CN101172801A - High addition fly ash cement and method for producing the same - Google Patents
High addition fly ash cement and method for producing the same Download PDFInfo
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- CN101172801A CN101172801A CNA2006101142039A CN200610114203A CN101172801A CN 101172801 A CN101172801 A CN 101172801A CN A2006101142039 A CNA2006101142039 A CN A2006101142039A CN 200610114203 A CN200610114203 A CN 200610114203A CN 101172801 A CN101172801 A CN 101172801A
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- gypsum
- high addition
- ash cement
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- 239000004568 cement Substances 0.000 title claims abstract description 86
- 239000010881 fly ash Substances 0.000 title claims description 73
- 238000004519 manufacturing process Methods 0.000 title abstract description 13
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 75
- 239000010440 gypsum Substances 0.000 claims abstract description 75
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 238000000227 grinding Methods 0.000 claims abstract description 6
- 150000004683 dihydrates Chemical class 0.000 claims description 26
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 24
- 239000003638 chemical reducing agent Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 19
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 16
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 16
- 235000011152 sodium sulphate Nutrition 0.000 claims description 16
- 238000000498 ball milling Methods 0.000 claims description 14
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 12
- 229940037003 alum Drugs 0.000 claims description 12
- 239000001110 calcium chloride Substances 0.000 claims description 12
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 12
- 235000017550 sodium carbonate Nutrition 0.000 claims description 12
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 12
- 238000001354 calcination Methods 0.000 claims description 8
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 5
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 4
- 239000011505 plaster Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 3
- 229920001732 Lignosulfonate Polymers 0.000 claims description 2
- -1 alum Chemical compound 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- 238000013467 fragmentation Methods 0.000 claims description 2
- 238000006062 fragmentation reaction Methods 0.000 claims description 2
- 235000019357 lignosulphonate Nutrition 0.000 claims description 2
- 235000013379 molasses Nutrition 0.000 claims description 2
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 claims description 2
- 229920005567 polycyclic polymer Polymers 0.000 claims description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 2
- 235000015320 potassium carbonate Nutrition 0.000 claims description 2
- 235000019353 potassium silicate Nutrition 0.000 claims description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 2
- 239000010883 coal ash Substances 0.000 abstract 5
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 230000001535 kindling effect Effects 0.000 abstract 1
- 239000002956 ash Substances 0.000 description 12
- 239000000446 fuel Substances 0.000 description 12
- 235000011148 calcium chloride Nutrition 0.000 description 11
- 238000007689 inspection Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 9
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 230000015271 coagulation Effects 0.000 description 5
- 238000005345 coagulation Methods 0.000 description 5
- 235000011127 sodium aluminium sulphate Nutrition 0.000 description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- 239000011401 Portland-fly ash cement Substances 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- HIEHAIZHJZLEPQ-UHFFFAOYSA-M sodium;naphthalene-1-sulfonate Chemical compound [Na+].C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 HIEHAIZHJZLEPQ-UHFFFAOYSA-M 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- ILAWINHCZSXLJC-UHFFFAOYSA-N anthracene-1-sulfonic acid;sodium Chemical compound [Na].C1=CC=C2C=C3C(S(=O)(=O)O)=CC=CC3=CC2=C1 ILAWINHCZSXLJC-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- GJPYYNMJTJNYTO-UHFFFAOYSA-J sodium aluminium sulfate Chemical compound [Na+].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GJPYYNMJTJNYTO-UHFFFAOYSA-J 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 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
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 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
- C04B28/02—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
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to high-dosage pulverized coal cement and the production method thereof, and belongs to the technical field of cement. The invention aims to realize high-dosage pulverized coal cement with the coal ash quality of over 40 percent and the simple production art. The invention comprises the steps as follows; the coal ash and the cement clinker are taken as the main material, after respectively grinding, a little gypsum and proper water decreasing agent and kindling agent are added, and mixing ball grinding treatment is performed. All properties meet the national coal ash cement standard requirement. The pulverized coal cement produced by the invention has the advantages of large dosage of coal ash, high early intensity, stable product quality, low production cost and small energy consumption. The invention has great significance for adopting coal ash castoff cosmically and saving the cost of cement.
