CN109081538A - A kind of river bottom mud curing method implemented based on liquid limit index - Google Patents
A kind of river bottom mud curing method implemented based on liquid limit index Download PDFInfo
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- CN109081538A CN109081538A CN201811036143.2A CN201811036143A CN109081538A CN 109081538 A CN109081538 A CN 109081538A CN 201811036143 A CN201811036143 A CN 201811036143A CN 109081538 A CN109081538 A CN 109081538A
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- curing agent
- liquid limit
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- bed mud
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- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a kind of river bottom mud curing methods implemented based on liquid limit index, it is using river bottom mud liquid limit value as main indicator, in conjunction with bed mud water content, the content of organic matter and Pore Solution COD content, cement and ardealite are matched to the curing process that city river bed mud is used for as curing agent by weight 1:0 ~ 0.4, so that it can meet general fill construction requirement.The present invention gives 120% or less liquid limits, 11% or less the content of organic matter, the specific curing agent of the following river bottom mud of Pore Solution COD content 1500mg/L is selected with when volume, help to carry out rapid curing processing to different type river bottom mud, plays the role of saving the duration, economize on resources.
Description
Technical field
The invention belongs to technical field of civil engineering, and in particular to a kind of river bottom mud solidification implemented based on liquid limit index
Method.
Background technique
River, waterway dredging dredging play the role of for the construction of infrastructure it is very crucial, as the country greatly develops life
State civilization construction carries out the long system in river, carries out " ten, water " and administer action, and center of gravity is placed in the improvement of black-odor riverway, more next
Each counties and cities are unfolded more projects about channel cleanout, lake treatment, ocean dredging at home.
City river Dredged bed mud typically appears as flow regime due to its high-moisture, low-intensity, but often containing at
Divide complicated polluter, it has also become the typical waste that amount is big, processing difficulty is high.By mixing curing agent, by river bottom mud
The effects of solidified earth with some strength is made, is convenient for landfill disposal, is also used as construction material, fill material plays
It is worth, and meets china natural resources recycling, sustainable development and the state basic policy for protecting environment.The country is existing for all kinds of curing agent very
More researchs, however certain specific bed mud is also rested on to the research of curing agent in engineering at present and takes specific curing agent.Gu
Agent type is more, causes different types of river bottom mud to select difficult.
Learn that traditional curing agent includes cement system and lime in bed mud solidifies, and is matched by domestic many researchs
Its effect can be played to greatest extent by closing all kinds of admixtures.With calcium sulfate industrial waste gypsum as main component and cement cooperation
At curing agent preferable effect can be played in many great soil groups, it is insufficient to exist wherein the application with ardealite is the most typical
Difference is influenced on solidification effect in the volume for different bed muds, ardealite, optimum adding quantity of pulverized is also uncertain.Meanwhile river
Often there is the biggish content of organic matter in road bed mud, shows that the content of organic matter in bed mud is anti-to hydrated cementitious according to correlative study
Inhibiting effect should be played, i.e., with the increase of the content of organic matter, solidification effect is reduced.
The selection of curing agent is a mostly important ring in the curing process of all kinds of river bottom muds, and suitable curing agent can
To enhance solidification effect, saves every cube of bed mud and use cement consumption.However it is suitable for for different type river bottom mud at present
Curing agent is not sought unity of standard, when needing to carry out curing process in engineering, to carry out different curing agent and dosage proportioning test,
Each engineering properties of solidified earth, not only delays the duration in this way, but also cause the waste of resource after measurement maintenance.
Summary of the invention
In order to solve the problems, such as that the invention proposes one kind to be based on liquid limit index in existing engineering present on curing agent selection
The river bottom mud curing method of implementation, by the liquid limit value of the bed mud soil of measurement as Con trolling index, in conjunction with water content, organic
Matter content and Pore Solution COD content determine that being suitable for different type river bottom mud solidifies curing agent proportion used.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of river bottom mud curing method implemented based on liquid limit index, is to be selected using the liquid limit value of bed mud as curing agent
Con trolling index, river bottom mud water content, the content of organic matter and the Pore Solution COD content of binding assay, cement and ardealite are pressed
The cooperation of weight ratio 1:0 ~ 0.4 carries out the solidification of city river bed mud as curing agent.
Specifically, when river bottom mud liquid limit is less than 40%, the ratio between bed mud water content and liquid limit < 1, the bed mud content of organic matter is small
In 4%, when Pore Solution COD content is 200mg/L or less, using cement as curing agent, curing agent volume is not less than 75 kg/
m3.3 day age of unconfined compression strength of solidified soil is up to 75kPa or more.
