CN115583817B - Method and composition for organic-inorganic hybrid consolidation of seabed sludge - Google Patents
Method and composition for organic-inorganic hybrid consolidation of seabed sludge Download PDFInfo
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- 239000010802 sludge Substances 0.000 title claims abstract description 62
- 239000000203 mixture Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000007596 consolidation process Methods 0.000 title abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 64
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 39
- 229920000642 polymer Polymers 0.000 claims abstract description 34
- 235000014653 Carica parviflora Nutrition 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 16
- 239000011347 resin Substances 0.000 claims abstract description 16
- 239000002250 absorbent Substances 0.000 claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 13
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 12
- 150000003839 salts Chemical class 0.000 claims abstract description 12
- 239000002910 solid waste Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910003480 inorganic solid Inorganic materials 0.000 claims abstract description 8
- 241000243321 Cnidaria Species 0.000 claims abstract 6
- 239000003245 coal Substances 0.000 claims description 31
- 238000003756 stirring Methods 0.000 claims description 24
- 238000002485 combustion reaction Methods 0.000 claims description 16
- 230000002269 spontaneous effect Effects 0.000 claims description 16
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 12
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 10
- 230000002745 absorbent Effects 0.000 claims description 10
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 10
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 10
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 10
- 239000012190 activator Substances 0.000 claims description 8
- 150000004676 glycans Chemical class 0.000 claims description 7
- 229920002401 polyacrylamide Polymers 0.000 claims description 7
- 229920001282 polysaccharide Polymers 0.000 claims description 7
- 239000005017 polysaccharide Substances 0.000 claims description 7
- 239000000839 emulsion Substances 0.000 claims description 6
- 239000000178 monomer Substances 0.000 claims description 6
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 6
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 6
- 230000007774 longterm Effects 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 3
- 239000004115 Sodium Silicate Substances 0.000 claims description 2
- 238000010306 acid treatment Methods 0.000 claims description 2
- 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
- 238000000227 grinding Methods 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
- 229910052911 sodium silicate Inorganic materials 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
- 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
- 230000008023 solidification Effects 0.000 abstract description 2
- 238000007711 solidification Methods 0.000 abstract description 2
- 244000132059 Carica parviflora Species 0.000 description 18
- 230000000694 effects Effects 0.000 description 10
- 238000009991 scouring Methods 0.000 description 8
- 238000009396 hybridization Methods 0.000 description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 4
- 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
- 239000002253 acid Substances 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 238000005056 compaction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 239000004746 geotextile Substances 0.000 description 3
- 239000011664 nicotinic acid Substances 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 239000004575 stone 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
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000011734 sodium Substances 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
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 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
- 238000001179 sorption measurement 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
- 238000005406 washing Methods 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 organic-inorganic hybrid consolidation of seabed sludge, which are characterized in that the following material components are added into the extracted seabed water-containing sludge: the organic 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 externally doped inorganic powder material generate gel substances under the action of the excitant, the sludge particles can be solidified together, meanwhile, the organic ingredients are doped, the solidification 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. The organic components are mixed, so that the mixture is not dispersed in the pouring process under the seawater until enough strength is generated, and the hardened composite material has good mechanical property and durability.
Description
Technical Field
The invention belongs to the field of civil engineering materials and geotechnical engineering intersection, and relates to a method and a composition for efficiently solidifying seabed sludge through organic-inorganic hybridization.
