CN109694167A - A kind of mud compound solidification material - Google Patents
A kind of mud compound solidification material Download PDFInfo
- Publication number
- CN109694167A CN109694167A CN201710977506.1A CN201710977506A CN109694167A CN 109694167 A CN109694167 A CN 109694167A CN 201710977506 A CN201710977506 A CN 201710977506A CN 109694167 A CN109694167 A CN 109694167A
- Authority
- CN
- China
- Prior art keywords
- mud
- solidification material
- flyash
- gypsum
- cement
- Prior art date
- 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.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/008—Sludge treatment by fixation or solidification
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0045—Composites
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Supply & Treatment (AREA)
- Ceramic Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Sludge (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
A kind of mud compound solidification material, including cement, bentonite, flyash, gypsum, metallic stabilizer.Each composition quality score are as follows: cement 40~50%, bentonite 35~45%, flyash 10~15%, heavy metal stabilizer 1~2%, surplus are gypsum.It mixes in proportion and manufactured Mixed Type Silt Solidification Material, the high-moisture percentage of mud, low intensive property can be improved, the waste silt for generating pollution to environment is regenerated as adaptable earth working material in engineering by stabilizing heavy metal.The waste material or commercially available industrial goods that curing materials are generated using industry, it is from a wealth of sources, it is low in cost, economically it is significantly better than external curing materials.
Description
Technical field
The present invention relates to a kind of mud compound solidification materials.
Background technique
The water bodys such as river and lake, since a large amount of silts in upstream and receiving Wastewater Pollutant are deposited in the bottom for a long time, not only
River traffic and lake storage capacity are influenced, can also reduce river and lake flood control water drainage ability, therefore river needs are periodically dredged
Work.Contain plurality of heavy metal ion and organic matter in the mud cleaned up, wherein organic matter is high, Cr, Zn, Pb, Ni, Cu etc.
Concentration of metal ions is exceeded, and moisture content is high in addition, particle is relatively thin, intensity and low bearing capacity, and after dredging, mud is directly stacked, heap
A large amount of land resource is occupied during putting, as the loss of earth's surface rainfall runoff causes secondary pollution to water environment.
In existing reuse of dredging technology, specifically includes that and throw mud processing, reclamation by pumping filling, physics dehydration, burn and change
Chemosetting.Throwing mud processing refers to sheds in certain sea area lighter mud is polluted, and this method can handle bed mud
The lighter mud of pollution of surface.Mud is collected in dyke by reclamation by pumping filling, to form land as sludge dewatering consolidates, but is become silted up
Mud dewatering time is longer.Physics dehydration refers to being dehydrated mud using dehydration equipment, and large-scale dredging work is come
It says, dehydration efficiency is low and higher cost.Burning is that have certain calorific value using the organic matter in mud, and high temperature is by mud
Grain consolidation regeneration becomes construction material, requires the content of organics in mud higher the disadvantage is that burning, and regenerated curing sludge
The risk for thering is heavy metal to dissolve out.Chemical curing processes are stirred by adding curing materials to mud so that curing materials and mud
It is sufficiently mixed, and further occurrence hydrolysis and hydration reaction, the hydrated product of generation are attached to muck surface and form connection, improve
The waste silt for generating pollution to environment is regenerated as in engineering by the high-moisture percentage of mud, low intensive property, stabilizing heavy metal
Adaptable earth working material is widely used in municipal works, road engineering and embankment reinforcement etc..
Utilizing solidified earth from sludge belongs to Modified soil, and sludge solidification effect and unconfined compressive strength, aqueous are thought in existing research
The technical indicators such as rate, infiltration coefficient are related.From engineering viewpoint, curing sludge key technology is to utilize simple technology
With low-cost curing materials, reduces mud water content and reach the physical strength of resource utilization.
Summary of the invention
The present invention provides a kind of formula mud compound solidification material simple, easy to use, adds in proportion to mud
Cement, bentonite, flyash, gypsum, metallic stabilizer are effectively reduced the moisture content of mud and improve the physics of curing sludge
Curing sludge resource utilization is made construction material by intensity, is avoided mud from stacking and is occupied extensive land resource and heavy metal two
Secondary dissolution causes environmental pollution.
A kind of mud compound solidification material, it is characterised in that including cement, bentonite, flyash, gypsum and metal
Stabilizer, each composition quality score are as follows: cement 40~50%, bentonite 35~45%, flyash 10~15%, heavy metal are stablized
Agent 1~2%, surplus are gypsum.Heavy metal stabilizer, including sodium hydroxide, ferrous sulfate, vulcanized sodium, iron chloride and high score
At least one of sub- organic stabilizer.
For 80%~120% mud of initial aqueous rate, using compound solidification material of the present invention, curing materials additive amount
In 100~140kg/m3When, that is, it is able to satisfy the intensity requirement of roadbed.
