CN114853409B - Alkaline residue foam light soil and preparation method thereof - Google Patents
Alkaline residue foam light soil and preparation method thereof Download PDFInfo
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- CN114853409B CN114853409B CN202210359567.2A CN202210359567A CN114853409B CN 114853409 B CN114853409 B CN 114853409B CN 202210359567 A CN202210359567 A CN 202210359567A CN 114853409 B CN114853409 B CN 114853409B
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- 239000006260 foam Substances 0.000 title claims abstract description 96
- 239000002689 soil Substances 0.000 title claims abstract description 73
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000004568 cement Substances 0.000 claims abstract description 31
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 25
- 239000011707 mineral Substances 0.000 claims abstract description 25
- 239000002910 solid waste Substances 0.000 claims abstract description 23
- 239000011343 solid material Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000000314 lubricant Substances 0.000 claims abstract 9
- 239000000203 mixture Substances 0.000 claims description 24
- 239000004088 foaming agent Substances 0.000 claims description 23
- 229910052602 gypsum Inorganic materials 0.000 claims description 16
- 239000010440 gypsum Substances 0.000 claims description 16
- 239000011734 sodium Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- 239000004604 Blowing Agent Substances 0.000 claims description 12
- 238000005187 foaming Methods 0.000 claims description 11
- 229910052708 sodium Inorganic materials 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 10
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 10
- 239000004094 surface-active agent Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 8
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 7
- 101100096651 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) SRN2 gene Proteins 0.000 claims description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 6
- 150000002191 fatty alcohols Chemical class 0.000 claims description 6
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 6
- 235000011152 sodium sulphate Nutrition 0.000 claims description 6
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 claims description 5
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 5
- MRUAUOIMASANKQ-UHFFFAOYSA-O carboxymethyl-[3-(dodecanoylamino)propyl]-dimethylazanium Chemical compound CCCCCCCCCCCC(=O)NCCC[N+](C)(C)CC(O)=O MRUAUOIMASANKQ-UHFFFAOYSA-O 0.000 claims description 5
- 229940075468 lauramidopropyl betaine Drugs 0.000 claims description 5
- 238000007865 diluting Methods 0.000 claims description 4
- 238000010790 dilution Methods 0.000 claims description 4
- 239000012895 dilution Substances 0.000 claims description 4
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- LYCAIKOWRPUZTN-NMQOAUCRSA-N 1,2-dideuteriooxyethane Chemical compound [2H]OCCO[2H] LYCAIKOWRPUZTN-NMQOAUCRSA-N 0.000 claims description 2
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000004566 building material Substances 0.000 abstract description 3
- 239000003518 caustics Substances 0.000 description 8
- 239000010802 sludge Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 239000011398 Portland cement Substances 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 239000004570 mortar (masonry) Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- -1 sodium fatty alcohol Chemical class 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 238000009621 Solvay process Methods 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- DGQNHSVGKNZFSM-UHFFFAOYSA-N [C].CCCCCCCCCCCCCCO Chemical compound [C].CCCCCCCCCCCCCCO DGQNHSVGKNZFSM-UHFFFAOYSA-N 0.000 description 1
- LNXUQKDKOXLHDD-UHFFFAOYSA-N [C].CCCCCCCCCCCCO Chemical compound [C].CCCCCCCCCCCCO LNXUQKDKOXLHDD-UHFFFAOYSA-N 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000003516 soil conditioner Substances 0.000 description 1
- 239000012257 stirred material Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0481—Other specific industrial waste materials not provided for elsewhere in C04B18/00
-
- 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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- 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
- C04B2111/40—Porous or lightweight materials
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The application relates to the technical field of building materials, and discloses an alkaline residue foam light soil and a preparation method thereof, wherein the alkaline residue foam light soil comprises the following steps: (1) solid material: the solid material comprises the following raw materials in parts by weight: and (3) cement: 5-40 parts; mineral powder: 30-50 parts of a lubricant; solid waste micro powder: 20-70 parts of a lubricant; the sum of the weight of the cement, the mineral powder and the solid waste micro powder is 100 parts; (2) Water: the weight ratio of water to solid material is 0.5:1-0.7:1; (3) foam bubble rate 50-73%. The alkaline residue foam light soil provided by the application is prepared by combining specific raw materials and alkaline residue in specific dosage, so that the prepared alkaline residue foam light soil meets the performance use requirement, not only is the alkaline residue provided for new resource utilization in the foam light soil field, but also the cement dosage is reduced, and the production cost is reduced.
