CN115140960B - Anti-caking agent, premix, soil body curing agent, and preparation and application thereof - Google Patents
Anti-caking agent, premix, soil body curing agent, and preparation and application thereof Download PDFInfo
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- CN115140960B CN115140960B CN202210701508.9A CN202210701508A CN115140960B CN 115140960 B CN115140960 B CN 115140960B CN 202210701508 A CN202210701508 A CN 202210701508A CN 115140960 B CN115140960 B CN 115140960B
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- Prior art keywords
- agent
- premix
- soil body
- caking
- water
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 233
- 239000002689 soil Substances 0.000 title claims abstract description 137
- 238000002360 preparation method Methods 0.000 title abstract description 17
- -1 premix Substances 0.000 title description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 106
- 239000002994 raw material Substances 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000003756 stirring Methods 0.000 claims abstract description 25
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 11
- 239000002910 solid waste Substances 0.000 claims description 82
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 60
- 239000000463 material Substances 0.000 claims description 58
- 238000002156 mixing Methods 0.000 claims description 55
- 239000000843 powder Substances 0.000 claims description 52
- 239000004568 cement Substances 0.000 claims description 50
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 46
- 239000002893 slag Substances 0.000 claims description 43
- 239000000292 calcium oxide Substances 0.000 claims description 42
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 38
- 239000010440 gypsum Substances 0.000 claims description 37
- 229910052602 gypsum Inorganic materials 0.000 claims description 37
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 35
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 30
- 239000002956 ash Substances 0.000 claims description 29
- 238000010276 construction Methods 0.000 claims description 28
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 25
- 239000012752 auxiliary agent Substances 0.000 claims description 22
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 claims description 21
- 235000010261 calcium sulphite Nutrition 0.000 claims description 21
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 21
- 235000010755 mineral Nutrition 0.000 claims description 21
- 239000011707 mineral Substances 0.000 claims description 21
- 235000012239 silicon dioxide Nutrition 0.000 claims description 17
- 239000002002 slurry Substances 0.000 claims description 15
- 239000006227 byproduct Substances 0.000 claims description 14
- 239000000377 silicon dioxide Substances 0.000 claims description 13
- 239000004575 stone Substances 0.000 claims description 11
- 238000011049 filling Methods 0.000 claims description 10
- 239000010881 fly ash Substances 0.000 claims description 10
- 239000010802 sludge Substances 0.000 claims description 10
- 239000001506 calcium phosphate Substances 0.000 claims description 9
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 9
- 229910000391 tricalcium phosphate Inorganic materials 0.000 claims description 8
- 235000019731 tricalcium phosphate Nutrition 0.000 claims description 8
- 229940078499 tricalcium phosphate Drugs 0.000 claims description 8
- 235000010216 calcium carbonate Nutrition 0.000 claims description 7
- 239000006185 dispersion Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910021536 Zeolite Inorganic materials 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- 239000010813 municipal solid waste Substances 0.000 claims description 5
- 239000010457 zeolite Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 229910021487 silica fume Inorganic materials 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 2
- 239000001095 magnesium carbonate Substances 0.000 claims description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- 239000012744 reinforcing agent Substances 0.000 claims 2
- 238000003801 milling Methods 0.000 claims 1
- 238000005054 agglomeration Methods 0.000 abstract description 18
- 230000002776 aggregation Effects 0.000 abstract description 17
- 239000001692 EU approved anti-caking agent Substances 0.000 abstract description 9
- 235000012255 calcium oxide Nutrition 0.000 description 39
- 238000012360 testing method Methods 0.000 description 16
- 239000000203 mixture Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 13
- 239000000126 substance Substances 0.000 description 13
- 238000007873 sieving Methods 0.000 description 7
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000010453 quartz Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000007596 consolidation process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 239000002440 industrial waste Substances 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000012216 screening Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 239000004848 polyfunctional curative Substances 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- 229910052925 anhydrite Inorganic materials 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 229940095672 calcium sulfate Drugs 0.000 description 2
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000003623 enhancer Substances 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000013538 functional additive Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 150000002484 inorganic compounds Chemical class 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 229940095564 anhydrous calcium sulfate Drugs 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- JYYOBHFYCIDXHH-UHFFFAOYSA-N carbonic acid;hydrate Chemical compound O.OC(O)=O JYYOBHFYCIDXHH-UHFFFAOYSA-N 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000009877 shengmai Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000006467 substitution reaction 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
-
- 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
- C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
-
- 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
-
- 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
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)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention relates to the technical field of anti-caking agents, in particular to an anti-caking agent for a soil body curing agent, a related premix, the soil body curing agent, and preparation and application thereof. The anti-caking agent comprises a functional component and a dispersing component; wherein the functional component is a water reactive component; the dispersing component is an inert component and does not react with water; the weight percentage of the functional components is 5-70%, and the weight percentage of the dispersing components is 30-95%. By reasonably selecting and matching raw materials and combining functional components and dispersing components, the problems of agglomeration and caking of the raw materials are well solved, and the method has wide application in the aspects of premix, soil body curing agent, dry-mixed mortar, stirring piles and the like.
Description
Technical Field
The invention relates to the technical field of anti-caking agents, in particular to an anti-caking agent for a soil body curing agent, a related soil body curing agent, and preparation and application thereof.
Background
At present, soil body curing agents are used in various aspects, such as construction of various roads, railway construction, mud flat construction, land arrangement, river and lake management, airport construction and the like; the method is suitable for pit base layer, curtain grouting, pit filling, rock slope consolidation, beach planting, rock slope greening, vegetation recovery, soil layer spraying, sha Po consolidation and the like; the method is used for landfill construction, lake and river treatment, farmland water conservancy, harbor construction and the like; the method is used for beach planting, rock slope greening, vegetation recovery, sha Po consolidation and the like; the method is used for sludge consolidation, soft foundation treatment, beach construction and the like.
The inorganic compound soil body curing agent takes cement and lime as main raw materials, but the cement production process has high energy consumption and high cost, and discharges a large amount of carbon dioxide gas to pollute the environment (about 100-DEG electricity is needed for each ton of cement production, and about 500 kg of CO is released) 2 ). Lime is used as a curing agent, the doping amount of the lime needs to be strictly controlled, and the problems of soil cracking and the like are often caused by the excessively high doping amount. Along with the development of industrialization, various industrial wastes bring serious harm to the environment where human beings depend on and live, and industrial slag and other wastes are developed and utilized to form a soil body curing agent which becomes an important way for recycling the solid wastes.
Bulk solid wastes such as fly ash, carbide slag, gypsum, steel slag, aluminum slag, red mud, sludge incineration slag, household garbage incineration ash and various building solid wastes are used as waste residues with more and more discharge, the storage quantity is huge, a large amount of land is occupied, and serious environmental pollution is caused. The curing agent is prepared from the industrial wastes, so that the recycling of the industrial wastes can be realized, the adverse effect of the industrial wastes on the environment is eliminated, the problems of high energy consumption and high emission caused by using the traditional inorganic compound curing agent are solved, the engineering cost is saved, the curing effect is improved, and the cost is lower.
