CN115583817A - Organic-inorganic hybrid consolidation method and composition for seabed sludge - Google Patents
Organic-inorganic hybrid consolidation method and composition for seabed sludge Download PDFInfo
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- CN115583817A CN115583817A CN202211048680.5A CN202211048680A CN115583817A CN 115583817 A CN115583817 A CN 115583817A CN 202211048680 A CN202211048680 A CN 202211048680A CN 115583817 A CN115583817 A CN 115583817A
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- 239000010802 sludge Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000000203 mixture Substances 0.000 title claims abstract description 24
- 238000007596 consolidation process Methods 0.000 title claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 69
- 229920000642 polymer Polymers 0.000 claims abstract description 39
- 235000014653 Carica parviflora Nutrition 0.000 claims abstract description 29
- 239000002245 particle Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000002250 absorbent Substances 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 229920005989 resin Polymers 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 17
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 13
- 150000003839 salts Chemical class 0.000 claims abstract description 13
- 239000002910 solid waste Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910003480 inorganic solid Inorganic materials 0.000 claims abstract description 9
- 241000243321 Cnidaria Species 0.000 claims abstract 10
- 238000002485 combustion reaction Methods 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 24
- 239000003245 coal Substances 0.000 claims description 22
- 230000002269 spontaneous effect Effects 0.000 claims description 22
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 14
- 230000002745 absorbent Effects 0.000 claims description 12
- 239000002956 ash Substances 0.000 claims description 12
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 11
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 11
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 11
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 11
- 239000012190 activator Substances 0.000 claims description 8
- 150000004676 glycans Chemical class 0.000 claims description 8
- 229920002401 polyacrylamide Polymers 0.000 claims description 8
- 229920001282 polysaccharide Polymers 0.000 claims description 8
- 239000005017 polysaccharide Substances 0.000 claims description 8
- 239000000839 emulsion Substances 0.000 claims description 7
- 239000000178 monomer Substances 0.000 claims description 7
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 7
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 7
- 230000007774 longterm Effects 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 5
- 239000010883 coal ash Substances 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000011257 shell material Substances 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- 235000015170 shellfish Nutrition 0.000 claims description 2
- 239000001488 sodium phosphate Substances 0.000 claims description 2
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical group [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 2
- 239000004115 Sodium Silicate Substances 0.000 claims 1
- 229910052911 sodium silicate Inorganic materials 0.000 claims 1
- 239000004480 active ingredient Substances 0.000 abstract description 5
- 239000013535 sea water Substances 0.000 abstract description 5
- 230000009471 action Effects 0.000 abstract description 4
- 239000011147 inorganic material Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 239000011368 organic material Substances 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract description 2
- 239000004615 ingredient Substances 0.000 abstract description 2
- 244000132059 Carica parviflora Species 0.000 description 19
- 230000000694 effects Effects 0.000 description 11
- 238000009991 scouring Methods 0.000 description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 238000005056 compaction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000004746 geotextile Substances 0.000 description 3
- 239000011664 nicotinic acid Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000009396 hybridization Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012213 gelatinous substance Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
-
- 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
- C04B28/006—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 containing mineral polymers, e.g. geopolymers of the Davidovits type
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
Landscapes
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Engineering & Computer Science (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a method and a composition for consolidating organic-inorganic hybrid seabed sludge, which are characterized in that the following material components are added into the taken seabed water-containing sludge: the inorganic solid waste powder comprises inorganic solid waste powder, coral aggregate, an exciting agent and an organic component, wherein the exciting agent comprises an alkaline exciting agent and a salt exciting agent, and the organic component comprises a silane coupling agent, a water-absorbent resin and a polymer. The invention can fully utilize the active ingredients of the seabed sludge, so that the active ingredients and the doped inorganic powder material generate gel substances under the action of the excitant, sludge particles can be consolidated together, organic ingredients are doped at the same time, the consolidation of the sludge and the inorganic powder material is promoted, and the chemical reaction between the inorganic and organic materials is carried out to enhance the integrity. The doped organic components can also ensure that the mixture does not collapse in the process of pouring in seawater until enough strength is generated so that the hardened composite material has better mechanical property and durability.
