Li-admixtures tse fokotsang metsi (WRA) le li-superplasticizers ke metsoako ea lik'hemik'hale e sebelisoang ka metsoako ea konkreite ho ntlafatsa ts'ebetso ea eona le ho fokotsa metsi ntle le ho ama matla a sehlahisoa sa ho qetela.Tlhalosong ena e qaqileng, re tla shebisisa ka botebo phapang pakeng tsa mefuta ena e 'meli ea li-additives, ho hlahloba metsoako ea tsona, mekhoa ea ts'ebetso, melemo le ts'ebeliso ea indasteri ea kaho.
A.1.Setsi sa ho fokotsa metsi (WRA):
Motsoako o fokotsang metsi, o tsejoang hape e le plasticizer kapa motsoako o fokotsang metsi, ke motsoako oa lik'hemik'hale o etselitsoeng ho fokotsa bongata ba metsi a hlokahalang motsoako oa konkreite ntle le ho ama thepa ea ona hampe.Lisebelisoa tsena haholo-holo li sebetsa e le li-dispersants, li thusa ho hasana ha likaroloana tsa samente le ho khothalletsa metsi a betere.Sepheo se seholo sa WRA ke ho ntlafatsa ts'ebetso ea konkreite ka ho fokotsa tekanyo ea metsi-samente, e leng se ka lebisang melemo e sa tšoaneng nakong ea kaho.
2. Mesebetsi:
Li-WRA hangata ke metsoako ea lintho tse phelang tse kang lignosulfonates, sulfonated melamine formaldehyde (SMF), sulfonated naphthalene formaldehyde (SNF), le polycarboxylate ethers (PCE).
Lignosulfonates li tsoa ho makhasi a lehong 'me ke e' ngoe ea mefuta ea pele ea ho fokotsa metsi.
SMF le SNF ke li-polymer tsa maiketsetso tse sebelisoang haholo indastering.
PCE ke WRA ea sejoale-joale e tsebahalang ka ts'ebetso ea eona e phahameng le ho feto-fetoha ha maemo.
3. Mokhoa oa ts'ebetso:
Mochine ona o kenyelletsa ho kenngoa ha ntho e fokotsang metsi holim'a likaroloana tsa samente, ho etsa hore likaroloana tsena li qhalane.
Phatlalatso ena e fokotsa matla a interparticle, e leng se etsang hore ho be le metsi a ntlafetseng le ho sebetsa ha motsoako oa konkreite.
4.Melemo:
E ntlafatsa ts'ebetso: WRA e ntlafatsa phallo le ho pompa ha konkreite, ho etsa hore ho be bonolo ho e beha le ho e qeta.
E fokotsa Mongobo: Ka ho fokotsa tekanyo ea samente ea metsi, WRA e thusa ho eketsa matla le ho tšoarella ha konkreite e thata.
Tšebelisano e Molemo: Phello ea ho qhalakanngoa ea WRA e ntlafatsa homogeneity ea motsoako, kahoo e ntlafatsa bonngoe le ho fokotsa karohano.
5.Kopo:
WRA e ka sebelisoa mefuteng e mengata ea kaho ea konkreite ho kenyeletsoa merero ea bolulo, ea khoebo le ea meaho.
Li bohlokoa ka ho khetheha moo ts'ebetso e phahameng le mongobo o tlase li leng bohlokoa.
B.1.Sesebelisoa sa ho fokotsa metsi se sebetsang hantle haholo:
Li-superplasticizers, tseo hangata li bitsoang li-superplasticizers, li emela sehlopha se tsoetseng pele le se sebetsang hantle ka har'a sehlopha se pharaletseng sa li-superplasticizers.Li-additives tsena li fana ka bokhoni bo phahameng ba ho fokotsa metsi ha li ntse li boloka kapa li ntlafatsa thepa e meng e lakatsehang ea konkreite.
2. Mesebetsi:
Lisebelisoa tse fokotsang metsi tse sebetsang hantle haholo li kenyelletsa polycarboxylate ethers (PCE) le polynaphthalene sulfonates e fetotsoeng.
PCE e tsejoa ka moralo oa eona oa limolek'hule o lumellang taolo e nepahetseng ea ho hasana le ho fokotsa metsi.
3. Mokhoa oa ts'ebetso:
Joalo ka li-superplasticizer tsa setso, li-superplasticizers li sebetsa ka ho bapatsa ka likaroloana tsa samente le ho baka ho hasana.
Sebopeho sa limolek'hule tsa PCE se lumella ho laola le ho feto-fetoha ha maemo ho finyella litšobotsi tse lakatsehang tsa ts'ebetso.
4.Melemo:
Phokotso e Phahameng ea Metsi: Li-WRA tse sebetsang hantle haholo li ka fokotsa metsi haholo, hangata li feta bokhoni ba li-WRA tse tloaelehileng.
Matla a ntlafetseng: Mahlahana ana a na le thepa e babatsehang ea ho phalla 'me a loketse ho sebelisoa ka konkreite e iketsetsang le lisebelisoa tse ling tse hlokang ho sebetsa ka mokhoa o phahameng.
Ts'ebetso e ntlafalitsoeng ea ho putlama: Li-WRA tse ling tse sebetsang hantle haholo li ka lelefatsa ho bolokoa ha litšila, ka hona, tsa eketsa nako ea ho sebetsa ntle le ho ama ts'ebetso ea konkreite.
5.Kopo:
Li-superplasticizers li ka sebelisoa lits'ebetsong tse fapaneng, ho kenyeletsoa konkreite e matla haholo, konkreite e ikemetseng, le merero e nang le litlhoko tse thata tsa nako e telele.
C. Liphapang tse kholo:
1. Katleho:
Phapang e kholo ke bokhoni ba ho fokotsa metsi.Li-regenerator tsa metsi tse sebetsang hantle haholo li ka fokotsa metsi haholo ho feta li-regenerator tsa setso.
2. Moralo oa limolek'hule:
Li-WRA tse sebetsang hantle haholo, haholo-holo li-PCE, li na le liqapi tse rarahaneng tsa limolek'hule tse lumellang hore ho be le taolo e nepahetseng ea liphello tsa ho hasana.
3. Ho sebetsa le ho boloka ho putlama:
WRA e sebetsang hantle ka kakaretso e na le bokhoni bo betere ba ho sebetsa le bokhoni ba ho boloka ho putlama, ho etsa hore e tšoanelehe bakeng sa mefuta e mengata ea lits'ebetso tsa konkreite.
4. Litšenyehelo:
WRA e sebetsang hantle haholo e kanna ea bitsa chelete e ngata ho feta WRA ea setso, empa ts'ebetso ea eona e phahameng e lokafatsa tšebeliso ea eona mererong e itseng e hlokang ts'ebetso e tsoetseng pele.
Metsoako e fokotsang metsi le li-superplasticizers li bapala karolo ea bohlokoa ho ntlafatseng likarolo tsa motsoako oa konkreite.Le hoja li-WRA tse tloaelehileng li 'nile tsa sebelisoa ka katleho ka lilemo tse ngata, li-WRA tse sebetsang hantle haholo, haholo-holo li-PCE, li emela tharollo e tsoetseng pele e fanang ka bokhoni bo phahameng ba ho fokotsa metsi le litšobotsi tse ntlafetseng tsa ts'ebetso.Khetho pakeng tsa tse peli e itšetlehile ka litlhoko tse khethehileng tsa morero oa kaho le tekanyo e lakatsehang pakeng tsa litšenyehelo le tshebetso.
Nako ea poso: Jan-25-2024