CN104876459B - A kind of flyash activity exciting agent and large amount high-calcium fly ash cement - Google Patents
A kind of flyash activity exciting agent and large amount high-calcium fly ash cement Download PDFInfo
- Publication number
- CN104876459B CN104876459B CN201510249664.6A CN201510249664A CN104876459B CN 104876459 B CN104876459 B CN 104876459B CN 201510249664 A CN201510249664 A CN 201510249664A CN 104876459 B CN104876459 B CN 104876459B
- Authority
- CN
- China
- Prior art keywords
- flyash
- fly ash
- cement
- large amount
- amount high
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000010881 fly ash Substances 0.000 title claims abstract description 98
- 239000004568 cement Substances 0.000 title claims abstract description 40
- 239000011575 calcium Substances 0.000 title claims abstract description 33
- 229910052791 calcium Inorganic materials 0.000 title claims abstract description 31
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 24
- 230000000694 effects Effects 0.000 title claims abstract description 23
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 27
- 238000000227 grinding Methods 0.000 claims abstract description 25
- 239000011398 Portland cement Substances 0.000 claims abstract description 15
- 239000002956 ash Substances 0.000 claims abstract description 15
- 230000033228 biological regulation Effects 0.000 claims abstract description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 10
- 239000010703 silicon Substances 0.000 claims abstract description 10
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 8
- 150000004683 dihydrates Chemical class 0.000 claims abstract description 8
- 239000010440 gypsum Substances 0.000 claims abstract description 8
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 8
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 8
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 8
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 5
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 5
- 235000011116 calcium hydroxide Nutrition 0.000 claims abstract description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 239000010883 coal ash Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 235000011121 sodium hydroxide Nutrition 0.000 abstract description 8
- 230000005284 excitation Effects 0.000 abstract description 6
- 239000013043 chemical agent Substances 0.000 abstract description 5
- 230000006378 damage Effects 0.000 abstract description 4
- 239000002689 soil Substances 0.000 abstract description 4
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 3
- 231100000331 toxic Toxicity 0.000 abstract description 3
- 230000002588 toxic effect Effects 0.000 abstract description 3
- 239000010813 municipal solid waste Substances 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 12
- 239000002245 particle Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000002742 anti-folding effect Effects 0.000 description 8
- 239000004576 sand Substances 0.000 description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 6
- 239000011401 Portland-fly ash cement Substances 0.000 description 6
- 239000003292 glue Substances 0.000 description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 239000011083 cement mortar Substances 0.000 description 5
- 239000003245 coal Substances 0.000 description 5
- 239000008187 granular material Substances 0.000 description 4
- 239000000378 calcium silicate Substances 0.000 description 3
- 229910052918 calcium silicate Inorganic materials 0.000 description 3
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 3
- 238000005056 compaction Methods 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910018516 Al—O Inorganic materials 0.000 description 2
- 229910018557 Si O Inorganic materials 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000013543 active substance 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
- 239000004566 building material Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 239000002989 correction material Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- -1 hydrogen Sodium oxide Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 210000004127 vitreous body Anatomy 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
A kind of flyash activity exciting agent and large amount high-calcium fly ash cement, the exciting agent is made up of slaked lime, sodium hydroxide and sodium sulfate, and large amount high-calcium fly ash cement includes Portland clinker, dihydrate gypsum, silicon ash, flyash, flyash activity exciting agent；The present invention by physics grinding, the activity of chemical agent complex excitation flyash, obtained doping quantity of fly ash 50% 75% large amount high-calcium fly ash cement, its properties is satisfied by GB175 2007《Common portland cement》Middle regulation requires, is suitable to industrial applications, realizes the extensive recycling of garbage.Flyash can effectively be reduced and store up destruction of the toxic heavy metal to soil in the impact and flyash caused by environment in a large number, be economized the land resource.
Description
Technical field
The present invention relates to a kind of flyash activity exciting agent and large amount high-calcium fly ash cement, are belonged to building materials and are given up with solid
Waste resource utilizes technical field.