When river bottom mud liquid limit is less than 40%, the ratio between bed mud water content and liquid limit are 1 ~ 1.5, and the bed mud content of organic matter is less than
4%, when Pore Solution COD content is 200mg/L or less, cement and ardealite are regard as curing agent by weight 1:0.1 cooperation, Gu
Agent volume is 80 ~ 110 kg/m3。
When river bottom mud liquid limit is 40% ~ 80%, the ratio between bed mud water content and liquid limit >=1, the bed mud content of organic matter less than 4%,
When Pore Solution COD content is 200mg/L or less, cement and ardealite are regard as curing agent by weight the cooperation of 1:0.2 ~ 0.3；Its
In, when the ratio between bed mud water content and liquid limit are 1 ~ 1.5, curing agent volume is 100 ~ 120 kg/m3；When bed mud water content and liquid
When the ratio between limit is greater than 1.5, curing agent volume is not less than 120 kg/m3。
When river bottom mud liquid limit is 80 ~ 120%, the ratio between bed mud water content and liquid limit >=1, the bed mud content of organic matter is less than
11%, when Pore Solution COD content is 200 ~ 1500mg/L, cement and ardealite are regard as curing agent by weight 1:0.4 cooperation.
With the increase of liquid limit or water content, increase the volume of curing agent.Curing agent volume is bigger, and solidification effect is better；Wherein, work as bed mud
When the ratio between water content and liquid limit are 1 ~ 1.5, curing agent volume is 120 ~ 150 kg/m3；When the ratio between bed mud water content and liquid limit are big
When 1.5, curing agent volume is not less than 150 kg/m3。
Cement used is 32.5 composite Portland cements, and ardealite used is air-drying sample.
The present invention provides one kind to be suitable for liquid limit index less than 120%, and the content of organic matter is less than 11%, Pore Solution COD concentration
1500mg/L river bottom mud curing method below, convenient for carrying out rapid curing processing to different type river bottom mud.Pass through
" four change ", i.e. minimizing, stabilisation, innoxious, resource can be substantially met in engineering after this method treated solidified earth maintenance
The requirement of change, and the test number (TN) in engineering, test period can be reduced, the waste in resource is reduced, the duration is saved.For higher
It is required that solidification engineering, can be in the method further by changing volume, proportion, addition outer-penetrating agent, changing curing condition etc.
Measure is to reach requirement.
Specific embodiment
In order to make content of the present invention easily facilitate understanding, With reference to embodiment to of the present invention
Technical solution is described further, but the present invention is not limited only to this.
The content of organic matter is measured by the loss on ignition of bed mud soil, and temperature is 440 DEG C.
The COD content of Pore Solution is to be measured using potassium bichromate as oxidant by colorimetric method.
Cement used is 32.5 composite Portland cements, and ardealite used is air-drying sample.
Curing agent volume refers to that every m3 bed mud needs the gross mass of cement and ardealite to be used.
Embodiment 1:
In certain city's water system river regulation project, bed mud liquid limit 44.03%, loss-on-ignition measure the content of organic matter as 3.67%, weight chromium
Sour potassium is 84mg/L by colorimetric method for determining river water COD content as oxidant.When water content is 39.43%, bottom at this time is measured
The density of mud uses 50kg, 75kg, 100kg cement as curing agent according to every m3 bed mud soil.It is low by agitator for cement mortar
62 revs/min of speed are stirred 3 minutes, after the stirring 5 minutes of 125 revs/min of high speed, by solidified earth insert diameter 3.91cm, high 8cm half
In open cylinders organic glass mold, sufficiently vibrating reduces hole in solidified earth to the greatest extent.20 are put into after being sealed up for safekeeping with hermetic bag
± 2 DEG C, humidity greater than 95% curing box in conserve.Solidified earth should be demoulded after forming in 1 ~ 3 day and is put into preservative film package
In hermetic bag, continue to be conserved respectively in curing box under the same conditions to 3 days, 7 days, 28 days.It is solid to reach corresponding age taking-up
Change soil sample, without confining pressure instrument testing its unconfined compressive strength with strain-type, (unconfined compressive strength refers to solidified earth
Laterally without under constraint condition, applying pressure of cylindrical body axial compressive force when solidified earth is destroyed).
