CN101182164A - Clinker-free baking-free fly ash polymer cement - Google Patents

Clinker-free baking-free fly ash polymer cement Download PDF

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Publication number
CN101182164A
CN101182164A CNA2007100505580A CN200710050558A CN101182164A CN 101182164 A CN101182164 A CN 101182164A CN A2007100505580 A CNA2007100505580 A CN A2007100505580A CN 200710050558 A CN200710050558 A CN 200710050558A CN 101182164 A CN101182164 A CN 101182164A
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China
Prior art keywords
cement
fly ash
flyash
free
admixture
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CNA2007100505580A
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赵海君
严云
胡志华
卢忠远
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
    • C04B2111/1037—Cement free compositions, e.g. hydraulically hardening mixtures based on waste materials, not containing cement as such
    • 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

Abstract

A burn-free fly ash ground polymer cement is characterized in that the cement contains the following components with the weight percentage of 65-86 percent of low-calcium fly ash, 4-20 percent of calcium containing compound, 10-18 percent of alkali excitant and 0-5 percent of admixture. And the calcium containing compound is one or a mixture of more than two of phosphorous slag, kiln dust or lime; the alkali excitant is the composite of NaOH or KOH with rapidly dissolved powdery sodium silicate, liquid silica sol and industrial water glass; the admixture is early strength agent and/or water reducing agent.

