Kakaretso:
Li-admixtures tse fokotsang metsi li phetha karolo ea bohlokoa mekhoeng ea morao-rao ea kaho, ho ntlafatsa ts'ebetso le ts'ebetso ea konkreite ha li ntse li fokotsa mongobo. Ha litaba tsa nts'etsopele ea moshoelella le tikoloho li ntse li tsoela pele ho hlokomeloa, tlhoko ea li-agent tse fokotsang metsi tse sebetsang hantle haholo e eketsehile.
tsebisa:
Li-admixtures tse fokotsang metsi, tse tsejoang hape e le li-superplasticizers, li fetohile tsa bohlokoa indastering ea kaho ho ntlafatsa ts'ebetso ea konkreite. Mahlahana ana a etselitsoe ho ntlafatsa phallo ea motsoako oa konkreite ntle le ho ama matla a eona, kahoo a thusa ho eketsa katleho ea kaho. Tsepamiso ea maikutlo holim'a kaho ea moshoelella e tsamaisitse nts'etsopele ea li-superplasticizers, e leng se susumetsang bahlahisi ho hlahloba litharollo tse ncha.
Bohlokoa ba sesebelisoa se fokotsang metsi:
Metsi ke karolo ea bohlokoa ea motsoako oa konkreite, empa metsi a mangata haholo a ka lebisa mathateng a fapaneng joalo ka matla a fokotsehileng, ho kenella ha metsi, le linako tse telele tsa ho beha. Metsoako e fokotsang metsi e rarolla mathata ana ka ho fokotsa metsi ha e ntse e boloka ts'ebetso e hlokahalang le thepa ea konkreite. Sena se bohlokoa haholo molemong oa mekhoa ea moaho e tsitsitseng le tlhoko ea ntlafatso ea lisebelisoa.
Mefuta ea lisebelisoa tse fokotsang metsi:
Ho na le mefuta e 'maloa ea lisebelisoa tse fokotsang metsi, ho akarelletsa lignosulfonates, sulfonated naphthalene formaldehyde condensates, le polycarboxylate ethers. Mofuta o mong le o mong o na le thepa e ikhethang 'me katleho ea oona e itšetlehile ka litlhoko tse khethehileng tsa morero oa kaho. Baetsi ba sebelisa mekhoa e fapaneng ea lik'hemik'hale le mekhoa ea tlhahiso ho hlahisa li-superplasticizers tse loketseng lisebelisoa tse fapaneng.
Mokhoa oa tlhahiso:
A. Lignosulfonate:
Lignosulfonates li nkiloe ts'ebetsong ea ho hula lehong, 'me tlhahiso ea tsona e kenyelletsa sulfite pulping. Ho phekola patsi ka metsoako ea sulfite ho etsa hore lignin e arohane le likhoele tsa cellulose. Lignosulfonate e hlahisoang e ka sebetsa e le moemeli ea atlehang oa ho fokotsa metsi ka lebaka la thepa ea eona ea ho hasana. Ts'ebetso ea tlhahiso e hloka taolo e hlokolosi ea mahloriso a sulfite le maemo a karabelo ho fihlela ts'ebetso e lakatsehang.
b. Sulfonated naphthalene formaldehyde condensate (SNF):
Tlhahiso ea SNF superplasticizer e kenyelletsa condensation ea naphthalene, formaldehyde le sulfonating agents. Ts'ebetso ena e hlahisa lihlahisoa tsa sulfonated tse nang le thepa ea ho qhalakanya le ea polasetiki. Sebopeho sa limolek'hule le tekanyo ea sulfonation li na le phello e kholo ts'ebetsong ea SNF superplasticizer. Baetsi ba fana ka taolo e nepahetseng holim'a liparamente tsa karabelo ho fihlela tekano e lakatsehang lipakeng tsa ho sebetsa le matla.
C. Polycarboxylate ethers (PCE):
Moemeli oa ho fokotsa metsi oa Perchlorethylene o emela mofuta o mocha le o tsoetseng pele oa ho fokotsa metsi ka mokhoa o phahameng. Ho etsoa ha tetrachlorethylene ho kenyelletsa copolymerization ea acrylic acid le li-monomers tse ling, e leng se hlahisang polima e nang le sebopeho se kang khekhe. Sebopeho sena se ikhethang se fana ka bokhoni bo phahameng ba ho hasana ho fokotsa metsi haholo ntle le ho ama ts'ebetso ea motsoako oa konkreite. Tlhahiso ea tetrachlorethylene e kenyelletsa mekhoa e rarahaneng ea polymerization le taolo e nepahetseng ea sebopeho sa limolek'hule.