Description
Technical field
The present invention relates to a kind of cement and preparation method thereof, more particularly, the present invention relates to a kind of pulverized fuel ash cement and preparation method thereof.
Background technology
Flyash is the dust of collecting from coal-fired powder boiler smoke, is one of industry " three wastes ".China is maximum in the world coal production and consumes country, follows the comprehensive utilization of coal, has produced a large amount of flyash.Utilization of fly ash rate such as developed country such as European Union, the U.S. has reached 70～90%, and China's utilization of fly ash rate only is 30～40%.
Cement is the consolidating material of consumption maximum in the engineering construction, and Chinese cement annual production has at present broken through 700,000,000 tons, occupies the No. 1 in the world.But its pollution is increasing, does not meet economic Sustainable development.For a long time, flyash is used widely in China's Cement industry.Nowadays, pulverized fuel ash cement has become one of China's six big cement types.
Pulverized fuel ash cement has generally that hydration heat is low, drying shrinkage is little, later strength is high, bleeding rate is low, helps advantages such as construction during hot season and remote transportation.But doping quantity of fly ash is little, early strength is low, time of coagulation length also be undisputable fact.
It is 20～40% that China's current standards allows the incorporation of flyash, but can only mix usually in the actual production about 20%, and nonetheless the early strength of pulverized fuel ash cement is still very low.
The pulverized fuel ash cement doping quantity of fly ash of introducing in the Chinese patent 88102201.2 is 20～40%, but needs to add the hydrofluoric acid dehydrated gyp-, and this is very big for environmental hazard.The less clinker high early strength flyash cement of introducing among the patent CN 1220978A, doping quantity of fly ash are 30～40%, but need to add water-granulated slag 30～40% simultaneously, and actual is ore slag fly ash cement.The pulverized fuel ash cement of the wet production that Chinese patent 94116979.0 is introduced has adopted semi-hydrated gypsum, has the fast characteristics of condensing, but is prone to the sudden strain of a muscle coagulation phenomena in engineering is used.Introduced a kind of phosphoric acid pulverized fuel ash cement among the patent CN1554611A, but its production process complexity, and using has limitation, only is applicable to quick fix engineering etc.
Also do not have a kind of use flyash amount to surpass 40% and the simple pulverized fuel ash cement of production technique at present, and there is the problem that time of coagulation is long, early strength is low in general pulverized fuel ash cement.
Summary of the invention
The present invention is directed to the problems referred to above, propose a kind of high addition fly ash cement, can bring up to 40%～60% to the consumption of flyash by present 20% level, correspondingly reduce the grog consumption, thereby can reduce cost this cement early strength height, good stability significantly.
Concrete technical scheme is as follows.
The high addition fly ash cement that the present invention proposes mainly is made up of Portland clinker and flyash, and described high addition fly ash cement also comprises mixed gypsum, water reducer and exciting agent, and described mixed gypsum is the mixture of dihydrate gypsum and calcined gypsum.
Preferably, in the total amount of described high addition fly ash cement, described high addition fly ash cement comprises the component of following mass percentage content: flyash 40%～60%, Portland clinker account for 31.5%～58.9%, mixed gypsum 1%～6%, water reducer 0.05%～0.5%, exciting agent 0.05%～2%.
Preferably, described flyash control size 400 mesh screen residues are not more than 10%, and described cement clinker control size 200 mesh screen residues are not more than 10%.
Preferably, in described mixed gypsum, the weight ratio of dihydrate gypsum and calcined gypsum is 0.1～10: 1.More preferably, described calcined gypsum adopts the mixture calcining of one or more kinds in dihydrate gypsum, phosphogypsum and the desulfurated plaster to form, and calcining temperature is controlled at 700～900 ℃, keeps 2～4 hours down at 700～900 ℃.
