1. Sebopeho le Hydration Chemistry ea Calcium Aluminate Cement
1.1 Methati e ka Sehloohong le Mehloli ea Lintho tse tala
(Calcium Aluminate Concrete)
Calcium aluminate concrete (CAC) ke sehlahisoa sa moaho se ikhethileng se ipapisitseng le samente ea calcium aluminate (CAC), e fapaneng haholo le samente e tloaelehileng ea Rose city (OPC) ka bobeli tlhamo le tshebetso.
Mokhahlelo o ka sehloohong o tlamang ho CAC ke monocalcium aluminate (CaO · Al ₂ O Four kapa CA), hangata ke 40– 60% ea clinker, hammoho le mekhahlelo e meng e fapaneng joalo ka dodecacalcium hepta-aluminate (C ₁₂ A ₇), calcium dialuminate (CA ₂), le palo e nyane ea tetracalcium trialuminate sulfate (C NANE JOALOKA).
Mekhahlelo ena e hlahisoa ka ho kopanya bauxite ea bohloeki bo phahameng (ore e nang le aluminium e ngata) le lejoe la mokoetla ka har'a arc ea motlakase kapa libotlolong tsa rotary maemong a mocheso lipakeng tsa 1300 ° C le 1600 °C, ho lebisa ho klinka eo ka mora moo e siloang hantle hore e be phofo e ntle.
Tšebeliso ea bauxite e tiisa oxide e phahameng ea aluminium (Ka bobeli O PEDI) dikahare– hangata lipakeng tsa 35% le 80%– e hlokahalang bakeng sa meaho e hanyetsanang le lik'hemik'hale tsa sehlahisoa.
Ho fapana le OPC, e itšetlehileng ka calcium silicate hydrates (C-S-H) bakeng sa kholo ea matla, CAC e fumana matlo a eona a maiketsetso ka mekhahlelo ea hydration ea calcium aluminate, ho theha sehlopha se ikhethileng sa li-hydrate tse nang le ts'ebetso e phahameng ea maemo a holimo libakeng tse tletseng bora.
1.2 Hydration Mechanism le Toughness Advancement
The hydration ea calcium aluminate concrete ke setsi, mokhoa o thibelang mocheso o lebisang ho nts'etsopele ea li-hydrate tsa metastable le tse tsitsitseng ka nako.
Maemong a mocheso a thathamisitsoeng ka tlase 20 °C, CA e moisturize ho hlahisa CAH ₁₀ (calcium aluminate decahydrate) le C PEDI AH ₈ (dicalcium aluminate octahydrate), e leng mekhahlelo e metastable e fanang ka boima ba pele bo potlakileng– hangata ho fihlella 50 MPa ka hare 1 letsatsi.
Leha ho le joalo, ka mocheso o fetang 25– 30 °C, li-hydrates tsena tse nang le metastable li etsa phetoho ho ea sethaleng se sireletsehileng sa thermodynamically, C ₃ AH ₆ (hydrogarnet), le amorphous light weight aluminium hydroxide (AH TŠELELA), mokgoa oo ho thoeng ke tshokoloho.
Phetoho ena e theola bongata bo tiileng ba mekhahlelo e nang le mongobo, ho phahamisa porosity le monyetla oa ho senya konkreite e hlokometsoeng ka nepo nakong eohle ea pheko le ts'ebeletso.
Theko le boholo ba phetoho li susumetsoa ke karolo ea metsi ho samente, mocheso oa ho folisa, le ponahalo ea lisebelisoa tse kang silica fume kapa microsilica, e ka fokotsang tahlehelo ea matla ka ho hloekisa moralo oa pore le ho khothalletsa likarabo tsa bobeli.
Ho sa tsotellehe kotsi ea ho sokoloha, phaello e potlakileng ea matla le bokhoni ba ho theola pele ho etsa hore CAC e lokele likarolo tsa precast le mosebetsi oa ho lokisa maemo a tšohanyetso lits'ebetsong tsa indasteri..
( Calcium Aluminate Concrete)
2. Litšobotsi tsa 'Mele le Mechini Tlas'a Maemo a Feteletseng
2.1 Tshebetso e Phahameng ea Mocheso le Refractoriness
E 'ngoe ea likarolo tse hlalosang ka ho fetisisa tsa konkreite ea calcium aluminate ke bokhoni ba eona ba ho ema ho fihlela mocheso o feteletseng, ho e etsa khetho e khothaletsoang bakeng sa lithapo tsa cellular tse refractory ho lihitara tsa khoebo, kilns, le licheso.
Ha ho futhumala, CAC e na le pokello ea likarabo tsa dehydration le sintering: hydrates bola pakeng tsa 100 ° C le 300 °C, e lateloa ke ho thehoa ha mekhahlelo e bohareng ea kristale e kang CA ₂ le melilite (gehlenite) fedile 1000 °C.
Boemong ba mocheso bo feta 1300 °C, mefuta e metenya ea ceramic ea mofuta oa mokelikeli oa mokelikeli, ho baka ho toughness ho hoholo ho fola le tshireletseho ya bongata.
