CN102584165B - Curing agent for curing/stabilizing silt (sludge) and soft foundation, and application thereof - Google Patents
Curing agent for curing/stabilizing silt (sludge) and soft foundation, and application thereof Download PDFInfo
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- CN102584165B CN102584165B CN 201210038042 CN201210038042A CN102584165B CN 102584165 B CN102584165 B CN 102584165B CN 201210038042 CN201210038042 CN 201210038042 CN 201210038042 A CN201210038042 A CN 201210038042A CN 102584165 B CN102584165 B CN 102584165B
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Abstract
The invention relates to a curing agent for curing/stabilizing silt (sludge) and soft foundation, and the application thereof. The curing agent comprises 5-10 parts of cement clinker, 10-20 parts of aluminium hydroxide, 10-15 parts of quick lime, 1-5 parts of anhydrous gypsum, 50-60 parts of special rock ballast powder, 5-10 parts of sodium silicate, 0.1-3 parts of sodium fluosilicate, 1-3 parts of anionic polyacrylamide, 0.5-1.5 parts of sodium dodecyl benzene sulfonate and 0.3-1.0 part of carrageenan concentration powder; and the curing agent prepared by the components has the pH value of 8-9 and the particle size of 0.005-0.15mm. 5-10% of curing agent is evenly mixed with silt (sludge), and after treatment, the compression strength reaches 0.2-0.4MPa and the compression strength of seven days reaches 0.9-1.85MPa, so that the curing agent has the characteristics of excellent waterproof property, water stability and hydraulicity, and can be widely applied to the curing process for a sea reclamation intertidal zone, the curing process for the sludge generated by riverway dredging, the curing and stabilizing treatment for the sludge generated in a sewage treatment plant, the strengthening for the soil of a road soft foundation layer, and the leakage-proof treatment for a mud layer at the bottom of water in a river and a lake.
Description
Technical field
The invention belongs to city's environment-friendly engineering technical field of having stable political situation, relate to the solidifying agent of silt (dirt) mud and soft basic curing/stabilizing, a kind of solidifying agent and application thereof that makes silt mud and soft basic solidification and stabilization of saying so more specifically.
Background technology
Because weather and address motion are constantly changed, tiny rock and soil particle are under the effect of river and coastal morning and evening tides, the precipitation of can depositing in unhurried current areas such as river course bank, Haikou, reservoir, lakes forms soft layer, also the life of upstream and industrial pollutants are carried simultaneously and be mingled with wherein, form wet soft silt seam.This soft layer has generally that particle is thin, organic content is high, water content is high and is difficult for characteristics such as precipitation, causes the bearing capacity of soft layer low, the porosity height, and carrying back sedimentation is big, is difficult to directly use as building lot.
Along with the fast development of economic construction, industrial pollution, domestic pollution have produced the mud of flood tide to the city, will drop into the processing that huge fund is carried out mud in each city.Mud is stacked and is taken up an area of the problem that can produce Pollutants Diffusion and destroy water surrounding on the one hand, construction land has heavy demand to the earthwork on the other hand, cut into a mountain for quarrying, dig the river and adopt sand and can produce the destruction that is difficult to repair to resource, ecology and environment, so such demand becomes increasingly conspicuous with contradiction between the pollution.For this reason, carry out a large amount of weak native fixed research both at home and abroad, the soft soil foundation vacuum preloading precipitation method of (dirt) mud that wherein becomes silted up, extracted the Application Areas that precipitation is dried many aspects such as method and solidifying agent be fixed and obtained better result.
There is the problem of the bearing capacity lower (0.01-0.06Mpa) behind construction period long (5-10 month) and the ground precipitation in empty precompressed technology; Precipitation is dried method, can bring more trouble one be need be bigger the stacking place, the 2nd, the process of pump drainage causes pollution and the secondary environmental pollution of air, is exactly that mud behind the precipitation is wanted strange land roping, landfill to appoint might to pollute environmental problem in addition; Using the fixed weak soil of solidifying agent is the most rising technology.
