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Compound curing agent for dredged silt and preparation method thereof

A technology of compound solidifying agent and dredging sludge, applied in chemical instruments and methods, fixed/solidified sludge treatment, sludge treatment, etc. Good performance, good curing effect and economical effect, good early strength performance

Active Publication Date: 2017-10-03
余思哲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a composite curing agent for dredging silt and its preparation method, which solves the problems of the unsatisfactory reinforcement effect of the existing curing agent and the low strength of the added silt.

Method used

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  • Compound curing agent for dredged silt and preparation method thereof

Examples

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Embodiment 1

[0034] A composite curing agent for dredging silt, comprising the following components by weight: 20 parts of aluminum sulfate cement clinker, 30 parts of expandable graphite, 7 parts of organic bentonite, 6 parts of pozzolanic materials, 1 part of calcined diatomite, reinforced 3 parts of aggregate, 10 parts of quicklime, 10 parts of sodium hydroxide, 8 parts of the expansion resin, 6 parts of water glass, and 5 parts of carbon fiber. The expansion temperature range of expandable graphite is 200~400 degrees Celsius. The pozzolanic material is blast furnace slag. The swelling resin is sodium polyacrylate.

[0035] Its preparation method comprises the following steps:

[0036] (1) Mix aluminum sulfate cement clinker, pozzolanic materials, calcined diatomite, reinforced aggregate, quicklime and sodium hydroxide evenly, and set aside;

[0037] (2) Heat the expandable graphite to keep it in an expanded state, then add the mixture described in step 1 and mix well;

[0038] (3) ...

Embodiment 2

[0040] A composite curing agent for dredging silt, comprising the following components in parts by weight: 25 parts of aluminum sulfate cement clinker, 32 parts of expandable graphite, 5 parts of organic bentonite, 3 parts of pozzolanic materials, 2 parts of calcined diatomite, reinforced 4 parts of aggregate, 6 parts of quicklime, 12 parts of sodium hydroxide, 9 parts of the expansion resin, 7 parts of water glass, and 6 parts of carbon fiber. The expansion temperature range of expandable graphite is 200~400 degrees Celsius. The pozzolanic material is fly ash. The expansion resin is polyacrylamide. The preparation method is the same as in Example 1.

Embodiment 3

[0042] A composite curing agent for dredging silt, comprising the following components by weight: 30 parts of aluminum sulfate cement clinker, 34 parts of expandable graphite, 6 parts of organic bentonite, 5 parts of pozzolanic materials, 3 parts of calcined diatomite, reinforced 5 parts of aggregate, 8 parts of quicklime, 13 parts of sodium hydroxide, 10 parts of the expansion resin, 5 parts of water glass, and 7 parts of carbon fiber. The expansion temperature range of expandable graphite is 200~400 degrees Celsius. The pozzolanic material is fly ash. The expansion resin is polyacrylamide.

[0043] The preparation method is the same as in Example 1.

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Abstract

The invention relates to a compound curing agent for dredged silt and a preparation method thereof. The compound curing agent for dredged silt comprises the following components in parts by weight: 20-30 parts of aluminum sulfate cement clinker, 30-40 parts of expandable graphite, 5-10 parts of organobentonite, 3-8 parts of pozzolanic material, 1-3 parts of calcined diatomite, 3-5 parts of enhanced aggregate, 6-12 parts of quicklime, 10-15 parts of sodium hydroxide, 8-10 parts of expansible resin, 5-8 parts of sodium silicate and 5-8 parts of carbon fiber. The curing agent provided by the invention combines the respective advantages of multiple traditional soil stabilizers, and the various effective components are organically combined together according to a proper ratio, thereby giving full play to the characteristics and synergistic action of the components. The curing agent provided by the invention has the advantages of favorable early strength performance, excellent strength stability, favorable water stability and the like, can obviously improve the properties of silt such as high water content, low strength and the like, and converts the waste dredged silt into a reproducible geomaterial for utilization, thereby achieving excellent curing effects and economic effects.

Description

technical field [0001] The invention relates to a dredging mud composite solidifying agent and a preparation method thereof, belonging to the field of building materials. Background technique [0002] In the dredging process of the bottom sediment of ports, lakes and rivers in our country, a large amount of high water content sludge containing pollutants will be produced. From 1998 to 2003, my country dredged the Yangtze River, Yellow River, Haihe River, Huaihe River and other important waters such as Dongting Lake and Poyang Lake, and the amount of silt dredging reached 120 million cubic meters. The amount of silt dredging in tianjin port is about 5 million cubic meters per year, and the amount of silt dredging in wusi wharf of qinhuangdao port has reached 2.693 million cubic meters. From 1999 to 2000, the first phase of the Hangzhou West Lake dredging project accumulatively dredged more than 1 million cubic meters of silt. These silts have high moisture content, high cla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B18/02C02F11/00
CPCC02F11/008C02F2103/007C04B18/023C04B28/06C04B2111/00767C04B2201/50C04B14/024C04B14/104C04B14/08C04B22/064C04B22/062C04B12/04C04B14/386C04B18/141C04B24/2641C04B18/08C04B24/2652C04B14/043C04B14/10C04B14/06C04B14/042C04B14/041C04B14/303
Inventor 余思哲
Owner 余思哲
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