CN101898885A - Composite of fluorgypsum and fly ash as concrete cementing material - Google Patents
Composite of fluorgypsum and fly ash as concrete cementing material Download PDFInfo
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- CN101898885A CN101898885A CN2010102176908A CN201010217690A CN101898885A CN 101898885 A CN101898885 A CN 101898885A CN 2010102176908 A CN2010102176908 A CN 2010102176908A CN 201010217690 A CN201010217690 A CN 201010217690A CN 101898885 A CN101898885 A CN 101898885A
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- fluorgypsum
- concrete
- fly ash
- flyash
- cement
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- 239000004567 concrete Substances 0.000 title claims abstract description 54
- 239000010881 fly ash Substances 0.000 title claims abstract description 54
- 239000000463 material Substances 0.000 title claims abstract description 42
- 239000002131 composite material Substances 0.000 title description 3
- 239000004568 cement Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000012986 modification Methods 0.000 claims description 17
- 230000004048 modification Effects 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 239000007858 starting material Substances 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 abstract description 12
- 238000002156 mixing Methods 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 238000003756 stirring Methods 0.000 abstract description 4
- 239000004575 stone Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 230000005284 excitation Effects 0.000 abstract 1
- 150000004673 fluoride salts Chemical class 0.000 abstract 1
- 239000002440 industrial waste Substances 0.000 abstract 1
- 239000011150 reinforced concrete Substances 0.000 abstract 1
- 230000001988 toxicity Effects 0.000 abstract 1
- 231100000419 toxicity Toxicity 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- 230000007797 corrosion Effects 0.000 description 13
- 238000005260 corrosion Methods 0.000 description 13
- 150000003839 salts Chemical class 0.000 description 13
- 229910052742 iron Inorganic materials 0.000 description 9
- 230000003014 reinforcing effect Effects 0.000 description 6
- 241000370738 Chlorion Species 0.000 description 5
- 229910052602 gypsum Inorganic materials 0.000 description 5
- 239000010440 gypsum Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 4
- 230000004913 activation Effects 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 150000004683 dihydrates Chemical class 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 229910021653 sulphate ion Inorganic materials 0.000 description 4
- 229910004261 CaF 2 Inorganic materials 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 239000010436 fluorite Substances 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000001112 coagulating effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004480 active ingredient 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
- 239000011230 binding agent Substances 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 229940125898 compound 5 Drugs 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical class Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
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
- C04B28/14—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
-
- 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
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
- C04B2103/0094—Agents for altering or buffering the pH; Ingredients characterised by their pH
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/26—Corrosion of reinforcement resistance
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a concrete cementing material which contains 5-55% of modified fluorgypsum, 5-55% of fly ash and 35-40% of cement (the mass percentages are based on the total weight of the concrete cementing material). The cementing material does not contain substances which corrode reinforcing steel bars, can be suitable for the processes of concrete and reinforced concrete, the blended proper amount of fly ash can effectively prevent chloride ions from corroding the reinforcing steel bars, the concrete prepared by mixing and stirring the fly ash with sand, crushed stone and water has the advantages of low price, high early strength and quick increase of later strength, the fluorgypsum and the fly ash are comprehensively used, the defect of low early strength caused by only blending the fly ash is overcome by utilizing the mutual excitation effect of the fluorgypsum and the fly ash, the industrial waste residues of a fluoride salt factory and a coal-fired power plant are effectively utilized, the environmental pollution is reduced, the cost is low, the raw materials are easy to obtain, the toxicity and the harm are avoided, and the secondary pollution to the environment is avoided.
Description
Technical field
The present invention relates to concrete gel material, more specifically is that design is the concrete gel material of hardening accelerator with the modification fluorgypsum.
Background technology
Concrete gelling material mainly is a cement.But the manufacture of cement cost is very high, in the production process environment is polluted.Therefore, people study and adopt fusion flyash instead of part cement, to reduce the concrete cost.But this concrete has, and early strength is low, later strength increases fast characteristics.Yet its engineering of disadvantages affect that early strength is low is used.For addressing these problems, people often adopt water reducer to reduce the concrete water amount, and to improve early strength, still high performance water reducer price is very high, adopts chloride salt hardening accelerator can cause steel bar corrosion again.Therefore, need a kind ofly to be used for that manufacturing price is low, early strength is high on the engineering, later strength increases soon and can be to the concrete gelling material of reinforcing bars rusting, during the comprehensive instead of part cement of fluorgypsum after the modification and flyash, just can satisfy this requirement of engineering.
