1. Mesebetsi ea Bohlokoa le Lipheo tse Molemo ho Theknoloji ea Sejoale-joale ea Konkreite
1.1 Mosebetsi le Mechanism of Concrete Foaming Agents
(Moemeli oa konkreite o foaming)
Lisebelisoa tsa "concrete lathering agents" ke metsoako e khethehileng ea lik'hemik'hale e etselitsoeng ho hlahisa le ho boloka molumo o laoloang oa libubble tsa moea ka har'a matrix a konkreite e ncha..
Baemeli bana ba sebetsa ka ho fokotsa tsitsipano ea holim'a metsi a tsoakaneng, ho etsa hore ho khonehe bakeng sa ntshetsopele ya tefiso, moea o qhalaneng ka ho lekana ho pholletsa le pherekano kapa motsoako.
Sepheo sa mantlha ke ho etsa konkreite ea cellular kapa konkreite e boima bo bobebe, moo li-bubble tsa moea tse kentsoeng li theolang boima bo akaretsang ba sehlahisoa se tiileng ha li ntse li boloka botsitso bo lekaneng ba meralo..
Li-lathering agents hangata li ipapisitse le li-surfactants tse tsoang ho protheine (joalo ka keratin ea hydrolyzed ho tsoa lihlahisoa tsa liphoofolo) kapa li-surfactants tsa maiketsetso (e nang le alkyl sulfonates, joala bo ethoxylated, kapa lihlahisoa tse tsoang ho acid e mafura), e 'ngoe le e' ngoe e fana ka ts'ireletso ea bubble e ikhethang le likarolo tsa moralo oa foam.
Foam e entsoeng e tlameha ho ba e tsitsitseng e lekaneng ho mamella ho kopanya, ho pompa, le mekhahlelo ea pele ea ho seta ntle le ho kopana ho feteletseng kapa ho putlama, ho etsa bonnete ba hore homogeneous mobile framework qetellong ea sehlahisoa.
Porosity ena e entsoeng ka boenjiniere e ntlafatsa mohatsela oa mocheso, fokotsa lithane tse shoeleng, le ho matlafatsa ho hanyetsa mollo, ho etsa konkreite e foamed e loketseng bakeng sa lits'ebetso tse joalo ka li-screeds tse sireletsang fatše, ho tlatsa lekhalo la meno, le liphanele tse entsoeng esale pele tsa boima bo bobebe.
1.2 Sepheo le Tsamaiso ea Li-Defoamers tsa Concrete
Ka papiso, li-defoam tsa konkreite (e tsejoang hape e le baemeli ba anti-foaming) li etselitsoe ho tlosa kapa ho fokotsa moea o sa batleheng o kentsoeng ka har'a motsoako oa konkreite.
Ho pholletsa le ho kopanya, sepalangoang, le ho beha maemo, moea o ka qetella o tšoasehile ka ho sa hlokomeleheng mokotleng oa samente ka lebaka la matšoenyeho, haholo sekontiri se metsi haholo kapa se ikopanyang (SCC) litsamaiso tse nang le lisebelisoa tse phahameng tsa superplasticizer.
Lipululana tsena tse hoheletsoeng hangata ha li lekane ka boholo, e qhalantsoeng hampe, le ho senya thepa ea mechine le e ntle ea konkreite e tiileng.
Li-defoams li sebetsa ka ho thefula li-bubble tsa moea sebopehong sa mokelikeli oa moea, papatso ea khokahanyo le ho taboha ha lifilimi tse tšesaane tse potileng li-bubble.
( Moemeli oa konkreite o foaming)
Hangata li entsoe ka oli e sa keneng (joalo ka oli ea diminerale kapa ea veggie), li-polymers tse thehiloeng ho siloxane (mohlala, polydimethylsiloxane), kapa likaroloana tse tiileng joalo ka silika ea hydrophobic, tse kenang filiming ea bubble le ho potlakisa ho ntša metsi le ho putlama.
Ka ho theola moea– ka kakaretso ho tloha likhato tse nang le bothata ho feta 5% ho fihlela ho 1– 2%– li-defoams li ntlafatsa ho tiea ha khatello, ntlafatsa ho koahela bokaholimo, le ho matlafatsa boima ba 'mele ka ho fokotsa ho kenella habonolo le ho ba kotsing ea ho qhibiliha ha leqhoa.