Background
Due to the shortage of energy resources and the increasing severity of environmental pollution, efforts are being made worldwide to develop new energy sources in green and environment-friendly manner. Offshore wind projects are growing and are currently in a vigorous development stage. With the increase of the time of the offshore wind power engineering project operation, the problem that the pile foundation of the fan is seriously flushed occurs. Under the action of ocean current, vortex is formed near the pile foundation, so that sediment around the pile is washed away, the washing depth near the pile can reach several meters when serious, and meanwhile, the upper part of the pile can be affected by ocean waves, so that the stability of the wind power pile foundation is seriously affected. At present, the following measures are commonly used in engineering to prevent or slow down the influence of flushing on pile foundation safety: (1) Riprap (including sand-throwing bags, ripraps, precast concrete members, etc.); (2) Geotextile compaction (sand quilt, geotextile compaction, interlocking blocks, etc.); (3) bionic aquatic weed treatment; (4) reserving a flushing length, etc. However, these methods have limitations, and the stone throwing method is suitable for sea areas with clear seawater quality, otherwise, the stone throwing precision is affected, and the anti-scouring effect is reduced; the geotextile compaction method has poor long-term anti-scouring effect, and sediment is at risk of loss under repeated scouring of wave flow; the bionic aquatic weed treatment method is used for the sea area with higher flow velocity and smaller sediment grain size, has poorer effect, and can not form a bionic grass area covered by effective deposition; the reserved flushing length method needs to increase the length of the steel pile, so that the cost is greatly increased, the submarine cable introduced into the fan along with the steel pile cannot be fixed, and the fixed pile anchoring is required to be additionally designed. Accordingly, there is a need for a method for effectively preventing scouring of wind power foundation sludge, improving stability of wind power foundation, and facilitating sustainable development of offshore wind power projects.
Disclosure of Invention
The invention aims to maintain the stability of the seabed sludge near the wind power pile foundation under the action of the seabed gushing flow and the like, prevent the seabed sludge from being flushed away by vortex flow, and combine the self property of the seabed sludge and the environmental condition of the seabed sludge, and provides a method for solidifying the seabed sludge by organic-inorganic hybridization, so that the sludge near the wind power pile foundation at sea is solidified for a long time, the sludge near the wind power pile foundation at sea is not flushed away by the vortex flow near the pile foundation, and the stability of the wind power pile foundation at sea is improved.
In order to achieve the above object, according to a first aspect of the present invention, the following is a technical solution:
a method for organic-inorganic hybrid consolidation of subsea sludge, characterized in that the following material components are added to the withdrawn subsea aqueous sludge: the organic 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.
As a preferred embodiment, the inorganic solid waste powder includes spontaneous combustion coal gangue powder, coal slime dust and shell powder.
As a preferred embodiment, the coral aggregate may be acid treated by a weak acid such as acetic acid or phosphoric acid.
As a preferred embodiment, the material composition is added to the seabed water-containing sludge in parts per cubic meter:
12-35kg of spontaneous combustion coal gangue powder;
8-21kg of coal slime ash;
3-9kg of shell powder;
100-300kg of coral aggregate;
1-5kg of an exciting agent;
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 chemical composition, water content and other basic properties of the seabed sludge: the super absorbent resin mainly reduces the water content in the sludge extracted from the seabed, promotes the coagulation and the hardening of externally doped inorganic cementing materials, improves the integral anti-scouring and mechanical properties, and has the doping amount which 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 dispersion resistance of the sludge and the inorganic cementing material, prevents the treated sludge from seriously collapsing when pumped back to the sea bottom, influences the later mechanical property and the anti-scouring property, and the mixing amount mainly depends on the required dispersion resistance of the sludge consolidation; the silane coupling agent promotes the combination between organic matters and inorganic materials, improves the integrity and the anti-scouring performance of the sludge after treatment, and the mixing amount of the silane coupling agent and the mixing amount of the polymer are in positive correlation.
Mass tolerance of the above raw materials: spontaneous combustion coal gangue powder: 1%; coal slime ash: 1%; shell powder: 1%; coral aggregate: 3%; exciting agent: + -0.5%; an organic component; 0.5%.
As a preferred embodiment, the addition ratio of the alkaline activator to the salt activator is 7:1-5:1.
As a preferred embodiment, the alkaline activator is sodium silicate (Na 2 O·nSiO 2 ) The salt activator is sodium phosphate (Na) 3 PO 4 )。
As a preferred embodiment, the polymer includes one or more of PVA powder, acrylic emulsion, acrylic monomer, styrene-butadiene rubber, neoprene, carboxymethyl cellulose, polyacrylamide-based polymer, and polysaccharide-based polymer.