Background technology
Flyash is the grain dust that levigate coal dust is collected after burning in boiler in coal-burning power plant.In view of China is " rich
The energy characteristics of coal, oil-poor, few gas " so that coal becomes topmost primary energy.With coal production and coal-burning power plant's number
Amount increases sharply, and flyash yield is also increased sharply.2013, national flyash yield accounted for total industrial solid wastes up to 4.6 hundred million tons
14.8%.Storing up in a large number for flyash not only occupy a large amount of soils, can also environment be caused to have a strong impact on, and such as dust from flying causes
Atmospheric pollution, in flyash, toxic heavy metal is to destruction of soil etc..
Manufacture of cement needs to consume natural mineral resource non-renewable in a large number, such as limestone, clay etc..With cement row
Industry is developed rapidly, and traditional calcareous raw material, siliceous raw material and correction material are limited after all, the sharp increase of cement demand and traditional ore deposit
The in short supply of goods and materials source causes imbalance between supply and demand.At present, add active mixed material during solution is exactly toward cement, mixed by increasing
Close material to reduce clinker content, and cement indices can reach GB175-2007 again《Common portland cement》Middle regulation will
Ask.Flyash, can be with the Ca (OH) after hydrated cementitious used as common active mixed material2Generation pozzolanic reaction, generates C-S-H
Deng gelling material, thus it is widely used in cement industry.Flyash is applied in cement, not only solve store up,
Pollution problem, also can achieve its added value, there is double meaning to environmental protection and resource circulation utilization.
Though flyash can occur pozzolanic reaction, response speed is slower, so as to cause fly ash system early strength
Reduce substantially.GB175-2007《Common portland cement》In middle regulation Portland fly ash cement, the volume of flyash is
40% can be seldom reached in 20%-40%, but actual industrial production, and volume is too high to make the decline of system intensity fairly obvious.
This be due to：On the one hand, in flyash, calcium content is relatively low, it is impossible to fully provide the calcium formed needed for gelled product；Prior
On the one hand it is that, for flyash is with respect to clinker, reactivity is far short of what is expected, response speed in the presence of not having the external world to excite
Very slow.At present mostly cement industry is that but the grindability of the two is different by flyash and grog together grinding, while grinding
When, flyash is limited by mechanical force activating effect, and reactivity is also limited.Though additionally, there is chemi-excitation of the scholar to flyash
Studied, but the apolegamy of exciting agent is not reasonable, exciting agent stimulation effect is not notable.
Content of the invention
It is an object of the invention to overcoming the deficiency of prior art and providing a kind of flyash activity exciting agent.
Further object is that providing the large dosage high calcium fine coal that a kind of doping quantity of fly ash reaches 50%-75%
Ash concrete, the present invention are existed by physics grinding, the activity of chemical agent complex excitation flyash, obtained doping quantity of fly ash
The large amount high-calcium fly ash cement of 50%-75%, its properties are satisfied by GB175-2007《Common portland cement》In
Regulation is required.
A kind of flyash activity exciting agent of the present invention, the exciting agent include following components, constitute by mass percentage：
Slaked lime 30-60%,
Sodium hydroxide 20-40%,
Sodium sulfate 20-40%.
A kind of large amount high-calcium fly ash cement of the present invention, is constituted by mass percentage including following components：
Each component quality percent and be 100%.
A kind of large amount high-calcium fly ash cement of the present invention, weight/mass percentage composition >=10% of CaO in the flyash；Excellent
Elect 10～20% as.
A kind of large amount high-calcium fly ash cement of the present invention, the Portland clinker 28d comprcssive strength >=
52.5MPa.
A kind of large amount high-calcium fly ash cement of the present invention, the Portland clinker are with the granularity of dihydrate gypsum
Cross 80um square hole screens to tail over less than 2%；Its specific surface area >=400m2/ kg, preferably specific surface area are 400-450m2/kg.
The granularity of a kind of large amount high-calcium fly ash cement of the present invention, the silicon ash and fine coal ashes was 80um square holes
Tail over less than 1.5%, its specific surface area >=450m2/ kg, preferably specific surface area are 450-550m2/kg.
A kind of large amount high-calcium fly ash cement of the present invention, the Portland clinker and dihydrate gypsum combined grinding or
Separate grinding is to specific surface area >=400m2/kg.
A kind of large amount high-calcium fly ash cement of the present invention, the silicon ash and flyash grinding combined grinding or separate grinding
To specific surface area >=450m2/kg.