Description
Technical Field
The invention belongs to the cross field of civil engineering materials and geotechnical engineering, and relates to a method and a composition for efficiently consolidating seabed sludge through organic-inorganic hybridization.
Background
Because of the shortage of energy resources and the increasing environmental pollution, efforts are being made to develop new green and environmental-friendly energy resources worldwide. Offshore wind power projects are produced at the same time and are in a vigorous development stage at present. With the increase of the time for commissioning the offshore wind power engineering project, the problem that the foundation of the wind turbine pile is seriously washed occurs. Under the effect of seabed gushing current, near pile foundation forms the vortex, makes silt around the stake washed away, can lead to near the scouring depth of stake to reach several meters when serious, and stake upper portion still can receive the effect of wave simultaneously, and this stability that will seriously influence the wind-powered electricity generation pile foundation. At present, the following measures are commonly used in engineering to prevent or slow down the influence of scouring on the safety of a pile foundation: (1) Riprap (including sand bags, riprap, precast concrete members, etc.); (2) Geotextile compaction (sand quilt, geotextile compaction, interlocking blocks and the like); (3) bionic aquatic weed treatment; and (4) reserving the flushing length and the like. However, the methods have limitations, and the riprap method is suitable for sea areas with clear seawater quality, otherwise, the riprap precision can be influenced, and the erosion-resistant effect is reduced; the geotextile compaction method has poor long-term anti-scouring effect, and silt has loss risk under the repeated scouring of wave current; the bionic aquatic weed control method is used for sea areas with high sea current velocity and small sediment particle size, and has poor effect, so that the bionic grass area which is effectively deposited and covered cannot be formed; the method for reserving the scouring length needs to increase the length of the steel pile, so that the cost is greatly increased, and a submarine cable introduced into a fan along with the steel pile cannot be fixed, so that a fixed pile needs to be additionally designed for anchoring, and the method is less in application to offshore wind power engineering. Therefore, a measure for effectively preventing the scouring of the sludge of the wind power foundation is urgently needed, the stability of the wind power foundation is improved, and the sustainable development of the offshore wind power project is promoted.
Disclosure of Invention
The invention aims to maintain the stability of the seabed sludge near the wind power pile foundation under the action of seabed inrush current and other forces, prevent the seabed sludge from being washed away by eddy currents, and combine the self property and the environment condition of the seabed sludge, and provides an organic-inorganic hybrid method for consolidating the seabed sludge.
In order to achieve the above object, according to a first aspect of the present invention, the technical solution of the present invention is as follows:
the method for consolidating the seabed sludge by organic-inorganic hybrid is characterized in that the following material components are added into the taken seabed water-containing sludge: the inorganic solid waste powder comprises inorganic solid waste powder, coral aggregate, an exciting agent and an organic component, wherein the exciting agent comprises an alkaline exciting agent and a salt exciting agent, and the organic component comprises a silane coupling agent, a water-absorbent resin and a polymer.
In a preferred embodiment, the inorganic solid waste powder comprises spontaneous combustion gangue powder, coal dust and shell powder.
As a preferred embodiment, the coral aggregates may be subjected to an acid treatment by a method using a weak acid such as acetic acid or phosphoric acid.
As a preferred embodiment, the added parts of the material components per cubic meter of the seafloor aqueous sludge are:
12-35kg of spontaneous combustion gangue powder;
8-21kg of coal mud ash;
3-9kg of shell powder;
100-300kg of coral aggregates;
1-5kg of excitant;
2-7kg of organic components.