As a preferred implementation mode, the spontaneous combustion gangue powder is powder with the particle size of 2000-4000 meshes after being crushed and ground, wherein after long-term spontaneous combustion of the spontaneous combustion gangue, the content of carbon and sulfur in the gangue powder is low, the total amount of free calcium oxide and magnesium oxide is less than 3.5%; the coal slime ash is solid waste with uneven burning degree generated by a winery heating process, and the grain size is 400-1000 meshes; the shell powder is powder obtained by grinding shells of marine shellfish, and has particle size of 1000-2000 meshes; the coral aggregate is prepared by simply crushing coral in sea and acid treatment to obtain coarse and fine aggregate with particle diameter smaller than 30mm, wherein the coarse aggregate is 30% smaller than 5mm, 40% 5-15 mm and 30% 15-30 mm.
The basic properties of the raw materials used are shown in the following Table
As a preferred embodiment, the construction method of the organic-inorganic hybrid-concreted seabed sludge comprises the following steps:
pumping the seabed sludge in the to-be-treated range 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;
secondly, adding the coral aggregate into the slurry prepared by stirring in the first step, and continuously and uniformly stirring;
thirdly, adding the exciting agent, the curing agent and the super absorbent resin into the mixture prepared by the second stirring step, and uniformly stirring;
fourthly, adding the polymer into the mixture prepared by stirring in the third step, and continuing to stir uniformly;
and fifthly, pouring the mixture obtained by stirring in the fourth step into a region of the original extracted sludge on the seabed by adopting a conduit method. Sampling by a coring method from pouring to 60 days, and testing the mechanical related property of the consolidated body.
As a preferred embodiment, the polymer comprises 2 to 3 of PVA powder, acrylic emulsion, acrylic monomer, styrene-butadiene rubber, chloroprene rubber, and 2 to 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 following is a technical solution:
the organic-inorganic hybrid concretion seabed sludge composition is characterized by comprising spontaneous combustion coal gangue powder, coal slime ash, shell 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, wherein:
12-35 parts of spontaneous combustion coal gangue powder; 8-21 parts of coal slime ash; 3-9 parts of shell powder; 100-300 parts of coral aggregate; 1-5 parts of an exciting agent; 2-7 parts of organic components.
According to the invention, the seabed sludge is solidified by adopting an organic-inorganic hybridization method, inorganic solid waste powder (spontaneous combustion coal gangue powder, coal slime ash and shell powder) is doped into the high-water-content sludge taken out from the seabed, and an exciting agent (alkaline exciting agent and salt exciting agent) is doped to enable active ingredients in the seabed sludge and the solid waste powder to undergo chemical reaction, so that a gelatinous substance is generated to achieve the effect of solidifying sludge particles; the coral aggregate doped with acid can fully utilize the adsorption effect of the surface pores of the coral aggregate, absorb the water in the mixture to increase the consistency of the mixture, and has higher surface roughness, thereby being beneficial to increasing the physical effect between the aggregate and the mixture slurry; the super absorbent resin is added to further absorb the moisture in the mixture and improve the consistency of the mixture; the silane coupling agent is doped to play a bridging role, 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 mixed to have flocculation effect, so that the mixture is prevented from collapsing in the underwater pouring process.
In summary, the invention designs a method for efficiently solidifying the seabed sludge by organic-inorganic hybridization, which can fully utilize the active ingredients of the seabed sludge, enable the active ingredients and externally doped inorganic powder materials to generate gel substances under the action of an exciting agent, enable sludge particles to be solidified together, simultaneously mix organic ingredients, promote the solidification of the sludge and the inorganic powder materials, and enable the inorganic and organic materials to have chemical reaction to enhance the integrity. In addition, the organic components can ensure that the mixture does not collapse in the process of pouring under seawater until enough strength is generated, so that the hardened composite material has good mechanical property and durability. The method provided by the invention 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 sustainable development of offshore wind power projects.
