Composite curing agent for dredged silt in watercourse

A composite curing agent and river dredging technology, which is applied in the direction of sludge treatment, solid waste management, chemical instruments and methods, etc., can solve the problems of unsatisfactory treatment effect, large amount of curing agent added and uneconomical, etc., and achieve strength improvement and improvement Strength, effect of increasing content

Inactive Publication Date: 2011-05-18
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Dredged silt is different from ordinary soil, especially in the high content of organic matter and high moisture content. Traditional solidification materials used in soil treatment usually have unsatisfactory treatment effects or too much solidification agent when dealing with dredged silt. Uneconomical

Method used

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  • Composite curing agent for dredged silt in watercourse

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Grind No. 425 ordinary silicon cement, blast furnace slag, converter steel slag, slaked lime and calcium sulfate until the Blaine specific surface area is 400-600m 2 / kg, the ratio by weight is: 15 parts by weight of No. 425 ordinary silicon cement, 45 parts by weight of blast furnace slag, 20 parts by weight of converter steel slag, 10 parts by weight of slaked lime and 10 parts by weight of calcium sulfate. Mix the above materials evenly to obtain the powder of the river dredging silt composite solidifying agent in this embodiment.

[0026] Dissolve polyvinyl alcohol, polyacrylamide and melamine sulfonate formaldehyde condensate in water respectively to form a solution with a solid content of 10%, and then proportion by weight: 30 parts by weight of polyacrylamide solution, 60 parts by weight of polyvinyl alcohol solution part, 10 parts by weight of melamine sulfonate formaldehyde condensate solution. Mix the above-mentioned substances evenly to obtain the liquid age...

Embodiment 2

[0028] Grind No. 425 ordinary silicon cement, blast furnace slag, converter steel slag, slaked lime and sodium carbonate until the Blaine specific surface area is 400-600m 2 / kg, the ratio by weight is: 25 parts by weight of No. 425 ordinary silicon cement, 25 parts by weight of blast furnace slag, 20 parts by weight of converter steel slag, 20 parts by weight of slaked lime and 10 parts by weight of sodium carbonate. Mix the above materials evenly to obtain the powder of the river dredging silt composite solidifying agent in this embodiment.

[0029] Dissolve polyvinyl alcohol, polyacrylamide and melamine sulfonate formaldehyde condensate in water respectively to form a solution with a solid content of 10%, and then proportion by weight: 60 parts by weight of polyacrylamide solution, 30 parts by weight of polyvinyl alcohol solution part, 10 parts by weight of melamine sulfonate formaldehyde condensate solution. Mix the above-mentioned substances evenly to obtain the liquid a...

Embodiment 3

[0031] Grind No. 425 ordinary silicon cement, blast furnace slag, converter steel slag, hydrated lime and sodium sulfate until the Blaine specific surface area is 400-600m 2 / kg, the ratio by weight is: 20 parts by weight of No. 425 ordinary silicon cement, 30 parts by weight of blast furnace slag, 30 parts by weight of converter steel slag, 15 parts by weight of slaked lime and 5 parts by weight of sodium sulfate. Mix the above materials evenly to obtain the powder of the river dredging silt composite solidifying agent in this embodiment.

[0032]Dissolve polyvinyl alcohol, polyacrylamide and melamine sulfonate formaldehyde condensate in water respectively to form a solution with a solid content of 10%, and then the ratio by weight is: 40 parts by weight of polyacrylamide solution, 55 parts by weight of polyvinyl alcohol solution parts, 5 parts by weight of melamine sulfonate formaldehyde condensate solution. Mix the above-mentioned substances evenly to obtain the liquid age...

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Abstract

The invention discloses a composite curing agent for dredged silt in a watercourse, comprising a powdered agent and a liquid agent, wherein the powdered agent consists of the following components on the basis of 100 percent of the total mass fraction: 15-25 percent of cement, 45-65 percent of pozzolanic material, 10-20 percent of alkali activator and 5-10 percent of salt activator; and the liquid agent consists of the following components on the basis of 100 percent of the total mass fraction: 2-7 percent of polyvinyl alcohol, 2-7 percent of polyacrylamide, 0.5-1 percent of melamine sulfonate formaldehyde condensate and the balance of water. The dredged silt has high compressive strength after being solidified by the composite curing agent for the watercourse silt, and can meet the requirements of road construction.

Description

Technical field: [0001] The invention belongs to the field of municipal and environmental engineering, and in particular relates to a composite solidifying agent for river channel dredging silt. Background technique: [0002] There are many urban rivers in the economically developed areas of Jiangnan and South my country, and large-scale dredging and dredging projects are carried out every year, resulting in a large amount of silt. For example, in 2009, the dredging project of the Fenjiang River in Foshan City, Guangdong Province, had a total dredging volume of 830,000 cubic meters; another example was the urban river surge environmental improvement project carried out before the Guangzhou Asian Games, with a dredging volume of more than 5 million cubic meters. At present, the disposal methods of dredged silt are mainly sea throwing and landfilling. Throwing into the sea will cause secondary pollution; the land formed by landfill is soft and difficult to develop and utilize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B28/08C02F11/00
CPCC04B18/0436C04B28/18C04B40/0039Y02W30/91C04B7/02C04B18/08C04B18/141C04B18/142C04B22/062C04B22/064C04B22/10C04B22/143C04B22/147C04B24/223C04B24/2623C04B24/2652C04B2103/0088
Inventor 陈繁忠付广义余旭禄
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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