The organic components are silane coupling agent, super absorbent resin and polymer, and the following selection modes can be adopted according to the basic performances of the seabed sludge such as chemical composition, water content and the like: the super absorbent resin mainly reduces the water content in the sludge extracted from the seabed, promotes the coagulation and hardening of the externally doped inorganic gelled material, and improves the integral anti-scouring and mechanical properties, and the doping amount of the super absorbent resin is not only related to the self water absorption capacity of the super absorbent resin, but also has positive correlation with the water content of the sludge; the polymer mainly improves the dispersibility resistance of the sludge and the inorganic cementing material, prevents the treated sludge from seriously collapsing when being pumped back to the seabed, and influences the later mechanical property and the scouring resistance, and the mixing amount of the polymer is mainly based on the dispersibility resistance required by a sludge solidification body; the silane coupling agent promotes the associativity between organic matters and inorganic materials, improves the integrity and the anti-scouring performance of the treated sludge, and the doping amount of the silane coupling agent is in positive correlation with the doping amount of the polymer.
The quality tolerance of the raw materials is as follows: spontaneous combustion gangue powder: plus or minus 1 percent; coal sludge ash: plus or minus 1 percent; shell powder: plus or minus 1 percent; coral aggregate: plus or minus 3 percent; exciting agent: plus or minus 0.5 percent; an organic component; plus or minus 0.5 percent.
In a preferred embodiment, the addition ratio of the alkaline excitant to the salt excitant is 7:1-5:1.
As a preferred embodiment, the alkali-activator is sodium water glass (Na) having a modulus of 1.8 2 O·nSiO 2 ) The salt activator is sodium phosphate (Na) 3 PO 4 )。
In a preferred embodiment, the polymer comprises one or more of PVA powder, acrylic emulsion, acrylic monomer, styrene-butadiene rubber, chloroprene rubber, carboxymethyl cellulose, polyacrylamide polymer, and polysaccharide polymer.
As a preferred embodiment, the spontaneous combustion coal gangue powder is powder with small internal carbon and sulfur contents and less than 3.5% of total amount of free calcium oxide and magnesium oxide after long-term spontaneous combustion of spontaneous combustion coal gangue, and the particle size is 2000-4000 meshes after crushing and grinding; the coal ash is solid waste with uneven combustion degree generated by a heating process of a winery, and the particle size is 400-1000 meshes; the shell powder is powder formed by grinding shells of marine shellfish, and has a particle size of 1000-2000 meshes; the coral aggregate is prepared by simply crushing and acid treating the sea coral to obtain the coral aggregate with the particle size of less than 30mm, wherein the coral aggregate is 30% with the particle size of less than 5mm, 40% with the particle size of 5-less than 15mm and 30% with the particle size of 15-less than 30 mm.
The basic properties of the raw materials used are given in the table below
As a preferred embodiment, the construction method of the organic-inorganic hybrid consolidated seabed sludge comprises the following steps:
firstly, pumping seabed sludge in a range to be treated into a sampling ship, and uniformly stirring the seabed sludge and inorganic powder materials together, wherein the inorganic powder materials comprise spontaneous combustion coal gangue powder, shell powder and coal slime ash;
secondly, adding the coral aggregate into the slurry prepared by the stirring in the first step, and continuously stirring uniformly;
thirdly, adding the excitant, the curing agent and the super absorbent resin into the mixture obtained by stirring in the second step, and uniformly stirring;
fourthly, adding the polymer into the mixture prepared by stirring in the third step, and continuously stirring uniformly;
and fifthly, pouring the mixture prepared by stirring in the fourth step into an original sludge extraction area of the seabed by adopting a conduit method. And sampling by a coring method when the concrete is poured for 60 days, and testing the mechanical related performance of the consolidation body.
As a preferred embodiment, the polymer comprises 2-3 of PVA powder, acrylic emulsion, acrylic monomer, styrene-butadiene rubber and chloroprene rubber, and 2-3 of carboxymethyl cellulose, polyacrylamide polymer and polysaccharide polymer
In order to achieve the above object, according to a second aspect of the present invention, the technical solution of the present invention is as follows:
an organic-inorganic hybrid consolidated seabed sludge composition is characterized by comprising spontaneous combustion gangue powder, coal ash, shell powder, coral aggregate, an excitant and organic components, wherein the excitant comprises an alkaline excitant and a salt excitant, and the organic components comprise a silane coupling agent, a water-absorbent resin and a polymer, wherein:
12-35 parts of spontaneous combustion gangue powder; 8-21 parts of coal mud ash; 3-9 parts of shell powder; 100-300 parts of coral aggregate; 1-5 parts of an excitant; 2-7 parts of organic components.
