CN101035951A - Method for de- watering a slurry - Google Patents
Method for de- watering a slurry Download PDFInfo
- Publication number
- CN101035951A CN101035951A CNA2005800335061A CN200580033506A CN101035951A CN 101035951 A CN101035951 A CN 101035951A CN A2005800335061 A CNA2005800335061 A CN A2005800335061A CN 200580033506 A CN200580033506 A CN 200580033506A CN 101035951 A CN101035951 A CN 101035951A
- Authority
- CN
- China
- Prior art keywords
- slurry
- charge density
- water
- sedipur
- jet grouting
- 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.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Agronomy & Crop Science (AREA)
- Civil Engineering (AREA)
- Soil Sciences (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Treatment Of Sludge (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Glass Compositions (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
A method of de-watering a slurry mixture produced from a jet grouting operation, comprising the addition to the mixture of an anionic polyacrylamide in such manner that it is uniformly distributed therein, the anionic polyacrylamide having a high molecular weight and a low-medium charge density. Dewatering is achieved readily and economically.
Description
The present invention relates to Chemical composition that used in jet grouting and the jet grouting.
Jet grouting is the earth reinforcing technique, has been widely used in many civil engineerings and has used.For example, can provide the basis for the structure that will erect,, produce hypotonicity and isolate, produce support or braced structures, enhancing soil property and finish other earth structure from following reinforcing existing structure with this technology.The jet grouting method is composed as follows: depolymerization earth or weak rock make it to mix and partly replaced with the adhesive that generally is cement-Ji grout; Depolymerization realizes that with the high energy gunite of fluid fluid can be water or grout itself, depends on used system.
At first, boring a diameter in soil, to be generally 90～150mm, the degree of depth be the hole that soil is intended reinforcement depth.When reaching appropriate depth, rotate a bar in the original place, and be injected into fluid (water or bonding grout itself) from the nozzle that is positioned at rod end with high pressure.Its effect is to cut original earth and replace the earth-grout mixture that will harden.Constantly in the injection bar is withdrawed from gradually by swingle.The result is the cylindric compacted soil that will harden and form the compacted soil unit.In this operating period, can control lever move the soil property that forms different geometries, as post and plate.
Though in reinforcing, will use a large amount of earth, a large amount of all be pulled away with the slurry form of the mixture of earth, cement and water.Slurry generally will be walked by pump from the scene of carrying out grouting operation, so it carries out pump with conventional hydraulic pumps if the fluidisation of slurry is not enough draws, and then generally will add water.The result is the water that slurry contains significant proportion, often surpasses 80%.The typical content of slurry is 50～85 weight % water, one of 15～50 weight % cement and soil (latter generally is clay or flour sand).But do not know whether slurry has these scopes other composition in addition.In addition, this class slurry can be included as other composition that improves grout property and add, as plasticizing agent, super agent, accelerator and the inhibitor moulded.Owing to there is cement, this class slurry often has high pH value, surpasses 12 sometimes.
The amount of slurry that produces becomes with the type of processing soil.Jet grouting operation general slowly in the many clay, the amount of slurry of generation may be very many.Though this class slurry can be used for sometimes, for example, backfill must done a large amount of the processing with burying, and this is very expensive for the jet grouting contractor.
Have now found that, might make this class slurry mix dehydration with simply and effectively handling.The invention provides and make the slurry mix dehydration method that originates from the jet grouting operation, be included in and add PAMA in the mixture, the adding mode will make it to be evenly distributed on wherein, and described PAMA has HMW and low-dielectric charge density.
The PAMA of finding low-dielectric charge density has in high pH value slurry so that good dehydrating effect is very unexpected, because accepted practice is the polyacrylamide with high charge density.
Be applicable to that PAMA of the present invention has HMW, promptly weight average molecular weight is at least 4,000, and 000.Molecular weight is preferably 5,000, and 000～20, between 000,000.In addition, this polyacrylamide has low-dielectric charge density.Charge density, the indication of promptly given molecular weight charged species undergoes quantity is a parameter well known and that mention again and again in industrial document.It is meant the percentage composition of PAA in the polymer.Be purpose of the present invention, low-dielectric charge density is the class in 5～70% scopes.Be purpose of the present invention, those charge density are that 10%～50% high weight average molecular weight PAMA is the most effective and preferable material.
In meeting the proprietary concentrate of above-mentioned requirements, " Sedipur " (trade mark) series of BASF is arranged.Its representative instance comprises " Sedipur " AF203, TF2-TR and AF 404.