The results show that curing agent volume is 50kg/m3When, each age strength does not meet landfill and requires；Curing agent volume
For 75kg/m3When, intensity reaches 75kPa within 3 days；Curing agent volume is 100kg/m3When, intensity reaches 300kPa within 3 days, is all satisfied one
As fill require.
Embodiment 2:
In certain city's water system river regulation project, bed mud liquid limit 38.45%, the loss-on-ignition measurement content of organic matter are 3.98%, with weight
Potassium chromate is 164mg/L by colorimetric method for determining river water COD content as oxidant.When water content is 57.68%, this is measured
When bed mud density, according to every m3 use 100kg cement and 100kg cement be separately added into 10kg, 20kg, 30kg ardealite as
Curing agent.Manufacturing process, maintenance method and solidify the measurement of index all with embodiment 1.
The results show that curing agent volume is 100kg/m3When, 28 day age still not satisfied the intensity that landfill requires；Solidification
Agent volume is 110kg/m3When, age strength is up to 137kPa within 7 days；Curing agent volume is 120kg/m3When, 7 day age is reachable
82kPa；Curing agent volume is 130kg/m3When, 7 day age is up to 106kPa.General landfill is all satisfied to require.
Embodiment 3:
In certain city's water system river regulation project, bed mud liquid limit 44.03%, the loss-on-ignition measurement content of organic matter are 3.67%, with weight
Potassium chromate is 84mg/L by colorimetric method for determining river water COD content as oxidant.When water content is 66.05%, measurement is at this time
The density of bed mud uses 100kg cement and 100kg cement to be separately added into 10kg, 20kg, 30kg ardealite as admittedly according to every m3
Agent.Manufacturing process, maintenance method and solidify the measurement of index all with embodiment 1.
The results show that curing agent volume is 100kg/m3When, 28 day age still not satisfied the intensity that landfill requires；Solidification
Agent volume is 110kg/m3When, 7 days age strengths are unsatisfactory for landfill and require up to 50kPa, 28 days age strength 316kPa；Gu
Agent volume is 120kg/m3When, 7 day age is up to 246kPa；Curing agent volume is 130kg/m3When, 7 day age is reachable
202kPa.General landfill is all satisfied to require.
Embodiment 4:
In certain city's water system river regulation project, bed mud liquid limit 83.55%, the loss-on-ignition measurement content of organic matter are 10.26%, with weight
Potassium chromate is 1427.1mg/L by colorimetric method for determining river water COD content as oxidant.When moisture content is 83.55%, measurement
The density of bed mud at this time uses 100kg cement and 100kg cement according to every m3, is separately added into 20kg, 40kg ardealite as admittedly
Agent.Manufacturing process, maintenance method and solidify the measurement of index all with embodiment 1.
The results show that 100 kg/m of curing agent volume3When, 90 days age strength 64kPa are unsatisfactory for landfill and require；Solidification
Agent volume is 120 kg/m3When, 28 days age strength 103kPa；Curing agent is 140kg/m3When, 28 days age strength 138kPa.
Meet landfill to require.
Embodiment 5:
In certain city's water system river regulation project, bed mud liquid limit 111.9%, the loss-on-ignition measurement content of organic matter of acquirement are
It 10.59%, is 1440mg/L by colorimetric method for determining river water COD content using potassium bichromate as oxidant.When moisture content is
When 167.85%, the density of bed mud at this time is measured, the curing agent and volume used is shown in Table 1.Manufacturing process, maintenance method and solidification
The measurement of index is all the same as embodiment 1.Specific test data is shown in Table 1.
Table 1
Seen from table 1, curing agent volume is lower than 150 kg/m3, solidified earth was not satisfied landfill in 7 day age and requires, wherein solid
Agent volume is 120 kg/m3、140 kg/m3、150 kg/m3When, solidified earth can satisfy landfill in 28 day age and require.And
Curing agent volume is in 150 kg/m3More than, solidified earth can meet landfill in 7 day age and require.Curing agent volume is 210 kg/
m3When, 7 day age intensity up to 170 kg/m3。
By the various embodiments described above it can be seen that maintenance number of days increases, unconfined compression strength of solidified soil is significantly increased.And
For liquid limit and the higher bed mud of water content, with the increase of ardealite volume, the solidified earth later period increases more obvious.
Above embodiments show that the physicochemical properties index for needing to measure includes liquid using this method progress curing process
Limit, initial water content, the content of organic matter, river water COD content.For polluting less serious river, can not have to measure organic
Matter content and river water COD content.For seriously polluted river, volume can be increased in the method that the present invention provides, be added
The measures such as the extra material of other materials.Generally, the method that the present invention provides is suitable for the solidification of most cities river bottom mud
Processing.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, is all covered by the present invention.