Description
Technical Field
The application relates to the technical field of building materials, and mainly relates to alkaline residue foam light soil and a preparation method thereof.
Background
Because of the characteristics of the ammonia-soda process production process, about 0.3 ton of caustic sludge is produced every 1 ton of sodium carbonate is produced. With the rapid development of the soda industry in China, the annual output of soda in China is high, so that a large amount of caustic sludge is generated, the stacking amount of the caustic sludge is increased, and the problem of how to accelerate the comprehensive utilization of the caustic sludge is very prominent in the soda industry. The pollution control of the alkaline residue is always a worldwide problem, and the current alkaline residue treatment method mainly comprises the following steps: piling, directly discharging the sea, producing cement, making bricks, plastering mortar, desulfurizing by using alkaline residues, producing calcium-magnesium fertilizer or soil conditioner, and the like.
At present, researchers have carried out feasibility study on alkali residues as roadbed backfill materials, and related indoor study is carried out to verify technical feasibility. However, in actual construction, the roadbed backfill material containing the alkaline residue has a problem of difficulty in compaction due to the high water content and difficult dehydration characteristics of the alkaline residue.
Accordingly, the prior art is still in need of improvement and development.
Disclosure of Invention
In view of the defects of the prior art, the application aims to provide alkaline residue foam lightweight soil and a preparation method thereof, and aims to solve the problem that the existing alkaline residue is difficult to compact when being used as a roadbed backfill material.
The technical scheme of the application is as follows:
aiming at the problems of the existing caustic sludge utilization technology, the scheme utilizes the dry powdered caustic sludge, produces foam light soil through a certain technical means, directly pours the foam light soil on roadbed, cavity or the part needing backfill, forms a vertical rigid structure with certain strength (more than 0.6MPa of 28-day unconfined compressive strength) after hardening, and realizes the large-scale resource utilization of the caustic sludge.
The application provides alkaline residue foam light soil, which comprises the following components:
(1) Solid material: the solid material comprises the following raw materials in parts by weight:
and (3) cement: 5-40 parts, preferably 10-30 parts, more preferably 10-20 parts, most preferably 15 parts;
mineral powder: 30-50 parts, preferably 40 parts;
solid waste micro powder: 20-70 parts, preferably 40-50 parts;
the sum of the weight of the cement, the mineral powder and the solid waste micro powder is 100 parts.
The solid waste micropowder comprises alkali residues and optional desulfurized gypsum. Optionally with or without.
(2) Water: the weight ratio of water to solid material is from 0.5:1 to 0.7:1, preferably from 0.6:1 to 0.65:1.
(3) Foam: the foam is formed by diluting a macromolecular surfactant type foaming agent with additional water to form a foam liquid, and then introducing air (such as compressed air) into the foam liquid; the dilution factor may be 60 to 120 times, preferably 70 to 110 times, more preferably 80 to 100 times, more preferably 85 to 95 times, such as 90 times. The amount of water contained in the foam of (3) is not included or calculated in the amount of water of (2).
Wherein the polymeric surfactant based blowing agent is used in an amount of 0.09 to 1.0 wt%, preferably 0.1 to 0.9wt%, preferably 0.11 to 0.8wt%, preferably 0.12 to 0.7wt%, preferably 0.125 to 0.6wt%, e.g. 0.13wt%, 0.15wt%, 0.18wt%, 0.2wt%, 0.3wt%, 0.4wt% or 0.5wt% based on the total weight of the solid material.
Alternatively stated, the amount of foam is sufficient such that the ratio of the volume of air bubbles to the total volume of the wet foamed lightweight soil composition obtained after mixing of all materials (or the air bubble rate) is: 50-73%, preferably 52-58%.
Further, the solid waste micro powder is solid waste subjected to dry powder treatment, can be transported by using the existing transport means after the dry powder treatment, and can be injected into a storage tank for continuous blanking production. The dry pulverization can also excite the activity of the solid waste micropowder, and is beneficial to enhancing the filling effect.
The dry pulverization treatment is to dry and grind the solid waste material to reduce the water content to below 10%, and the particle size is smaller than 1mm.