Preferably, described water reducer is one or more kinds in the sulfonate that is selected from sulfonated lignin, molasses, aromatic series polycyclic polymers, naphthalene water reducer, the carbolineum water reducer.
Preferably, described exciting agent is one or more kinds in yellow soda ash, sodium sulfate, alum, calcium chloride, potassium hydroxide, salt of wormwood, the water glass.
More preferably, described high addition fly ash cement is that all components raw material is mixed, ball milling 1～10 hour, and control size is that 200 mesh screen residues are not more than 10% and obtain.
The preparation method of high addition fly ash cement of the present invention is as follows: all components raw material mixed, and ball milling 1～10 hour, control size is that 200 mesh screen residues are not more than 10%, obtains described high addition fly ash cement.
Wherein, the cement clinker treatment process is: cement clinker is carried out fragmentation, grinding, and control size 200 mesh screen residues are not more than 10%;
The flyash treatment process is: flyash is carried out grinding handle, control size 400 mesh screen residues are not more than 10%;
The mixed gypsum treatment process is: calcined gypsum adopts the mixture calcining of one or more kinds in dihydrate gypsum, phosphogypsum and the desulfurated plaster to form, and calcining temperature is controlled at 700～900 ℃, keeps 2～4 hours down at 700～900 ℃; Calcined gypsum is mixed with dihydrate gypsum, and ball milling obtains mixed gypsum, and control size 200 mesh screen residues are not more than 10%;
The treatment process of water reducer and exciting agent is: water reducer and exciting agent are processed into powder type.
High addition fly ash cement of the present invention is little except the pollution that has general pulverized fuel ash cement and have, low hydration heat, alkali resistant-aggregate reaction, resisting erosion of sulfate, prevent good characteristics such as steel bar corrosion, anti-drying shrinkage, good security, also solved the problem that early strength is low, time of coagulation is long, and later strength is still very high.Because doping quantity of fly ash is big, reduce production costs significantly simultaneously, so significant for utilizing flyash waste, reduction cement production consumption and cost on a large scale.
Embodiment
Following mode with embodiment is further explained the present invention.
Now employed flyash in the embodiments of the invention is listed in the table 1, but flyash used herein is not limited to these flyash, can according to circumstances select.
Table 1 chemical composition of PCA
| The flyash code name | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | Na2O | K2O | TiO2 | Loss on ignition |
| HB-F | 51.31 | 32.10 | 3.35 | 1.64 | 0.84 | 0.36 | 1.12 | 1.11 | 5.02 |
| SD-F | 51.76 | 23.84 | 12.95 | 4.62 | 1.68 | 0.35 | 1.79 | 0.87 | 1.51 |
| HN-F | 37.98 | 24.52 | 2.89 | 4.04 | 1.16 | 0.43 | 0.94 | 0.88 | 25.58 |
Embodiment 1
Adopt HB-F flyash in the table 1, control size 400 mesh screen residues 10%, with dihydrate gypsum: the weight ratio of calcined gypsum=1: 2 mixes dihydrate gypsum and calcined gypsum obtains mixed gypsum, and water reducer adopts wooden sodium sulfonate; (yellow soda ash: the mass ratio of alum=1: 1), above various raw materials are mixed according to mass percentage content listed in the table 2, ball milling is controlled overall granularity 200 mesh screen residues 10% to the mixture of exciting agent employing yellow soda ash and alum.Measure performance according to the GB1344-1999 method of inspection, measurement result is listed in the table 3.Can see that from the result cement of present embodiment reaches 425 label cement the GB1344-1999.