However, in the preparation process of the soil body curing agent, the curing agent has unstable performance due to various industrial solid waste sources, complex components and different water contents. The invention mainly focuses on the agglomeration problem in performance indexes. Agglomerating and caking of the curing agent materials during mixing, transporting and storing can greatly influence the use of the curing agent.
CN112430049a discloses a curing agent for reducing permeability coefficient of heavy metal polluted soil and effective diffusion coefficient of pollutants, a preparation method and application thereof, wherein in the concrete preparation process of the curing agent, steel slag powder, carbide slag powder and gypsum powder are required to be dried respectively, and the problem of agglomeration of water-containing raw materials is solved by using a drying mode, so that the energy consumption is high and the production efficiency is low.
CN113173766a discloses a soil body curing agent and a construction process of rotary-spraying anchor pile using the same, the raw materials comprise 40-60% of cement, 20-35% of desulfurized gypsum, 10-20% of slag powder, 0.01-1% of water reducer and 0.01-5% of sulfoaluminate excitant, and the large caking is required to be removed by sieving in the preparation process of the patent so as to improve the quality of the finished product of the soil body curing agent.
CN112374849a discloses a filling material suitable for metal underground mine and its use method, in the actual preparation process, the raw material of curing agent needs to be mechanically stirred, dried and ground.
CN111943625a discloses a soft soil curing agent, which contains slag powder, industrial by-products of plaster, zeolite powder, carbide slag, fly ash and other industrial solid wastes, but the water content and screen residue of each solid waste raw material are strictly limited.
KR101299163B1 relates to a cured material composition for hardening soft soil foundations using hard cement and mineral industry by-products, and a method for producing the same, which discloses a cured composition comprising35 to 60% by weight of coarse hard cement as a byproduct of steel making, 20 to 30% by weight of blast furnace slag powder, 5 to 10% by weight of fly ash and 15 to 25% by weight of desulfurized gypsum. And discloses that coarse hard cement will initially cause active hydration reaction to produce calcium hydroxide (Ca (OH) 2 ) This promotes pozzolanic reactions of blast furnace slag powder and fly ash, thereby developing long-term strength of the long-term effect and contributing to the development of initial strength. Fly ash contains a large amount of silica (SiO 2 ) And alumina (Al) 2 O 3 ) It is produced by hydration reaction with calcium hydroxide (Ca (OH)) produced in cement 2 ) Together form insoluble hydrates to harden. The patent focuses on strength and does not focus on the agglomeration of the raw materials.
CN108178580a discloses a stirring pile and jet grouting pile curing agent, wherein the curing agent comprises the following raw materials in percentage by mass: 35-40% of Portland cement; granulating 50-55% of blast furnace slag; 8-20% of quicklime; 5-10% of desulfurized gypsum; 1-3% of sodium salt excitant; and 0.4-0.8% rayon, which uses an inert material, but does not use an inert material for the anti-agglomerating agent.
CN111439987a discloses a beach sludge curing agent in which an enhanced activator (components of 16-23% calcium oxide, 46-66% sodium silicate, 16-27% calcium chloride and 1-7% polyacrylamide) is used, the enhanced activator being capable of rapidly consuming water in the sludge and giving off heat to increase the temperature of the sludge and thereby increase the hydration rate of the potentially active material, but the main focus of this patent is to consume water in the sludge rather than water from the raw materials in the composition of the curing agent.
KR102117552B1 discloses a curing composition for reinforcing a low cement soft soil foundation and a soft soil foundation treatment method using the same, which disclose that a circulating resource (industrial by-product) containing a large amount of calcium oxide is effective in securing early strength, thereby reducing moisture in the soft soil foundation to be reinforced. In addition, the water in the soft soil foundation can be evaporated by the heat generated by the reaction, so that the effect can be further improved. It follows that the use of cyclic resources (industrial by-products) containing a large amount of calcium oxide is mainly based on the consideration of ensuring early strength and evaporating water in soft soil foundations.
CN107572990B discloses a low-cost high-efficiency soft soil curing agent, a preparation method and application thereof, which discloses slag powder: quicklime: desulfurization gypsum: early strength agent = 100: 30-50: 50-70: 0 to 5, however, when quicklime is mixed with wet gypsum powder, severe slaking reaction occurs to produce calcium hydroxide and a large amount of heat, which does not take into consideration the need to use inert dispersing components in combination.
In summary, in the prior art, the raw materials with high water content are subjected to drying treatment or the water content and the screen residue of each solid waste raw material are strictly limited, and the attention is also that the strength of soil and the removal of the moisture of the soil are also paid, and quick lime is directly added, a large amount of heat release and expansion are generated, so that adverse effects are generated, and how to solve the agglomeration and caking problems with high efficiency and low cost is not excessively related, and the special anti-agglomeration composition/anti-caking agent is not proposed.
Disclosure of Invention
In view of the above, in one aspect, the present invention aims to provide an anti-agglomerating agent and its preparation and application, and before the present invention, the soil body curing agent field, dry-mixed mortar, filling material, backfill material and roadbed material field, do not have special anti-agglomerating agent to solve the agglomeration and agglomeration problems of raw materials. The invention well solves the problems by reasonably selecting and matching raw materials and combining functional components and dispersing components.
On the other hand, the invention aims to provide a premix and preparation and application thereof, and the premix can not cause agglomeration and caking of each raw material in the field of soil hardening agents, dry-mixed mortar, filling materials, backfill materials and roadbed materials. According to the analysis of the present invention, the wet solid waste with the water content of above 0.5%, especially with the water content of above 1%, and the solid waste with the water content of above 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15% are easy to cause agglomeration and caking. The problem of agglomeration and caking can be well solved by premixing the solid waste with the water content and the anti-caking agent.
The wet solid waste according to the present invention is, unless otherwise specified, solid waste containing a certain amount of water/adhering water, particularly solid waste that tends to agglomerate or agglomerate during use, and specifically solid waste having a water content of 0.5% or more, particularly solid waste having a water content of 1% or more, and the above-defined water content of 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15% or more falls within this range. The water content is calculated: the wet solid waste weight is a, the weight after drying to constant weight at low temperature is b, and the water content is = (a-b)/b (the result is converted into percentage).