In the preferred scheme of the application, the solid waste micro powder comprises the following raw materials in parts by weight:
10-50 parts of alkaline residue and 0-30 parts of desulfurized gypsum.
The alkaline residue and the desulfurized gypsum are usually wet with a certain water content, and in the scheme of the application, the alkaline residue and the desulfurized gypsum are metered in the dry powder state.
The desulfurized gypsum is also called as smoke-exhausting desulfurized gypsum, sulfur gypsum or FGD gypsum, and has the same main component as natural gypsum and is calcium sulfate dihydrate (the content is more than or equal to 93%). The desulfurized gypsum is an industrial byproduct gypsum obtained after sulfur dioxide in the flue gas is treated by industrial enterprises of coal or oil.
The mineral powder is blast furnace slag powder, and generally, the main chemical components of the mineral powder are CaO and SiO 2 、Al 2 O 3 Etc. and at the same time will contain a small amount of SO 3 、Fe 2 O、MgO、K 2 O、TiO 2 、Na 2 O, mnO, etc. On the one hand, the mineral powder can improve the recycling efficiency of slag, on the other hand, the mineral powder can greatly improve the durability and the reinforcing effect of the foam lightweight soil, improve the product performance of the foam lightweight soil, further reduce the consumption of cement and save the cost. For example, the ore powder in GB/T18046, which corresponds to the term granulated blast furnace slag powder for use in cement, mortar and concrete, is selected from one or more of the group consisting of S75 ore powder, S95 ore powder, S105 ore powder, preferably S95 ore powder.
Because the components in the alkaline residue comprise calcium carbonate, calcium chloride, sodium chloride, calcium sulfate and the like, the compressive strength ratio is low when being detected by referring to GB/T12957 industrial residue activity test method for cement admixture, the synergistic excitation effect can be generated after quantitative mineral powder and quantitative desulfurized gypsum are added in the application scheme, so that the cement, the alkaline residue, the mineral powder and the desulfurized gypsum can all carry out hydration reaction, and the high strength can be achieved by using a small amount of cement.
Further, the alkaline residue foam light soil provided by the application has the applicable wet density range of 500-800kg/m 3 Preferably 600-700kg/m 3 . The alkaline residue foam light soil provided by the application has the wet density of 600-650 kg/m 3 When the pressure is 28 days, the unconfined compressive strength is 0.61-1.43MPa; when the wet density is 700kg/m 3 When the pressure is over 28 days, the unconfined compressive strength is 0.78-1.16MPa; when the wet density is 800kg/m 3 When the pressure is over 28 days, the unconfined compressive strength is 1.11-1.62MPa.
The applicant has developed a foamed polymer soil, which can be mixed with a large amount of waste residue soil and unqualified soil, so that the production cost of building materials can be reduced, solid wastes can be recycled, waste materials are changed into valuable materials, the waste residue soil and alkaline residues are effectively utilized, and the foamed polymer soil with light weight and high strength can be obtained. However, not all construction sites are provided with waste residue soil, so that in order to realize large-scale resource utilization of alkaline residue, the applicant carries out further research and development to finally obtain the alkaline residue foam light soil provided by the application, the preparation of high-strength foam light soil can be realized without waste residue soil, and the alkaline residue foam light soil can be used in a larger amount than foam polymer soilThe strength of the alkaline residue foam lightweight soil is far higher than that of the foam polymer soil under the same wet density condition. When the wet density is 800kg/m 3 About, the 28-day unconfined compressive strength of the foamed polymeric soil is about 0.83MPa, and the 28-day unconfined compressive strength of the alkaline residue foamed lightweight soil can reach 1.62MPa.
In the prior art, the foam lightweight soil mainly comprises cement, mineral powder and fly ash, and the cement consumption is at least 30%. By adopting the technical scheme of the application, not only the large-scale utilization of the alkaline residue can be realized, but also the consumption of cement can be greatly reduced, and the production cost is reduced.
Further, the high molecular surfactant foaming agent is a compound surfactant composed of a polyether surfactant and a small molecular organic surfactant.
