Calcium-magnesium-based composite material for dewatering and curing dredged sludge, and preparation method and application of composite material

A technology for dredging silt and composite materials, applied in infrastructure engineering, construction, soil protection, etc., can solve the problems of unutilization, high processing cost, and single type of proportion, so as to promote early strength improvement, promote water conversion, The effect of accelerating water evaporation
CN110218073AInactive Publication Date: 2019-09-10WUHAN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
WUHAN UNIV
Publication Date
2019-09-10
Estimated Expiration
Not applicable Β· inactive patent
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Abstract

The invention provides a calcium-magnesium-based composite material for dewatering and curing dredged sludge, and a preparation method and application of the composite material, and can effectively solve the problems that dredged sludge is high in water content, low in bearing capacity, low in compression resistance and shear strength, and the like, and the sludge has good physical and mechanicalproperties after treatment. The calcium-magnesium-based composite material for dewatering and curing dredged sludge comprises the following components based on dry powder: 0.25-1 wt% of a resin superabsorbent polymer (SAP), 6-12 wt% of cement, 6-15 wt% of dead burned MgO, 8-22 wt% of magnesium phosphate, 6-18 wt% of metakaolin, 6-15 wt% of active MgO, 10-25 wt% of magnesium chloride, 2-4 wt% of quicklime, 3-8 wt% of sodium silicate, 3-6 wt% of sodium hydroxide, 15-40 wt% of slag powder and 10-30 wt% of fly ash.
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Description

technical field

[0001] The invention belongs to the field of building materials, and in particular relates to a calcium-magnesium-based composite material for dehydration and solidification of dredged silt, a preparation method and application thereof.

[0002] technical background

[0003] During the dredging and dredging process of inland lakes, port roadways and river sediments in my country, a large amount of dredged silt with high water content (even as high as 200-300%) and a certain risk of polluting the surrounding environment will inevitably be produced. These silts usually have high clay content, high moisture content, low shear strength, poor bearing capacity, and emit a foul smell. They do not need to be stacked for a long time, not only occupying a large amount of cultivated land, polluting the land environment, but also difficult to be directly used as engineering fillers. Therefore, the problem of co-processing of dredged silt dehydration and solidification is ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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