Detailed Description
The invention is further illustrated by the following examples of embodiments:
embodiment one: the silt sample is taken from the periphery of a pile foundation of a marine wind power project in a sea area, the moisture content of the silt is about 98 percent, the organic matter content is 1.9 percent, and the main component is SiO 2 、Al 2 O 3 And CaCO (CaCO) 3 And the like, the silt powdery clay is offset. The alkaline excitant is selected as a main material to excite the internal active siliceous mineral and the aluminum mineral, and simultaneously the self-ignition gangue powder, the coal slime powder and the shell powder with higher activity are added to promote the consolidation of silt particles, and the alkaline excitant is the partial silt powdery clay, so that the consumption of auxiliary powdery materials is less, and the consumption of coral aggregate is more. The high water-absorbing resin is used for reducing the water in the sludge, and the high water-absorbing resin is used together with the polymer, so that the dispersion resistance and the integrity of the sludge consolidation 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 are further improved.
Other components and the dosage of the components are mixed in each cubic meter of seabed sludge:
18kg of spontaneous combustion coal gangue powder;
10kg of coal slime ash;
3.5kg of shell powder;
290kg of coral aggregate;
2kg of exciting agent (1.7 kg of alkaline exciting agent and 0.3kg of salt exciting agent);
3kg of organic component (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 polymer and polysaccharide polymer).
Embodiment two: the silt sample is taken from the periphery of a pile foundation of a marine wind power project in a sea area, the moisture content of the silt is about 102 percent, the organic matter content is about 1.5 percent, and the main component is SiO 2 、Al 2 O 3 And CaCO (CaCO) 3 And the like, the more silt powdery clay is mixed with more large-particle stones, the less auxiliary powdery materials are mixed, the less coral aggregate is mixed, and other raw material selection reasons are the same as those of the examples according to the activityThe difference between the siliceous and aluminous mineral contents is adjusted by the difference in the particle size of the sludge.
Other components and the dosage of the components are mixed in each cubic meter of seabed sludge:
24kg of spontaneous combustion coal gangue powder;
9kg of coal slime;
8kg of shell powder;
188kg of coral aggregate;
3.2kg of exciting agent (2.7 kg of alkaline exciting agent and 0.5kg of salt exciting agent);
3.6kg of organic component (0.35 kg of silane coupling agent, 0.3kg of super absorbent resin, 1.9kg of polymer A (any 2-3 kinds of PVA powder, acrylic emulsion, acrylic monomer, styrene-butadiene rubber, chloroprene rubber and carboxymethyl cellulose), and 0.95kg of polymer B (any 2-3 kinds of carboxymethyl cellulose, polyacrylamide polymer and polysaccharide polymer).
Embodiment III: the silt sample is taken from the periphery of a pile foundation of a marine wind power project in a sea area, the moisture content of the silt is about 120 percent, the organic matter content is about 2.2 percent, and the main component is SiO 2 、Al 2 O 3 And CaCO (CaCO) 3 And the like, the powder sand is more in doped auxiliary powdery materials, the coral aggregate is more, other raw material selection reasons are the same as those of the examples, and the adjustment is carried out according to the difference of the content of active siliceous mineral and aluminum mineral and the difference of the thickness degree of the silt particles.
Other components and the dosage of the components are mixed in each cubic meter of seabed sludge:
35kg of spontaneous combustion coal gangue powder;
20kg of coal slime ash;
8kg of shell powder;
280kg of coral aggregate;
4kg of an exciting agent (3.4 kg of an alkaline exciting agent and 0.6kg of a salt exciting agent);
3.9kg of organic component (0.35 kg of silane coupling agent, 0.4kg of super absorbent resin, 2.05kg of polymer A (any 2-3 kinds of PVA powder, acrylic emulsion, acrylic monomer, styrene-butadiene rubber, chloroprene rubber and carboxymethyl cellulose), and 1.1kg of polymer B (any 2-3 kinds of carboxymethyl cellulose, polyacrylamide polymer and polysaccharide polymer).