At mud and soft based process field the experience in 50 years is arranged abroad, the deep-mixed pile technology of China is carried out early, it is own through obtaining large-scale application that technique of soft soil foundation treatment and extraction precipitation are dried technology, but also fall behind aspect the in-situ stabilized processing of mud and soft basis abroad more than at least 20 years, flourishing states such as Europe, the U.S., Japan and Russia take its place in the front ranks of the world.The plate body stabilization technique of Finland ALLU company and German KELLER company is domestic, and oneself attempts doing to introduce.At present the sludge curing agent that adopts mainly be cement, lime and slag class etc., every cube of volume is at the 120-400 kilogram.Handle soft soil foundations such as mud with solidifying agent, the mode that generally adopts is that cement class inorganic materials is stirred with mud both at home and abroad, carries out then that roping paves or preloading is fixed.The addition content when but cement class material is used for silt consolidation is bigger, adopts cement fixed high-moisture percentage (90-1500%) mud and gyttja, and its addition content scope is between 12-30%, and the unconfined compression strength of fixed mud after 28 days only is 0.1-0.6Mpa.Domestic sludge solidification adopts a large amount of inorganic materials of admixture such as flyash, lime, slag, slag etc. in addition, and its admixture quantity is up to 25%-60%.Because these material source inconvenience, traffic capacity are big, be difficult to large scale application.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide that few, the weak native precipitation of a kind of addition content is fast, bearing capacity is high, the good solidifying agent of induration soaking-resistant, solve existing (dirt) mud curing technology that becomes silted up and have that the induration bearing capacity is low, the sludge dewatering time long, the shortcoming of solidifying agent rear stability difference.
The invention provides following technical scheme for achieving the above object:
The solidifying agent of a kind of silt (dirt) mud and soft basic curing/stabilizing is characterized in that this solidifying agent is pulvis, is made up of cement, unslaked lime, special ballast powder, flocculation powder, water-retaining agent etc.; More concrete solidifying agent is made up of the raw material of following weight mark ratio:
Cement clinker 5-10 part, aluminium hydroxide 10-20 part, unslaked lime 10-15 part, dehydrated gyp-1-5 part, special ballast powder 50-60 part, water glass 5-10 part, Sodium Silicofluoride 0.1-3 part, anionic polyacrylamide 1-3 part, Sodium dodecylbenzene sulfonate 0.5-1.5 part, carrageenin concentrates powder 0.3-1.0 part; Wherein said special ballast powder refers to: the ballast powder raw material are carried out after preheating and part decompose through preheater, the employing rotary kiln carries out heat exchange and grog is fired, along with the ballast powder temperature of charge raises, ballast powder can become liquid phase, after grog burns till, temperature begins to reduce, and finally by chamotte cooler high temperature chamotte is cooled to downstream conveyor belt and grinds and make.
The invention discloses the preparation method of solidifying agent, it is characterized in that:
(1) earlier ballast powder grog and unslaked lime are ground to particle diameter and reach the 140-200 order;
(2) to concentrate the required batching of powder even with ground special ballast powder and unslaked lime in proportion for cement clinker, aluminium hydroxide, dehydrated gyp-, water glass, Sodium Silicofluoride, anionic polyacrylamide, Sodium dodecylbenzene sulfonate, carrageenin, and combined grinding is to Blain specific surface 300-700m
2/ kg makes pH value 8-9, and particle diameter is the powdery solidifying agent of 0.005-0.15mm.
The preparation method of the further disclosed solidifying agent of the present invention is as follows:
After preheater carried out preheating and part decomposition, the employing rotary kiln carries out heat exchange and grog is fired with special ballast powder raw material, and along with the ballast powder temperature of charge raises, ballast powder can become liquid phase, and after grog burnt till, temperature began to reduce.Finally by chamotte cooler high temperature chamotte being cooled to downstream conveyor belt grinds, simultaneously unslaked lime is ground to powdery synchronously, particle diameter reaches about the 140-200 order, at last cement clinker, aluminium hydroxide, dehydrated gyp-, water glass, Sodium Silicofluoride, anionic polyacrylamide, Sodium dodecylbenzene sulfonate, carrageenin are concentrated required batching such as powder even mix in proportion, combined grinding is to Blain specific surface 300-700m
2/ kg, the pack of qualified back is dispatched from the factory, and the finished product solidifying agent is canescence or lurid meal, and about pH value 8-9, particle diameter is 0.005-0.15.