More preferably, the polymeric surfactant-based blowing agent is selected from one or more of the following SRS1 blowing agents, SRN2 blowing agents and SRL0 blowing agents:
wherein the SRS1 foaming agent comprises: 63-73wt% of fatty alcohol polyoxyethylene ether sodium sulfate, 10-15wt% of triethanolamine, 9-15wt% of sodium dodecyl sulfate, 4-7wt% of diethanol monoisopropanolamine and 4-7wt% of lauramidopropyl betaine; the wt% is based on the mass of SRS1 blowing agent. The amounts of all components add up to 100% by weight.
The SRN2 foaming agent comprises: 33-55wt% of fatty alcohol polyoxyethylene ether sodium sulfate, 5-10wt% of triethanolamine, 3-6wt% of sodium dodecyl sulfate, 2-5wt% of diethanol monoisopropanolamine, 20-35wt% of alpha-alkenyl sodium sulfonate, 15-25wt% of ethylene glycol butyl ether and 2-5wt% of 12-14 mixed alcohol; the wt% is based on the mass of the SRN2 blowing agent. The amounts of all components add up to 100% by weight.
The SRL0 foaming agent comprises: 40-55wt% of sodium fatty alcohol polyoxyethylene ether sulfate, 3-6wt% of sodium dodecyl sulfate, 20-35wt% of alpha-alkenyl sodium sulfonate, 2-5wt% of lauramidopropyl betaine and 15-20wt% of water (preferably distilled water or softened water). The wt% is based on the mass of the SRL0 blowing agent. The amounts of all components add up to 100% by weight.
Typically, the 12-14 mixed alcohol has a weight ratio of carbon dodecanol to carbon tetradecanol of 3-9:1-5, preferably 4-8:2-4, e.g. a mass ratio of 7:3 or 6:4.
In the present application, sodium alpha-alkenyl sulfonate, as defined in the prior art, is generally referred to as R 1 -CH=CH-(CH 2 ) n -SO 3 Na，R 1 =C 9 -C 13 N=1, 2 or 3.
Sodium fatty alcohol polyoxyethylene ether sulfate RO (CH) 2 CH 2 O)n-SO 3 Na (n=2 or 3, r is 12 to 15 alkyl (e.g. 13 or 14 alkyl)) is a surfactant commonly used in detergents.
Typically, the foam has a standard density (or apparent density) of 45-55kg/m 3 Preferably 48-52 kg/m 3 。
Generally, the amount of foam used is: to form a wet composition per kg, the amount of foam = standard density of foam (kg/m 3 ) Air bubble ratio (%) in the x foam lightweight soil composition. The bubble ratio (%) is the volume ratio of bubbles in the composition (i.e., wet material) formed by mixing all materials.
The application also provides a preparation method of the alkaline residue foam light soil, which comprises the following steps:
1) Weighing cement, mineral powder, solid waste micro powder, foaming agent and water according to a proportion for standby;
2) Diluting the foaming agent with water to obtain a foam liquid, and then introducing air (such as compressed air) into the foam liquid to obtain foam;
3) Firstly, uniformly stirring and mixing cement, mineral powder, solid waste micro powder and water; then adding foam, continuously stirring and uniformly mixing to obtain the wet foam light soil composition.
Preferably, the method further comprises:
4) The wet foamed lightweight soil composition is spread over the surface of the substrate and cured (e.g., 1-3 hours, such as 1.30, 2, or 2.5 hours) to obtain an alkaline residue foamed lightweight soil.
Preferably, the foaming agent is diluted with water to form a foaming agent solution with a dilution factor of 60-120 times, the prepared foaming agent solution is injected into a foaming device, the pressure of compressed air which is input into the foaming device is controlled (for example, the pressure is 1.5-2 standard atmospheric pressure), and the compressed air is introduced into the foaming agent solution to prepare the foam. The prepared foam is stored for no more than 10min independently and should be used as soon as possible. Wherein the compressed air is output from a compressed air source, such as an air compressor or compressed air storage tank.
In particular, in step 2), in order to achieve adequate foaming and to allow the volume of foam obtained to remain stable for 6-15 minutes, it is important to control the pressure of the compressed air fed into the foaming device (1.5-2 standard atmospheres). If the pressure of the compressed air fed into the foaming device is low (below 1.5 atm), the foaming liquid cannot be sufficiently foamed, and if the pressure is high (above 2 atm), the volume of the obtained foam is unstable (a large number of bubbles are broken when stored alone before use, resulting in a reduction in the volume of the foam).