It should be emphasized here that the type of the solid waste is not particularly limited, as long as it is suitable for applications in the field of soil hardening agents and in the fields of dry-mixed mortar, filling materials, backfill materials, roadbed materials, and the like, for example. Meanwhile, even the same solid waste has quite different water contents due to different sources, and only the water contents of more than 0.5%, especially more than 1%, and further more than 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% and 15% are needed to be treated. In addition, if the wet solid waste having a water content of 1% or more is dehydrated by a treatment such as drying, it is not necessary to additionally mix the wet solid waste with the anti-caking agent, and it is permissible to add the anti-caking agent in this case. Meanwhile, some solid wastes with low water content, such as dried solid wastes or dried solid wastes, can be selected, and then some wet solid wastes defined above are used in a matching way, so long as the total water content of the solid wastes is more than 0.5%, especially more than 1%, and the solid wastes are all within the scope of the invention.
In another aspect, the invention aims to provide a soil body curing agent and preparation and application thereof, and by adding the anti-caking agent or the premix containing the anti-caking agent, the problems of caking and agglomeration of the soil body curing agent in the processes of mixing, transporting and storing materials can be well solved, and meanwhile, the stability of the performance of the soil body curing agent can be ensured.
Finally, the invention aims to provide construction powder for stirring piles, construction slurry for stirring piles, solidified soil, dry-mixed mortar, filling materials, backfilling materials, roadbed materials and the like which use related anti-caking agents or premixes containing the anti-caking agents and soil curing agents, and the related products have stable performances and meet performance indexes in practical application.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an anti-caking agent comprising a functional component and a dispersing component; wherein the functional component is a water reactive component; the dispersing component is an inert component and does not react with water.
Further, the functional component comprises one or more of calcium oxide, magnesium oxide, anhydrous gypsum and semi-hydrated gypsum. It is emphasized here that the calcium oxide referred to in the present invention is free calcium oxide, which otherwise does not meet the performance requirements of the functional component. The calcium oxide, magnesium oxide, anhydrous gypsum, etc. used in the examples of the present invention may be obtained by commercial means, such as by the chemical industry of the ridge, komio, guo, etc.
Preferably, the weight percentage of the calcium oxide (particularly free calcium oxide) in the functional component is 70-100%. Further, the content of calcium oxide is 75%, 80%, 85%, 90% or 95% or more. The weight percentage refers to the weight ratio of the weight of the calcium oxide in the whole functional component. That is, it is not mandatory that the calcium oxide is 100% in content, and some other functional component may be contained as long as the functional component is also water-reactive.
In another embodiment, the functional component comprises 70% to 100% by weight of anhydrite. Further, the content of the anhydrous gypsum is 75%, 80%, 85%, 90% or 95% or more. Other water reactive components such as calcium oxide, magnesium oxide, etc. may be selected for the remainder.
In another embodiment, the functional component comprises 60-80 weight percent calcium oxide and 20% -40 weight percent anhydrite.
The dispersion component is not particularly limited as long as it does not react with water.
The dispersing component may be at least partially selected from water-evolving substances, for example 10% or 15%, 20%, 25%, 30% or more of the water-evolving substances, the remainder being inert components which do not react with water.
Preferably, the dispersing component is at least partially water-insoluble or poorly water-soluble, meaning that the solubility in water is less than 0.01g/100g at 20 ℃. The lower the solubility, the more advantageous the anti-caking properties, for example, a solubility of less than 0.001g/100g may be further preferred. The content of the water-insoluble or poorly water-soluble substance in the dispersed component is preferably 10% or more, more preferably 15%, 20%, 25% or 30% or more by weight.
In some embodiments, the dispersing component comprises one or more of calcium carbonate, silicon dioxide, tricalcium phosphate, calcium sulfite, aluminum oxide, ferric oxide, magnesium carbonate, and titanium dioxide, and optionally other inert components which do not react with water, wherein the total content is 100%. The calcium carbonate is CaCO as main chemical component 3 Comprises one or more of common calcium carbonate, light calcium carbonate and heavy calcium carbonate. The calcium sulfite is CaSO as main chemical component 3 Comprises calcium sulfite, calcium sulfite hemihydrate. The silicon dioxide is mainly composed of SiO 2 In addition to commercially available silica of various purities, it also contains quartz powder, glass powder, ceramic powder, diatomaceous earth, fine sand powder, black age float, kaolin, etc. The other components are analogized in sequence, and all refer to materials with the main chemical components being related substances.
The above components of the present invention may be prepared by themselves or may be obtained from commercial sources, such as by the chemical industry of the ridge, ke Mi Ou, guo Yao, shengmai, etc.
As an illustration, the following embodiments are given as particularly preferred examples, the dispersing component comprising 60% to 100% by weight of calcium carbonate, the remainder being other inert components that are not reactive with water; the dispersing component comprises tricalcium phosphate with the weight percentage of 60-100 percent, and the rest is other inert components which do not react with water; the dispersing component comprises 40-100% by weight of silicon dioxide, and the balance of other inert components which do not react with water; the dispersing component comprises 30-65% of silicon dioxide, 15-35% of aluminum oxide and the balance of other inert components which do not react with water; the dispersing component comprises 5-35% of calcium carbonate and 5-65% of calcium sulfite by weight percent, and the balance is other inert components which do not react with water; the dispersing component comprises calcium carbonate, calcium sulfite, and other inert components that are not reactive with water, and calcium carbonate: calcium sulfite: the weight proportion of other inert components which do not react with water is 2-4:1-5:2-4. In a preferred embodiment, the other inert component that does not react with water is calcium sulfate or calcium sulfate dihydrate.
For the avoidance of doubt, by way of example, where the "dispersed component comprises 60% to 100% by weight of calcium carbonate, the remainder being other inert components which are not reactive with water", when the calcium carbonate content is 100%, this means that no other inert components which are not reactive with water are required, but when the calcium carbonate content is less than 100%, this means that there is also a need for other inert components which are not reactive with water, i.e. the content of other inert components which are not reactive with water is from 0 to 40%, the total content of calcium carbonate and other inert components which are not reactive with water being 100%.
Preferably, the dispersing component comprises 5% to 35% by weight of calcium carbonate and 5% to 65% by weight of calcium sulfite, the balance being other inert components that are not reactive with water, and the calcium carbonate: calcium sulfite: the weight proportion of other inert components which do not react with water is 2-4:1-5:2-4. Preferably, the other inert component that does not react with water is calcium sulfate or calcium sulfate dihydrate.
Further, the weight percentage of the functional components is 5-70%, and the weight percentage of the dispersing components is 30-95%; preferably, the weight percentage of the functional components is 10-40%, and the weight percentage of the dispersing components is 60-90%; further preferably, the functional component weight percentage is 15% -30%, and the dispersing component weight percentage is 70-85%. The method comprises the steps of carrying out a first treatment on the surface of the Particularly preferably, the functional component is present in an amount of 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19% or 20% by weight or more; preferably, the weight percentage of the functional components is below 40%, 35%, 30%, 29% or 28%. Preferably, the weight percentage of the dispersed component is above 60%, 65%, 70%, 71% or 72%; preferably, the dispersed component is present in an amount of 89%, 88%, 87%, 86%, 85%, 84%, 83%, 82%, 81% or 80% by weight or less. The functional components are too many, the reaction can be more severe, and adverse effects are caused on the fluidity of slurry, the performance of soil curing agent and the like. The contents according to the invention are all percentages by weight, unless otherwise specified, and all the component contents add up to 100%.