Claims (6)
1. it is a kind of based on liquid limit index implement river bottom mud curing method, it is characterised in that: with river bottom mud liquid limit value be control
Index processed, in conjunction with bed mud water content, the content of organic matter and Pore Solution COD content, by cement and ardealite by weight 1:0 ~ 0.4
Cooperate the curing process that city river bed mud is carried out as curing agent.
2. river bottom mud curing method according to claim 1, it is characterised in that: when river bottom mud liquid limit is less than 40%,
The ratio between bed mud water content and liquid limit < 1, the bed mud content of organic matter is less than 4%, when Pore Solution COD content is 200mg/L or less, uses
Cement is not less than 75 kg/m as curing agent, curing agent volume3。
3. river bottom mud curing method according to claim 1, it is characterised in that: when river bottom mud liquid limit is less than 40%,
The ratio between bed mud water content and liquid limit are 1 ~ 1.5, and for the bed mud content of organic matter less than 4%, Pore Solution COD content is 200mg/L or less
When, cement and ardealite are regard as curing agent by weight 1:0.1 cooperation, curing agent volume is 80-110 kg/m3。
4. river bottom mud curing method according to claim 1, it is characterised in that: when river bottom mud liquid limit be 40% ~ 80%,
The ratio between bed mud water content and liquid limit >=1, the bed mud content of organic matter is less than 4%, will when Pore Solution COD content is 200mg/L or less
Cement and ardealite cooperate by weight 1:0.2 ~ 0.3 is used as curing agent；
Wherein, when the ratio between bed mud water content and liquid limit are 1 ~ 1.5, curing agent volume is 100 ~ 120 kg/m3；When bed mud is aqueous
When the ratio between amount and liquid limit are greater than 1.5, curing agent volume is not less than 120 kg/m3。
5. river bottom mud curing method according to claim 1, it is characterised in that: when river bottom mud liquid limit be 80 ~ 120%,
The ratio between bed mud water content and liquid limit >=1, the bed mud content of organic matter is less than 11%, when Pore Solution COD content is 200 ~ 1500mg/L,
Cement and ardealite are regard as curing agent by weight 1:0.4 cooperation；
Wherein, when the ratio between bed mud water content and liquid limit are 1 ~ 1.5, curing agent volume is 120 ~ 150kg/m3；When bed mud water content
When being greater than 1.5 with the ratio between liquid limit, curing agent volume is not less than 150 kg/m3。
6. river bottom mud curing method described in any one of -5 according to claim 1, it is characterised in that: cement used is
32.5 composite Portland cements.
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| CN201811036143.2A CN109081538A (en) | 2018-09-06 | 2018-09-06 | A kind of river bottom mud curing method implemented based on liquid limit index |
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| CN201811036143.2A CN109081538A (en) | 2018-09-06 | 2018-09-06 | A kind of river bottom mud curing method implemented based on liquid limit index |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115321787A (en) * | 2022-07-21 | 2022-11-11 | 中国电建集团华东勘测设计研究院有限公司 | Efficient composite medicament suitable for dewatering bottom mud of rivers and lakes and use method thereof |
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| US20140230267A1 (en) * | 2011-09-28 | 2014-08-21 | Huazhong University Of Science & Technology | Sludge drying composite conditioner and application method thereof |
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| RU2198142C1 (en) * | 2001-12-28 | 2003-02-10 | Кнатько Василий Михайлович | Method of neutralizing boring sludge contained in spent drilling mud |
| CN101220590A (en) * | 2008-01-04 | 2008-07-16 | 东南大学 | Sullage solidifying method |
| CN101579683A (en) * | 2009-05-27 | 2009-11-18 | 河海大学 | Phosphogypsum-sludge combined curing treatment method |
| CN101805104A (en) * | 2010-04-27 | 2010-08-18 | 河海大学 | Soil treatment method for dredged sediment |
| US20140230267A1 (en) * | 2011-09-28 | 2014-08-21 | Huazhong University Of Science & Technology | Sludge drying composite conditioner and application method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115321787A (en) * | 2022-07-21 | 2022-11-11 | 中国电建集团华东勘测设计研究院有限公司 | Efficient composite medicament suitable for dewatering bottom mud of rivers and lakes and use method thereof |
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Application publication date: 20181225 |