Preferably, in step 3), the first stirring rate is 30-100r/min and the stirring time is 1-30min (preferably 5-20min, such as 15 min); the second stirring speed is 40-120r/min, and the stirring time is 1-10min (preferably 4-7 min).
Preferably, the alkaline residue foamed lightweight soil composition prepared in step 3) has a wet density of 500-800kg/m 3 Preferably 600-700kg/m 3 For example 600, 650 or 700kg/m 3 。
Generally, the dry density of the cured alkaline residue foamed lightweight soil is about equal to or slightly lower than the wet density. For example, the dry density is 500-800kg/m 3 Preferably 600-700kg/m 3 For example 600, 650 or 700kg/m 3 。
In general, the foam produced should be used immediately, preferably it is stored alone for no more than 10 minutes, more preferably no more than 8 minutes.
Preferably, in step 2), the pressure of the compressed air fed into the foaming device is controlled to be 1.5-2 atm in order to achieve sufficient foaming and to allow the volume of the foam obtained to remain stable for 6-15 minutes.
The preliminary setting time (initial setting time) of the lightweight soil composition of the present application can be controlled within a reasonable range suitable for construction, for example, 1 to 3 hours, such as 1.30, 2 or 2.5 hours. In addition, the complete curing time (final setting time) is generally 6 to 20 hours, preferably 8 to 18 hours, more preferably 10 to 16 hours. The summer environment temperature is higher, and the complete curing time is 6-12 hours.
In general, the cement is ordinary Portland cement P.O42.5 or P. O42.5R conforming to general Portland cement GB 175.
In general, the main chemical components of the mineral powder are CaO and SiO 2 、Al 2 O 3 Contains a small amount of SO 3 、Fe 2 O、MgO、K 2 O、TiO 2 、Na 2 O, mnO. For example, the ore powder in GB/T18046, which corresponds to the term granulated blast furnace slag powder for use in cement, mortar and concrete, is selected from one or more of the group consisting of S75 ore powder, S95 ore powder, S105 ore powder, preferably S95 ore powder.
The beneficial effects are that: the alkaline residue foam light soil provided by the application is prepared by combining specific raw materials and alkaline residue in specific dosage, so that the prepared alkaline residue foam light soil meets the performance use requirement, not only is the alkaline residue provided for new resource utilization in the foam light soil field, but also the cement dosage is reduced, and the production cost is reduced.
Drawings
FIG. 1 is a photograph of the foam obtained in example 1.
Fig. 2 is a photograph of the light soil block after curing in example 1.
Detailed Description
The application provides alkaline residue foam light soil and a preparation method thereof, and the application is further described in detail below in order to make the purposes, technical schemes and effects of the application clearer and more definite. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The application is further illustrated by the following specific examples, which are included in the scope of the claimed application.
The various components of the blowing agent used in the examples are commercially available products. For example, sodium fatty alcohol polyoxyethylene ether sulfate is sodium dodecyl alcohol polyoxyethylene ether sulfate (n=3) available from north xin Rundex chemical Co., ltd. The sodium alpha-alkenyl sulfonate is a sodium alpha-alkenyl sulfonate product purchased from light chemical company, inc.
The cement is ordinary Portland cement P.O42.5 or P. O42.5R which accords with general Portland cement GB 175.
The ore powder used in the examples is one or more of S75 ore powder, S95 ore powder, S105 ore powder, preferably S95 ore powder, in accordance with GB/T18046, granulated blast furnace slag powder for use in cement, mortar and concrete.
The mineral powder, the alkaline residue and the desulfurized gypsum used in the embodiment are all dry powder, the water content is below 10%, and the particle size is less than 1mm.
Example 1
The SRS1 foaming agent comprises the following components: 69wt% of fatty alcohol polyoxyethylene ether sodium sulfate, 11wt% of triethanolamine, 9wt% of sodium dodecyl sulfate, 6wt% of diethanol monoisopropanolamine and 5wt% of lauramidopropyl betaine.