Fluorgypsum and flyash all are industrial residues, and the fluorgypsum amount that saltworks's discharge is fluoridized by annual China reaches more than 100 ten thousand t, and the flyash amount that collect in the fuel-burning power plant then reaches t more than 100,000,000.Depositing of these two kinds of waste residues not only takies a large amount of arable lands, wastes a large amount of construction funds, and improper as if depositing, and also pollutes the environment.Therefore, the development and utilization to these two kinds of waste residues is of practical significance very much.Flyash active less, can not be separately as a kind of gelling material, if but be mixed with composite gelled material with flyash, fluorgypsum and cement, then cement can be used as the alkali-activator of flyash, can be used as the sulphate activation agent of flyash after the fluorgypsum modification, promptly made full use of the chemical property of flyash and fluorgypsum, fluorgypsum not only also has CaSO
4, also contain fluorite CaF
2So, can use simultaneously as adulterant and hardening accelerator, thus can the concrete early strength of bigger raising, reduce the cost of gelling material, and the concrete of mixing flyash can reduce the velocity of diffusion of chlorion, can also reduce corrosion.
Summary of the invention
The object of the present invention is to provide a kind ofly be used for that manufacturing price is low, early strength is high, later strength increases soon and can be to the concrete gelling material of reinforcing bars rusting.
Technical formula is: modification 5～55%, flyash 5～55%, cement 35%～40% (being mass percent, is benchmark with the gross weight of concrete gel material).
Described fluorgypsum starting material derive from the stockyard fluorgypsum of Hunan Xiangxiang Aluminum Plant, and density is 2.91g/cm
3, specific surface area is 656m
2/ kg, water content is 0.02%, pH value is between 6～7; The modification fluorgypsum be through exciting agent modification and grinding fineness be 240 mesh screen residues less than 3%, the optimum mix amount is 15%～25%; Flyash is Xiang Tan, the Hunan I of power plant level flyash, and loss on ignition is 3.5%, and specific surface area is 5400cm
2/ g, the optimum mix amount are 30%～40%.
The preparation method of above-mentioned concrete gel material after all raw material is proportionally weighed up, adds stirrer together and stirs 3～5min simultaneously.
The compound method of gelling material of the present invention be we can say technical, productivity, economic benefit, social benefit are integrated.Fluorgypsum of the present invention derives from Xiangxiang, Hunan fluorine chemistry limited liability company, because just the fluorgypsum aquation of discharging slowly, coagulative power is poor and do not possess early strength etc., so as carrying out modification to it with the sulphate activation agent before gelling material adulterant and the hardening accelerator use, to shorten fluorgypsum time of coagulation and to improve its hardenite intensity, mechanism of modification is: exciting agent generates unsettled double salt (salt mCaSO on fluorgypsum particulate surface
4NH
2O), be decomposed into moisture salt and dihydrate gypsum then again, this just decomposition reaction and the continuous crystallization of dihydrate gypsum that generates just makes slurry form tight interlacing crystalline structure causes setting and harden, produces intensity.Its reaction is described below:
MCaSO
4+ salt nH
2O → salt mCaSO
4NH
2O (double salt)
Salt mCaSO
4NH
2O (double salt) → mCaSO
42H
2O+ salt (n-2m) H
2O
According to hydration and hardening mechanism, the salt exciting agent does not participate in the formation of network structure in whole hydration process, just attached on the fluorgypsum crystal, and the formation by double salt and decompose the aquation that promotes fluorgypsum.Along with the progressively propelling of aquation, the aquation later stage is a crystal growing process, and double salt acts on and weakens, and the salt exciting agent is separated from the fluorgypsum agglutinate, is filled in the space of fluorgypsum agglutinate.Then the fluorine gypsum powder after the modification is ground to fineness and is 240 mesh screen residues less than 3%, this has just strengthened the contact area of fluorgypsum, flyash and exciting agent etc.
