Composite curing agent for dredged silt in watercourse

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...

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

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