The construction method for solidifying the seabed sludge by organic-inorganic hybridization according to the three groups of cases comprises the following steps:
pumping the seabed sludge in the to-be-treated range 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 stirring in the first step, and continuously and uniformly stirring;
thirdly, adding the exciting agent, the curing agent and the super absorbent resin into the mixture prepared by the second stirring step, and uniformly stirring;
fourthly, adding the polymer into the mixture prepared by stirring in the third step, and continuing to stir uniformly;
and fifthly, pouring the mixture obtained by stirring in the fourth step into a region of the original extracted sludge on the seabed by adopting a conduit method.
According to the prepared samples of the mixing ratio of the three groups of cases, when the samples are maintained in a seawater environment for 60 days, drill cores are sampled to test compressive strength and flexural strength respectively, the compressive strength reaches 0.5-3MPa, the flexural strength is 0.08-0.39MPa, the long-term scouring effect of the surrounding seawater with the flow rate of more than 4m/s can be resisted, the stable existence of sludge around a wind power pile foundation can be ensured, and the long-term stability of the pile foundation is ensured.
The described embodiments are only a few specific embodiments of the present invention, and are merely based on a certain implementation of the general inventive concept, and are not intended to limit the scope of the present invention. Any modification, improvement or replacement made by those skilled in the art within the technical scope of the present invention shall be covered in the protection scope of the present invention.
Claims (4)
1. An organic-inorganic hybrid-concreted subsea sludge composition, characterized by comprising the following material components: 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 inorganic solid waste powder comprises spontaneous combustion coal gangue powder, coal slime ash and shell powder; the self-ignition coal gangue powder is powder with the particle size of 2000-4000 meshes after the self-ignition coal gangue is subjected to long-term self-ignition, 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 slime ash is solid waste with uneven burning degree generated by a winery heating process, and the grain size is 400-1000 meshes; the shell powder is powder obtained by grinding shells of marine shellfish, and has particle size of 1000-2000 meshes;
the material comprises the following components in parts by weight in each cubic meter of seabed water-containing sludge:
spontaneous combustion coal gangue powder 12-35kg;
8-21 of coal slime ash kg;
3-9 of shell powder kg;
100-300 parts of coral aggregate kg;
1-5 parts of an exciting agent kg;
organic component 2-7-kg;
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;
the coral aggregate is prepared by simply crushing coral in sea and acid treatment to obtain coarse and fine aggregate with particle diameter smaller than 30mm, wherein the coarse aggregate is 30% smaller than 5mm, 40% 5-15 mm and 30% 15-30 mm.
2. An organic-inorganic hybrid-based subsea sludge composition according to claim 1, characterized in that the alkaline activator is sodium silicate with a modulus of 1.8 and the salt activator is sodium phosphate.
3. The organic-inorganic hybrid-based subsea sludge composition according to claim 1, wherein the alkaline activator and the salt activator are added in a ratio of 7:1-5:1.
4. A construction method of organic-inorganic hybrid-concreted seabed sludge, which is characterized in that the organic-inorganic hybrid-concreted seabed sludge composition is adopted;
the construction method comprises the following steps:
pumping the seabed sludge in the to-be-treated range 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;
secondly, adding the coral aggregate into the slurry prepared by stirring in the first step, and continuously and uniformly stirring;
thirdly, adding the exciting agent, the curing agent and the super absorbent resin into the mixture prepared by the second stirring step, and uniformly stirring;
fourthly, adding the polymer into the mixture prepared by stirring in the third step, and continuing to stir uniformly;
and fifthly, pouring the mixture obtained by stirring in the fourth step into a region of the original extracted sludge on the seabed by adopting a conduit method.
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