A kind of sludge solidification material, applying step are as follows:
(1) mud is obtained by dredging engineering；
(2) it according to the weight proportion blended cement, bentonite, flyash, gypsum and metallic stabilizer, obtains compound solid
Change material；
(3) according to 100~140kg/m3Compound curing agent is added in mud, stirs and evenly mixs；
(4) mud for being mixed with curing materials is transported to filling roadbed construction ground, is tamped using road roller etc. is mechanical.
Compared with prior art, advantages of the present invention and good effect are as follows.
(1) waste material or commercially available industrial goods that curing materials are generated using industry, it is from a wealth of sources, it is low in cost, make flyash
Equal industrial wastes can recycle as curing agent, provide the new approaches of treated coal ash, be economically significantly better than external solidification
Material.
(2) it is suitable for large-scale, large-scale dredging work；Easy construction is flexible, reduces dredging work cost.
(3) utilizing solidified earth from sludge intensity is improved, can be used as construction material, slow down environmental disruption caused by cutting into a mountain for quarrying.
(4) infiltration coefficient of utilizing solidified earth from sludge and Leaching of Heavy Metals liquid meet relevant criterion, and the pollutants such as heavy metal are not easy
Diffusion causes secondary pollution.
Specific embodiment
In conjunction with following instance, the invention will be further described.
Embodiment, a kind of mud compound solidification material, steps are as follows:
(1) mud is obtained by dredging engineering；
(2) according to the mixing cured material of following weight proportion, cement 42%；Bentonite 38%；Flyash 15%；Heavy metal is stablized
Agent 2%；Gypsum 3%, obtains compound solidification material；
(3) according to 100kg/m3Compound curing agent is added in mud, stirs and evenly mixs；
(4) mud for being mixed with curing materials is transported to filling roadbed construction ground, is tamped using road roller etc. is mechanical；
(5) sprinkling maintenance is used, 7 days unconfined compression strength of solidified soil 1.6Mpa, infiltration coefficient is less than 1 × 10-5Cm/s becomes silted up
The pH value of mud solidified earth leachate is 7.8.The concentration of each Leaching of Heavy Metals liquid of mud is lower than " hazardous waste after curing process 7 days
Judging standard leaching characteristic identification " (GB 5085.3-2007) concentration limit, reach associated acceptance solid standard.
Curing reaction process is as follows: (1) launching air raids and make between the cementing soil particle effect of the package of cement-hydrate and filler particles
With the main source for being solidified earth intensity, the silicate calcium compound aquation in cement generates hydrated calcium silicate (C-S-H) and water
Change alumina silicate (C-A-H)；(2) bentonite is a kind of using montmorillonite as the nonmetallic minerals of main mineral constituent, has strong suction
It is special to be dispersed into colloid clay using the lamellar structure and its can be swollen in water of montmorillonite in bentonite for moist and dilatancy
Property, metal ion in mud is adsorbed, the performance parameter of mud is changed, reduces the Free water in mud；(3) main in flyash
Chemical component is SiO2, Al2O3, MgO, Fe2O3 and CaO, is the primary solids waste of coal-burning power plant's discharge, is China when front row
Measure one of biggish industrial residue.Flyash activity excites in alkaline solution, part silicon oxygen bond (- Si-O-), alumina key (-
Al-O- it) is broken, forms the scramble network structure of quasi-vitreous.Fly ash replaces part of cement in sludge solidification, no
It is only capable of reducing cost, moreover it is possible to improve the corrosion resistance of curing sludge, mitigate particle separation and bleed phenomenon；(4) gypsum has
There is microcellular structure, improves soil texture for neutral or acid soil.Gypsum is easy the aquation generated with cement autoreactivity
Calcium silicates (C-S-H) reaction generates entringite and is filled in solidified earth and enhances the intensity of solidified earth；(5) metallic stabilizer will
Molecular link and heavy metal in sludge are combined into strong bond reference state, and heavy metal is made to be not easy to migrate or dissolve out in curing sludge.
This formula carries out curing process what is involved is the mud generated in a kind of pair of hydraulic engineering and civil engineering and is used
Mixed Type Silt Solidification Material.Cement, flyash, waste gypsum, bentonite and the heavy metal stabilizer mud in high-moisture percentage
Middle to chemically react, uniformly mixed and manufactured Mixed Type Silt Solidification Material, can improve mud according to a certain percentage
The waste silt for generating pollution to environment is regenerated as in engineering to answer by high-moisture percentage, low intensive property, stabilizing heavy metal
Earth working material.Raw material used in formula is the waste material largely generated in industrial production, and raw material sources are extensive, and price is just
Preferably, external curing materials are economically significantly better than.