The work of flyash is less, can not be separately as a kind of gelling material, if but be mixed with composite gelled material with flyash, fluorgypsum and cement, then cement can be used as the alkali-activator of flyash, can be used as the sulphate activation agent of flyash after the fluorgypsum modification, promptly made full use of the chemical property of flyash and fluorgypsum, fluorgypsum not only contains CaSO
4, also contain fluorite CaF
2So, can use simultaneously as adulterant and hardening accelerator, thus can the concrete early strength of bigger raising, reduce the cost of gelling material, and the concrete of mixing flyash can reduce the velocity of diffusion of chlorion, can also reduce corrosion.
The invention has the advantages that: (1) gelling material of the present invention is mixed with sand, metaling and water and is made concrete after stirring to have price low, the advantage that early strength is high and the later strength growth is fast, but also effectively utilized the industrial residue of fluoridizing saltworks and coal-burning power plant, reduced environmental pollution; (2) the present invention does not contain has the corrosive material to reinforcing bar, can be suitable for concrete and Steel Concrete process, and an amount of flyash of fusion can effectively stop the corrosive nature of chlorion to reinforcing bar; (3) low-cost, starting material be easy to get, nontoxic, to the environment non-secondary pollution.
Description of drawings
Fig. 1 concrete sample structure iron
Embodiment
Make concrete after utilizing gelling material provided by the invention to mix stirring with sand, metaling and water.
Used cement meets the requirement of GB175-1999 " silicate cement, ordinary Portland cement " among the present invention.Common example is 42.5 grades of Portland cements.
Used flyash meets the GB1596-1991 requirement of " being used for cement and concrete flyash " among the present invention, and common example is an I level flyash.
Used sand meets the requirement of GB/T14684-2001 " building sand " among the present invention, and fineness modulus is 2.5～3.0 medium sand.Building stones meet the requirement of GB/T14685-2001 " cobble for building, rubble ", belong to 5～40 continuous grade rubbles.
The modification fluorgypsum that the present invention is used has overcome problems such as the preceding fluorgypsum aquation of modification is slow, coagulative power difference, and fluorgypsum not only contains CaSO
4, also contain fluorite CaF
2So, can use simultaneously, thereby intensity that can bigger raising gelling material, reduce the cost of gelling material, and the concrete of mixing flyash can reduce the velocity of diffusion of chlorion as adulterant and hardening accelerator, can also reduce corrosion.
In the gelling material of the present invention that is used for making big volume blending concrete, the consumption of modification fluorgypsum is 5%～55%, and optimum amount is 15%～25%, and the blended amount of flyash is 5%～55%, the best is 30%～40%, is benchmark with the gross weight of gelling material.After fluorgypsum being mixed in the concrete gel material that mixes by cement, flyash by above-mentioned consumption, can make 3 days intensity of big volume blending concrete improve 109%, fusion can also suppress corrosion effectively, therefore, this gelling material can both can be made the hardening accelerator of excellent property, can effectively suppress chlorine corrosion again.The major cause that early strength is strengthened is: contain a large amount of CaSO in the fluorgypsum
4Composition, and CaSO
4The Ca (OH) that the dihydrate gypsum that aquation produces produces at hydrated cementitious
2Exist down, the active silica-alumina component effect formation ettringite with in the flyash plays sulphate activation to pulverized burned coal ash hydration.This effect is stronger because of the polymolecularity and the surfactivity of newborn dihydrate gypsum.The aquation of flyash has promoted the dissolving and the aquation of dehydrated gyp-again, and promptly the aquation of flyash and dehydrated gyp-is mutually promoted.Thereby can effectively improve the early stage not aquation of flyash and the low problem of gelling system early strength that causes.