According to the invention, an organic-inorganic hybrid method is adopted to consolidate the seabed sludge, inorganic solid waste powder (spontaneous combustion coal gangue powder, coal sludge ash and shell powder) is doped into the high-water-content sludge taken out from the seabed, and an activator (an alkaline activator and a salt activator) is doped to ensure that the active ingredients in the seabed sludge and the solid waste powder are subjected to chemical reaction to generate a gelatinous substance so as to achieve the effect of solidifying sludge particles; the coral aggregates doped with the acid treatment can fully utilize the adsorption effect of pores on the surfaces of the coral aggregates, absorb moisture in the mixture to increase the consistency of the mixture, and the surface roughness of the coral aggregates is higher, thereby being beneficial to increasing the physical effect between the aggregates and the slurry of the mixture; the super absorbent resin is added for further absorbing the moisture in the mixture and improving the consistency of the mixture; the silane coupling agent is doped to play a role in bridging, so that the integrity between inorganic and organic materials is promoted, and the consolidation effect on sludge is further improved; the carboxymethyl cellulose, the polyacrylamide polymer and the polysaccharide polymer are doped to have flocculation effect, so that the mixture is prevented from collapsing in the underwater pouring process.
In summary, the invention designs an organic-inorganic hybrid high-efficiency consolidation method for seabed sludge, which can fully utilize the active ingredients of the seabed sludge, so that the active ingredients and the externally-doped inorganic powder material generate gel substances under the action of an exciting agent, sludge particles can be consolidated together, organic ingredients are doped at the same time, the consolidation of the sludge and the inorganic powder material is promoted, and the inorganic and organic materials are subjected to chemical reaction to enhance the integrity. In addition, the mixed organic components can also ensure that the mixture does not collapse in the process of pouring in seawater until enough strength is generated, so that the hardened composite material has better mechanical property and durability. The method has a good consolidation effect on the seabed sludge, is environment-friendly and low-carbon, and has remarkable innovation significance and engineering application prospect. The method has important significance for improving the stability of the offshore wind power pile foundation and promoting the continuous development of offshore wind power projects.
Detailed Description
The invention is further illustrated below with reference to specific embodiments:
the first embodiment is as follows: the sludge sample is taken from the periphery of a pile foundation of an offshore wind power project in a certain sea area, the water content of the sludge is about 98 percent, the content of organic matters is 1.9 percent, and the main component is SiO 2 、Al 2 O 3 And CaCO 3 And the like, namely the silt silty clay. The method is characterized in that an alkaline activator is selected as a main material to excite internal active siliceous minerals and aluminum minerals, and spontaneous combustion gangue powder, coal slime powder and shell powder with high activity are supplemented to promote the solidification of sludge particles. The super absorbent resin is used for reducing the moisture in the sludge, and is used together with the polymer, so that the anti-dispersion property and the integrity of the sludge consolidation body are improved, the silane coupling agent promotes the combination between organic and inorganic substances, and the integrity and the mechanical property of the sludge consolidation body are further improved.
The other components and the dosage required to be doped in each cubic meter of the seabed sludge are as follows:
18kg of spontaneous combustion gangue powder;
10kg of coal slime ash;
3.5kg of shell powder;
290kg of coral aggregates;
2kg of excitant (1.7 kg of alkaline excitant, 0.3kg of salt excitant);
3kg of organic components (0.3 kg of silane coupling agent, 0.2kg of super absorbent resin, 1.5kg of polymer A (any 2-3 of PVA powder, acrylic emulsion, acrylic monomer, styrene-butadiene rubber, chloroprene rubber and carboxymethyl cellulose), and 1kg of polymer B (any 2-3 of carboxymethyl cellulose, polyacrylamide type polymer and polysaccharide type polymer).