Further, the density of the anti-caking agent is 1-4g/cm 3 Preferably 1-3g/cm 3 Further preferably 1.5 to 2.5g/cm 3 。
Further, the fineness of the anti-caking agent is 200-2500 mesh, preferably 400-2000 mesh. The fineness of the anti-caking agent is particularly preferably 500 mesh, 550 mesh, 600 mesh, 650 mesh, 700 mesh, 750 mesh, 800 mesh, 850 mesh or 900 mesh or more. The fineness of the anti-caking agent is preferably 1900 meshes, 1800 meshes, 1700 meshes, 1600 meshes and below 1500 meshes.
Further, the specific surface area of the anti-caking agent is 800cm 2 Above/g, preferably 2000-6000cm 2 And/g. The specific surface area of the anti-caking agent is preferably 2500cm 2 /g、3000cm 2 /g、3500cm 2 And/g. The specific surface area of the anti-caking agent is preferably 5500cm 2 /g、5000cm 2 /g、4500cm 2 And/g or less.
The anti-caking agent is used for soil body curing agents, dry-mixed mortar, construction powder for stirring piles, construction slurry for stirring piles, filling materials, backfilling materials and roadbed materials.
A premix comprising wet solid waste and the aforementioned anti-caking agent. Wet solid waste is solid waste containing a certain amount of water/adhering water, and particularly solid waste that tends to agglomerate or agglomerate during use, and specifically solid waste having a water content of 0.5% or more, particularly solid waste having a water content of 1% or more, and solid waste having a water content of 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15% or more defined above is also within this range.
Anti-caking agents have been described above. Specifically, the anti-caking agent comprises a functional component and a dispersing component; the functional component is a water-reactive component; the dispersing component is an inert component and does not react with water. For more details, see the description above regarding anti-caking agents.
The addition weight ratio of the wet solid waste to the anti-caking agent is 10:1-1:3, preferably 5:1-1:2, and more preferably 3:1-1:1. From the aspect of the net pulp fluidity, the proportion can ensure the better net pulp fluidity.
Further, the moisture content of the wet solid waste is 3%, 4%, 5%, 6%, 7%, 8%, 9% or 10% or more; preferably 3% to 40%, still preferably 5% to 30%, further preferably 10% to 20%.
In some embodiments, the wet solid waste is selected from one or more of carbide slag, industrial by-product gypsum, aluminum slag, red mud, waste stone dust. Further, the industrial byproduct gypsum is selected from one or more of desulfurized gypsum, phosphogypsum, titanium gypsum, fluorine gypsum, citric acid gypsum and salt gypsum.
In some embodiments, the premix is a 2.36mm standard sieve with a screen residue of 20% or less, preferably 10% or less, more preferably 5%, 4%, 3%, 2%, 1% or less. Preferably, after 7 days of the premix is placed, a 2.36mm standard sieve is used, with a screen residue of 20% or less, preferably 10% or less, more preferably 5%, 4%, 3%, 2%, 1% or less. The long-term standing still has low screening allowance, which proves that the anti-caking agent has excellent performance and can ensure long-term transportation or storage of materials.
A method of preparing a premix, mixing the solid waste with an anti-caking agent. Generally, solid waste with water content of more than 0.5%, especially solid waste with water content of more than 1%, is easy to cause agglomeration and caking, and the premixing is mainly to treat solid waste with higher water content. Of course, all or part of the other solid waste with low water content can be premixed together. Furthermore, it is possible to select to premix part of the cement, even the admixture/auxiliary agent, at the same time, so long as the aforementioned inventive concept of treating the agglomeration and agglomeration of the solid waste with a relatively high water content is not affected, and it is within the scope of the present invention to premix part of other various raw materials or all of some raw materials.
A soil body curing agent, which contains the anti-caking agent. Soil curing agents are known in the art, for example, inorganic binders are a conventional curing material, including cement, lime, fly ash, etc., which may be used alone or in a mixture in a certain ratio. The ionic soil curing agent is a chemical substance formed by combining a plurality of strong ions. Organic soil curing agents are generally in liquid form and are of various types, and currently known products in the market include: kang Nai (CON-AID) from Johness burg, S-type stabilizer from SOILROCK, USA, TOP-SEAL, etc. Various curing agents are mixed and used in some use scenes, and other substances such as solid waste are added in some use scenes. However, in any case, the anti-caking agent according to the present invention may be added as long as the raw material has a high water content. In particular, it is effective to add solid waste having a water content of 1% or more.
Further, a soil body curing agent is provided, which contains an anti-caking agent, wet solid waste, a mineral additive, optional cement, optional auxiliary agent and optional incineration ash; the wet solid waste has the definition as described above.
The type of the solid waste is not particularly limited as long as it is suitable for application in the field of soil hardening agents and the field of dry-mixed mortar.
Further, the wet solid waste is selected from one or more of carbide slag, industrial byproduct gypsum, aluminum slag, red mud and waste stone powder. Further, the industrial byproduct gypsum is selected from one or more of desulfurized gypsum, phosphogypsum, titanium gypsum, fluorine gypsum, citric acid gypsum and salt gypsum. The moisture content of the wet solid waste is 3%, 4%, 5%, 6%, 7%, 8%, 9% or more than 10%; preferably 3% to 40%, still preferably 5% to 30%, further preferably 10% to 20%.
Further, the mineral additive is one or more selected from copper slag powder, phosphorus slag powder, fly ash, steel slag, natural zeolite and silica fume. The incineration ash is selected from one or more of sludge incineration ash and garbage incineration ash. The auxiliary agent is one or more selected from accelerator, water reducer, enhancer and flocculant.
For the soil body curing agent, the preferable formula is as follows: comprises the following raw materials in percentage by weight: 5-25% of anti-caking agent, 15-35% of wet solid waste, 25-50% of mineral admixture, 0-30% of cement, 0-10% of auxiliary agent and 0-15% of incineration ash.
If a cement-based soil body curing agent is adopted, the soil body curing agent comprises the following raw materials in percentage by weight: 10-20% of anti-caking agent, 20-30% of wet solid waste, 30-45% of mineral admixture, 15-30% of cement, 0-10% of auxiliary agent and 0-15% of incineration ash.
In one scheme, the preparation method of the soil body curing agent comprises the steps of (1) pre-mixing wet solid waste and an anti-caking agent to obtain a premix; (2) A step of mixing the premix with a mineral admixture, optionally cement, optionally an auxiliary agent, optionally incineration ash.