34kg of cement, 103 kg mineral powder, 155kg of alkaline residue, 52kg of desulfurized gypsum and 223 kg of water are weighed and mixed for 20min (45 r/min), and then the mixture (water-solid ratio is 223/(34+103+155+52) =0.65:1) is obtained. Then 1.37kg of SRS1 foaming agent was weighed, and 164.1kg of water was added to dilute to obtain a foam solution, the prepared foam solution was injected into a foaming device, compressed air having an output pressure of 1.8 atm was introduced into the foam solution to allow the foam solution to foam sufficiently to obtain a foam (50 ml of a sample was put into a measuring cylinder, and the change in the height of the foam in the measuring cylinder was observed. The height of the foam gradually decreased after about 17 minutes, which indicates that the volume of the foam when stored alone could be kept stable for about 17 minutes). The appearance of the white foam is shown in fig. 1. Then, immediately after the foam was obtained (within 10 minutes), the foam was added to the above-mentioned mixture and mixed with continuous stirring for 10 minutes (50 r/min) to obtain a wet foam lightweight soil composition (i.e., a uniformly stirred material), the flow value (i.e., fluidity) of the composition was measured to be 162mm, and the wet density of the composition was measured to be 610kg/m 3 . The resulting wet composition was spread on the ground and cured for 1.5 hours to obtain alkaline residue foamed lightweight soil. In addition, test pieces were prepared from the resulting wet foamed lightweight soil composition, as shown in fig. 2.
After 28 days, the 28D unconfined strength (MPa) of the alkaline residue foam lightweight soil is measured to be 0.61, and the use requirement of JTG D30-2015 of the highway subgrade design rule is met.
Example 2
The procedure was similar to example 1. The designed wet density is 700kg/m 3 Alkali residue foam light soil.
Example 3
The procedure was similar to example 1. The designed wet density is 800kg/m 3 Alkali residue foam light soil.
Example 4
The procedure was similar to example 1.
84kg of cement, 84kg mineral powder, 112kg of caustic sludge and 183 kg of water are weighed and mixed for 20min (45 r/min), and then the mixture (water-solid ratio: 183/(84+84+112) =0.65:1) is obtained. And adding the prepared foam into the mixture, and continuously stirring and mixing for 10min (50 r/min) to obtain the wet foam lightweight soil composition.
The composition and performance of the alkaline residue foam lightweight soil are shown in Table 1.
TABLE 1
It should be noted that the amount of water in table 1 does not include the amount of water used to dilute the foam.
It is to be understood that the application is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (10)
1. The alkaline residue foam light soil is characterized by comprising the following raw materials:
(1) Solid material: the solid material consists of the following raw materials in parts by weight:
and (3) cement: 10-30 parts of a lubricant;
mineral powder: 30-50 parts of a lubricant;
solid waste micro powder: 20-70 parts of a lubricant;
the sum of the weight of the cement, the mineral powder and the solid waste micro powder is 100 parts;
(2) Water: the weight ratio of water to solid material is 0.5:1-0.7:1;
(3) Foam: the foam is formed by diluting a macromolecular surfactant foaming agent with water for dilution to form foam liquid, and then introducing air into the foam liquid; the amount of water contained in the foam for dilution is not included or calculated in the amount of water in (2);
the foam is used in an amount sufficient to provide a proportion of air bubbles of 50-73% by volume of the total volume of the wet foamed lightweight soil composition obtained after mixing of all materials;
the water content of the solid waste micro powder is below 10%, and the particle size is smaller than 1mm;
the alkaline residue foam light soil has a suitable wet density of 500-800kg/m 3 ；
The solid waste micro powder consists of the following raw materials in parts by weight:
10-50 parts of alkaline residue and 0-30 parts of desulfurized gypsum.
2. The alkaline residue foam light soil according to claim 1, wherein the solid material comprises the following raw materials in parts by weight:
and (3) cement: 10-20 parts of a lubricant;
mineral powder: 30-50 parts of a lubricant;
solid waste micro powder: 20-70 parts of a lubricant;
the sum of the weight of the cement, the mineral powder and the solid waste micro powder is 100 parts.
3. The alkaline residue foam light soil according to claim 1, wherein the solid material comprises the following raw materials in parts by weight:
and (3) cement: 15 parts;
mineral powder: 30-50 parts of a lubricant;
solid waste micro powder: 40-50 parts;
the sum of the weight of the cement, the mineral powder and the solid waste micro powder is 100 parts.
4. The alkaline residue foamed lightweight soil of claim 1, wherein the weight ratio of water to solid material is 0.6:1 to 0.65:1.