Example two: the sludge sample is taken from the periphery of a pile foundation of an offshore wind power project in a certain sea area, the water content of the sludge is about 102 percent, the content of organic matters is about 1.5 percent, and the main component is SiO 2 、Al 2 O 3 And CaCO 3 And the other raw material selection reasons are consistent with the embodiment, and the adjustment is carried out according to the content difference of the activated siliceous minerals and the aluminous minerals and the thickness difference of the sludge particles.
The other components and the dosage required to be doped in each cubic meter of the seabed sludge are as follows:
24kg of spontaneous combustion gangue powder;
9kg of coal mud ash;
8kg of shell powder;
188kg of coral aggregates;
3.2kg of excitant (2.7 kg of alkaline excitant, 0.5kg of salt excitant);
3.6kg of organic components (0.35 kg of silane coupling agent, 0.3kg of super absorbent resin, 1.9kg of polymer A (any 2-3 of PVA powder, acrylic emulsion, acrylic monomer, styrene-butadiene rubber, chloroprene rubber and carboxymethyl cellulose), and 0.95kg of polymer B (any 2-3 of carboxymethyl cellulose, polyacrylamide type polymer and polysaccharide type polymer).
Example three: the sludge sample is taken from the periphery of a pile foundation of an offshore wind power project in a certain sea area, the water content of the sludge is about 120 percent, the content of organic matters is about 2.2 percent, and the main component is SiO 2 、Al 2 O 3 And CaCO 3 And the powder sand is mixed with more auxiliary powdery materials, the coral aggregates are also mixed with more auxiliary powdery materials, other raw material selection reasons are consistent with the embodiment, and the adjustment is carried out according to the content difference of the active siliceous minerals and the aluminous minerals and the thickness difference of the sludge particles.
The other components and the dosage required to be doped in each cubic meter of the seabed sludge are as follows:
35kg of spontaneous combustion coal gangue powder;
20kg of coal slime ash;
8kg of shell powder;
280kg of coral aggregates;
4kg of excitant (3.4 kg of alkaline excitant, 0.6kg of salt excitant);
3.9kg of organic components (0.35 kg of silane coupling agent, 0.4kg of super absorbent resin, 2.05kg of polymer A (2-3 of PVA powder, acrylic emulsion, acrylic monomer, styrene-butadiene rubber, chloroprene rubber and carboxymethyl cellulose), and 1.1kg of polymer B (2-3 of carboxymethyl cellulose, polyacrylamide polymer and polysaccharide polymer).
The construction method for consolidating the seabed sludge by organic-inorganic hybridization according to the three groups of cases comprises the following steps:
firstly, pumping the seabed sludge in a range to be treated into a sampling ship, and uniformly stirring the seabed sludge and an inorganic powder material;
secondly, adding the coral aggregate into the slurry prepared by the stirring in the first step, and continuously stirring uniformly;
thirdly, adding the excitant, the curing agent and the super absorbent resin into the mixture obtained by stirring in the second step, and uniformly stirring;
fourthly, adding the polymer into the mixture prepared by stirring in the third step, and continuously stirring uniformly;
and fifthly, pouring the mixture prepared by stirring in the fourth step into an original seabed sludge extraction area by adopting a conduit method.
The samples prepared according to the mixing proportion of the three groups of cases are used for respectively testing the compressive strength and the flexural strength by core drilling and sampling when the samples are maintained for 60 days in a seawater environment, the compressive strength reaches 0.5-3MPa, the flexural strength is 0.08-0.39MPa, the long-term scouring action of the surrounding seawater flow rate of more than 4m/s can be resisted, the stable existence of sludge around the wind power pile foundation can be ensured, and the long-term stability of the pile foundation can be ensured.
The embodiments described above are only some specific embodiments of the present invention, and are only some implementations based on the overall concept of the present invention, and are not intended to limit the scope of the present invention. Any modification, improvement or substitution made by those skilled in the art within the technical scope of the present invention shall be covered by the protection scope of the present invention.
