Sullage solidifying method

Abstract

A sludge solidification method is a method for carrying out solidification treatment to the sludge produced in water conservancy projects and civil engineering. The method is that: a. the liquid water content, the clay content and organic content of dredging sludge are tested. b. curing agent is prepared: the curing agent mainly contains cement and calcium oxide which play the function of solidification; wherein, the weight proportion is between 1 : 1 to 4 : 1; waste gypsum is used as water reducing agent which occupies 1 to 8 percent of the sum of cement and calcium oxide in proportion; mealy sand or pulverized fuel ash are used as concrete aggregate which occupies 3 to 5 percent of the sum of the cement and calcium oxide in proportion; c. the curing agent-mixing ratio which is usually controlled from 5 to 20 percent is determined; sampling respectively is carried out, setting time is tested and the unconfined compressive strength which maintains 7, 14 and 28 days is tested by sampling, and the curing agent-mixing ratio finally is determined according to optimal performance price ratio; d. the sludge is carried out curing and constructing in site; mechanical devices are used for stirring the curing agent and the sludge rapidly and evenly, thereby leading the solidification to be rapid and full.

Description

technical field [0001] The invention relates to a silt solidification method for embankment filling soil used in road engineering, and belongs to the technical field of solidification treatment of silt produced in water conservancy engineering and civil engineering. Background technique [0002] In the construction of expressways, it is often necessary to requisition a large amount of farmland and use high-quality clay for embankment filling, which forms a pair of contradictions with the shortage of land resources. At the same time, a large amount of silt dredged from water conservancy channels needs to requisition a large area of ​​open space for stacking. Due to its poor physical and mechanical properties, the silt dredged from the river channel cannot be directly used for other purposes, and the land has been occupied for a long time. [0003] In the construction of highways and first- and second-level highways, a large amount of clay is used as embankment filling materia...

AI Technical Summary

Problems solved by technology

In addition, in the eastern area where the river network is dense, due to the siltation of the river channel, the river bed is platformed, and the navigability is affected. It is often necessary to dredge the channel. After dredging, a large amount of silt can only be discarded due to poor physical and mechanical properties, and a large area of ​​open space needs to be found for stacking. , which not only encroached on farmland, but also had adverse effects on the environment