Metswako e Fokotsang Metsi ka Bokgoni bo Hodimo: Ho Ntlafatsa Tshebetso ya Konkreite bakeng sa Kaho e Tala
Masimo a Maholo a Kopo
Metswako e fokotsang metsi e sebetsang hantle haholo (joalo ka metsoako e thehiloeng ho polycarboxylate) e emela mofuta o tsoetseng pele ka ho fetisisa oa metsoako e fokotsang metsi e fumanehang 'marakeng. Li sebetsa ka ho etsa lera la ho hasana holim'a likaroloana tsa samente, li thibela ho bokellana ha likaroloana tsa samente 'me ka hona li ntlafatsa phallo le bokhoni ba ho sebetsa ba konkreite. Phello ena ea ho hasana ha e fokotse feela tšebeliso ea metsi empa hape e eketsa bongata le matla a konkreite. Ha e bapisoa le metsoako ea setso e fokotsang metsi, mefuta e sebetsang hantle e fana ka sekhahla se phahameng sa phokotso ea metsi (hangata 25%-40%) le litlhoko tse tlase tsa tekanyo (hangata 0.1%-0.3% ea kakaretso ea thepa e sebelisang samente), ka tšusumetso e nyane ea tikoloho.
Mererong ea kaho, tšebeliso ea metsoako e fokotsang metsi e ka ntlafatsa haholo matla a ho hatelloa le ho hanyetsa metsi ha konkreite, e leng se eketsang bophelo ba ts'ebeletso ea meaho. Mohlala, kahong ea meaho e melelele le marokho a maholo, metsoako e fokotsang metsi e sebetsang hantle e netefatsa hore konkreite e phalla hantle tlas'a litlhoko tsa matla a phahameng, e nolofatsa ts'ebetso ea kaho. Ho feta moo, metsoako e fokotsang metsi e ka fokotsa ho tsoa mali le karohano konkreiteng, ea ntlafatsa ho tšoana le botsitso ba eona.
Lefapheng la kaho e tala, litšobotsi tsa tikoloho tsa metsoako e fokotsang metsi li bohlokoa haholo. Tšebeliso ea metsoako e fokotsang metsi e sebetsang hantle e ka fokotsa tšebeliso ea samente, ka hona ea fokotsa mosi o tsoang khabone. Ho feta moo, metsoako ena e ka ntlafatsa ho tšoarella ha konkreite, ea fokotsa litšenyehelo tsa tlhokomelo le tšebeliso ea mehloli bakeng sa mehaho. Metsoako e mengata e fokotsang metsi e sebetsang hantle le eona e fumane mangolo a machaba a tikoloho, a lumellanang le lipheo tsa nts'etsopele e tsitsitseng ea kaho e tala.
Ka ntshetsopele e tswelang pele ya theknoloji ya kaho, ditshebediso tsa metsoako e fokotsang metsi le tsona di ntse di atoloha. Mohlala, konkreiteng e sebetsang hantle (HPC) le konkreite e ikgomaretsang (SCC), metsoako e fokotsang metsi ke di-additives tsa bohlokwa tse netefatsang thepa ya konkreite e ikgomaretsang tlasa maemo a phahameng a boima le matla. Ho feta moo, metsoako e fokotsang metsi e ka sebediswa mmoho le metsoako e meng e kopanyang metsi (jwalo ka di-retarder le di-air-entraining agents) ho ntlafatsa thepa ya konkreite haholo.
Mererong ea kaho, tšebeliso ea metsoako e fokotsang metsi e ka ntlafatsa haholo matla a ho hatelloa le ho hanyetsa metsi ha konkreite, e leng se eketsang bophelo ba ts'ebeletso ea meaho. Mohlala, kahong ea meaho e melelele le marokho a maholo, metsoako e fokotsang metsi e sebetsang hantle e netefatsa hore konkreite e phalla hantle tlas'a litlhoko tsa matla a phahameng, e nolofatsa ts'ebetso ea kaho. Ho feta moo, metsoako e fokotsang metsi e ka fokotsa ho tsoa mali le karohano konkreiteng, ea ntlafatsa ho tšoana le botsitso ba eona.
Lefapheng la kaho e tala, litšobotsi tsa tikoloho tsa metsoako e fokotsang metsi li bohlokoa haholo. Tšebeliso ea metsoako e fokotsang metsi e sebetsang hantle e ka fokotsa tšebeliso ea samente, ka hona ea fokotsa mosi o tsoang khabone. Ho feta moo, metsoako ena e ka ntlafatsa ho tšoarella ha konkreite, ea fokotsa litšenyehelo tsa tlhokomelo le tšebeliso ea mehloli bakeng sa mehaho. Metsoako e mengata e fokotsang metsi e sebetsang hantle le eona e fumane mangolo a machaba a tikoloho, a lumellanang le lipheo tsa nts'etsopele e tsitsitseng ea kaho e tala.
Ka ntshetsopele e tswelang pele ya theknoloji ya kaho, ditshebediso tsa metsoako e fokotsang metsi le tsona di ntse di atoloha. Mohlala, konkreiteng e sebetsang hantle (HPC) le konkreite e ikgomaretsang (SCC), metsoako e fokotsang metsi ke di-additives tsa bohlokwa tse netefatsang thepa ya konkreite e ikgomaretsang tlasa maemo a phahameng a boima le matla. Ho feta moo, metsoako e fokotsang metsi e ka sebediswa mmoho le metsoako e meng e kopanyang metsi (jwalo ka di-retarder le di-air-entraining agents) ho ntlafatsa thepa ya konkreite haholo.
Litlhaloso
| Lebitso la Sehlahisoa | Sodium Naphthalene Sulphonate Formaldehyde (SNF/PNS/FDN/NSF) | |||||||||
| Mabitso a Mang | Poly Naphthalene Sulfonate | |||||||||
| Naphthalene e nang le Sulfonate Formaldehyde | ||||||||||
| Superplasticizer e Thehiloeng ho Naphthalene | ||||||||||
| Sekhahla sa Sodium Sulphate | 5% 10% 18% | |||||||||
| Ponahalo | Phofo e sootho e bobebe | |||||||||
| Ho paka | Mokotla oa 25KG | |||||||||
| NOMORO EA CAS | 36290-04-7 | |||||||||
| Khoutu ea HS | 38244010 | |||||||||
| Bongata | 14-15MTS Bakeng sa 20'FCL | |||||||||
| Kopo | Motsoako oa konkreite, o ntlafatsa phallo | |||||||||
Leqephe la Taolo ea Boleng
| LINTHO | SNF-A | SNF-B | SNF-C | ||||
| Dikahare tse Tiileng ≥ | 92% | 92% | 92% | ||||
| Boleng ba PH | 7-9 | 7-9 | 7-9 | ||||
| Dikahare tsa di-chloride ≤ | 0.30% | 0.40% | 0.50% | ||||
| Dikahare tsa Sodium Sulfate ≤ | 5% | 10% | 18% | ||||
| Nete ea Starch Fluidity (mm) ≥ | 250 | 240 | 230 | ||||
| Sekhahla se Phahameng sa ho Fokotsa Metsi (%) | 26 | 25 | 23 |
Ka kakaretso
Metswako e fokotsang metsi ke ditlatsetso tsa bohlokwa theknolojing ya sejwalejwale ya konkreite. Ha e ntlafatse feela tshebetso ya konkreite empa hape e tshehetsa kaho e tala le ntshetsopele e tswelang pele. Ka kgatelopele e tswelang pele ya theknoloji, menyetla ya tshebediso ya metswako e fokotsang metsi e tla ba kgolo le ho feta.