A kind of preparation method of large amount high-calcium fly ash cement of the present invention is briefly described as below：
Each component material is weighed respectively by the cement component proportioning of design, and mix homogeneously obtains high-content fly ash water
Mud, the cement performance index meet GB175-2007《Common portland cement》Regulation.
Advantages of the present invention is briefly described as below：
Through years of researches, inventor has found that the activity of flyash is closely related with granular size, pozzolanic reaction
Process, active closely related with flyash, to a certain extent, granule is thinner, is more susceptible to pozzolanic reaction.Power plant's powder
Coal ash is general all relatively thick, and specific surface area is in 250～350m2/ kg, 80um square hole screen is tailed between 5%～25%.Therefore, originally
Granularity and specific surface area of the invention by restriction flyash, it can be ensured that the activity of flyash is higher, and by mechanical grinding, reaches
Specific surface area to flyash is more than 450m2During/kg, the activity of flyash is further excited.Can be seen that from accompanying drawing 2：Machinery
Grinding dismisses spheroidal particle cohesive body to come, reduce the adhesion between particle swarm, produces more relatively independent spherical
Grain.Spheroidal particle plays ball bearing effect in system, favourable to improving system water requirement；After grinding, bulky grain quantity is obvious
Reduce, occur in that irregular, multi-angular shape granule, particle swarm specific surface area increase, active reaction basic point quantity increases, and is conducive to
Generation pozzolanic reaction；Additionally, increasing for fine grained quantity can also improve material level and match somebody with somebody, fine particle is made to be filled in hardening slurry
In the hole of body, the compaction rate of Behavior of Hardened Cement Paste is improved, in the growth for macroscopically also just showing intensity.
It is the high-calcium fly ass of 10-20% as raw material that the present invention selects CaO content, and using Sal Nitri soluble in water
The exciting agent that ash, sodium hydroxide, sodium sulfate three are composited, the calcium content for supplementing flyash system using slaked lime, is allowed to
The standard of Portland cement 60% calcium content is close to as far as possible, because, the aquation gelled product formed after flyash activating
Amount substantially, therefore, only possesses enough calcium, could be formed more after activation on the impact of fly ash system later strength
Aquation gelled product, can just effectively improve the later strength of fly ash system；NaOH in using exciting agent, directly destruction is in
Acid flyash system, is mainly reflected in OH-Si-O keys, Al-O bond fissions can be made, so as to destroy Si-O tetra- in vitreous body
Face body and Al-O octahedron network structures, increase active matter stripping quantity inside fly ash grain, accelerate Al2O3、SiO2With Ca
(OH)2Reaction, promotes the generation of gelling thing, NaOH, to improving system early strength, there is positive effect；Na in exciting agent2SO4
SO is ionized out in aqueous4 2-, SO4 2-In Ca2+Under effect, with activity Al in vitreous body2O3Reaction generates entringite, is filled in
In water mudrock structure, greatly improve the degree of compaction of system, so as to improve its intensity.Additionally, the compactness of entringite integument
Less than hydrated calcium silicate layer, be conducive to Ca2+Diffuse to inside fly ash grain, continue and internal active substance reaction, enter one
Step promotes the generation of gelling thing.Can be seen that from accompanying drawing 4：After flyash is through mechanical grinding, chemical agent complex excitation, absolutely mostly
Number fly ash grain is involved in reacting, and forms the products such as the cotton-shaped hydrated calcium silicate of many silks, drated calcium aluminate, makes whole system
More tight.The present invention effectively excites fine coal by the exciting agent being combined from slaked lime, sodium hydroxide, sodium sulfate three
The chemism of ash, is conducive to active matter dissolution.
This patent mainly from physics grinding (Control granularity and specific surface area), chemical terms complex excitation flyash activity,
Obtained doping quantity of fly ash 50%～75% large amount high-calcium fly ash cement, when 50% content fly ash, cement gel
The anti-foldings of sand 3d, comprcssive strength respectively 5.4MPa, 28.96MPa, the anti-foldings of 28d, comprcssive strength respectively 10.25MPa,
55.86MPa；During 60% content fly ash, the anti-foldings of cement mortar 3d, comprcssive strength are respectively 4.66MPa, 23.56MPa, and 28d resists
Folding, comprcssive strength are respectively 7.04MPa, 47.66MPa；During 75% content fly ash, the anti-foldings of cement mortar 3d, comprcssive strength point
Not Wei 4.25MPa, 22.45MPa, the anti-foldings of 28d, comprcssive strength be respectively 6.78MPa, 44.35MPa；Its every intensity index is equal
Meet GB175-2007《Common portland cement》Middle regulation is required.