Description

Clinker-free baking-free fly ash polymer cement
One, technical field
The present invention relates to the technology of utilizing industrial residue flyash grown place polymerization cement.Be specially a kind of clinker-free baking-free fly ash polymer cement.
Two, background technology
As everyone knows, silicate cement production process energy consumption is big, seriously polluted, resource does not make full use of and the flyash of the annual discharging of China reaches more than 200,000,000 t, its accumulative total stacking amount is about 4,000,000,000 t, take up an area of 4～50,000 hectares, aggravated pollution, caused the huge waste of the energy and resource, and the flyash year utilization ratio of China only has been 30%～40% environment, and wherein sizable part does not have fully to excavate this valuable sial resource value of flyash only as packing material; The notion of ground polymerization cement derives from France professor Davidovits, he finds in the research process to heritage buildings, there is network-like sial oxygen compound to exist in the heritage buildings of weather resistance, this compounds is similar to the structure of matter that some constitute the earth's crust, is called as soil polyalcohol (Geopolymer).Late 1970s, professor Davidovits has developed the novel alkali of a class and has activated gelling material---ground polymerization cement (GeopolymericCement).Ground polymerization cement is a kind of novel green gelling material that integrates early strong, environmental protection, advantage such as durable.Though in recent years people over the ground polymerization cement carried out extensive studies, achievement has been widely used in building, a plurality of industrial sectors such as fire-resistant, anticorrosion, but the material that is activated of research concentrates on kaolin (or metakaolin) and slag mostly, to less relatively with the research of flyash grown place polymerization cement, reason is that kaolin (or metakaolin) and scoriaceous activity are bigger than flyash, the quality of flyash is subjected to coal source and the different influence of combustion conditions in addition, and its mineralogical composition and activity change are quite big; In the article of having delivered, its conclusion incompatibility is also very many; In addition, at present people also do not do more intensive research and inquirement to flyash base polywater mud, and for example: factors such as the mineral composition of flyash (particularly wherein the difference of CaO content and vitreum content), different fineness, the distribution of same fineness different-grain diameter, different activities mode of excitation and different conservation systems are to its Effect on Performance.A kind of " less clinker high early strength flyash cement " patent application is disclosed among the Chinese invention patent application publication number CN1220978A, it is main raw material with flyash and water-granulated slag that this patent application discloses a kind of, directly mix levigate few chamotte powder coal ash cement of making after adding small quantity of clinker and an amount of composite activating agent, this cement be with do or drying after water content less than 1% flyash, with the oven dry after water-granulated slag and broken particle diameter less than the grog of 25mm and by calcium aluminate, compound alkali, water glass, urea, ferrous sulfate etc. are formed, and the composite activating agent that also comprises active silica and compositions such as calcium oxide and combination gypsum mixes and obtains a kind of chamotte powder coal ash cement after levigate.This cement, consume 525 label cement clinker and slags, and use active silica and calcium oxide, composite activating agent moiety complexity, resource is very limited, and flyash output is little simultaneously, its production process is more complicated again, flyash and water-granulated slag need pass through and store, drying and dewatering, so the production time is long, is difficult to promote the use of." a kind of coal ash and cement mixed material " patent application is disclosed again among the Chinese invention patent application publication number CN1173472A, this patent application discloses a kind of with flyash, alkali-activator (calcium hydroxide) and the no coal ash and cement mixed material of admixture (water glass) production, this blended material flyash usage quantity is low, consume 525R cement clinker and calcium hydroxide resource and water glass, cost is higher, therefore is difficult to apply.A kind of " flyash in great mixed amount is produced the method for cement " patent application is disclosed among the Chinese invention patent application publication number CN1468824A, this patent application disclose a kind of produce earlier flyash polymerization material again with crushing and grinding after the grog grinding, consume resources such as gypsum, grog and slag, doping quantity of fly ash is still not high, the production process complexity, the cost height is difficult to apply.
