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Composite silt solidified material

A solidified material and composite technology, applied in the field of civil engineering materials, can solve the problems of occupying farmland or fishing ponds, polluting the environment of mud dumping points, etc., and achieve the effect of low price, good mixing effect and low price

Inactive Publication Date: 2003-10-15
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This disposal method will not only pollute the environment around the mud throwing point, but also occupy a large amount of farmland or fish ponds

Method used

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  • Composite silt solidified material
  • Composite silt solidified material
  • Composite silt solidified material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Each component of the present invention is mixed uniformly by following percentage by weight:

[0015] Cement 24.4%

[0016] Fly ash 73.2%

[0017] Gypsum 2.4%

[0018] According to this ratio, add 90kg of solidified material to each cubic meter of sludge, the unconfined compressive strength of solidified sludge can reach 110kPa in 7 days, and the unconfined compressive strength in 28 days can reach 170kPa. The permeability coefficient of solidified silt is less than 10 -5 cm / s. Compared with using cement as a material, the cost can be saved by 21% to achieve the same curing effect. Moreover, this material itself has good rapid hardening (the strength can reach 110kPa in 7 days), and other projects can be constructed on it soon after construction.

Embodiment 2

[0020] Each component of the present invention is mixed uniformly by following percentage by weight:

[0021] Cement 17.5%

[0022] Fly ash 79.0%

[0023] Gypsum 3.5%

[0024] Using this ratio, add 100kg of solidified material to each square of sludge, the unconfined compressive strength of the solidified sludge can reach 100kPa in 7 days, and the unconfined compressive strength in 28 days can reach 150kPa. The permeability coefficient of solidified silt is less than 10 -5 cm / s. Compared with using cement as a material, the cost can be saved by 18% to achieve the same curing effect. Solidification reaction equation (1)~(7) of composite sludge solidification material: Hydrolysis reaction formula (1)~(4): (1) (2) (3) (4) Hydration reaction (5)~(7): (5) ...

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Abstract

The present invention is one kind of composite sludge curing material for curing sludge produced in water engineering and civil engineering. It is cement-based curing material with certain amount offlyash as industrial waste and gypsum added. Through mixing with sludge, it is possible to improve the property of sludge, which has hydroxide water content and low strength, and reusing waste sludge with likely environmental pollution as engineering material. The utilization of industrial waste results in low cost.

Description

technical field [0001] The invention relates to a composite curing material used for solidifying sludge generated in water conservancy projects and civil engineering. The solidified sludge can be used as filling soil for earthworks such as roads and embankments. It belongs to the technical field of civil construction materials. Background technique [0002] In many water conservancy projects and civil engineering projects such as ocean, lake, river dredging or urban subway construction, foundation pit excavation and other projects, a large amount of silt will be produced. These silts have high moisture content, high clay content, and extremely low strength. It is directly used as engineering fill and is usually disposed of by throwing mud. This disposal method will not only pollute the environment around the mud throwing point, but also occupy a large amount of farmland or fish ponds. In many earthwork projects such as reclamation projects, embankment projects, and road pr...

Claims

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Application Information

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IPC IPC(8): B09B3/00C04B18/04C04B18/08C04B28/14
CPCC04B28/02Y02W30/91C04B18/0418C04B18/08C04B22/143
Inventor 朱伟张春雷范昭平李磊
Owner HOHAI UNIV
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