Litloaelo tsena li fapana haholo le konkreite e thehiloeng ho OPC, eo ka kakaretso e hlabang kapa e qhekellang 300 ° C ka lebaka la khatello ea maikutlo ea mouoane le ho senyeha ha mekhahlelo ea C-S-H.
Li-concrete tse thehiloeng ho CAC li ka boloka mocheso o sa khaotseng oa mocheso hoo e ka bang 1400 °C, ho itshetlehile ka mofuta o akaretsang le tharollo, 'me hangata li sebelisoa hammoho le ho bokellana ha refractory joalo ka bauxite e calcined, chamotte, kapa mullite ho ntlafatsa ho hanyetsa mocheso oa mocheso.
2.2 Ho hanyetsa ho Otloa ha Lik'hemik'hale le Mafome
Calcium aluminate konkreite e bonts'a khanyetso e ikhethang ho mefuta e mengata e fapaneng ea lik'hemik'hale, mathata a nang le asiti le sulfate haholo moo OPC e neng e tla theola kapele.
Mekhahlelo ea aluminate e nang le mongobo e tsitsitse haholoanyane maemong a tlase a pH, e nolofalletsang CAC ho mamella ho otloa ha asiti ho tsoa mehloling e kang sulfuric, hydrochloric, le li-organic acid– e tlwaelehileng dimeleng tsa pheko ya metsi a litšila, lisebelisoa tsa ho sebetsana le lik'hemik'hale, le mesebetsi ea merafo.
Ho feta moo, e na le tšireletso e matla ho tlhaselo ea sulfate, sesosa se seholo sa tšenyo ea konkreite ea OPC mobung le tikolohong ea metsing, ka lebaka la khaello ea calcium hydroxide (Portlanders) le mekhahlelo ea ho etsa ettringite.
Ho feta moo, CAC e bonts'a ho qhibiliha ho tlase metsing a leoatle le ho hanyetsa ho kenella ha ion ea chloride, ho fokotsa kotsi ya mafome a tshehetso dibakeng tse tletseng bora tsa lewatle.
Lintho tsena tsa bolulo kapa tsa khoebo li etsa hore e be se loketseng bakeng sa linings tsa biogas digester, litanka tsa 'maraka oa pampiri le pampiri, le litsamaiso tsa flue gas desulfurization moo likhatello tsa lik'hemik'hale le tsa mocheso li leng teng.
3. Litšobotsi tsa Microstructure le Durability
3.1 Pore Sebopeho le Permeability
Ho tiea ha konkreite ea aluminiate ea calcium ho amana haholo le sebopeho sa eona sa microstructure, haholo-holo pore dimension kabo le kgokelo.
CAC e nonneng e ncha e bonts'a moralo o motle oa pore ha o bapisoa le OPC, e nang le li-gel pores le li-capillary pores tse eketsang ho lutla ho tlase sebopehong le ho matlafatsa khanyetso ho ingress e matla ea ion..
Leha ho le joalo, joalo ka tsoelopele ea phetoho, ho hoama ha sebopeho sa pore ka lebaka la densification ea C THREE AH ₆ e ka ntlafatsa ho kenella ha konkreite e sa phekoloe kapa e sirelelitsoe..
Keketso ea lihlahisoa tse sebetsang tsa aluminosilicate, joalo ka molora oa fofa kapa metakaolin, e ka ntlafatsa bophelo bo bolelele ba nako e telele ka ho ja lime e sa lefelloeng ka ho feletseng le ho hlahisa calcium aluminosilicate hydrate e eketsehileng (C-A-S-H) mekhahlelo e ntlafatsang microstructure.
Pholiso e nepahetseng– pheko e mongobo haholo mochesong o laolehileng– ho bohlokoa ho chechisa phetoho le ho lumella kholo ea botenya, matrix e sa keneng.
3.2 Thermal Shock le Spalling Resistance
Thermal shock resistance ke ts'ebetso ea bohlokoa ea metric bakeng sa lihlahisoa tse sebelisoang ho futhumatsa ntlo ea cyclic le moea o pholileng.
Calcium aluminate concrete, haholo-holo ha e hlahisoa ka samente e tlaase le molumo o phahameng oa ho bokella, e bonts'a khanyetso e ikhethang ea spalling ea mocheso ka lebaka la ho fokotseha ha eona ka ho atolosoa ha mocheso le mocheso o phahameng oa mocheso o amanang le konkreite tse ling tsa refractory..
Ho ba teng ha li-microcracks le porosity e hokahaneng ho lumella ho phomola ho tšoenyeha nakong eohle ea liphetoho tse potlakileng tsa mocheso, ho tshireletsa kgahlanong le phahlo e bohloko.
Tšehetso ea fiber– ho sebedisa tshepe, polypropylene, kapa likhoele tsa basalt– ho feta ho matlafatsa ho tiea le ho hanyetsa ho arohana, ka ho khetheha ho pholletsa le sethaleng sa pele sa mocheso oa linings tsa khoebo.