Embodiment 2
Adopt SD-F flyash in the table 1, control size 400 mesh screen residues 10%, with dihydrate gypsum: the weight ratio of calcined gypsum=1: 10 mixes dihydrate gypsum and calcined gypsum obtains mixed gypsum, and water reducer adopts wooden sodium sulfonate; Exciting agent adopts the mixture (calcium chloride: the mass ratio of sodium sulfate=1: 2), above various raw materials are mixed ball milling, control size 200 mesh screen residues 10% according to mass percentage content listed in the table 2 of calcium chloride and sodium sulfate.Measure performance according to the GB1344-1999 method of inspection, measurement result is listed in the table 3.Can see that from the result cement of present embodiment reaches 525 label cement the GB1344-1999.
Embodiment 3
Adopt HN-F flyash in the table 1, control size 400 mesh screen residues 10%, with dihydrate gypsum: the weight ratio of calcined gypsum=10: 1 mixes dihydrate gypsum and calcined gypsum obtains mixed gypsum, and water reducer adopts the polymethine sodium naphthalene sulfonate; Exciting agent adopts the mixture (calcium chloride: the mass ratio of sodium sulfate=1: 3), above various raw materials are mixed ball milling, control size 200 mesh screen residues 10% according to mass percentage content listed in the table 2 of calcium chloride and sodium sulfate.Measure performance according to the GB1344-1999 method of inspection, measurement result is listed in the table 3.Can see that from the result cement of present embodiment reaches 325 label cement the GB1344-1999.
Embodiment 4
Adopt HB-F flyash in the table 1, control size 400 mesh screen residues 10%, with dihydrate gypsum: the weight ratio of calcined gypsum=1: 2 mixes dihydrate gypsum and calcined gypsum obtains mixed gypsum, and water reducer adopts wooden sodium sulfonate; Exciting agent adopts the mixture (yellow soda ash: alum: the mass ratio of sodium sulfate=3: 2: 3) of yellow soda ash, alum and sodium sulfate.Above various raw materials are mixed ball milling, control size 200 mesh screen residues 10% according to mass percentage content listed in the table 2.Measure performance according to the GB1344-1999 method of inspection, measurement result is listed in the table 3.Can see that from the result cement of present embodiment reaches 325 label cement the GB1344-1999.
Embodiment 5
Adopt SD-F flyash in the table 1, control size 400 mesh screen residues 10%, with dihydrate gypsum: the weight ratio of calcined gypsum=1: 10 mixes dihydrate gypsum and calcined gypsum obtains mixed gypsum, water reducer adopts the polymethine sodium naphthalene sulfonate, and exciting agent adopts the mixture (calcium chloride: the mass ratio of sodium sulfate=2: 1) of calcium chloride and sodium sulfate.Above various raw materials are mixed ball milling, control size 200 mesh screen residues 10% according to mass percentage content listed in the table 2.Measure performance according to the GB1344-1999 method of inspection, measurement result is listed in the table 3.Can see that from the result cement of present embodiment reaches 525 label cement the GB1344-1999.
Embodiment 6
Adopt HB-F flyash in the table 1, control size 400 mesh screen residues 10%, with dihydrate gypsum: the weight ratio of calcined gypsum=1: 1 mixes dihydrate gypsum and calcined gypsum obtains mixed gypsum, water reducer adopts the polymethine sodium naphthalene sulfonate, exciting agent adopts the mixture (yellow soda ash: sodium sulfate: the mass ratio of alum=2: 2: 3) of yellow soda ash, sodium sulfate and alum, above various raw materials are mixed ball milling, control size 200 mesh screen residues 10% according to mass percentage content listed in the table 2.Measure performance according to the GB1344-1999 method of inspection, measurement result is listed in the table 3.Can see that from the result cement of present embodiment reaches 325 label cement the GB1344-1999.
Embodiment 7
Adopt HB-F flyash in the table 1, control size 400 mesh screen residues 10%, with dihydrate gypsum: the weight ratio of calcined gypsum=1: 2 mixes dihydrate gypsum and calcined gypsum obtains mixed gypsum, and water reducer adopts polymethine anthracene sulfonic acid sodium; Exciting agent adopts the mixture (yellow soda ash: sodium sulfate: alum: the mass ratio of calcium chloride=3: 2: 3: 1) of yellow soda ash, sodium sulfate, alum and calcium chloride.Above various raw materials are mixed ball milling, control size 200 mesh screen residues 10% according to mass percentage content listed in the table 2.Measure performance according to the GB1344-1999 method of inspection, measurement result is listed in the table 3.Can see that from the result cement of present embodiment reaches 325 label cement the GB1344-1999.