5. The alkaline residue foamed lightweight soil according to claim 1, wherein the alkaline residue foamed lightweight soil has an amount of foam sufficient such that the volume of air bubbles is 52-58% of the total volume of the wet foamed lightweight soil composition obtained after mixing all materials, and a wet density in the range of 600-700kg/m 3 The unconfined compressive strength is more than 0.6MPa in 28 days.
6. The alkaline residue foamed lightweight soil of claim 1, wherein the polymeric surfactant-based foaming agent is selected from one or more of SRS1 foaming agent, SRN2 foaming agent and SRL0 foaming agent;
the SRS1 foaming agent comprises: 63-73wt% of fatty alcohol polyoxyethylene ether sodium sulfate, 10-15wt% of triethanolamine, 9-15wt% of sodium dodecyl sulfate, 4-7wt% of diethanol monoisopropanolamine and 4-7wt% of lauramidopropyl betaine; the wt% is based on the mass of SRS1 blowing agent; the amounts of all components add up to 100 wt.%;
the SRN2 foaming agent comprises: 33-55wt% of fatty alcohol polyoxyethylene ether sodium sulfate, 5-10wt% of triethanolamine, 3-6wt% of sodium dodecyl sulfate, 2-5wt% of diethanol monoisopropanolamine, 20-35wt% of alpha-alkenyl sodium sulfonate, 15-25wt% of ethylene glycol butyl ether and 2-5wt% of 12-14 mixed alcohol; the wt% is based on the mass of the SRN2 blowing agent; the amounts of all components add up to 100 wt.%;
the SRL0 foaming agent comprises: 40-55wt% of fatty alcohol polyoxyethylene ether sodium sulfate, 3-6wt% of sodium dodecyl sulfate, 20-35wt% of alpha-alkenyl sodium sulfonate, 2-5wt% of lauramidopropyl betaine and 15-20wt% of water; the wt% is based on the mass of the SRL0 blowing agent; the amounts of all components add up to 100% by weight.
7. A method for preparing the alkaline residue foam lightweight soil according to any one of claims 1 to 6, which comprises the following steps:
1) Weighing cement, mineral powder, solid waste micro powder, foaming agent and water according to a proportion for standby;
2) Diluting a foaming agent with water to obtain a foam liquid, and then introducing air into the foam liquid to obtain foam;
3) Firstly, uniformly stirring and mixing cement, mineral powder, solid waste micro powder and water; then adding foam, continuously stirring and uniformly mixing to obtain the wet alkaline residue foam light soil composition.
8. The method for preparing the alkaline residue foam lightweight soil according to claim 7, which is characterized by further comprising the following steps:
spreading and curing the wet alkaline residue foam lightweight soil composition on the surface of a substrate to obtain the alkaline residue foam lightweight soil.
9. The method for preparing alkaline residue foamed lightweight soil according to claim 7 or 8, characterized in that in step 3), the first stirring rate is 30-100r/min, and the stirring time is 1-30min; the second stirring speed is 40-120r/min, and the stirring time is 1-10min; and/or
The wet density of the alkaline residue foam lightweight soil composition prepared in the step 3) is 500-800kg/m 3 The 28-day unconfined compressive strength of the alkaline residue foam light soil is more than 0.6 MPa; and/or
In step 2), the pressure of the compressed air fed into the foaming device is controlled to be 1.5-2 atm in order to achieve sufficient foaming and to allow the volume of the foam obtained to remain stable for 6-15 minutes.
10. The method for preparing alkaline residue foamed lightweight soil according to claim 7, wherein the dry density of the cured alkaline residue foamed lightweight soil is 500-800kg/m 3 。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1139025A (en) * | 1995-06-28 | 1997-01-01 | 乔希海 | Dry process processing caustic sludge to produce earth for earthwork |
| CN113754394A (en) * | 2021-08-30 | 2021-12-07 | 广东盛瑞科技股份有限公司 | Foamed polymer soil and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1139025A (en) * | 1995-06-28 | 1997-01-01 | 乔希海 | Dry process processing caustic sludge to produce earth for earthwork |
| CN113754394A (en) * | 2021-08-30 | 2021-12-07 | 广东盛瑞科技股份有限公司 | Foamed polymer soil and preparation method thereof |
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