Likarolo tsena li netefatsa bophelo bo bolelele ba ts'ebeletso lits'ebetsong tse joalo ka lithapo tsa cellular tsa ladle ha ho etsoa tšepe, libono tse bilikang tlhahisong ea konkreite, le li-crackers tsa petrochemical.
4. Likopo tsa Liindasteri le Mekhoa ea Tsoelo-pele ea Kamoso
4.1 Limmaraka tsa Bohlokoa le Lisebelisoa tsa Meaho
Calcium aluminate konkreite e bohlokoa liindastering moo konkreite e tloaelehileng e emisang ho sebetsa ka lebaka la ho pepesehela mocheso kapa lik'hemik'hale..
Makaleng a tšepe le a motheo, e sebelisoa bakeng sa linings monolithic ka ladles, lihlopheng, le likoting tse tletseng metsi, moo e emang bakeng sa mohala oa tšepe o mokelikeli le ho palama baesekele.
Limeleng tsa ho chesoa ha litšila, CAC-based refractory castables e sireletsang mabota a lebota ho tsoa ho likhase tse acidic flue le molora o sa thabiseng oa fofa maemong a phahameng a mocheso..
Moralo oa metsi a litšila oa sechaba o sebelisa CAC bakeng sa likoti, liteishene tsa pompo, le lipeipi tsa likhoerekhoere tse pepesehileng ho asiti ea sulfuric ea biogenic, nako ea bophelo e ntseng e eketseha haholo ha e bapisoa le OPC.
E boetse e sebelisoa lits'ebetsong tsa lits'ebeletso tsa tokiso e potlakileng bakeng sa litsela tsa mahala, marokho, le litselana tsa lifofane, moo sebopeho sa eona se potlakileng se lumellang ho qala ka letsatsi le ts'oanang ho sephethephethe sa marang-rang.
4.2 Moshoelella le Mekhoa e Tsoetseng Pele
Ho sa tsotelehe melemo ea ts'ebetso ea eona, tlhahiso ea samente ea calcium aluminate e nka matla 'me e na le sebaka se seholo sa khabone ho feta OPC ka lebaka la mocheso o phahameng oa mocheso..
Boithuto bo tsoelang pele bo tsepamisitse maikutlo ho fokotseng phello ea tikoloho ka ho nkela sebaka se seng ka li-spino-offs tsa indasteri, joalo ka manya a aluminium kapa slag, le ho ntlafatsa katleho ea sebōpi.
Mefuta e mecha e kopanyang li-nanomaterials, joalo ka nano-alumina kapa carbon nanotubes, sepheo sa ho matlafatsa matla a pele, tshenyeho e tlase e amanang le tshokoloho, le ho atolosa lithibelo tsa mocheso oa tharollo.
Ho phaella moo, ho hola hoa samente e tlase le samente e tlase haholo (ULCCs) ntlafatsa density, matla, le ho tšoarella ka ho fokotsa bongata ba matrix a arabelang ha o ntse o sebelisa li-interlock tse bokelletsoeng..
Joalo ka ha mekhoa ea khoebo e hloka lihlahisoa tse ling tse hanyetsanang le ho feta, konkreite ea aluminate ea calcium e ntse e tsoela pele joalo ka lejoe la sekhutlo la ts'ebetso e phahameng, kaho e tsitsitseng le kaho dibakeng tse thata ka ho fetisisa.
Ka kakaretso, konkreite ea aluminate ea calcium e kopanya tsoelo-pele e potlakileng ea matla, tshireletseho ya mocheso o phahameng, le khanyetso e ikhethang ea lik'hemik'hale, ho etsa hore e be thepa ea bohlokoa bakeng sa meaho e nang le mathata a feteletseng a mocheso le matla.
Khemistri ea eona e ikhethang ea hydration le nts'etsopele ea microstructural e hloka ho ts'oaroa ka hloko le setaele, leha ho le joalo ha e sebelisoa ka katleho, e fana ka boima bo ke keng ba lekanngoa le polokeho le ts'ireletso lits'ebetsong tsa khoebo ho pota lefatše.
5. Mofani
Cabr-Concrete ke mofani oa thepa tlas'a TRUNNANO ea Calcium Aluminate Cement e nang le over 12 lilemo tsa boiphihlelo ba ho boloka matla a nano-building le nts'etsopele ea nanotechnology. E amohela tefo ka Credit Card, T/T, West Union le Paypal. TRUNNANO e tla romella thepa ho bareki ba mose ho maoatle ka FedEx, DHL, ka moea, kapa ka lewatle. Haeba u batla samente ea aluminate, ka kopo ikutloe u lokolohile ho ikopanya le rona le ho romela potso. (
Li-tag: calcium aluminate,calcium aluminate,samente ea aluminate
Lingoliloeng tsohle le litšoantšo li tsoa Marang-rang. Haeba ho na le litaba tsa copyright, ka kopo ikopanye le rona ka nako ho hlakola.
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