Used dosage is 150～500ppm of slurry, preferred 200～350ppm.
In according to method of the present invention, at first polyacrylamide is dissolved in the water, to obtain the solution that concentration is generally 0.5～1 weight %, while stirring this solution is added slurry then.Its effect is to separate water outlet and the denseness of slurry is changed to grey pulpous state from fluid from earth-cement slurry.When with stirring, separating generally need be less than 5min., and the water of separating can be let alone to flow away simply, perhaps, also can go out hydraulic pressure with some pressure.The water that flows out generally is thorough clearly, through suitably arranging into sewerage system simply after the neutralization, perhaps, if allow, can arrange in the open environment.Its result can reduce at the cost of handling above-mentioned slurry with burying greatly, because dehydration has reduced slurry volume, and the price of disposal in dry material is also than disposing the low of fluent material.
Reach optimum efficiency for making according to method of the present invention, the solid content of processed slurry generally should be at the most 50%, and preferably at the most 45%, survey as the method that is used in 105 ℃ of drying in oven samples.These content data distribute more uniformly based on particle sizes such as slurry medium clay soil, flour sand, cement.But work as the material that slurry contains the fraction larger particle size, (may take place in the practice) during as sand and ball clay, the solid content that records given sample can be much higher.In this case, the behavior of the inventive method is unaffected, and, be purpose of the present invention, this class slurry is also regarded as dropped within the above solid content scope that provides.
The present invention also will be further described with reference to following non-limiting example.
Test the dehydration property of a series of PAMAs.Experimental material is as follows:
| Embodiment number | Polyacrylamide | Average MW | Charge density |
| 1 2 3 4 5 6 7 8 | SEDIPUR AF100 SEDIPUR AF203 SEDIPUR AF204 SEDIPUR AF205 SEDIPUR TF2-TR SEDIPUR AF404 SEDIPUR AF701 SEDIPUR AF900 | 10,000,000 5,000,000 12,000,000 19,000,000 11,000,000 15,000,000 13,000,000 15,000,000 | 10％ 20％ 20％ 20％ 20％ 40％ 70％ 90％ |
As follows to material test.Preparation contains the sample of this slurry of 25% fine earth (flour sand and clay), 15% cement and 60% water.Each polyacrylamide shown in above is added a slurry sample respectively with the ratio of 280ppm, stir gently simultaneously.The efficiency assessment of each polyacrylamide is as follows: how soon dewatered, how soon removed the back remaining solid formation of how much water and dehydration rigidity soil property has.
The result that assessment obtains with various materials and the results are shown in the following table, wherein +++expression is good, ++ expression average (but qualified) ,+expression have certain effect (but defective) and-represent to no effect.
Embodiment result
1 +++
2 +++
3 +++
4 +++
5 +++
6 ++
7 +
8 -
Claims (1)
1. make the slurry mix dehydration method that originates from the jet grouting operation, be included in this mixture and add PAMA, the adding mode will make it to be evenly distributed on wherein, and described PAMA has HMW and low-dielectric charge density.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB0421841.8A GB0421841D0 (en) | 2004-10-01 | 2004-10-01 | Process |
| GB0421841.8 | 2004-10-01 | ||
| PCT/EP2005/009112 WO2006037403A1 (en) | 2004-10-01 | 2005-08-24 | Method for de- watering a slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101035951A true CN101035951A (en) | 2007-09-12 |
| CN101035951B CN101035951B (en) | 2010-05-26 |
Family
ID=33427906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005800335061A Expired - Fee Related CN101035951B (en) | 2004-10-01 | 2005-08-24 | Method for de-watering a slurry |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP1805374B1 (en) |
| JP (1) | JP2008514411A (en) |
| CN (1) | CN101035951B (en) |
| AT (1) | ATE468439T1 (en) |
| AU (1) | AU2005291642B2 (en) |
| DE (1) | DE602005021386D1 (en) |
| ES (1) | ES2345990T3 (en) |
| GB (1) | GB0421841D0 (en) |
| NO (1) | NO20072228L (en) |