Solidifying agent action principle of the present invention is as follows: the pulvis main component is passed through hydration reaction; the formed crystal water absorption portion of Dicalcium Phosphate (Feed Grade) and tricalcium silicate and ettringite moisture; formed acicular crystals is filled the space; the pozzolanic reaction of the special rock ballast of active inorganic materials and form crystallization and skeleton by them; be conducive to discharge moisture in soft soil foundation as passage early stage; later stage is as skeleton; be conducive to increase concretion body strength; the powdered polypropylene acid amides effectively absorbs the large quantity of moisture in the mud; and flocculation and granuleization rapidly; make the fine particle alligatoring, improve permeability coefficient and dewatering speed.Can destroy microorganism cells structure in the mud for this solidifying agent of mud, impel the release of water in the born of the same parents, and by series of complex physico-chemical (as hydration reaction), poisonous and hazardous material is fixed in the network chain (lattice) that solidify to form, make it change into similar soil or the very big solid of consolidation strength, thereby reduce the water-absorbent of mud, the process of accelerate sludge dehydration.The pH value of this solidifying agent is 8-9, belongs to meta-alkalescence, can kill pathogenic bacteria in the mud, bacterium etc., further realizes the innoxious of mud.
According to different application project designs and the requirement for bearing capacity of practical basis, determine concrete usage ratio, in general water content is at the stable month 5-8% that uses of the curing of the silt below 200% (dirt) mud, and every cube of volume is 70-120kg.Water content height then volume is more high, and requirement for bearing capacity height then addition content is more high, and then addition content is more high for the organic content height in the mud, requires set time short volume more high.Use solidifying agent of the present invention after 1 hour ultimate compression strength can reach about 0.2Mpa, water content can be down to rapidly below 95%, unconfined compression strength after 7 days can reach 0.90-1.85Mpa, and has the characteristics of superior water-repellancy, water stability and the hydraulicity.Especially pollutents such as contained heavy metal, pathogenic agent have been significantly reduced its rate of release by after fixed, the sealing in the mud, after testing, the favorable environment protection energy are arranged.After tested can be anti-long-term seawater and the immersion of fresh water and pollutent can not occur leaching, and can keep stronger bearing capacity.
The present invention further discloses solidifying agent and be coated with solidification treatment in preparation as enclosing the seabeach, the channel cleanout sludge solidification is handled, the sludge of sewage treatment plant solidification and stabilization is handled, the application of the solidifying agent aspect that the soil reinforcement of highway soft foundation layer and river, water body in lake bottom mud layer antiseep are handled.Wherein solidifying agent is according to handling the object difference, and its usage quantity is generally 5%-10.
The positively effect that solidifying agent of the present invention compared with prior art has:
(1) this solidifying agent preparation method is simple, and solidification effect is remarkable, and the scope of application is extensive, compliance with environmental protection requirements.
(2) this solidifying agent can be widely used in and enclose the solidification treatment that the seabeach is coated with, the channel cleanout sludge solidification is handled, the sludge of sewage treatment plant solidification and stabilization is handled, and the antiseep of the reinforcement of highway soft foundation layer soil and river, water body in lake bottom mud layer is handled, and hardener dose is generally 5%-10%.
(3) this solidifying agent cost of manufacture is lower, and the addition content when carrying out weak native consolidation process simultaneously is few, and concretion body strength height, soaking-resistant are good.Can be widely used in the solidification treatment of desilting, the antiseep of the reinforcement of highway soft foundation layer soil and river, water body in lake bottom mud layer is handled, and encloses the sea, builds the island, folded dam, fixed landfill, speedily carries out rescue work and soft layer stabilization treatment etc.This solidifying agent is environmental protection, high efficiency products, will produce bigger economic benefit and good social benefit.
Embodiment
The using method of the solidifying agent of the present invention's silt (dirt) mud and soft basic curing/stabilizing.But present embodiment is not limited to the present invention, and every employing similar composition of the present invention and similar variation thereof all should be listed protection scope of the present invention in.What be illustrated especially is cement clinker, aluminium hydroxide, and unslaked lime, dehydrated gyp-, water glass, Sodium Silicofluoride, anionic polyacrylamide, Sodium dodecylbenzene sulfonate, concentrated each composition of powder of carrageenin is market and easily purchases material.
Embodiment 1
5 parts of cement clinkers, 10 parts in aluminium hydroxide, 10 parts of unslaked limes, 1 part of dehydrated gyp-, 50 parts of special ballast powders, 10 parts of water glass, 0.1 part of Sodium Silicofluoride, 1 part of anionic polyacrylamide, 1.5 parts of Sodium dodecylbenzene sulfonatees, carrageenin concentrates 1.0 parts in powder; The wherein preparation of special ballast powder:
Prepare the raw material of special ballast powder after preheater carries out preheating and part decomposition with being used for, adopt rotary kiln to carry out heat exchange and fire grog, along with temperature raises, rock ballast powder mineral can become liquid phase, after grog burns till, temperature begins to reduce, and finally by chamotte cooler high temperature chamotte is cooled to downstream conveyor belt and grinds and make, and the preparation method adopts conventional new type nonaqueous cement rotary kiln production technique.