In sum, the present invention is by physics grinding, the activity of chemical agent complex excitation flyash, obtained flyash
Large amount high-calcium fly ash cement of the volume in 50%-75%, its properties are satisfied by GB175-2007《Common Portland water
Mud》Middle regulation requires, is suitable to industrial applications, realizes the extensive recycling of garbage.Flyash can effectively be reduced a large amount of
Destruction of the toxic heavy metal to soil in the impact and flyash caused by environment is stored up, is economized the land resource.
Description of the drawings
Accompanying drawing 1 is schemed for former ash SEM of embodiment of the present invention contrast groups；
Levigate grey SEM figure of the accompanying drawing 2 for embodiment of the present invention experimental group；
Accompanying drawing 3 is 3 net pulp-waterization of embodiment of the present invention contrast groups, 28 days SEM figures；
Accompanying drawing 4 is 6 net pulp-waterization of embodiment of the present invention experimental group, 28 days SEM figures.
Can be seen that from accompanying drawing 1：Fly ash grain group is observed under scanning electron microscope, numerous fine particles are with a bulky grain
Centered on (5～10um), stick to around which, form floc sedimentation one by one..
Can be seen that from accompanying drawing 2：Mechanical grinding makes the dismission of spheroidal particle cohesive body come, and reduces viscous between particle swarm
Attached, produce more relatively independent spheroidal particle.Spheroidal particle plays ball bearing effect in system, needs water to improvement system
Amount is favourable；After grinding, bulky grain quantity is significantly reduced, and occurs in that irregular, multi-angular shape granule, particle swarm specific surface area increase,
Active reaction basic point quantity increases, and is conducive to pozzolanic reaction；Additionally, increasing for fine grained quantity can also improve material
Level is matched somebody with somebody, and fine particle is filled in the hole of hardened paste, improves the compaction rate of Behavior of Hardened Cement Paste, is macroscopically also just showing
The growth of intensity.
Can be seen that from accompanying drawing 3：When flyash is excited without any activation, in net slurry, spheroidal particle is not etched substantially,
Simply be embedded in the product of grog aquation, only part tiny, the higher granule of activity take part in reaction, and fly ash grain
Cementing with the product after grog aquation tight, easily peel off, the cement mortar strength that this is also made with former ash is very poor to match.
Can be seen that from accompanying drawing 4：After flyash is through mechanical grinding, chemical agent complex excitation, most flyash
Grain is involved in reacting, and forms the products such as the cotton-shaped hydrated calcium silicate of many silks, drated calcium aluminate, makes whole system more tight.
Specific embodiment
The present invention provide 3 groups of contrast groups, 6 groups of experimental grouies as embodiment, to further illustrate the present invention.
Experimental group of the present invention and glue sand in contrast groups is made, molding is according to GB/T17671-1999《Cement mortar is strong
The degree method of inspection (ISO methods)》Execute.
After glue sand molding, form removal after standard curing room (20 ± 1 DEG C of room temperature, relative humidity are more than 95%) maintenance 1d is put into,
And with the good each group glue sand test block of marking pen labelling, conserve to regulation age in the water for placing into 20 ± 1 DEG C of temperature.Period, determine
The anti-foldings of glue sand 3d, 28d, compression strength value.
Used by contrast groups is the flyash without grinding；Its specific surface area is 290-330m2More than/kg, 80um square hole screen
12～15%；
What experimental group was selected is the flyash after grinding, and specific surface area is more than 450m2/ kg, control 80um square hole screens are tailed over
It is less than 1.5%；
Contrast groups, experimental group material mixture ratio such as table 1, the wherein quality proportioning of 2 exciting agent of experimental group be Calx 30%, hydrogen
Sodium oxide 40%, sodium sulfate 30%；The proportioning of 4 exciting agent of experimental group be Calx 40%, sodium hydroxide 20%, sodium sulfate
40%, the proportioning of 6 exciting agent of experimental group is Calx 60%, sodium hydroxide 20%, sodium sulfate 20%.