Three, summary of the invention:
The objective of the invention is: the negative impact that production brings at silicate cement and China's flyash are handled and ground polywater mud material present Research, the invention provides a kind of ground polywater mud material and production technique thereof of using relatively large inferior grade flyash to produce, its production process is simple, cost is low, intensity is high, unburned, do not mix Portland clinker, kaolin etc.
In order to realize the foregoing invention purpose, technical solution of the present invention is:
Fly ash polymer cement of the present invention contains low calcium fly ash, calcareous material and alkali-activator and admixture.More than the content of each component thing in cement be respectively (mass percent): low calcium fly ash 65～86%, calcareous material 4～20%, alkali-activator 10～18% (compound back modulus is about 0.8), admixture 0～5%.
So-called low calcium fly ash is defined as flyash according to State Standard of the People's Republic of China GB/T1596-2005 " flyash that is used for cement and concrete ", and promptly by the flyash of hard coal or bituminous coal calcining collection, its calcium oxide content generally is no more than 10%.The flyash more than 90% of China's power plant emission all is low calcium fly ash at present.
Calcareous material can be lime, phosphogypsum, phosphorus slag, kiln ash (CKD), blast-furnace slag, return the one or more kinds of mixtures in scoria, chromium slag and the slag.Generally be phosphorus slag and kiln ash (CKD) etc., or lime.
Alkali-activator can be NaOH, KOH, Na 2CO 3, Na 2SO 4, NaCl, Na 2SiO 3, the one or more kinds of mixtures in silicon sol and the service water glass.It generally is the mixture of NaOH or KOH and instant powdery sodium silicate, liquid-state silicon colloidal sol, service water glass.
Admixture mainly is water reducer and hardening accelerator etc.Can be common water reducer and the hardening accelerator that cement industry is used.
In order to realize the foregoing invention purpose, the specific implementation method of technical solution of the present invention can be:
Low calcium fly ash with 65～86% is with the solid-state alkali-activator of 4～20% calcareous material and 10～18% and 0～5% admixture grinding, and obtaining the powder specific surface area at last is 400～1000m 2/ kg can use by test package; Or with 65～86% low calcium fly ash with 4～20% calcareous material and 0～5% admixture grinding, to the powder specific surface area be 400～1000m 2/ kg packs use with 10～18% liquid alkali-activator again.
The principle that raw material used herein adopts machinery and chemi-excitation to lay equal stress on.Adopt the method for mechanical grinding to destroy the firm protective membrane in fly vitreous surface, make inner solubility SiO 2, Al 2O 3Stripping, scission of link increases, and specific surface area increases, and the reaction contact surface increases, and activated molecule increase, and improve the activity of flyash; Simultaneously, free calcium oxide (fCaO) content is higher in the calcic industrial residue, makes full use of the Ca (OH) after the fCaO aquation 2, with the active SiO in the flyash 2And Al 2O 3Effect excites flyash activity; When not consuming or consuming the lime resource less, increase fly ash calcium content, make waste residue obtain development and use, turn waste into wealth, kill two birds with one stone.Alkali-activator makes in the flyash sal vitreum in alkaline medium, OH -Ion has been broken the network of Al-O, Si-O key, and the polymerization degree is reduced becomes active condition, and with Ca (OH) 2Reaction generates drated calcium aluminate and the hydrated calcium silicate with gelling, thereby produces intensity.
The present invention is with the flyash kind, the fineness of flyash, CaO content, R in the exciting agent 2Content (the R of O 2O is Na 2O or K 2O), w (SiO in the exciting agent 2)/w (Na 2O) ratio and conservation system 6 factors and the interaction between them thereof are factor, and each factor adopts four different levels, with intensity be to investigate index, design orthogonal experiment scheme.The analysis experimental result obtains the optimum proportion ratio and is: doping quantity of fly ash 65～86%, calcium mineral 4～20% and alkali-activator 10～18%.Wherein, produce fly ash polymer cement, flyash is as main raw material(s), and its volume is not less than 65%, utilizes this valuable sial resource better big volume; Yet its volume surpasses at 86% o'clock, and the fly ash polymer cement intensity of preparation reduces.Equally, the volume of raw material calcium mineral 4～20% is decided according to prepared fine coal lacquer putty polywater mud intensity; For alkali-activator, volume is lower than 10%, and prepared cement label more than needed reduces; Volume surpasses 18%, and production cost increases, and is unfavorable for actual production in enormous quantities application.