In another embodiment, a soil body setting agent is provided, comprising the foregoing premix. The premix contains wet solid waste and an anti-caking agent, so that the raw materials with larger influence on caking and caking are divided independently, and the influence of the high-water-content raw materials on the whole curing agent is reduced.
Further, a soil body curing agent is provided, which comprises the premix, a mineral admixture, optional cement, optional auxiliary agents and optional incineration ash.
Further, the mineral additive is one or more selected from copper slag powder, phosphorus slag powder, fly ash, steel slag, natural zeolite and silica fume. The incineration ash is selected from one or more of sludge incineration ash and garbage incineration ash. The auxiliary agent is one or more selected from accelerator, water reducer, enhancer and flocculant.
In a preferred scheme, the soil body curing agent comprises the following raw materials in percentage by weight: 20-50% of premix, 25-50% of mineral admixture, 0-30% of cement, 0-10% of auxiliary agent and 0-15% of incineration ash.
For the cement-based soil body curing agent, the soil body curing agent comprises the following raw materials in percentage by weight: 30-40% of premix, 30-45% of mineral admixture, 15-30% of cement, 0-10% of auxiliary agent and 0-15% of incineration ash.
Also provided is a method for preparing soil body curing agent, which comprises the step of mixing wet solid waste and the anti-caking agent to obtain a premix. As mentioned above, the premixing is mainly to treat the solid waste with higher water content. Of course, all or part of the other solid waste with low water content can be premixed together. Furthermore, it is possible to select to premix part of the cement, even the admixture/auxiliary agent, at the same time, so long as the aforementioned inventive concept of treating the agglomeration and agglomeration of the solid waste with a relatively high water content is not affected, and it is within the scope of the present invention to premix part of other various raw materials or all of some raw materials.
Further, a preparation method of a soil body curing agent is provided, which comprises (1) mixing mineral admixture, optional cement, optional auxiliary agent and optional incineration ash to form a material A; (2) taking the premix as a material B; (3) mixing the material A and the material B. The materials A and B are only indicated, and the terms of materials A and B can be used.
A construction powder for a stirring pile, which contains the anti-caking agent, or contains the premix or the soil body curing agent. Typically, the powder may be prepared as follows: taking materials according to weight percentage, mixing wet solid waste and an anti-caking agent according to weight ratio in advance to obtain a premix, mixing and grinding until the 0.08mm sieve allowance is less than 10 percent to obtain dry powder, adding the low-water-content solid waste (if any), the functional additive (if any), the cement (if any) and the like into the dry powder under stirring, and stirring uniformly to obtain the construction powder. Furthermore, the construction powder for the stirring pile prepared by the method is prepared into slurry with the water cement ratio of 0.6-2.0, and can be applied to the stirring pile prepared by blending with foundation soil. When the method is applied, construction equipment such as double-shaft, three-shaft and six-shaft stirring piles, jet grouting piles and the like are adopted, and the pile is fully stirred with foundation soil for preparation.
A construction slurry for a stirring pile, which contains the anti-caking agent, or contains the premix or the soil body curing agent. Typically, the slurry may be prepared as follows: taking materials according to weight percentage, mixing wet solid waste and an anti-caking agent according to weight ratio in advance to obtain a premix, adding water to blend to prepare slurry, adding low-water-content solid waste (if any), functional additive (if any) and cement (if any) into the slurry, and stirring uniformly to obtain the construction slurry. Furthermore, the construction slurry for the stirring pile prepared by the method is prepared into slurry with the water cement ratio of 0.6-2.0, and can be applied to the stirring pile prepared by blending with foundation soil. Specifically, when in use, water is added and stirred to prepare slurry with the water-cement ratio of 0.6-2.0, and construction equipment such as double-shaft, three-shaft and six-shaft stirring piles, jet grouting piles and the like are adopted to fully stir with foundation soil for preparation.
The low-moisture content solid waste refers to solid waste with a moisture content of less than 1%, and is dry and does not cause caking or caking, so that the low-moisture content solid waste can be used without mixing with an anti-caking agent like wet solid waste. Of course, it is not excluded here that it is used after premixing with the anti-caking agent.
A solidified soil comprising the anti-caking agent or the premix or the soil solidifying agent. The soil to be solidified is not particularly limited, and may be loess, black soil, saline-alkali soil or the like. And adding the soil body curing agent into the soil, or fully stirring the soil body curing agent with foundation soil by using construction equipment such as double-shaft, three-shaft and six-shaft stirring piles, jet grouting piles and the like, so as to obtain the cured soil.
The invention also provides a filling material which contains the anti-caking agent or the premix or the soil body curing agent.
The invention also provides a backfill material which contains the anti-caking agent or the premix or the soil body curing agent.
The invention also provides a roadbed material which contains the anti-caking agent or the premix or the soil body curing agent.
Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
(1) Before the invention, the soil body curing agent field and the dry-mixed mortar field have no special anti-caking agent to solve the caking and caking problems of raw materials. The invention well solves the problems of agglomeration and caking of raw materials by reasonably selecting raw materials and combining functional components and dispersing components.
(2) The independent use of water reactive raw materials such as calcium oxide has poor effect, serious heat release, overlarge expansion rate and the like, and the invention creatively adapts the functional components to inert dispersed components, so that the performance is better.
(3) In the existing curing agent and dry-mixed mortar formula, water reactive components can be directly introduced, but the curing agent and dry-mixed mortar mainly focuses on curing performance or removes water in soil, and has no effect on solving the anti-caking problem.
(4) The anti-caking agent of the present invention differs from the pH-adjusting additive in that the pH value does not actually have a significant effect on the prevention of caking or caking. That is, the present invention does not require a specific pH value to be prepared, and is convenient in production.
Drawings
FIG. 1 is a morphology of a soil body curing agent without an anti-caking agent added after 1 day; 1a is a state that soil curing agents are all poured into a tray; 1b is the remaining particles after passing through a 2.36mm sieve;
FIG. 2 is the remaining particles after 2.36mm screen after 1 day of soil curing agent added with anti-caking agent;
FIG. 3 is a morphology of a soil body curing agent without an anti-caking agent added after 2 days of standing; 3a is the state that the soil body curing agent is in the bag; 3b is the remaining particles after passing through a 2.36mm sieve;
FIG. 4 is a morphology of a soil body curing agent without an anti-caking agent added after 7 days;
FIG. 5 is the remaining particles after 7 days of 2.36mm screen placement of the soil curing agent with anti-caking agent added.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
In the experiment, the calcium oxide is analytically pure and is purchased from the chemical industry of the ridge science; magnesia was analytically pure, purchased from komiou; silica is analytically pure and available from the chemical industry of the ridge science; tricalcium phosphate is analytically pure, purchased from komiou; the gypsum is selected from industrial byproduct gypsum with different water contents; anhydrous gypsum, calcium carbonate, calcium sulfite, and calcium sulfate dihydrate are all purchased from national medicines; quartz powder is purchased from a fine ore processing plant.