2. Sebopeho sa Lik'hemik'hale le Boitšoaro ba Sefahleho
2.1 Mehaho ea Limolek'hule ea Litsebi tse Foaming
Ho sebetsa hantle ha sekontiri sa konkreite ho hokahane haholo le sebopeho sa eona sa molek'hule le mosebetsi oa sefahleho.
Baemeli ba foaming ba liprotheine ba ipapisitse le li-polypeptide tse telele tse hlahang sebopehong sa basebelisi ba moea., ho etsa lifilimi tsa viscoelastic tse emang ho tabola le ho fana ka boima ba mochini maboteng a bubble.
Li-surfactants tsena tsa tlhaho kaofela li etsa lipululana tse kholo empa li tiile tse nang le mamello e ntle., ho etsa hore e be tse loketseng bakeng sa konkreite e bobebe ea sebopeho.
Liemeli tse entsoeng ka frothing, ka lehlakoreng le leng le fapaneng, e sebetsana le maemo a betere mme ha e amehe haholo ho mefuta e fapaneng ea k'hemistri ea metsi kapa boemo ba mocheso.
Li theha tse nyane, li-bubble tse tsitsitseng haholoanyane ka lebaka la tsitsipano ea tsona e fokotsehileng sebakeng le kinetics ea adsorption e potlakileng., ho etsa hore meaho e metle ea pore le ts'ebetso e ntlafetseng ea mocheso.
Theko ea bohlokoa ea micelle (CMC) le hydrophilic-lipophilic balance (HLB) ea surfactant e tsebahatsa ts'ebetso ea eona ho hlahisa foam le botsitso tlasa shear le cementitious alkalinity..
2.2 Mehaho ea Limolek'hule ea Defoamers
Li-defoam li sebetsa ka sesebelisoa se fapaneng haholo, ho itshetleha ka ho se tshwane le kgohlano ya sefahleho.
Li-defoam tse entsoeng ka silicone, haholo-holo polydimethylsiloxane (PDMS), li sebetsa hantle haholo ka lebaka la tsitsipano ea tsona e tlase haholo (~ 20– 25 mN/m), e di dumellang ho hasana ka potlako sebakeng sa dipudula tsa moya.
Ha lerotholi la defoamer le kopana le filimi ea bubble, e hlahisa a “borokho” pakeng tsa libaka tse peli tse holim'a filimi, ho hlahisa metsi le ho petsoha.
Li-defoam tse entsoeng ka oli li sebetsa ka tsela e ts'oanang empa ha li tšepahale haholo mefuteng e mengata ea mokelikeli moo ho phalla ka potlako ho ka fokotsang ketso ea bona..
Li-defoam tsa Hybrid tse kenyelletsang likaroloana tsa hydrophobic li matlafatsa ts'ebetso ka ho fana ka libaka tsa nucleation bakeng sa bubble coalescence..
Ho fapana le li-lathering agents, li-defoamers li lokela ho qhibiliha ka mokhoa o itekanetseng hore li tsoele pele ho sebetsa ka har'a sehokelo sa mosebelisi ntle le ho kenyelletsoa ho li-micelles kapa ho qhibiliha sethaleng sa bongata..
3. Tšusumetso ho Sebopeho sa Konkreite e Ncha le e Haretsoeng
3.1 Tšusumetso ea Baemeli ba Foaming ka Ts'ebetso ea Konkreite
Ho kenngoa ha moea ka boomo ka baemeli ba foaming ho fetola sebopeho sa 'mele sa konkreite, ho e suthisa ho tloha motsoakong o motenya ho isa sebakeng se kenoang ke metsi, sehlahisoa se bobebe bo bobebe.
Botenya bo ka theoleloa ho tloha ho tloaelehileng 2400 kg/m 5 ho isa tlase ho 400– 800 kg/m³, ho itšetlehile ka molumo oa foam le botsitso.
Phokotso ena e amana ka kotloloho le conductivity e tlase ea mocheso, ho etsa konkreite e foamed thepa e sireletsang e sebetsang ka boleng ba U e loketseng ho aha lienfelopo.
Leha ho le joalo, porosity e matlafalitsoeng e boetse e baka phokotso ea boima ba khatello, e hlokang taolo e hlokolosi ea lethal dose le hangata ho kenyelletsoa ha lisebelisoa tse eketsehileng tsa samente (Li-SCM) joalo ka molora oa fofa kapa mosi oa silika ho ntlafatsa matla a lebota la pore.
Ho sebetsa hangata ho phahame ka lebaka la sephetho sa lubricating ea li-bubble, leha ho le joalo karohano e ka etsahala haeba ts'ireletso ea foam e sa lekana.