1 unit of table：Gram
| Clinker | Flyash | Dihydrate gypsum | Exciting agent | Silicon ash | |
| Contrast groups 1 | 180 | 225 | 22.5 | - | 22.5 |
| Contrast groups 2 | 135 | 270 | 22.5 | 22.5 | |
| Contrast groups 3 | 67.5 | 337.5 | 22.5 | - | 22.5 |
| Experimental group 1 | 180 | 225 | 22.5 | - | 22.5 |
| Experimental group 2 | 180 | 225 | 22.5 | 6.75 | 15.75 |
| Experimental group 3 | 135 | 270 | 22.5 | - | 22.5 |
| Experimental group 4 | 135 | 270 | 22.5 | 9 | 13.5 |
| Experimental group 5 | 67.5 | 337.5 | 22.5 | - | 22.5 |
| Experimental group 6 | 67.5 | 337.5 | 22.5 | 13.5 | 9 |
Each component mix homogeneously is weighed by the component proportion of table 1, glue sand, molding is made, after conserving to regulation age, is taken out
Glue sand test block, is shown in Table 2 with the anti-folding of cement mortar, the anti-foldings of resistance to compression analyzer test 3d, 28d, comprcssive strength data；
2 unit of table：MPa
As can be seen from Table 2：
Contrast groups 1, contrast groups 2, the comprcssive strength of contrast groups 3 do not reach GB175-2007《Common portland cement》In
42.5 grade strength of Portland fly ash cement of regulation is required.
Experimental group unlike experimental group 1 is unique with contrast groups 3 with contrast groups 2, experimental group 5 from contrast groups 1, experimental group 3
From flyash be after grinding, contrast this two groups of data and 3d, 28d intensity of experimental group 1 can be seen all compared with contrast groups 1
Rise appreciably, every intensity index of wherein experimental group 1 has substantially exceeded GB175-2007《Common portland cement》In
42.5 grade strength of the Portland fly ash cement requirement of regulation, has reached 52.5 grades of intensity requirements of Portland fly ash cement.
Experimental group 2 with the addition of exciting agent on 1 basis of experimental group, reduce silicon ash amount, and intensity has reached GB175-2007《Common Portland
Cement》Specified in Portland fly ash cement 52.5R level intensity requirements.
4 relative experimental group 3 of experimental group, 6 relative experimental group 5 of experimental group reduce silicon ash amount respectively, with the addition of exciting agent,
GB175-2007 is reached《Common portland cement》Specified in 42.5 grade strength of Portland fly ash cement require.
According to GB/T1346-2011《Cement normal consistency water consumption, setting time, the stability method of inspection》, to experiment
The performances such as group 2, experimental group 4, the normal consistency water requirement of the large-doping-amount fly ash cement of experimental group 6, setting time, stability refer to
Mark is detected that data are shown in Table 3：
Table 3
| Normal consistency water requirement | Mortar fluidity | Presetting period | Final setting time | Stability | |
| Experimental group 2 | 25.5% | 263mm | 125min | 255min | Qualified |
| Experimental group 4 | 24.1% | 271mm | 133min | 275min | Qualified |
| Experimental group 6 | 23.2% | 281mm | 148min | 304min | Qualified |
From table 3 it can be seen that experimental group 2, experimental group 4, the setting time of experimental group 6, stability index meet GB175-
2007《Common portland cement》Requirement.
Claims (7)
1. a kind of large amount high-calcium fly ash cement, it is characterised in that：Constituted including following components by mass percentage：
Portland clinker 15-45%,
Dihydrate gypsum 3-5%,
Silicon ash 2-5%,
Flyash 50-75%,
Flyash activity exciting agent 1.5-3%, each component quality percent and be 100%；
The flyash activity exciting agent includes following components, constitutes by mass percentage：
Slaked lime 30-60%,
Sodium hydroxide 20-40%,
Sodium sulfate 20-40%；
The Portland clinker was 80 μm of square hole screens with the granularity of dihydrate gypsum and tailed over less than 2%；Its specific surface area is equal
≥400m2/kg；
The granularity of the silicon ash and fine coal ashes was 80 μm of square hole screens and tailed over less than 1.5%, its specific surface area >=450m2/
kg.