Example 1:
and testing the anti-caking effect of the anti-caking agent. Mixing 25% of calcium oxide with 75% of silicon dioxide according to the weight percentage to obtain the anti-caking agent.
For the test without addition of anti-caking agent: mixing 20% of cement, 40% of slag powder and 40% of gypsum with the water content of 9.2% to obtain the soil body curing agent. The appearance after 1 day is shown in figure 1, the whole package of materials is hardened under the condition of no disturbance, and the screen residue after sieving is soft and can be manually crushed. The appearance after 2 days is shown in figure 3, and most of the whole package material is hardened into a piece under the condition of no disturbance, and can be manually kneaded. The appearance after being placed for 7 days is shown in fig. 4, and the whole package of materials is hardened into one piece under the condition of no disturbance, and can be manually kneaded, but the consolidation hardness is higher.
For the test of adding anti-caking agent: mixing an anti-caking agent and gypsum with a water content of 9.2% according to a weight ratio of 1:2 to obtain a premix; and mixing 20% of cement, 40% of slag powder and 40% of premix to obtain the soil body curing agent. The appearance after 1 day is shown in figure 2 (appearance after sieving), the whole package material is soft without disturbance, hardening does not occur, and the sieving residue is less. After 2 days of standing, the whole package material is soft without disturbance, hardening does not occur, and the screen residue after screening is less. After 7 days, the materials are sieved by a sieve with 2.36mm (see figure 5), the whole package of materials is soft without disturbance, hardening does not occur, and the screen residue after sieving is less.
Example 2:
and (5) pre-mixing effect experiment.
Anti-caking agents referred to as A1 and A3 in Table 1: the functional component is calcium oxide, and the dispersion component is silicon dioxide; the functional component accounts for 10 percent and the dispersing component accounts for 90 percent (weight percent).
Anti-caking agent referred to as A2 in Table 1: the functional components are 70% calcium oxide and 30% anhydrous gypsum, and the dispersion component is silicon dioxide; the functional component accounts for 10 percent and the dispersing component accounts for 90 percent (weight percent).
For A1, A2: mixing the anti-caking agent with gypsum with the water content of 7.2% in advance to obtain a premix, standing for 3 days, and mixing the premix with cement and slag powder to obtain the soil body curing agent. For A3: directly mixing cement, slag powder, an anti-caking agent and gypsum with the water content of 7.2% to obtain a soil body curing agent, and standing for 3 days.
The curing agent is adopted to reinforce the silt, the mixing amount of the curing agent is 12 percent, the water-gel ratio is 0.6, (namely, the water accounts for the percentage of the curing agent) is 0.6, and the liquid limit of the silt is 32 percent. The compressive strength of 7d is tested according to the compressive strength test method of B.2 in JGJ/T233-2011; the test results are recorded in table 1.
Table 1 soil body curing agent soil reinforcement test results.
It can be seen from table 1 that the anti-caking agent, if premixed with wet solid waste, will contribute to an improvement in product performance. For the functional component, the calcium oxide has stronger water absorption, but a small amount of anhydrous calcium sulfate with weaker water absorption is observed to be mixed, which is helpful for improving the performance of the product.
Example 3:
anti-caking agent in table 2: the functional component is calcium oxide, and the dispersion component is quartz powder (the main component is silicon dioxide); the functional component accounts for 25 percent and the dispersing component accounts for 75 percent (weight percent).
For A4, cement, slag powder and gypsum with the water content of 6.2% are directly mixed to obtain a soil body curing agent, and the soil body curing agent is prepared by mixing materials on the same day, before 1 day (1 d), before 2 days (2 d), before 3 days (3 d) and before 7 days (7 d), and then sieving the mixture by a 2.36mm sieve, and the results are recorded in Table 2.
For A5, mixing an anti-caking agent with gypsum with a water content of 6.2% to obtain a premix, mixing the premix with cement and slag powder to obtain a soil body curing agent, and screening by a 2.36mm screen in a manner of mixing the materials on the same day, mixing the materials before 1 day (1 d), mixing the materials before 2 days (2 d), mixing the materials before 3 days (3 d) and mixing the materials before 7 days (7 d), wherein the screen residue is shown in Table 2.
Table 2 soil body curing agent pass through 2.36mm sieve test results.
It can be seen from table 2 that if the anti-caking agent is not added, the longer the soil curing agent is placed, the more serious the caking is, which is very unfavorable for the storage and transportation of the soil curing agent. In contrast, the soil hardening agent added with the anti-caking agent shows very good stability.
Example 4:
anti-caking agent referred to as G1 in Table 3: according to the following calcium sulfite: mixing calcium carbonate in a weight ratio of 4:2 to obtain a dispersed component, and then mixing 25% of calcium oxide with 75% of the dispersed component according to the weight percentage content to obtain the anti-caking agent.
Anti-caking agent referred to as G2 in table 3: according to calcium sulfate dihydrate: calcium sulfite: mixing calcium carbonate in a weight ratio of 2:4:2 to obtain a dispersed component, and then mixing 25% of calcium oxide with 75% of the dispersed component according to the weight percentage content to obtain the anti-caking agent.
Anti-caking agent referred to as G3 in table 3: according to calcium sulfate dihydrate: calcium sulfite: mixing calcium carbonate in a weight ratio of 4:4:2 to obtain a dispersed component, and then mixing 25% of calcium oxide with 75% of the dispersed component according to the weight percentage content to obtain the anti-caking agent.
The anti-caking agent in the test is selected from the anti-caking agents corresponding to Table 3, the dispersing component and the functional component are firstly mixed for 5min in a planetary mode according to the weight ratio of Table 3 to prepare the anti-caking agent, the anti-caking agent and the industrial byproduct gypsum are mixed for 15min in a gravity-free mode to obtain a premix, and then the premix is mixed with cement (Pinghu south PO 42.5) and slag powder in a strong dispersing mode for 5min to prepare the soil body curing agent.
According to the water-cement ratio of 1.8; 18% of soil body curing agent; the 25m silt clay of the airport tie line construction site with the liquid limit of 38 percent is adopted. Soil liquid limit test refers to JGJT233-2011 cement soil mix proportion design rule, hardened soil mix proportion design and unconfined compressive strength test refers to DGTJ 08-2082-2017GS soil hardener application technical rule and JGJT233-2011 cement soil mix proportion design rule.