3.2 Tšusumetso ea li-Defoamers ka Ts'ebetso ea Concrete
Li-defoamers li ntlafatsa boleng bo phahameng ba konkreite e tloaelehileng le e sebetsang hantle ka ho felisa mathata a bakoang ke moea o koaletsoeng..
Libaka tsa moea tse feteletseng li sebetsa e le li-concentrators tsa khatello ea kelello le matšoenyeho 'me li fokotsa karolo e ka tšeptjoang ea ho jara moroalo, ho baka matla a tlase a ho hatella le ho kokobetsa.
Ka ho fokotsa libaka tsena, li-defoams li ka eketsa boima ba khatello ka 10– 20%, haholo-holo metsoakong e matla haholo moo phesente e 'ngoe le e 'ngoe ea molumo oa moea e leng bohlokoa.
Li boetse li ntlafatsa boleng ba boleng bo holimo ka ho qoba ho phunya, masoba a dikokoanyana, le mahe a linotsi, e leng ea bohlokoa ho konkreite ea meralo le lits'ebetso tse shebaneng le sebopeho.
Meahong e se nang pores joalo ka lijana tsa metsi kapa likamore tse ka tlase, ho theola porosity ho matlafatsa khanyetso ho phihlello ea chloride le carbonation, ho atolosa nako ya bophelo.
4. Maemo a Kopo le Lintlha tsa Tšebelisano Tseo U Lokelang ho li Nahana
4.1 Maemo a Tloaelehileng a Tšebeliso ea Liemeli tse Foaming
Li-frothing agents li bohlokoa tlhahisong ea konkreite ea cellular e sebelisoang ka har'a likarolo tsa ho kenya mocheso oa mocheso, marulelo a marulelo, le li-block tsa precast tse bobebe.
Li sebelisoa ka mokhoa o ts'oanang lits'ebetsong tsa geotechnical joalo ka ho tlatsa lithapo le ho tsitsisa lekhalo., moo boima bo fokolang bo emisang ho tlala ditshila tse ka tlase.
Li-setting tse lekantsoeng ka mollo up, thepa ea bolulo kapa ea khoebo ea konkreite e nang le makoeba e fana ka tšireletso e sa fetoheng ea mollo bakeng sa likarolo tsa meralo..
Katleho ea lits'ebetso tsena e itšetlehile ka lisebelisoa tse khethehileng tsa ho hlahisa foam, sireletsehileng lathering baemeli, le mekhoa e nepahetseng ea ho kopanya ho etsa hore moea o phalle ka tsela e tšoanang.
4.2 Mekhoa e Tloaelehileng ea Tšebeliso ea Li-Defoamers
Hangata li-defoam li sebelisoa ka konkreite e ikopanyang (SCC), moo metsi a mangata le li-superplasticizer li eketsang kotsi ea ho koaleha moea.
Li boetse li bohlokoa ho konkreite ea precast le ea meralo, moo ho fela ho leng bohlokoa haholo, le sebakeng sa konkreite e ka tlas'a metsi, moo moea o kenngoeng o ka senyang tlamahano le botsitso.
Hangata li-defoam li eketsoa ka litekanyetso tse nyane (0.01– 0.1% ka boima ba samente) 'me e tlameha ho lumellana le metsoako e meng, haholo-holo polycarboxylate ethers (Li-PCE), ho qoba likamano tse mpe.
Ho phethela, konkreite frothing baemeli le defoamers emela 2 ho hanyetsa leha ho le joalo maano a bohlokoa a tsamaiso ea moea ka har'a litsamaiso tsa cementitious.
Le hoja li-frothing agents li hlahisa moea ka boomo ho finyella boima bo bobebe le ho sireletsa matlo, li-defoams li felisa moea o sa batleheng ho matlafatsa matla le boleng ba boleng bo holimo.
Ho hlokomela lik'hemik'hale tsa bona tse ikhethang, lisebelisoa, 'me liphetho li etsa hore ho khonehe ho baenjiniere le bahlahisi ho eketsa katleho ea konkreite bakeng sa mefuta e fapaneng ea meralo, tshebetso, le litlhoko tsa botle.
Mofani
Cabr-Concrete ke morekisi oa Concrete Admixture 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 boleng bo holimo Concrete Admixture, ka kopo ikutloe u lokolohile ho ikopanya le rona le ho romela potso.
Li-tag: konkreite e phophomang maqeba,theko ea konkreite e foaming agent,moemedi wa konkreite
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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