Embodiment 8
Adopt HB-F flyash in the table 1, control size 400 mesh screen residues 10%, with dihydrate gypsum: the weight ratio of calcined gypsum=1: 10 mixes dihydrate gypsum and calcined gypsum obtains mixed gypsum, and water reducer adopts polymethine anthracene sulfonic acid sodium; Exciting agent adopts the mixture (yellow soda ash: sodium sulfate: alum: the mass ratio of calcium chloride=3: 2: 3: 2) of yellow soda ash, sodium sulfate, alum and calcium chloride.Above various raw materials are mixed ball milling, control size 200 mesh screen residues 10% according to mass percentage content listed in the table 2.Measure performance according to the GB1344-1999 method of inspection, measurement result is listed in the table 3.Can see that from the result cement of present embodiment reaches 425 label cement the GB1344-1999.
Table 2
| Sequence number | Flyash % | Cement clinker % | Mixed gypsum % | Water reducer % | Exciting agent % | Corresponding cement mark |
| Embodiment 1 | 40 | 55 | 4 | 0.25 | 0.75 | 425 |
| Embodiment 2 | 40 | 55.5 | 3 | 0.4 | 1.1 | 525 |
| Embodiment 3 | 40 | 54 | 5 | 0.25 | 0.75 | 325 |
| Embodiment 4 | 50 | 45 | 4 | 0.3 | 0.7 | 325 |
| Embodiment 5 | 50 | 44.5 | 4 | 0.4 | 1.1 | 525 |
| Embodiment 6 | 55 | 39 | 5 | 0.25 | 0.75 | 325 |
| Embodiment 7 | 60 | 33.5 | 5 | 0.4 | 1.1 | 325 |
| Embodiment 8 | 60 | 33 | 5.5 | 0.4 | 1.1 | 425 |
According to standard GB 1344-1999 (Portland blast, Portland pozzolana cement and Portland fly ash cement standard) regulation the method for inspection, the doping quantity of fly ash that detection embodiment 1～3 obtains is 40% cement performance, satisfies the Portland fly ash cement standard of label 32.5～42.5 among the GB1344-1999.The specific performance index is: the presetting period is 90min, and final setting time is 160min, and 3 days, 7 days, 28 days folding strength is respectively 5.5MPa, 7.5MPa, 9.9MPa, and 3 days, 7 days, 28 days ultimate compression strength is respectively 19.9MPa, 29.4MPa, 42.5Mpa.
Adopt the method for inspection of GB1344-1999 regulation, detect the cement that doping quantity of fly ash is respectively 50% (embodiment 4 and 5), 55% (embodiment 6), 60% (embodiment 7 and 8), performance is as follows:
Doping quantity of fly ash 50% (embodiment 4 and 5): the presetting period is 56min, and final setting time is 147min, and 3 days, 28 days folding strength is respectively 4.3MPa, 9.0MPa, and 3 days, 28 days ultimate compression strength is respectively 22.2MPa, 52.5Mpa.
Doping quantity of fly ash 55% (embodiment 6): the presetting period is 100min, final setting time is 210min, 3 days, 7 days, 28 days folding strength is respectively 3.0MPa, 6.1MPa, 10.1MPa, 3 days, 7 days, 28 days ultimate compression strength is respectively 11.3MPa, 20.3MPa, 35.6Mpa, three months ultimate compression strength 45Mpa.
Doping quantity of fly ash 60% (embodiment 7 and 8): the presetting period is 58min, final setting time is 90min, 3 days, 7 days, 28 days folding strength is respectively 4.5MPa, 6.6MPa, 8.45MPa, 3 days, 7 days, 28 days ultimate compression strength is respectively 15.1MPa, 31.7MPa, 48.9MPa, three months ultimate compression strength 51.8Mpa.