TABLE 3 unconfined compressive Strength test results for hardened soil
After screening experiments on the dispersed components, the combination of calcium sulfate dihydrate, calcium sulfite and calcium carbonate has better performance. Further, as can be seen from Table 3, when the content of calcium sulfate dihydrate in the dispersed component is properly increased, it is helpful to improve the curing agent properties, especially the 90d compressive strength data.
Example 5:
anti-agglomerating agents referred to in table 4 as G5: according to the following calcium sulfite: mixing calcium carbonate in a weight ratio of 4:2 to obtain a dispersed component, and then mixing 25% of calcium oxide with 75% of the dispersed component according to the weight percentage content to obtain the anti-caking agent.
Anti-caking agent referred to as G6 in table 4: according to calcium sulfate dihydrate: calcium sulfite: mixing calcium carbonate in a weight ratio of 3:4:2 to obtain a dispersed component, and then mixing 25% of calcium oxide with 75% of the dispersed component according to the weight percentage content to obtain the anti-caking agent.
Anti-caking agent according to G7 in table 4: according to calcium sulfate dihydrate: calcium sulfite: mixing the calcium carbonate in a weight ratio of 5:4:2 to obtain a dispersed component, and then mixing 25% of calcium oxide with 75% of the dispersed component according to the weight percentage content to obtain the anti-caking agent.
The proportion of the corresponding anti-caking agent in the table 4 is selected in the test, the dispersing component and the functional component are firstly mixed for 5min in a planetary mode according to the weight proportion of the table 4 to prepare the anti-caking agent, the anti-caking agent and the industrial byproduct gypsum are mixed for 15min in a gravity-free mixing mode to obtain a premix, and then the premix, cement (Pinghu south PO 42.5) and slag powder are mixed for 5min in a strong dispersing mode to prepare the soil body curing agent.
According to the water-cement ratio of 0.6; the mixing amount of the soil body curing agent is 10%; 8m of silt clay is adopted in the airport tie line construction site, and the liquid limit is 36%. Soil liquid limit test method refers to JGJT233-2011 cement soil mix proportion design rules, hardened soil mix proportion design and unconfined compressive strength test reference standards of DGTJ 08-2082-2017GS soil hardener application technical rules and JGJT233-2011 cement soil mix proportion design rules.
TABLE 4 unconfined compressive Strength of hardened soil
As can be seen from table 4, even if the applicable scenario is changed, the presence of calcium sulfate dihydrate in the anti-caking agent dispersion component still contributes to the curing agent performance, but the effect of the improvement is no longer evident when the calcium sulfate dihydrate content is increased to a certain level.
Example 6:
the ingredients were carried out according to table 5. Wherein, the anti-caking agent is involved in J1-J5: according to the weight percentage, the ceramic powder is obtained by mixing 25 percent of calcium oxide with 75 percent of quartz powder; anti-agglomerating agents involved in J6: the calcium phosphate is prepared by mixing 25% of calcium oxide with 75% of tricalcium phosphate according to weight percentage.
The specific operation is as follows: and (3) mixing gypsum with the water content of 6.3% with an anti-caking agent by adopting gravity-free stirring for 15min to obtain a premix, and then carrying out strong dispersion and mixing on the premix and the Fengxian PO 42.5-grade (urban construction) cement and slag powder for 5min to obtain the soil body curing agent. The fluidity of the net pulp is tested with reference to the standard DGTJ 08-2082-2017GS soil hardener application Specification, recorded in Table 5.
TABLE 5 soil mass curing agent net paste fluidity test results
From Table 5, it can be seen that from the viewpoint of the fluidity of the slurry, the mass ratio of the wet solid waste (gypsum) to the anti-caking agent should be controlled to be 3:1 to 1:3, more preferably 2:1 to 1:1.
Example 7:
waste stone powder in stone factories: in the stone processing process, stone powder generated after stone is sawed is formed by adopting circulating water treatment and secondary precipitation, and the water content is generally in the range of 10-30%. The water content of the waste stone powder used in the test was 15%.
The anti-caking agents in Table 6 were selected as follows: s1 calcium oxide, S2 calcium oxide, tricalcium phosphate, S3 calcium oxide, calcium carbonate and S4 calcium oxide, and quartz powder. The test was carried out according to the proportions of Table 6, mixing the anti-caking agent with the waste stone dust and sieving through a 2.36mm sieve.
TABLE 6 premix run out test results
As can be seen from Table 6, the simple addition of calcium oxide, the rapid reaction exotherm, eventually forming a lump. After tricalcium phosphate, calcium carbonate and quartz powder are mixed into calcium oxide, the screen residue of the premix is greatly reduced.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (30)
1. An anti-caking agent for a soil body curing agent is characterized by comprising a functional component and a dispersing component; wherein the functional component is a water reactive component; the dispersing component is an inert component and does not react with water;
the functional component comprises one or more of calcium oxide, magnesium oxide, anhydrous gypsum and semi-hydrated gypsum;
the dispersing component comprises one or more of calcium carbonate, silicon dioxide, tricalcium phosphate, calcium sulfite, aluminum oxide, ferric oxide, magnesium carbonate and titanium dioxide.
2. The anti-caking agent according to claim 1, characterized in that,
the functional component comprises 70-100 weight percent of calcium oxide;
Or, the functional component comprises 70-100% of anhydrous gypsum by weight percent;
or the functional component comprises 60-80 weight percent of calcium oxide and 20-40 weight percent of anhydrous gypsum.
3. An anti-caking agent according to claim 1 wherein the dispersing component is at least partially water-insoluble or poorly water-soluble, i.e. having a solubility in water of less than 0.01g/100g at 20 ℃.
4. The anti-caking agent according to claim 1, characterized in that,
the dispersing component comprises 60-100% of calcium carbonate by weight percent, and the balance of other inert components which do not react with water;
or, the dispersing component comprises tricalcium phosphate with the weight percentage of 60-100%, and the rest is other inert components which do not react with water;
or, the dispersing component comprises 40-100% by weight of silicon dioxide, and the balance is other inert components which do not react with water;
or, the dispersion component comprises 30-65% by weight of silicon dioxide, 15-35% by weight of aluminum oxide, and the balance of other inert components which are not reacted with water;
or, the dispersing component comprises 5-35% of calcium carbonate and 5-65% of calcium sulfite by weight percent, and the balance is other inert components which do not react with water;
Alternatively, the dispersing component comprises calcium carbonate, calcium sulfite, and other inert components that are not reactive with water, and the calcium carbonate: calcium sulfite: the weight proportion of other inert components which do not react with water is 2-4:1-5:2-4.
5. The anti-caking agent according to claim 1, wherein the functional component comprises 5-70% by weight and the dispersing component comprises 30-95% by weight.
6. The anti-caking agent according to claim 1 wherein the anti-caking agent satisfies one or more of the following conditions:
(1) Density of 1-4g/cm 3 ；
(2) The fineness is 200 meshes-2500 meshes;
(3) Specific surface area 800cm 2 And/g.