2. a kind of large amount high-calcium fly ash cement according to claim 1, it is characterised in that：CaO in the flyash
Weight/mass percentage composition >=10%.
3. a kind of large amount high-calcium fly ash cement according to claim 1, it is characterised in that：The portland cement is ripe
Material 28d comprcssive strength >=52.5MPa.
4. a kind of large amount high-calcium fly ash cement according to claim 1, it is characterised in that：The portland cement is ripe
Material and dihydrate gypsum combined grinding or separate grinding to specific surface area >=400m2/kg.
5. a kind of large amount high-calcium fly ash cement according to claim 1, it is characterised in that：The silicon ash and flyash
Combined grinding or separate grinding are to specific surface area >=450m2/kg.
6. the preparation method of a kind of large amount high-calcium fly ash cement as described in claim 1-5 any one, its feature exist
In：Each component, mix homogeneously are weighed by the cement component proportioning of design；
The component proportion is by mass percentage：
Portland clinker 15-45%, dihydrate gypsum 3-5%, silicon ash 2-5%, flyash 50-75%, flyash activity exciting agent
1.5-3%.
7. method according to claim 6, it is characterised in that：The large amount high-calcium fly ash cement performance for preparing refers to
Mark meets GB175-2007《Common portland cement》Regulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510249664.6A CN104876459B (en) | 2015-05-15 | 2015-05-15 | A kind of flyash activity exciting agent and large amount high-calcium fly ash cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510249664.6A CN104876459B (en) | 2015-05-15 | 2015-05-15 | A kind of flyash activity exciting agent and large amount high-calcium fly ash cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104876459A CN104876459A (en) | 2015-09-02 |
| CN104876459B true CN104876459B (en) | 2017-03-15 |
Family
ID=53944181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510249664.6A Active CN104876459B (en) | 2015-05-15 | 2015-05-15 | A kind of flyash activity exciting agent and large amount high-calcium fly ash cement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104876459B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3047687A1 (en) * | 2017-02-02 | 2018-08-09 | Saroj Vanijya Private Limited | Engineered concrete binder composition |
| CN106866075A (en) * | 2017-03-01 | 2017-06-20 | 上海理工大学 | A kind of large-doping-amount fly ash cement based composites of superhigh tenacity and preparation method thereof |
| CN108623196A (en) * | 2018-06-15 | 2018-10-09 | 东南大学 | A kind of lime excitation large dosage industrial residue low-carbon cement and preparation method thereof |
| CN108947428A (en) * | 2018-07-13 | 2018-12-07 | 马树立 | A kind of control method of gangue spontaneous combustion |
| CN109796153A (en) * | 2019-04-02 | 2019-05-24 | 山东建筑大学 | A kind of aged cement hydration activity exciting agent |
| CN111892312A (en) * | 2020-08-06 | 2020-11-06 | 张延年 | Method for utilizing multiple solid wastes in large mixing amount |
| CN111995271A (en) * | 2020-08-25 | 2020-11-27 | 湖州市菱湖三狮水泥有限公司 | High-volume fly ash cement and preparation method thereof |
| CN113336459A (en) * | 2020-09-14 | 2021-09-03 | 辰溪县宏兴新材料科技有限公司 | Ultrahigh-toughness high-mixing-amount pulverized coal cement-based composite material and preparation method thereof |
| CN112811877A (en) * | 2021-01-15 | 2021-05-18 | 沈阳建筑大学 | Fly ash activity excitation method and high-calcium fly ash cement with large mixing amount |
| CN112960921B (en) * | 2021-01-27 | 2023-03-17 | 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 |
| CN113277805A (en) * | 2021-05-28 | 2021-08-20 | 贵州盘江煤电集团有限责任公司 | High-strength mixed guniting material based on high-content fly ash and application method thereof |
| CN115504729A (en) * | 2021-06-22 | 2022-12-23 | 国家能源投资集团有限责任公司 | Cementing material composition, cementing material, preparation method and application thereof |
| CN114685069A (en) * | 2022-04-27 | 2022-07-01 | 大唐同舟科技有限公司 | Sulfate-excited fly ash cementing material and preparation method and application thereof |
