Cellulose ethers ke mofuta oa metsoako ea organic polymer e fetotsoeng ka lik'hemik'hale ho tloha selulose ea tlhaho. Hangata li sebelisoa ka thepa ea mohaho, haholo-holo ka thepa e entsoeng ka samente. Tšusumetso ea cellulose ether ts'ebetsong ea samente ea hydration e bonahala haholo-holo likarolong tse latelang: ho qhalakanngoa ha likaroloana tsa samente, ho boloka metsi, phello e boima, le tšusumetso ho morphology le nts'etsopele ea matla a lihlahisoa tsa samente hydration.
1. Kenyelletso ea samente hydration
Ts'ebetso ea hydration ea samente ke letoto la liphetoho tse rarahaneng tsa 'mele le lik'hemik'hale lipakeng tsa samente le metsi. Maikutlo ana a etsa hore peista ea samente e thatafale butle-butle ho theha sebopeho se tiileng, qetellong se hlahisa lihlahisoa tsa hydration tse kang calcium silicate hydrate (CSH) le calcium hydroxide (CH). Nakong ea ts'ebetso ena, tekanyo ea hydration ea samente, metsi le ho boloka metsi a slurry, le ho thehoa ha lihlahisoa tsa hydration ho ama ka ho toba matla le ho tšoarella ha konkreite ea ho qetela.
2. Mokhoa oa ts'ebetso ea cellulose ethers
Cellulose ether e bapala karolo ea bohlokoa ea taolo ea 'mele le lik'hemik'hale ts'ebetsong ea samente ea hydration. Cellulose ether e ama haholo-holo ts'ebetso ea hydration ea samente ka litsela tse peli: e 'ngoe ke ka ho ama kabo le ho fetoha mouoane ha metsi ka har'a slurry ea samente; e 'ngoe ke ka ho ama ho hasana le ho hoama ha likaroloana tsa samente.
Taolo ea mongobo le ho boloka metsi
Li-cellulose ethers li ka ntlafatsa haholo ho bolokoa ha metsi linthong tse entsoeng ka samente. Ka lebaka la hydrophilicity ea eona e matla, cellulose ether e ka etsa tharollo e tsitsitseng ea colloidal ka metsing, e ka monyang le ho boloka mongobo. Bokhoni bona ba ho ts'oara metsi bo bohlokoa ho fokotsa mapetsong a bakoang ke tahlehelo e potlakileng ea metsi ka konkreite nakong ea phallo ea pele ea metsi. Haholo-holo libakeng tse omeletseng kapa maemo a kaho ea mocheso o phahameng, cellulose ether e ka thibela ka katleho hore metsi a se ke a fetoha mouoane ka potlako le ho etsa bonnete ba hore metsi a mangata ka har'a slurry ea samente e lekane ho tšehetsa mokhoa o tloaelehileng oa hydration.
Rheology le Thickening
Li-cellulose ethers li ka boela tsa ntlafatsa rheology ea li-slurries tsa samente. Ka mor'a ho eketsa cellulose ether, ho lumellana ha slurry ea samente ho tla eketseha haholo. Ketsahalo ena haholo-holo e amahanngoa le sebopeho sa ketane e telele e entsoeng ke limolek'hule tsa cellulose ether metsing. Molek'hule ena ea ketane e telele e ka thibela ho tsamaea ha likaroloana tsa samente, kahoo e eketsa viscosity le ho tsitsa ha slurry. Thepa ena e bohlokoa ka ho khetheha lits'ebetsong tse kang ho polaster le likhomaretsi tsa lithaele, kaha e thibela seretse sa samente ho phalla kapele ha se fana ka ts'ebetso e ntle ea kaho.