Tsoelo-pele ea lisebelisoa tse fokotsang metsi tse sebetsang hantle haholo:
A. Nanotechnology Integration:
Lilemong tsa morao tjena, bafuputsi le bahlahisi ba ile ba hlahloba ho kenyelletsa nanotechnology ho li-superplasticizers. Li-nanoparticles li ka ntlafatsa thepa ea ho hasana ea li-agent tsena, tsa fokotsa metsi a mangata. Mokhoa ona ha o ntlafatse ts'ebetso ea metsoako ea konkreite feela, empa hape o bula lemati la lits'ebetso tse ncha tsa lisebelisoa tse bohlale le tsa ho iphekola.
b. Boikemisetso bakeng sa lisebelisoa tse khethehileng:
Li-admixtures tse fokotsang metsi tse sebetsang hantle haholo li se li ntse li etsoa bakeng sa lisebelisoa tse khethehileng, tse kang "self-compacting concrete" (SCC) le "high-performance concrete" (HPC). Sebopeho sa lik'hemik'hale le sebopeho sa limolek'hule tsa li-reagents tsena li etselitsoe ho kopana le litlhoko tse ikhethang tsa merero e fapaneng, ho netefatsa ts'ebetso e nepahetseng le ts'ebeliso ea lisebelisoa.
C. Green Chemistry Initiative:
Baetsi ba ntse ba tsoela pele ho amohela melao-motheo ea k'hemistri e tala tlhahisong ea li-superplasticizers. Sena se kenyelletsa ho sebelisa thepa e tala e ka nchafatsoang, ho fokotsa litšila le ho fokotsa tšusumetso ea tikoloho ea ts'ebetso ea tlhahiso. Li-superplasticizers tse tala li tsamaisana le khatello e ntseng e hola ea indasteri mabapi le ts'ebetso le ho kenya letsoho mekhoeng ea kaho e baballang tikoloho.
d. Ho lumellana le Lisebelisoa tsa Cementitious tsa Tlatsetso (SCM):
Ho kenngoa ha lisebelisoa tsa cementitious tsa bobeli tse kang fly ash le slag ho tloaelehile mekhoeng e tsitsitseng ea konkreite. Re etsa li-superplasticizers ho ntlafatsa tšebelisano le lisebelisoa tsena, ho netefatsa hore melemo ea phokotso ea metsi ha e fokotsehe ha o sebelisa SCM.
Mathata le litebello tsa kamoso:
Leha ho na le tsoelo-pele e kholo ea li-superplasticizers, mathata a ntse a le teng. Tsena li kenyelletsa tlhoko ea mekhoa e emeng ea tlhahlobo, ho sebetsana le litlamorao tse ka bang teng tsa li-reagents tse itseng mabapi le ho tšoarella ha nako e telele, le ho netefatsa hore li tsamaellana le lisebelisoa tse fapaneng tsa samente. Litebello tsa kamoso tsa li-superplasticizers li hloka lipatlisiso tse tsoelang pele le nts'etsopele ho hlola mathata ana le ho ntlafatsa ts'ebetso le ts'ebetso ea kaho ea konkreite.
ha re phethela:
Ho etsoa ha li-superplasticizers ke tšimo e matla e lulang e fetoha ho fihlela tlhokahalo e ntseng e eketseha ea mekhoa e tsitsitseng ea ho haha. Ho hlahisa litharollo tse tsoetseng pele tse sutumetsang meeli ea ts'ebetso le boikarabello ba tikoloho. Ka lipatlisiso tse tsoelang pele mabapi le nanotechnology, ho iketsetsa likopo tse khethehileng, matsapa a k'hemistri e tala, le ho lumellana ho ntlafalitsoeng le thepa ea bobeli ea samente, bokamoso ba li-superplasticizers bo shebahala joalo ka ho kenya letsoho molemong oa lisebelisoa tse tsitsitseng le tse tsitsitseng. Bokamoso bo khanya.
Nako ea poso: Dec-05-2023