CN111847918A - Curing agent for dredging sludge in sea area - Google Patents
Curing agent for dredging sludge in sea area Download PDFInfo
- Publication number
- CN111847918A CN111847918A CN202010694630.9A CN202010694630A CN111847918A CN 111847918 A CN111847918 A CN 111847918A CN 202010694630 A CN202010694630 A CN 202010694630A CN 111847918 A CN111847918 A CN 111847918A
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- CN
- China
- Prior art keywords
- curing agent
- sludge
- dredging sludge
- sea area
- dredging
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing activators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a curing agent for sea area dredging sludge, which is suitable for comprehensively treating a large amount of dredging sludge generated by sea area engineering and channel excavation, and comprises the following raw materials (counted by weight percentage): 50-60% of cement clinker; 30-35% of blast furnace slag powder; 10-15% of gypsum powder. The curing agent realizes solidification and stabilization of the dredged sludge by using waste materials such as slag powder and the like, has simple materials, does not need special additives, and can perform resource comprehensive treatment on the slag powder, the sea area dredged sludge and the like by using the dredged sludge curing agent, effectively improve the solidification strength of the dredged sludge, solve the problems of water and soil environmental pollution and the like, save energy, protect environment, have low cost and meet the requirements of actual engineering.
Description
Technical Field
The invention belongs to the field of curing agents, and particularly relates to a curing agent for dredging sludge generated in sea engineering and channel excavation.
Background
Dredging in the broad sense generally refers to engineering operations for dredging or digging and widening water areas such as oceans, rivers, lakes and the like. The dredging engineering has been replaced by the past manual labor by the present mechanical automation, but the development of the dredging engineering is accompanied by the generation of a large amount of dredging sludge, and how to effectively process the dredging sludge is a key consideration for relevant scientific researchers.
With the increasing of the external openness degree of China, foundation pit foundations of buildings such as airports, ports and wharfs in coastal cities need to occupy a large amount of land resources, and dredger fill soil reclamation projects combined with dredging are increasingly developed. Stabilization and harmless treatment of dredged sludge become an urgent problem to be solved. The curing agent is a general term of one or more mixed chemicals which are added into a material needing to be cured so as to improve the bearing capacity of the material and reduce stress deformation, and at present, the research results on the dredging sludge curing agent are more, but most of the results use more materials, the implementation conditions are severe, and the process flow is complex.
Therefore, a curing agent which is simple in material, convenient and fast in implementation method, more economical and applicable is urgently needed to be found so as to be used for treating dredged sludge generated by sea area engineering and channel excavation.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides the curing agent for the dredging sludge in the sea area, the invention can realize the comprehensive recycling treatment of slag, dredging sludge and the like, effectively improve the curing strength of the dredging sludge, has simple materials, does not need special additives and can meet the actual engineering requirements.
The invention adopts a specific implementation scheme on the basis of achieving the aim as follows: a curing agent for sea area dredging sludge comprises the following raw materials (counted by weight percentage): 50-60% of cement clinker, 30-35% of blast furnace slag powder and 10-15% of gypsum powder.
The curing agent of the invention is further optimized, and comprises the following raw materials (counted by weight percent): 56.25 percent of cement clinker, 31.25 percent of blast furnace slag powder and 12.5 percent of gypsum powder.
The curing agent is further optimized, the cement clinker is silicate cement clinker, and the specific surface area of the cement clinker is 350-450m2/kg。
The curing agent is further optimized, and the specific surface area of the blast furnace slag powder is 300-600m2/kg。
The curing agent is further optimized, and the gypsum powder is industrial waste gypsum powder.
The preparation method of the curing agent for the sea area dredging sludge, provided by the invention, comprises the steps of mixing the curing agent materials (cement clinker, blast furnace slag powder and gypsum powder) according to the weight percentage, and stirring the mixture uniformly to obtain the curing agent.
The application method of the curing agent for the sea area dredging sludge, provided by the invention, comprises the steps of uniformly mixing the dredging sludge and the curing agent, and naturally curing; wherein the mass ratio of the curing agent is 10-16% of the total mass (mixing ratio) of the dredged sludge.
Compared with the prior dredged sludge curing agent, the invention has the obvious benefits that:
according to the dredged sludge curing agent disclosed by the invention, the solidification and stabilization of the dredged sludge are realized, the materials used by the curing agent are simple, the sources are wide and most industrial waste materials are adopted, on one hand, the comprehensive recycling treatment of slag, gypsum powder and the dredged sludge in sea areas can be realized, and better environmental benefits can be brought; on the other hand, the sea area dredging sludge can enable the solidification environment to reach a certain pH value without special additives and special process environment treatment, and the curing agent and the sea area dredging sludge mixed slurry have good gelling performance. In addition, the curing agent material and the sea area dredging sludge can be filled in different grades, the water content of the sludge is reduced, the curing rate is promoted, the curing strength is improved, the problems of water and soil environmental pollution and the like are solved, the energy is saved, the environment is protected, the price is low, the total engineering cost is saved, the actual engineering requirements are met, and the curing agent material can be used for large-scale dredging sludge curing treatment.
Detailed Description
The present invention will be described in more detail with reference to specific embodiments. It should be understood that the examples are for the purpose of better illustrating the invention to workers skilled in the art and are not to be construed as limiting the scope of the invention.
The sludge in the following examples has various detection indexes:
in the following examples, the cement clinker is Portland cement clinker with a specific surface area of 350-2Perkg, Tiger brand cement Limited in Dalian Waspammer.
The specific surface area of the blast furnace slag powder in the following examples is 300-600m2Perkg, Tiger brand cement Limited in Dalian Waspammer.
In the following examples, the gypsum powder is industrial waste gypsum powder, Tiger brand cement of great continuous tile house.