Four, embodiment
Be the enforcement example that do not limit of the present invention below.Implement low calcium fly ash that example adopted and be the F class of river oil heat power plant discharging and do the low calcium fly ash of row, calcareous material is the 1#-phosphorus slag, 2#-kiln ash (CKD), and 3#-lime, it is domestic all to take from Sichuan.
1, material chemical component (seeing Table 1)
2, batching (seeing Table 2)
Table 1 material chemical component
Kind Flyash Phosphorus slag CKD Lime
SiO 2 Quality % 54.50 38.21 14.20
Al 2O 3 32.01 6.59 5.63
Fe 2O 3 5.61 2.99 2.22
CaO 1.27 45.06 45.29 ≥85
MgO 1.46 1.86 2.35
SO 3 0.58 - -
K 2O 2.47 0.54 4.15
Na 2O 0.31 0.22 0.80
P 2O 5 0.19 - -
Loss on ignition 1.56 - -
Table 2 furnish component
Experiment numbers Prescription (quality %) Admixture quality % Folding strength 〉=/MPa Ultimate compression strength 〉=/MPa
Flyash Calcareous material Alkali-activator
Phosphorus slag CKD Lime Na OH+water glass KO H+ water glass NaO H+ silicon sol KOH+silicon sol The instant powdery sodium silicate of NaO H+ KOH+instant powdery sodium silicate Water reducer Hardening accelerator 3d 28d 3d 28d
1 71.4 12.6 16 16 0-5 0-5 3.8 7.8 18.8 48.1
16 0-5 0-5 4.1 7.6 19.3 46.3
69.4 18 0-5 0-5 3.9 7.5 18.1 46
18 0-5 0-5 4.1 7.7 19 45.8
77.4 10 0-5 0-5 4.2 7.8 19.5 49
10 0-5 0-5 4.3 7.7 19.9 48.4
2 67.2 16.8 16 0-5 0-5 5.7 6.6 22.7 33.6
16 0-5 0-5 5.9 6.4 24 33.1
2 65.2 16.8 18 0-5 0-5 5.7 6.4 22.1 34.2
18 0-5 0-5 5.8 6.3 24 33
73.2 10 0-5 0-5 5.7 6.2 22.4 34.6
10 0-5 0-5 5.9 6.2 24 34
3 80 4 16 0-5 0-5 3.1 7.5 14.1 40.8
16 0-5 0-5 3.3 7.4 16 38.9
78 18 0-5 0-5 3.1 7.3 15 38.4
18 0-5 0-5 3.3 7.1 16.7 37.6
86 10 0-5 0-5 3.3 7.6 16.3 38
10 0-5 0-5 3.5 7.2 17.1 37.6
4 80 4 16 0-5 0-5 2.3 5.9 11.8 32.2
16 0-5 0-5 3 5.7 14 32
78 18 0-5 0-5 2.5 5.8 12.1 33
78 4 18 0-5 0-5 3.1 5.7 13.2 32
86 10 0-5 0-5 3.6 5.8 16 33.5
10 0-5 0-5 3.8 5.6 16.4 33
5 65 20 15 0-5 0-5 5.5 7.0 23.4 35.1
15 0-5 0-5 5.8 6.9 24.8 34.8
62 18 0-5 0-5 5.3 6.8 23.1 34.6
18 0-5 0-5 5.8 7.0 24.5 34.1
70 20 10 0-5 0-5 5.8 7.2 24.6 35.1
10 0-5 0-5 6.0 7.0 25.1 35
6 32.5R silicate cement 5.4 7.5 21.9 32
Annotate: each age strength is the full water intensity of normal temperature maintenance in the table 2; If with the test block low-temperature steam maintenance operating, its strength grade is all above the 42.5R silicate cement, in addition have up to MPa more than 130.When using admixture in the prescription, each age strength all is higher than 32.5R silicate cement label.Admixture can determine addition content according to practical situation.Be repeated experiments individually in the table, owing to reasons such as envrionment conditionss, its result changes to some extent.
Analyze as can be known by embodiment of the invention table 2 column data:
One, when the phosphorus slag volume be 4% and 12.6%, exciting agent content is 16%, 18% and 10% o'clock, along with the increase of doping quantity of fly ash, made strength of cement label reduces, when not mixing admixture, early strength is lower; Later strength all is higher than the 32.5R silicate cement, and the phosphorus slag volume is that 4% later strength index reaches the 42.5R silicate cement.
Two, when lime intermingled quantity be 16.8% and 20%, exciting agent content is 16%, 18% and 10% o'clock, made strength of cement index is higher than the 32.5R silicate cement.When adding admixture, intensity obviously improves.
Three, when the CKD volume be 4%, exciting agent content is 16%, 18% and 10% o'clock, made cement intensity index in early stage is lower, later stage ultimate compression strength is higher than the 32.5R silicate cement.After using admixture, each age strength significantly improves, and all is higher than the 32.5R silicate cement.
Four, above prescription, intensity index all is higher than the 42.5R silicate cement under the vapor cure condition.
According to above analysis, can obtain to draw a conclusion:
Do not using under Portland clinker and the kaolinic situation, only adopt flyash to cooperate with the calcic industrial residue, total amount reaches 82-90%, be aided with alkali-activator, admixture admixture or low-temperature steam maintenance operating in case of necessity, high-performance fly ash polymer cement and goods thereof that can preparation cost is low, intensity is high, unburned.According to the quality and the consumption of flyash, can produce the fly ash polymer cement of different labels.Utilize this cement, can prepare high performance cement products by certain means and technology, can substitute 32.5R or the corresponding cement products of 42.5R silicate cement fully, the economy and society benefit is very considerable.