In order to understand the present invention better, further illustrate the content of invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
Embodiment 1:
Used experiment starting material are as follows:
Cement: 425 cement that cement cement Manufacturing Co., Ltd in Xiangxiang, Hunan produces;
Flyash: Xiang Tan, the Hunan I of power plant level flyash, loss on ignition is 3.5%, specific surface area is 5400cm
2/ g;
Sand: Xiang River river sand, the medium sand that grating is qualified, fineness modulus are 2.88;
Fluorgypsum: Hunan Xiangxiang Aluminum Plant oven-fresh stockyard fluorgypsum is through the grinding gained, and its main component is an anhydrous calciumsulphate, and radioactive indicator satisfies national standard, and density is 2.91g/cm
3, specific surface area is 656m
2/ kg, water content is 0.02%, pH value is between 6～7.
Stone: cobble, the requirement of compound 5～25mm continuous grading, crush index is 4.2%; Apparent density is 2.63g/cm
3, loose apparent density is 1630kg/m
3, voidage is 30.6%.
Fluorgypsum: 28～35%, flyash 20～25%, cement 40～48%
The gelling material of big volume blending concrete is formulated by cement, flyash and modification fluorgypsum, and each amounts of components is as shown in table 1, is massfraction, and preparation is numbered the gelling material of A1～A12.
The composition proportion of table 1 gelling material
Then, the gelling material that will be numbered A1～A12 according to GBJ80-85 " Standard for test methods of properties of ordinary concrete mixture " is mixed with sand, metaling and water, and the system of mixing is numbered the concrete of B1～B12.Mix proportion is fixed as:
Gelling material: sand: metaling: water=300: 750: 1384: 135
Press GBJ81-85 " normal concrete mechanical test method ", measure and respectively to organize concrete 3 days, 7 days and the ultimate compression strength of 28d, the result is as shown in table 2:
Concrete 3 days ultimate compression strength of table 2
Selection is numbered the concrete of B1, B4-B6, carries out 7 days intensity, and strength trial in 28 days the results are shown in Table shown in 3.
Table 3 concrete seven sky, 28 days ultimate compression strength
Experiment shows: behind the admixture fluorgypsum, can obviously improve concrete early strength (3d intensity), maximum increase rate can reach 109%, and fluorgypsum optimum weight in gelling material is 15%～25%, and late strength of concrete increases also clearly.
Under the situation that flyash and fluorgypsum are mixed altogether, the concrete of being prepared has the early strength height, the premium properties of later strength steady-state growth, early strong high reason mainly is because hydrated cementitious its strength development under the situation of low water binder ratio is very fast, the dissolving and the aquation of while fluorgypsum, in flyash, further quicken under the situation of sial active ingredient, new growth point is provided for the growth of early age strength of concrete, and this growth point awaits further to strengthen, and promptly the flyash early activity excites in cement-flyash-fluorgypsum ternary plural gel system.
Embodiment 2:
The iron wire of 18 φ 2.95mm * 15cm is polished step by step with abrasive paper for metallograph, and after ethanol, acetone cleaned, at iron wire surface-coated one deck Resins, epoxy, the polishing and the other end that cleans iron wire were with as research face.Get 32.5 grades of ordinary Portland cements, after mix at 1: 4 press water cement ratio 1: 2, cement-sand ratio,, mix flyash, then they are stirred, be cast in respectively in the concrete casting injection molding of 2 15cm * 15cm * 15cm according to prescription.18 iron wires are arranged in 3 * 3 matrix to be inserted in the concrete depositing sample and (inserts 9 in each sample), line-spacing is 2.5cm with the row distance, the depth of penetration difference, wherein the first row iron wire is 3cm apart from corrosive fluid immersion face, after this increasing 2cm line by line, is 7cm to the 3rd Xingqi apart from corrosive fluid immersion face.Its sample structure is seen Fig. 1.Use double-layer polyethylene film sealed maintenance 9d behind the 2h.Behind the demoulding with concrete sample with paraffin sealing other five faces except that corrosive fluid is invaded face.
The curing film that corrosive fluid in the concrete sample is immersed face is removed, and immerses in the 1.7mol/L NaCl solution, and immersion face is in same horizontal plane.With the saturated calomel electrode is reference electrode, adopts SDC-III numeral potential difference comprehensive tester to measure the corrosion potential of every iron wire, the continuously measured Ninth Heaven, and be 24h measuring period.