The preparation method of solidifying agent:
(1) earlier ballast powder grog and unslaked lime are ground to particle diameter and reach 140 orders;
(2) cement clinker, aluminium hydroxide, dehydrated gyp-, water glass, Sodium Silicofluoride, anionic polyacrylamide, Sodium dodecylbenzene sulfonate, carrageenin are concentrated powder etc. according to the above ratio with ground special ballast powder and the even mix of unslaked lime, combined grinding is to Blain specific surface 300m
2/ kg makes pH value 8, and particle diameter is the powdery solidifying agent of 0.015mm.
Embodiment 2
10 parts of cement clinkers, 20 parts in aluminium hydroxide, 10 parts of unslaked limes, 5 parts of dehydrated gyp-s, 60 parts of special ballast powders, 5 parts of water glass, 3 parts of Sodium Silicofluorides, 3 parts of anionic polyacrylamides, 1.5 parts of Sodium dodecylbenzene sulfonatees, carrageenin concentrates 0.3 part in powder; The preparation method of wherein said special ballast powder is with embodiment 1.
The preparation method of solidifying agent:
(1) earlier ballast powder grog and unslaked lime are ground to particle diameter and reach 200 orders;
(2) cement clinker, aluminium hydroxide, dehydrated gyp-, water glass, Sodium Silicofluoride, anionic polyacrylamide, Sodium dodecylbenzene sulfonate, carrageenin are concentrated powder etc. according to the above ratio with ground special ballast powder and the even mix of unslaked lime, combined grinding is to Blain specific surface 700m
2/ kg makes pH value 8.5, and particle diameter is the powdery solidifying agent of 0.010mm.
Embodiment 3
8 parts of cement clinkers, 15 parts in aluminium hydroxide, 10 parts of unslaked limes, 3 parts of dehydrated gyp-s, 55 parts of special ballast powders, 10 parts of water glass, 2 parts of Sodium Silicofluorides, 1.5 parts of anionic polyacrylamides, 1.5 parts of Sodium dodecylbenzene sulfonatees, carrageenin concentrates 0.8 part in powder;
The preparation of wherein said special ballast powder is with embodiment 1.
The preparation method of solidifying agent:
(1) earlier ballast powder grog unslaked lime is ground to particle diameter and reaches 150 orders;
(2) cement clinker, aluminium hydroxide, dehydrated gyp-, water glass, Sodium Silicofluoride, anionic polyacrylamide, Sodium dodecylbenzene sulfonate, carrageenin are concentrated powder etc. according to the above ratio with ground special ballast powder and the even mix of unslaked lime, combined grinding is to Blain specific surface 700m
2/ kg, pH value about 9, particle diameter is 0.115 powdery solidifying agent.
The example of practical application
Application Example 1
On December 27th, 2010 was got highway section, Xintian County mud, and the mix ratio that uses stabilizing and curing agent of the present invention and mud is 8%, added 96 these solidifying agent of kg in 1 cubic metre of mud, was spiked in the mud to mix, and stablized consolidation test.Get mixed mud in the laboratory, each 6 of 3 groups of the test blocks of making diameter 50mm size are totally 18 test specimens, the mud test block is placed in the mould placed 1 day, and the room temperature health is 6 days after the demoulding, soak 1 day, carries out unconfined compression strength mensuration again.Detected result be 7d not have lateral confinement intensity be 1.15-1.78 Mpa, the requirement of strength of meeting tier 2 road, city subsidiary road subbase fully.
Application Example 2
On June 10th, 2011, use solidifying agent of the present invention that the contaminated soil in chemical plant, Dalian is carried out in-situ stabilized consolidation test, this factory's mud has 4 types, wherein there is water content to surpass 300% full pigment coal ash, water content and surpasses 200% alkaline residue, water content at the serious pollution mud more than 200%, the water content slight pollution mud ooze about 200%, (dirt) the mud degree of depth of becoming silted up is the darkest to be 4 meters, average 2.5 meters, carried out respectively solidifying back 2 hours and 24 hours and 168 hours test and observation.Using dosage is respectively 10%, 12%, 10%, 8%, except alkaline residue, other mud, mud is anhydrous mark after stablizing 2 hours, 28 tons of track type digging machines can operation under the state of chock plate, can satisfy 3 tons of wheeled tractor operations after 24 hours, and the alkaline residue that water content is bigger can be gone up the wheel machine operation after 48 hours, ran in 72 hours and rain heavily, ponding does not down ooze, and the dregs car of 50 tons of gross weights can pass through after 168 hours, does not ftracture and do not sink in the road surface.