7. The use of the anti-caking agent according to any one of claims 1 to 6 for soil body curing agents, dry-mixed mortar, construction powder for stirring piles, construction slurry for stirring piles, filling materials, backfilling materials, anti-caking or anti-caking of roadbed materials.
8. A premix comprising wet solid waste and the anti-caking agent according to any one of claims 1 to 6, wherein the wet solid waste is solid waste having a water content of 1% or more; the moisture content of the wet solid waste is 3% -20%.
9. Premix according to claim 8, wherein the wet solid waste and the anti-caking agent are added in a weight ratio of 10:1-1:3.
10. The premix of claim 8, wherein the wet solid waste is selected from one or more of carbide slag, industrial byproduct gypsum, aluminum slag, red mud, waste stone dust.
11. Premix according to claim 8, characterized in that the premix is used with a standard sieve of 2.36mm, the screen surplus being below 20%.
12. A method of preparing a premix according to any one of claims 8 to 11, wherein the wet solid waste and the anti-caking agent are mixed.
13. The method of claim 12, wherein the mixing is by milling.
14. A soil body curing agent, characterized by comprising the anti-caking agent according to any one of claims 1 to 6.
15. The soil body curing agent according to claim 14, comprising an anti-caking agent, wet solid waste, mineral admixture, optionally cement, optionally auxiliary agent, optionally incineration ash; the wet solid waste is solid waste with the water content of more than 1%; the moisture content of the wet solid waste is 3% -20%.
16. The soil body curing agent according to claim 15, wherein the wet solid waste is selected from one or more of carbide slag, industrial byproduct gypsum, aluminum slag, red mud, and waste stone powder.
17. A soil body setting agent as claimed in claim 15 wherein the soil body setting agent meets one or more of the following conditions:
(1) The mineral additive is one or more selected from copper slag powder, phosphorus slag powder, fly ash, steel slag, natural zeolite and silica fume;
(2) The incineration ash is selected from one or more of sludge incineration ash and garbage incineration ash;
(3) The auxiliary agent is one or more selected from accelerator, water reducer, reinforcing agent and flocculant;
(4) Comprises the following raw materials in percentage by weight: 5-25% of anti-caking agent, 15-35% of wet solid waste, 25-50% of mineral admixture, 0-30% of cement, 0-10% of auxiliary agent and 0-15% of incineration ash.
18. The soil body solidifying agent according to claim 15, wherein the soil body solidifying agent comprises the following raw materials in percentage by weight: 10-20% of anti-caking agent, 20-30% of wet solid waste, 30-45% of mineral admixture, 15-30% of cement, 0-10% of auxiliary agent and 0-15% of incineration ash.
19. A method of preparing a soil body solidifying agent according to any one of claims 14 to 18, comprising (1) a step of pre-mixing wet solid waste and an anti-caking agent to obtain a premix; (2) A step of mixing the premix with a mineral admixture, optionally cement, optionally an auxiliary agent, optionally incineration ash.
20. Soil body curing agent, characterized in that it comprises a premix according to any one of claims 8 to 11;
or, a premix prepared by the method of claim 12 or 13.
21. A soil body setting agent as claimed in claim 20 comprising said premix, mineral admixture, optionally cement, optionally auxiliary agent, optionally incineration ash.
22. A soil body setting agent as claimed in claim 21 wherein the soil body setting agent meets one or more of the following conditions:
(1) The mineral additive is one or more selected from copper slag powder, phosphorus slag powder, fly ash, steel slag, natural zeolite and silica fume;
(2) The incineration ash is selected from one or more of sludge incineration ash and garbage incineration ash;
(3) The auxiliary agent is one or more selected from accelerator, water reducer, reinforcing agent and flocculant;
(4) Comprises the following raw materials in percentage by weight: 20-50% of premix, 25-50% of mineral admixture, 0-30% of cement, 0-10% of auxiliary agent and 0-15% of incineration ash.
23. The soil body solidifying agent according to claim 21, wherein the soil body solidifying agent comprises the following raw materials in percentage by weight: 30-40% of premix, 30-45% of mineral admixture, 15-30% of cement, 0-10% of auxiliary agent and 0-15% of incineration ash.
24. A method of preparing a soil body setting agent as claimed in any one of claims 20 to 23 comprising (1) mixing a mineral admixture, optionally cement, optionally an auxiliary agent, optionally incineration ash to form a material a; (2) taking the premix as a material B; (3) mixing the material A and the material B.
25. Construction powder for stirring piles, characterized by containing an anti-agglomerating agent according to any one of claims 1 to 6 or a premix according to any one of claims 8 to 11 or a soil hardening agent according to any one of claims 14 to 18, 20 to 23.
26. Construction slurry for stirring piles, characterized by containing the anti-caking agent according to any one of claims 1 to 6 or the premix according to any one of claims 8 to 11 or the soil hardening agent according to any one of claims 14 to 18, 20 to 23.
27. A solidified soil comprising an anti-caking agent according to any one of claims 1 to 6 or a premix according to any one of claims 8 to 11 or a soil solidifying agent according to any one of claims 14 to 18, 20 to 23.
28. A filling material comprising an anti-caking agent according to any one of claims 1 to 6 or a premix according to any one of claims 8 to 11 or a soil body setting agent according to any one of claims 14 to 18, 20 to 23.
29. Backfill material comprising an anti-caking agent according to any one of claims 1 to 6 or a premix according to any one of claims 8 to 11 or a soil body setting agent according to any one of claims 14 to 18, 20 to 23.
30. A subgrade material comprising an anti-caking agent according to any one of claims 1 to 6 or a premix according to any one of claims 8 to 11 or a soil body solidifying agent according to any one of claims 14 to 18, 20 to 23.
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| CN101333329A (en) * | 2008-08-06 | 2008-12-31 | 中国石化仪征化纤股份有限公司 | Method for making polyester for low-haze biaxial stretching polyester film |
| KR20150037175A (en) * | 2013-09-30 | 2015-04-08 | 유한회사 홍주 | Solidified agent using red mud and manufacturing method of the same |
| CN109111534A (en) * | 2018-06-26 | 2019-01-01 | 青岛科技大学 | A kind of method that temperature-gradient method prepares haloflex |
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| CN101333329A (en) * | 2008-08-06 | 2008-12-31 | 中国石化仪征化纤股份有限公司 | Method for making polyester for low-haze biaxial stretching polyester film |
| KR20150037175A (en) * | 2013-09-30 | 2015-04-08 | 유한회사 홍주 | Solidified agent using red mud and manufacturing method of the same |
| CN109111534A (en) * | 2018-06-26 | 2019-01-01 | 青岛科技大学 | A kind of method that temperature-gradient method prepares haloflex |
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