| CN115043632A (en) * | 2022-07-21 | 2022-09-13 | 福建工程学院 | Sulfate activated fly ash cementing material and preparation method thereof |
| CN115108748A (en) * | 2022-07-21 | 2022-09-27 | 西安天科建大新材料科技有限公司 | High-performance modified fly ash |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120029A (en) * | 1995-01-16 | 1996-04-10 | 辽河石油勘探局钻井一公司 | High-temp.-resistant slag cement for oil well |
| CN101182164A (en) * | 2007-11-16 | 2008-05-21 | 严云 | Clinker-free baking-free fly ash polymer cement |
| CN101549987A (en) * | 2009-03-27 | 2009-10-07 | 长沙理工大学 | Fly ash-desulfuration gypsum composite active mineral admixture for concrete and method and application of the same |
| CN104402270B (en) * | 2014-12-01 | 2016-08-31 | 北京高能时代环境技术股份有限公司 | A kind of high calcium fly-ash cement and preparation method thereof |
-
2015
- 2015-05-15 CN CN201510249664.6A patent/CN104876459B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104876459A (en) | 2015-09-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104876459B (en) | A kind of flyash activity exciting agent and large amount high-calcium fly ash cement | |
| Kabir et al. | Influence of molarity and chemical composition on the development of compressive strength in POFA based geopolymer mortar | |
| CN106007434B (en) | A kind of alkali-activated carbonatite high-titanium slag baking-free ceramicite and preparation method thereof | |
| CN112125633A (en) | C30 grade full-solid waste concrete and preparation method thereof | |
| CN102643070B (en) | Ceramsite heat-preservation building block using non-calcined desulfurized gypsum as main cementing material and preparation method thereof | |
| WO2004058662A1 (en) | A two-component wet cement, process and application thereof | |
| CN105130220B (en) | With discarded concrete and the method for sludge eco-cement and active sand | |
| CN105439485B (en) | Lepidolite slag admixture and preparation method and application | |
| CN101519896B (en) | Vapor-pressing plaster brick and preparation method thereof | |
| CN109485338A (en) | A kind of construction refuse regenerated aggregate pavement brick and preparation method thereof | |
| CN107021694A (en) | A kind of useless clay brick powder of admixture, the regeneration concrete of brick sand | |
| CN101684675B (en) | Autoclaved phosphogypsum brick and method for preparing same | |
| CN106904847B (en) | A method of low fever's complex cement is mutually prepared using discarded concrete Behavior of Hardened Cement Paste | |
| CN111847921B (en) | Low clinker cement and preparation method and application thereof | |
| CN114605121B (en) | Tungsten tailing autoclaved aerated concrete and preparation method thereof | |
| CN103965918A (en) | Curing agent for water quenching manganese slag mollisol | |
| CN102643107B (en) | Calcination-free desulfurized gypsum-based ceramsite concrete perforated brick | |
| CN101412595A (en) | Method for preparing concrete admixture from kaoline tailing | |
| CN113149551B (en) | Superfine sulfur-containing tailing concrete | |
| CN110698122B (en) | Ecological light filler and preparation method thereof | |
| KR20120044014A (en) | Geopolymer composition having high strength and manufacturing method thereof | |
| CN111499236A (en) | Production method for preparing portland cement by using large-amount fly ash and chemical gypsum | |
| CN115872644A (en) | Phosphogypsum hydraulic cementing material and preparation method and application thereof | |
| CN101343156A (en) | Method for improving quality of fly ash concrete blending material | |
| CN111892367A (en) | Energy-saving and environment-friendly cement mortar and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231103 Address after: No. 192, Building 6, R&D Headquarters, Zhongnan University Science Park, Yingzuo Road, Yuelu Street, Yuelu District, Changsha City, Hunan Province, 410006 Patentee after: Hunan Zhongke Resource Technology Development Co.,Ltd. Address before: Yuelu District City, Hunan province 410083 Changsha Lushan Road No. 932 Patentee before: CENTRAL SOUTH University |
|
| TR01 | Transfer of patent right |