Claims (10)
1. The method for consolidating the seabed sludge by organic-inorganic hybrid is characterized in that the following material components are added into the taken seabed water-containing sludge: the inorganic solid waste powder comprises inorganic solid waste powder, coral aggregate, an exciting agent and an organic component, wherein the exciting agent comprises an alkaline exciting agent and a salt exciting agent, and the organic component comprises a silane coupling agent, a water-absorbent resin and a polymer.
2. The method for organic-inorganic hybrid consolidation of seabed sludge as claimed in claim 1, wherein the inorganic solid waste powder comprises spontaneous combustion coal gangue powder, coal sludge ash and shell powder.
3. The method for consolidating seafloor sludge through organic-inorganic hybrid according to claim 1, wherein the addition of the material components per cubic meter of the seafloor sludge is as follows:
12-35kg of spontaneous combustion gangue powder;
8-21kg of coal mud ash;
3-9kg of shell powder;
100-300kg of coral aggregates;
1-5kg of excitant;
2-7kg of organic components.
4. The method for consolidating seafloor sludge according to claim 1, wherein the alkaline activator is sodium silicate with a modulus of 1.8, and the salt activator is sodium phosphate.
5. The method for consolidating seafloor sludge according to claim 1, wherein the adding ratio of the alkaline excitant to the salt excitant is 7:1-5:1.
6. The method of claim 1, wherein the polymer comprises one or more of PVA powder, acrylic emulsion, acrylic monomer, styrene-butadiene rubber, chloroprene rubber, carboxymethyl cellulose, polyacrylamide polymer, and polysaccharide polymer.
7. The method for consolidating the seabed sludge through organic-inorganic hybrid according to claim 2, wherein the spontaneous combustion coal gangue powder is powder with particle size of 2000-4000 meshes after the spontaneous combustion coal gangue is subjected to long-term spontaneous combustion, the total amount of free calcium oxide and magnesium oxide is less than 3.5 percent and the powder is crushed and ground; the coal ash is solid waste with uneven combustion degree generated by a heating process of a winery, and the particle size is 400-1000 meshes; the shell powder is powder formed by grinding shells of marine shellfish, and has a particle size of 1000-2000 meshes; the coral aggregate is prepared by simply crushing and acid treating the sea coral to obtain the coral aggregate with the particle size of less than 30mm, wherein the coral aggregate is 30% with the particle size of less than 5mm, 40% with the particle size of 5-less than 15mm and 30% with the particle size of 15-less than 30 mm.
8. The method for consolidating seabed sludge according to claim 1, wherein the construction method comprises the following steps:
firstly, pumping seabed sludge in a range to be treated into a sampling ship, and uniformly stirring the seabed sludge and inorganic powder materials, wherein the inorganic powder materials comprise spontaneous combustion coal gangue powder, shell powder and coal slime ash;
secondly, adding the coral aggregate into the slurry prepared by the stirring in the first step, and continuously stirring uniformly;
thirdly, adding the excitant, the curing agent and the super absorbent resin into the mixture obtained by stirring in the second step, and uniformly stirring;
fourthly, adding the polymer into the mixture prepared by stirring in the third step, and continuously stirring uniformly;
and fifthly, pouring the mixture prepared by stirring in the fourth step into an original sludge extraction area of the seabed by adopting a conduit method.
9. The method of claim 8, wherein the polymer comprises 2-3 of PVA powder, acrylic emulsion, acrylic monomer, styrene-butadiene rubber and chloroprene rubber, and 2-3 of carboxymethyl cellulose, polyacrylamide polymer and polysaccharide polymer.
10. An organic-inorganic hybrid consolidated seabed sludge composition is characterized by comprising spontaneous combustion gangue powder, coal ash, shell powder, coral aggregate, an excitant and organic components, wherein the excitant comprises an alkaline excitant and a salt excitant, and the organic components comprise a silane coupling agent, a water-absorbent resin and a polymer, wherein:
12-35 parts of spontaneous combustion gangue powder; 8-21 parts of coal mud ash; 3-9 parts of shell powder; 100-300 parts of coral aggregate; 1-5 parts of an excitant; 2-7 parts of organic components.
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