Claims (5)
1. a kind of mud compound solidification material, it is characterised in that steady including cement, bentonite, flyash, gypsum and metal
Determine agent.
2. mud compound solidification material as claimed in claim 1, each composition quality score are as follows: cement 40~50%, swelling
Soil 35~45%, flyash 10~15%, heavy metal stabilizer 1~2%, surplus are gypsum.
3. the heavy metal stabilizer as described in claims 1,2, which is characterized in that including no sodium hydroxide, ferrous sulfate, vulcanization
At least one of sodium, iron chloride and macromolecule organic stabilizer.
4. preferably for 80%~120% mud of initial aqueous rate, using compound solidification material of the present invention, curing materials
Additive amount is in 100~140kg/m3When, that is, it is able to satisfy the intensity requirement of roadbed.
5. a kind of sludge solidification material, applying step are as follows: (1) mud is obtained by dredging engineering；(2) according to described heavy
Amount proportion blended cement, bentonite, flyash, gypsum and metallic stabilizer, obtain compound solidification material；(3) according to 100
~140kg/m3Compound curing agent is added in mud, stirs and evenly mixs；(4) mud for being mixed with curing materials is transported to filling out
It builds the road base construction ground, is tamped using road roller etc. is mechanical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710977506.1A CN109694167A (en) | 2017-10-19 | 2017-10-19 | A kind of mud compound solidification material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710977506.1A CN109694167A (en) | 2017-10-19 | 2017-10-19 | A kind of mud compound solidification material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109694167A true CN109694167A (en) | 2019-04-30 |
Family
ID=66225019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710977506.1A Pending CN109694167A (en) | 2017-10-19 | 2017-10-19 | A kind of mud compound solidification material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109694167A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111321742A (en) * | 2020-03-08 | 2020-06-23 | 华中科技大学 | Integrated treatment and filling device and method for sludge with high water content |
| CN111960646A (en) * | 2020-09-23 | 2020-11-20 | 吴根花 | Preparation method of sludge dewatering flocculant suitable for large-scale sewage treatment plant |
| CN112794591A (en) * | 2021-03-23 | 2021-05-14 | 深圳瑞新达新能源科技有限公司 | Composite sludge curing agent |
| CN113387655A (en) * | 2021-07-08 | 2021-09-14 | 上海环境卫生工程设计院有限公司 | Cement-based curing material, application thereof and building decoration garbage slag powder curing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6132355A (en) * | 1996-02-28 | 2000-10-17 | Solvay (Societe Anonyme) | Ash inerting method |
| CN105367009A (en) * | 2015-10-26 | 2016-03-02 | 广东工业大学 | Sludge curing agent and preparing method and application thereof |
| CN105859068A (en) * | 2016-06-20 | 2016-08-17 | 广州市水电建设工程有限公司 | Sludge treatment process |
| CA2971138A1 (en) * | 2015-02-17 | 2016-08-25 | Italcementi S.P.A. | An environmentally sustainable cement composition, its use for inerting dredging sediments/sludges, relative method and apparatus for inerting |
-
2017
- 2017-10-19 CN CN201710977506.1A patent/CN109694167A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6132355A (en) * | 1996-02-28 | 2000-10-17 | Solvay (Societe Anonyme) | Ash inerting method |
| CA2971138A1 (en) * | 2015-02-17 | 2016-08-25 | Italcementi S.P.A. | An environmentally sustainable cement composition, its use for inerting dredging sediments/sludges, relative method and apparatus for inerting |
| CN105367009A (en) * | 2015-10-26 | 2016-03-02 | 广东工业大学 | Sludge curing agent and preparing method and application thereof |
| CN105859068A (en) * | 2016-06-20 | 2016-08-17 | 广州市水电建设工程有限公司 | Sludge treatment process |
Non-Patent Citations (2)
| Title |
|---|
| 张立钦等: "《农业生态环境污染防治与生物修复》", 31 December 2005, 中国环境科学出版社 * |
| 温俊明: "《传染性固体废物处理与处置》", 31 December 2016, 河南科学技术出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111321742A (en) * | 2020-03-08 | 2020-06-23 | 华中科技大学 | Integrated treatment and filling device and method for sludge with high water content |
| CN111960646A (en) * | 2020-09-23 | 2020-11-20 | 吴根花 | Preparation method of sludge dewatering flocculant suitable for large-scale sewage treatment plant |
| CN112794591A (en) * | 2021-03-23 | 2021-05-14 | 深圳瑞新达新能源科技有限公司 | Composite sludge curing agent |
| CN113387655A (en) * | 2021-07-08 | 2021-09-14 | 上海环境卫生工程设计院有限公司 | Cement-based curing material, application thereof and building decoration garbage slag powder curing method |
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Application publication date: 20190430 |
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