Liehisa metsi 'me u fetole nako ea ho seta
Cellulose ether e ka liehisa karabelo ea hydration ea samente mme ea eketsa boemo ba pele le nako ea ho qetela ea nako ea seretse sa samente. Phello ena e etsahala hobane limolek'hule tsa cellulose ether li adsorbed holim'a likaroloana tsa samente, li etsa mokoallo o thibelang ho kopana ka ho toba pakeng tsa metsi le likaroloana tsa samente, kahoo li fokotsa karabelo ea hydration. Ka ho lieha ho beha nako, li-cellulose ethers li ka ntlafatsa tšebetso ea kaho, tsa fa basebetsi ba kaho nako e eketsehileng ea ho etsa liphetoho le ho lokisa.
3. Phello ho mofuta oa lihlahisoa tsa samente tsa hydration
Ho ba teng ha cellulose ethers ho boetse ho ama microstructure ea lihlahisoa tsa samente hydration. Liphuputso li bontšitse hore morphology ea gel ea calcium silicate hydrate (CSH) e tla fetoha ka mor'a ho eketsa cellulose ether. Limolek'hule tsa cellulose ether li ka ama sebopeho sa kristale sa CSH, sa etsa hore se hlephe le ho feta. Sebopeho sena se hlephileng se ka fokotsa matla a pele ho isa tekanyong e itseng, empa hape se thusa ho ntlafatsa ho tiea ha thepa.
Li-cellulose ethers li ka boela tsa fokotsa ho thehoa ha ettringite nakong ea ts'ebetso ea hydration. Kaha cellulose ether e fokotsa lebelo la ho itšoara ka metsi, tekanyo ea ho thehoa ha ettringite ka samente e fokotsehile, kahoo e fokotsa khatello ea ka hare e bakoang ke ho atolosoa ha molumo nakong ea ho phekola.
4. Phello ho nts'etsopele ea matla
Li-cellulose ethers li boetse li na le tšusumetso e kholo ho nts'etsopele ea matla a thepa e thehiloeng ho samente. Hobane li-cellulose ethers li liehisa sekhahla sa ho phalla ha samente, matla a pele a matla a lipese tsa samente hangata a lieha. Leha ho le joalo, ha karabelo ea hydration e ntse e tsoela pele, phello e laolang ea ho boloka metsi a cellulose ether le hydration sehlahisoa morphology e ka hlaha butle-butle, e leng ho tla thusa ho ntlafatsa matla nakong ea morao-rao.
Hoa lokela ho hlokomeloa hore palo e eketsehileng le mofuta oa cellulose ether li na le tšusumetso e 'meli ho matla. Palo e loketseng ea cellulose ether e ka ntlafatsa ts'ebetso ea kaho le ho eketsa matla hamorao, empa tšebeliso e feteletseng e ka lebisa ho fokotseha ha matla a pele a lisebelisoa tse thehiloeng ho samente le ho ama thepa ea ho qetela ea mochini. Ka hona, lits'ebetsong tse sebetsang, mofuta le litekanyetso tsa cellulose ether li hloka ho ntlafatsoa le ho raloa ho latela litlhoko tse khethehileng tsa boenjiniere.
Cellulose ether e ama ts'ebetso ea hydration le thepa ea samente ka ho ntlafatsa ho bolokoa ha metsi a thepa e thehiloeng ho samente, ho lokisa sekhahla sa hydration, le ho ama mofuta oa lihlahisoa tsa hydration. Le hoja li-cellulose ethers li ka baka tahlehelo ea matla a pele, li ka ntlafatsa ho tšoarella le ho tiea ha konkreite ka nako e telele. Ho eketsoa ha cellulose ether ho ka boela ha ntlafatsa haholo ts'ebetso ea kaho, haholo-holo maemong a kopo a hlokang nako e telele ea ho sebetsa le litlhoko tse phahameng tsa ho boloka metsi. E na le melemo e ke keng ea nkeloa sebaka. Lits'ebetsong tsa 'nete tsa boenjiniere, khetho e utloahalang ea mofuta le tekanyo ea cellulose ether e ka leka-lekanya matla, ts'ebetso ea kaho le litlhoko tsa nako e telele tsa thepa.
Nako ea poso: Sep-27-2024