Result of study shows: in the normal concrete iron wire corrosion inhomogeneous, corrosion potential disperses, current potential is negative in time to be moved.Add flyash, the negative amount of moving of iron wire corrosion potential reduces, and extent of corrosion significantly descends.The concrete of mixing flyash can reduce the velocity of diffusion of chlorion, prevents corrosion.The not only alternative a part of cement of flyash reaches the effect of saving material, and can reduce corrosion, prolongs the work-ing life of reinforcing bar in the concrete.
Substitute the gelling material that portion water mud is made with flyash and fluorgypsum, not only manufacturing price is low, early strength is high, later strength increases soon, and can be to reinforcing bars rusting.
Claims (4)
1. concrete gel material, it contains modification fluorgypsum 5～55%, flyash 5～55%, cement 35%～40% (being mass percent, is benchmark with the gross weight of concrete gel material).
2. concrete gel material as claimed in claim 1 is characterized in that its described fluorgypsum starting material derives from the stockyard fluorgypsum of Hunan Xiangxiang Aluminum Plant, and density is 2.91g/cm
3, specific surface area is 656m
2/ kg, water content is 0.02%, pH value is between 6～7.
3. concrete gel material as claimed in claim 1, it is characterized in that its described modification fluorgypsum be through exciting agent modification and grinding fineness be 240 mesh screen residues less than 3%, the optimum mix amount is 15%～25%.
4. concrete gel material as claimed in claim 1 is characterized in that its described flyash is Xiang Tan, the Hunan I of power plant level flyash, and loss on ignition is 3.5%, and specific surface area is 5400cm
2/ g, the optimum mix amount are 30%～40%.
Priority Applications (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103803932A (en) * | 2014-01-21 | 2014-05-21 | 济南大学 | Preparation method of fluorine gypsum decorative partition board |
| CN107382175A (en) * | 2017-07-31 | 2017-11-24 | 蔡小三 | A kind of soil coagulates agent, its preparation method and application admittedly |
| CN112679124A (en) * | 2020-12-30 | 2021-04-20 | 中建材创新科技研究院有限公司 | Natural anhydrite-based cementing material and preparation method thereof |
| CN112960921A (en) * | 2021-01-27 | 2021-06-15 | 广东能源集团科学技术研究院有限公司 | Saline-alkali-resistant cementing material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100076A (en) * | 1994-06-28 | 1995-03-15 | 西北矿冶研究院 | Mine full-water quick-setting cemented filling composite material |
| CN101265068A (en) * | 2008-04-28 | 2008-09-17 | 长沙归一建材科技有限公司 | Gelatinization material gypsum-cement and producing method thereof |
-
2010
- 2010-07-06 CN CN2010102176908A patent/CN101898885A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100076A (en) * | 1994-06-28 | 1995-03-15 | 西北矿冶研究院 | Mine full-water quick-setting cemented filling composite material |
| CN101265068A (en) * | 2008-04-28 | 2008-09-17 | 长沙归一建材科技有限公司 | Gelatinization material gypsum-cement and producing method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 付毅: "氟石膏粉煤灰胶结充填材料试验研究", 《矿冶》, no. 04, 31 December 2000 (2000-12-31), pages 4 - 1 * |
| 杨淼; 郭朝晖; 韦小颖; 肖细元: "氟石膏的改性及其综合利用", 《有机氟工业》, no. 01, 31 March 2010 (2010-03-31), pages 2 - 3 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103803932A (en) * | 2014-01-21 | 2014-05-21 | 济南大学 | Preparation method of fluorine gypsum decorative partition board |
| CN103803932B (en) * | 2014-01-21 | 2015-03-11 | 济南大学 | Preparation method of fluorine gypsum decorative partition board |
| CN107382175A (en) * | 2017-07-31 | 2017-11-24 | 蔡小三 | A kind of soil coagulates agent, its preparation method and application admittedly |
| CN112679124A (en) * | 2020-12-30 | 2021-04-20 | 中建材创新科技研究院有限公司 | Natural anhydrite-based cementing material and preparation method thereof |
| CN112960921A (en) * | 2021-01-27 | 2021-06-15 | 广东能源集团科学技术研究院有限公司 | Saline-alkali-resistant cementing material and preparation method thereof |
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