Can see that from above-mentioned performance measurement result high addition fly ash cement of the present invention can reach the performance that label in the GB1344-1999 Portland fly ash cement standard is 325～525 cement.
Table 3 pulverized fuel ash cement embodiment performance table
As can be seen from Table 3, high addition fly ash cement of the present invention has solved the problem that general pulverized fuel ash cement time of coagulation is long, early strength is low.Just final setting time is adjustable for high addition fly ash cement of the present invention, and relative time is shorter, and early strength and later strength are all higher.High addition fly ash cement preparation method of the present invention utilizes for flyash is extensive and reduces cement production consumption and cost provides an effective way.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (9)
1. high addition fly ash cement, mainly form by Portland clinker and flyash, it is characterized in that: described high addition fly ash cement also comprises mixed gypsum, water reducer and exciting agent, and described mixed gypsum is the mixture of dihydrate gypsum and calcined gypsum.
2. high addition fly ash cement as claimed in claim 1, it is characterized in that: in the total amount of described high addition fly ash cement, described high addition fly ash cement comprises the component of following mass percentage content: flyash 40%～60%, Portland clinker account for 31.5%～58.9%, mixed gypsum 1%～6%, water reducer 0.05%～0.5%, exciting agent 0.05%～2%.
3. high addition fly ash cement as claimed in claim 1 or 2 is characterized in that: described flyash control size 400 mesh screen residues are not more than 10%, and described cement clinker control size 200 mesh screen residues are not more than 10%.
4. high addition fly ash cement as claimed in claim 1 or 2 is characterized in that: in described mixed gypsum, the weight ratio of dihydrate gypsum and calcined gypsum is 0.1～10: 1.
5. high addition fly ash cement as claimed in claim 4, it is characterized in that: described calcined gypsum adopts the mixture calcining of one or more kinds in dihydrate gypsum, phosphogypsum and the desulfurated plaster to form, calcining temperature is controlled at 700～900 ℃, keeps 2～4 hours down at 700～900 ℃.
6. high addition fly ash cement as claimed in claim 1 or 2 is characterized in that: described water reducer is one or more kinds in the sulfonate that is selected from sulfonated lignin, molasses, aromatic series polycyclic polymers, naphthalene water reducer, the carbolineum water reducer.
7. high addition fly ash cement as claimed in claim 1 or 2 is characterized in that: described exciting agent is one or more kinds in yellow soda ash, sodium sulfate, alum, calcium chloride, potassium hydroxide, salt of wormwood, the water glass.
8. high addition fly ash cement as claimed in claim 1 or 2 is characterized in that: all components raw material mixed, and ball milling 1～10 hour, control size is that 200 mesh screen residues are not more than 10%, obtains described high addition fly ash cement.
9. the preparation method of each described high addition fly ash cement in the claim 1～8, it is characterized in that: all components raw material is mixed, ball milling 1～10 hour, control size are that 200 mesh screen residues are not more than 10%, obtain described high addition fly ash cement;
Wherein, the cement clinker treatment process is: cement clinker is carried out fragmentation, grinding, and control size 200 mesh screen residues are not more than 10%;
The flyash treatment process is: flyash is carried out grinding handle, control size 400 mesh screen residues are not more than 10%;
The mixed gypsum treatment process is: calcined gypsum adopts the mixture calcining of one or more kinds in dihydrate gypsum, phosphogypsum and the desulfurated plaster to form, and calcining temperature is controlled at 700～900 ℃, keeps 2～4 hours down at 700～900 ℃; Calcined gypsum is mixed with dihydrate gypsum, and ball milling obtains mixed gypsum, and control size 200 mesh screen residues are not more than 10%;
The treatment process of water reducer and exciting agent is: water reducer and exciting agent are processed into powder type.
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