Example 1
A curing agent for sea area dredging sludge comprises the following raw materials (counted by weight percentage): 56.25 percent of cement clinker, 31.25 percent of blast furnace slag powder, 12.25 percent of gypsum powder and curing agent materials (the cement clinker, the blast furnace slag powder and the gypsum powder) are mixed and stirred uniformly according to the mass ratio to obtain the curing agent. And uniformly mixing the dredged sludge and a curing agent, and naturally curing to obtain sludge cured soil, wherein the mass ratio of the curing agent is 10% of the dry mass of the dredged sludge.
Example 2
A curing agent for sea area dredging sludge comprises the following raw materials (counted by weight percentage): 56.25 percent of cement clinker, 31.25 percent of blast furnace slag powder, 12.25 percent of gypsum powder and curing agent materials (the cement clinker, the blast furnace slag powder and the gypsum powder) are mixed and stirred uniformly according to the mass ratio to obtain the curing agent. And uniformly mixing the dredged sludge and a curing agent, and naturally curing to obtain sludge cured soil, wherein the mass ratio of the curing agent is 13% of the dry mass of the dredged sludge.
Example 3
A curing agent for sea area dredging sludge comprises the following raw materials (counted by weight percentage): 56.25 percent of cement clinker, 31.25 percent of blast furnace slag powder, 12.25 percent of gypsum powder and curing agent materials (the cement clinker, the blast furnace slag powder and the gypsum powder) are mixed and stirred uniformly according to the mass ratio to obtain the curing agent. And uniformly mixing the dredged sludge and a curing agent, and naturally curing to obtain sludge cured soil, wherein the mass ratio of the curing agent is 16% of the dry mass of the dredged sludge.
Example 4
The above-mentioned silt-solidified soils of examples 1 to 3 were subjected to the results of the unconfined compressive strength test using a strain-controlled unconfined compressive strength meter (each example was divided into five groups of tests and the average value was calculated; reference specifications are as follows: Standard test methods for soil engineering (GB/T50123-1999) and Specification for soil engineering (SL 237-1999)):
the above embodiments are only examples of the present invention, not intended to limit the scope of the present invention, and it should be understood that any changes made within the scope of the present invention without making an innovative change should fall within the scope of the present invention.
Claims (7)
1. The curing agent for the sea area dredging sludge is characterized by comprising the following raw materials in percentage by weight: 50-60% of cement clinker, 30-35% of blast furnace slag powder and 10-15% of gypsum powder.
2. The curing agent for sea dredging sludge according to claim 1, wherein the curing agent comprises the following raw materials in percentage by weight: 56.25 percent of cement clinker, 31.25 percent of blast furnace slag powder and 12.5 percent of gypsum powder.
3. The curing agent for sea dredging sludge as claimed in claim 1, wherein the specific surface area of the cement clinker is 350-500m2/kg。
4. The curing agent for sea dredging sludge as claimed in claim 1, wherein the specific surface area of the blast furnace slag powder is 300-600m2/kg。
5. The curing agent for marine dredging sludge according to claim 1, wherein the landplaster is industrial waste landplaster.
6. The method for preparing the curing agent for sea dredging sludge according to any one of claims 1 to 5, wherein the curing agent is prepared by mixing cement clinker, blast furnace slag powder and gypsum powder and stirring the mixture until the mixture is uniform.
7. The method for using the curing agent for the sea area dredging sludge as claimed in any one of claims 1 to 5, wherein the dredging sludge is mixed with the curing agent uniformly and cured naturally; wherein the mass ratio of the curing agent is 10-16% of the total mass of the dredged sludge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010694630.9A CN111847918A (en) | 2020-07-17 | 2020-07-17 | Curing agent for dredging sludge in sea area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010694630.9A CN111847918A (en) | 2020-07-17 | 2020-07-17 | Curing agent for dredging sludge in sea area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111847918A true CN111847918A (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010694630.9A Pending CN111847918A (en) | 2020-07-17 | 2020-07-17 | Curing agent for dredging sludge in sea area |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113603443A (en) * | 2021-09-09 | 2021-11-05 | 中交天津航道局有限公司 | High-strength cementing agent suitable for marine sludge and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4124405A (en) * | 1975-08-06 | 1978-11-07 | Pec-Engineering Societe Anonyme | Process for solidifying aqueous wastes and products thereof |
| CN1632054A (en) * | 2004-11-15 | 2005-06-29 | 北京清大中土科技有限责任公司 | Soil stabilizing curing agent |
| CN101428956A (en) * | 2008-12-09 | 2009-05-13 | 武汉科技学院 | Sullage solidifying agent |
| CN105924109A (en) * | 2016-04-21 | 2016-09-07 | 天津市三川恒泰科技有限公司 | Beach sludge composite curing agent as well as preparation method, use method and application thereof |
-
2020
- 2020-07-17 CN CN202010694630.9A patent/CN111847918A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4124405A (en) * | 1975-08-06 | 1978-11-07 | Pec-Engineering Societe Anonyme | Process for solidifying aqueous wastes and products thereof |
| CN1632054A (en) * | 2004-11-15 | 2005-06-29 | 北京清大中土科技有限责任公司 | Soil stabilizing curing agent |
| CN101428956A (en) * | 2008-12-09 | 2009-05-13 | 武汉科技学院 | Sullage solidifying agent |
| CN105924109A (en) * | 2016-04-21 | 2016-09-07 | 天津市三川恒泰科技有限公司 | Beach sludge composite curing agent as well as preparation method, use method and application thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113603443A (en) * | 2021-09-09 | 2021-11-05 | 中交天津航道局有限公司 | High-strength cementing agent suitable for marine sludge and preparation method thereof |
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Application publication date: 20201030 |