major environmental problem facing the world and a major bottleneck in the development of waste incineration technology.

Method used

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  • Grouting material for impervious curtain of refuse landfill and preparation method of grouting material
  • Grouting material for impervious curtain of refuse landfill and preparation method of grouting material
  • Grouting material for impervious curtain of refuse landfill and preparation method of grouting material

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preparation example Construction

[0021] The preparation method of the grouting material for the anti-seepage curtain of the landfill site, the preparation of the grouting material is carried out according to the following steps:

[0022] a Weigh each raw material according to mass percentage: waste incineration fly ash 40-50%, organic sulfur 0.5-1%, cement 3-6%, water 45-55%, calcium hydroxide 1.5-2%.

[0023] b Mix 40-50% of waste incineration fly ash, 0.5-1% organic sulfur and 45-55% water weighed above and stir for 5-10 minutes. Heavy metal ions (mercury, lead, copper, cadmium, nickel, manganese, zinc, chromium, etc.) react quickly to form chelates that are insoluble in water and have good chemical stability. The mobility is effectively controlled, and the detoxified garbage incineration fly ash slurry is obtained.

[0024] c. Mix the 3-6% cement and 1.5-2% calcium hydroxide weighed above into the waste incineration fly ash slurry obtained in step b, and stir for 3-5 minutes. The stirring is carried out i...

Embodiment 1

[0026] In this embodiment, 500g of waste incineration fly ash is weighed, the average particle diameter of the fly ash is 78 μm and Al 2 o 3 +SiO2 2 The content is 28%, organic sulfur 5.5g, deionized water 500g, 32.5# ordinary Portland cement 50g and calcium hydroxide 20g, first mix the waste incineration fly ash, organic sulfur and deionized water in a strong mixer and stir evenly 5 minutes to obtain the detoxified waste incineration fly ash slurry, then mix cement and calcium hydroxide into it and stir again for 3 minutes to obtain the grouting material for the anti-seepage curtain of the landfill, and then use the consistency meter method to measure the initial setting of the slurry Time and final coagulation time, the viscosity was tested by the viscometer method, the calculus rate was tested by the titration method, and the water separation rate was measured by the graduated cylinder method. The test piece is formed by a 40mm×40mm×160mm test mold, demoulded after pourin...

Embodiment 2

[0030] In this embodiment, 500g of waste incineration fly ash is weighed, the average particle diameter of the fly ash is 48 μm and Al 2 o 3 +SiO2 2 The content is 64%, organic sulfur 10.0g, deionized water 600g, fly ash Portland cement 60g and calcium hydroxide 25g, first mix the waste incineration fly ash, organic sulfur and deionized water in a strong mixer and stir evenly 8 minutes to obtain the detoxified waste incineration fly ash slurry, then mix cement and calcium hydroxide into it and stir again for 5 minutes to obtain the grouting material for the anti-seepage curtain of the landfill, and then use the consistency meter method to measure the initial setting of the slurry Time and final coagulation time, the viscosity was tested by the viscometer method, the calculus rate was tested by the titration method, and the water separation rate was measured by the graduated cylinder method. The test piece is formed by a 40mm×40mm×160mm test mold, demoulded after pouring for...

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Abstract

The invention relates to a grouting material for an impervious curtain of a refuse landfill and a preparation method of the grouting material. The grouting material comprises the following components in percentage by mass: 40 to 50 percent of MSWI (Municipal Solid Waste Incineration) fly ash, 0.5 to 1 percent of organic sulfur, 3 to 6 percent of cement, 45 to 55 percent of water, and 1.5 to 2 percent of calcium hydroxide. The method for preparing the grouting material comprises the following steps of: (1) weighing raw materials; (2) mixing the MSWI fly ash, the water and the organic sulfur, and uniformly stirring for 5 to 10 minutes; and (3) interfusing the cement and the calcium hydroxide, and uniformly stirring for 3 to 5 minutes. According to the grouting material, the problems of material selection difficulty, high cost, poor fluidity, low stability and poor impermeability of a conventional grouting material can be solved. The preparation method has the advantages of short processroute, simple operation, time saving and the like.

Description

technical field [0001] The invention relates to a grouting material used for an anti-seepage curtain in a landfill and a preparation method thereof. Background technique [0002] The development of grouting materials has a long history. In the early days, cement was used as the grouting material. In the late 19th century, the grouting developed into chemical grouting materials based on water glass grouting materials. After World War II, chemical grouting materials were developed by Feixun. Development, especially in recent years, the grouting materials based on organic polymer materials have developed rapidly. [0003] Although the cement slurry material is cheap, rich in sources, and has high stone strength, ordinary cement has large particles, general fluidity, poor stability, and weak resistance to long-term osmotic pressure. General chemical grouts are toxic and expensive, and the stone body strength is lower than that of cement grout materials. However, polymer materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/10
CPCY02W30/91
Inventor 李江山薛强刘磊胡竹云
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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