| WO (1) | WO2006037403A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6041509B2 (en) * | 2012-03-29 | 2016-12-07 | 栗田工業株式会社 | Method for producing granulated solidified soil of self-hardening sludge |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5286806C1 (en) * | 1993-05-14 | 2001-01-30 | Cytec Tech Corp | Methods of making and using high molecular weight acrylamide polymers |
| JP3540838B2 (en) * | 1994-05-02 | 2004-07-07 | 三信建設工業株式会社 | Method and apparatus for treating excess slime of jet grout |
| US5961839A (en) * | 1997-02-07 | 1999-10-05 | Simmsgeiger; Patrick A. | Method for clearing ornamental bodies of water |
| JPH10272306A (en) * | 1997-03-31 | 1998-10-13 | Nitto Chem Ind Co Ltd | Method for dewatering waste slurry |
| US5922207A (en) * | 1997-05-16 | 1999-07-13 | Engelhard Corporation | Filter aid for clay processing |
-
2004
- 2004-10-01 GB GBGB0421841.8A patent/GB0421841D0/en not_active Ceased
-
2005
- 2005-08-24 AT AT05776352T patent/ATE468439T1/en active
- 2005-08-24 WO PCT/EP2005/009112 patent/WO2006037403A1/en active Application Filing
- 2005-08-24 AU AU2005291642A patent/AU2005291642B2/en not_active Ceased
- 2005-08-24 ES ES05776352T patent/ES2345990T3/en active Active
- 2005-08-24 EP EP05776352A patent/EP1805374B1/en not_active Not-in-force
- 2005-08-24 DE DE602005021386T patent/DE602005021386D1/de active Active
- 2005-08-24 CN CN2005800335061A patent/CN101035951B/en not_active Expired - Fee Related
- 2005-08-24 JP JP2007533888A patent/JP2008514411A/en active Pending
-
2007
- 2007-04-27 NO NO20072228A patent/NO20072228L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| AU2005291642B2 (en) | 2009-10-01 |
| NO20072228L (en) | 2007-07-02 |
| WO2006037403A1 (en) | 2006-04-13 |
| DE602005021386D1 (en) | 2010-07-01 |
| CN101035951B (en) | 2010-05-26 |
| AU2005291642A1 (en) | 2006-04-13 |
| EP1805374B1 (en) | 2010-05-19 |
| JP2008514411A (en) | 2008-05-08 |
| EP1805374A1 (en) | 2007-07-11 |
| ES2345990T3 (en) | 2010-10-07 |
| ATE468439T1 (en) | 2010-06-15 |
| GB0421841D0 (en) | 2004-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104961270B (en) | A kind of medicament vacuum method for handling engineering useless slurry | |
| CN107096637A (en) | A kind of simple and efficient sandstone screening plant | |
| CN102695551A (en) | Depositing and farming methods for drying oil sand mature fine tailings | |
| CN109336482A (en) | A kind of machine-made sand concrete and preparation method thereof | |
| CN101746942A (en) | Clear slurry dewatering and solidifying integrated treatment method | |
| Zhang et al. | Flocculation–solidification combined method for treatment of hydraulically dredged mud at extra high water content | |
| AU2022223257A1 (en) | Subterranean placement of lignocellulosic materials | |
| CN106939165A (en) | A kind of soil body curing agent and its preparation method and its gunnite method | |
| CN101035951B (en) | Method for de-watering a slurry | |
| CN1044359C (en) | Engrg. earth made from alkaline residue, making method and apparatus thereof | |
| Xu et al. | An improved method for dewatering sewage sludge using intermittent vacuum loading with wheat straw as vertical drains | |
| JP2001129507A (en) | Additive composition for underground water barrier wall and construction method for continuously integrated underground water barrier wall solid body | |
| CN100595390C (en) | River and pool back filling method by piling builders rubbish | |
| RU2395465C2 (en) | Polygon for processing sewage sludge | |
| CN113385516A (en) | Method and device for processing earthwork of refuse landfill | |
| CN1475633A (en) | Land making method using water way,harbour district dredge soil | |
| CN216126292U (en) | Landfill earthwork processing apparatus | |
| JP4680178B2 (en) | Method for dewatering slurry mixture from jet grout operation and aqueous suspension used therefor | |
| Kaiser et al. | A New Approach to Bauxite Residue Dry Stacking: Utilizing Ciba® RHEOMAX™ ETD Technology | |
| CN108212788A (en) | Simple and efficient sandstone screening plant | |
| CN1309910C (en) | Ready-mixed soil construction method and apparatus thereof | |
| GB2503456A (en) | A method of processing contaminated geological material | |
| CN1632288A (en) | Method of vulcanized slurry synchronous slip casting for subway shield | |
| KR19990030562A (en) | Compaction grouting method in oil-and-water using water-free separation material | |
| CN117105594A (en) | Efficient treatment method of engineering slurry |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20110824 |