Application Example 3
In the artificial wetland engineering in Tianjin, using solidifying agent of the present invention that antiseepage is done in the wetland bottom handles, during construction, earlier the wetland lower soil is carried out compacting operation, after solidifying agent is carried out mix in 10% ratio and clay, and sprinkling amount of water, approximately greater than the 1-2% of soil optimum moisture content, composite soil is paved evenly subsequently, adopt two roller street rollers of 8 tons to carry out roller-compaction, health was used the infiltration detector to carry out on-the-spot multiple spot and is detected after 7 days, average seepage rate is 1.0ml/min, belongs to closely knit waterproof.
Claims (3)
1. the solidifying agent of a mud, mud and soft basic curing/stabilizing is characterized in that described solidifying agent is made up of the raw material of following portions by weight ratio:
Cement clinker 5-10 part, aluminium hydroxide 10-20 part, unslaked lime 10-15 part, dehydrated gyp-1-5 part, special ballast powder 50-60 part, water glass 5-10 part, Sodium Silicofluoride 0.1-3 part, anionic polyacrylamide 1-3 part, Sodium dodecylbenzene sulfonate 0.5-1.5 part, carrageenin concentrates powder 0.3-1.0 part; Wherein said special ballast powder refers to: the ballast powder raw material are carried out after preheating and part decompose through preheater, the employing rotary kiln carries out heat exchange and grog is fired, along with the ballast powder temperature of charge raises, ballast powder can become liquid phase, after grog burns till, temperature begins to reduce, and finally by chamotte cooler high temperature chamotte is cooled to downstream conveyor belt and grinds and make; The preparation method of solidifying agent: (1) is ground to particle diameter with special ballast powder and unslaked lime and reaches the 140-200 order; (2) cement clinker, aluminium hydroxide, dehydrated gyp-, water glass, Sodium Silicofluoride, anionic polyacrylamide, Sodium dodecylbenzene sulfonate, carrageenin concentrate powder in proportion with ground special ballast powder and the even mix of unslaked lime, combined grinding is to Blain specific surface 300-700m
2/ kg makes pH value 8-9, and particle diameter is the powdery solidifying agent of 0.005-0.15mm.
2. the described solidifying agent of claim 1 is coated with solidification treatment in preparation as enclosing the seabeach, the channel cleanout sludge solidification is handled, the sludge of sewage treatment plant solidification and stabilization is handled, the application of the solidifying agent aspect that the soil reinforcement of highway soft foundation layer and river, water body in lake bottom mud layer antiseep are handled.
3. the described application of claim 2, wherein solidifying agent is according to handling the object difference, and its usage quantity is generally 5%-10%.
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| CN102807360B (en) * | 2012-08-28 | 2014-05-14 | 苏州伟宇天诚环保科技有限公司 | Preparation of ceramic particle by adopting calcium fluoride sludge |
| CN103787624A (en) * | 2014-02-15 | 2014-05-14 | 江苏坤泽科技股份有限公司 | Environment-friendly type steel slag based sludge curing agent |
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| CN107500626A (en) * | 2017-08-29 | 2017-12-22 | 招商局蛇口工业区控股股份有限公司 | The preparation method of mud mixing pile |
| CN109384447B (en) * | 2018-12-06 | 2020-11-20 | 中国矿业大学 | Powder curing agent for temporary road base in open-pit coal mine pit and use method thereof |
| CN111333379B (en) * | 2019-12-20 | 2021-09-03 | 湖北久树环境科技有限公司 | Repairing agent for channel ecological remediation engineering |
| CN111393092B (en) * | 2020-03-25 | 2020-12-15 | 江苏坤泽科技股份有限公司 | Low-gel-material high-impermeability sea sand solidified soil for hydraulic reclamation and preparation method thereof |
| CN112390483A (en) * | 2020-11-24 | 2021-02-23 | 肇庆市武大环境技术研究院 | Efficient solidification method for heavy metal nickel in sludge |
| CN114477933B (en) * | 2022-02-14 | 2022-09-09 | 西安市政设计研究院有限公司 | Compound additive for heavy-wet soft roadbed and pipeline foundation |
| CN115650690A (en) * | 2022-09-06 | 2023-01-31 | 南京理工大学 | Novel composite polymer shield muck curing agent |
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