Claims (1)

1. clinker-free baking-free fly ash polymer cement, it is characterized in that containing by mass percentage in this cement: low calcium fly ash 65～86%, calcareous material 4～20%, alkali-activator 10～18%, admixture 0～5%, wherein, calcareous material is the one or more kinds of mixtures in phosphorus slag, kiln ash or the lime, alkali-activator is the mixture of NaOH or KOH and instant powdery sodium silicate, liquid-state silicon colloidal sol, service water glass, and admixture is hardening accelerator and/or water reducer.
CNA2007100505580A 2007-11-16 2007-11-16 Clinker-free baking-free fly ash polymer cement Pending CN101182164A (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101830653A (en) * 2010-04-23 2010-09-15 同济大学 Sludge-high calcium fly ash alkali-excited cement and preparation method thereof
RU2458876C2 (en) * 2010-11-12 2012-08-20 Государственное образовательное учреждение высшего профессионального образования "Братский государственный университет" Binder
CN103043975A (en) * 2012-12-20 2013-04-17 郑州工大建材有限公司 Mine whole-tailing alkali binding material bond filling material
CN104876459A (en) * 2015-05-15 2015-09-02 中南大学 Coal ash activated excitant and high-content high-calcium fly-ash cement
CN105130373A (en) * 2015-09-30 2015-12-09 四川大学 Preparation method of fly ash based polymer concrete
WO2016082060A1 (en) * 2014-11-28 2016-06-02 苏笮斌 Tk-jh mineral interface active material, and preparation method and use method therefor
CN106477930A (en) * 2016-10-12 2017-03-08 贵州师范大学 A kind of chemical admixture for exciting old long-pending flyash activity and its application
CN108249789A (en) * 2018-01-15 2018-07-06 三峡大学 A kind of phosphorus slag base compound cementitious matter of no first-hand datum and preparation method thereof
CN108529913A (en) * 2018-04-12 2018-09-14 范建国 A kind of fine coal lacquer putty polymer material and the preparation method and application thereof
CN110218037A (en) * 2019-07-08 2019-09-10 山东创能机械科技有限公司 A kind of wet ash discharge base filler and its preparation method and application
CN111646720A (en) * 2020-06-29 2020-09-11 常熟理工学院 Dry process for preparing non-sintered cement and its product
CN111995354A (en) * 2020-08-31 2020-11-27 武汉大学 Reinforced fly ash-based polymer and preparation method thereof
CN115537051A (en) * 2022-11-07 2022-12-30 哈尔滨工业大学（威海） Inorganic polymer coating and preparation method and application thereof
CN116217191A (en) * 2023-03-22 2023-06-06 西京学院 Cold region desert sand composite alkali-activated anti-freezing mortar and preparation and construction methods thereof

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101830653A (en) * 2010-04-23 2010-09-15 同济大学 Sludge-high calcium fly ash alkali-excited cement and preparation method thereof
CN101830653B (en) * 2010-04-23 2012-08-22 同济大学 Sludge-high calcium fly ash alkali-excited cement and preparation method thereof
RU2458876C2 (en) * 2010-11-12 2012-08-20 Государственное образовательное учреждение высшего профессионального образования "Братский государственный университет" Binder
CN103043975A (en) * 2012-12-20 2013-04-17 郑州工大建材有限公司 Mine whole-tailing alkali binding material bond filling material
CN103043975B (en) * 2012-12-20 2015-01-07 郑州工大建材有限公司 Mine whole-tailing alkali binding material bond filling material
WO2016082060A1 (en) * 2014-11-28 2016-06-02 苏笮斌 Tk-jh mineral interface active material, and preparation method and use method therefor
CN104876459A (en) * 2015-05-15 2015-09-02 中南大学 Coal ash activated excitant and high-content high-calcium fly-ash cement
CN105130373A (en) * 2015-09-30 2015-12-09 四川大学 Preparation method of fly ash based polymer concrete
CN106477930A (en) * 2016-10-12 2017-03-08 贵州师范大学 A kind of chemical admixture for exciting old long-pending flyash activity and its application
CN108249789A (en) * 2018-01-15 2018-07-06 三峡大学 A kind of phosphorus slag base compound cementitious matter of no first-hand datum and preparation method thereof
CN108529913A (en) * 2018-04-12 2018-09-14 范建国 A kind of fine coal lacquer putty polymer material and the preparation method and application thereof
CN110218037A (en) * 2019-07-08 2019-09-10 山东创能机械科技有限公司 A kind of wet ash discharge base filler and its preparation method and application
CN110218037B (en) * 2019-07-08 2021-10-08 山东创能机械科技有限公司 Wet ash-discharging base filling material and preparation method and application thereof
CN111646720A (en) * 2020-06-29 2020-09-11 常熟理工学院 Dry process for preparing non-sintered cement and its product
CN111995354A (en) * 2020-08-31 2020-11-27 武汉大学 Reinforced fly ash-based polymer and preparation method thereof
CN111995354B (en) * 2020-08-31 2021-10-22 武汉大学 Reinforced fly ash-based polymer and preparation method thereof
CN115537051A (en) * 2022-11-07 2022-12-30 哈尔滨工业大学（威海） Inorganic polymer coating and preparation method and application thereof
CN116217191A (en) * 2023-03-22 2023-06-06 西京学院 Cold region desert sand composite alkali-activated anti-freezing mortar and preparation and construction methods thereof

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