Self-compacting concrete (SCC) ke mofuta oa konkreite e phallang habonolo mme e lula ka har'a sebopeho ntle le ho sisinyeha ha mochini. SCC e ntse e tsebahala haholo indastering ea kaho ka bokhoni ba eona ba ho ntlafatsa ts'ebetso le boleng ba merero ea kaho. Ho finyella phallo ena e phahameng, li-admixtures tse kang li-admixtures tse fokotsang metsi tse sebetsang hantle li kenngoa motsoako oa konkreite. Mona ke moo hydroxypropyl methylcellulose (HPMC) e kenang e le motsoako oa bohlokoa.
Hydroxypropylmethylcellulose ke polymer e atisang ho sebelisoa e le tlatsetso ho ntlafatsa thepa ea rheological ea SCC. Ha e le hantle e sebetsa joalo ka setlolo 'me e thusa ho fokotsa khohlano lipakeng tsa likaroloana tsa konkreite, ka hona e ntlafatsa mokelikeli oa eona. Thepa e ikhethang ea HPMC e e nolofalletsa ho ntlafatsa botsitso le homogeneity ea SCC ha e ntse e fokotsa karohano le ho tsoa mali.
Matla a ho fokotsa metsi
E 'ngoe ea mesebetsi ea mantlha ea HPMC ho SCC ke bokhoni ba eona ba ho fokotsa metsi. HPMC e tsejoa e na le thepa e babatsehang ea ho boloka metsi, e thusang ho fokotsa metsi a motsoako. Phello ke motsoako o teteaneng o hanyetsanang le ho honyela le ho peperana. Ntle le ho fokotsa mongobo, HPMC e boetse e thusa ho eketsa matla a SCC nakong ea mokhahlelo o motala le ho ntlafatsa hydration nakong ea ho folisa, kahoo e fokotsa tahlehelo ea matla.
Ntlafatsa boleng ba chelete
HPMC ke motsoako oa bohlokoa ho SCC mme e ka ntlafatsa metsi haholo. Li-admixtures tse fokotsang metsi tse sebetsang hantle tse kang HPMC li thusa ho hasanya likaroloana tsa samente ka ho lekana, e leng se hlalosang ntlafatso e kholo mosebetsing oa SCC. E fokotsa likhohlano pakeng tsa likaroloana, e ba lumella ho tsamaea ka bolokolohi ka har'a motsoako, kahoo ba ntlafatsa phallo. Ho eketseha ha motsamao oa SCC ho fokotsa mosebetsi, nako le thepa e hlokahalang ho tšela konkreite, e leng se bakang ho phethoa ka potlako ha morero.
Fokotsa karohano le ho tsoa mali
Ho arohana le ho tsoa mali ke mathata a mabeli a tloaelehileng ha konkreite e tsamaisoa 'me e behoa ho pota-pota rebar. SCC e na le karo-karolelano e tlase ea samente ea metsi le litefiso tse phahameng tsa likotlo ho feta konkreite e tloaelehileng, e leng ho eketsang menyetla ea mathata ana. HPMC e fokotsa kotsi ea mathata ana ka ho etsa bonnete ba hore likaroloana li lula li tšoana le ho ajoa ka tsela e lekanang. Sena se finyelloa ka ho etsa lera adsorbent eo HPMC adsorbs holim'a likaroloana tsa samente, ho fana ka tlamo e matla ka ho lekaneng ho fokotsa ho kopana pakeng tsa likaroloana tsa samente, kahoo ho eketsa botsitso le ho fokotsa mali.
Ntlafatsa momahano
Momahano ke bokhoni ba lisebelisoa ho khomarelana. HPMC e bonts'itse thepa e ntle ea sekhomaretsi, e etsa hore e be e loketseng ho sebelisoa ho SCC. Thepa ea sekhomaretsi e amahanngoa haholo le lihlopha tsa hydroxyl ka har'a limolek'hule tsa HPMC, tse etsang hore ho be le maqhama a matla pakeng tsa likaroloana tsa samente, kahoo ho ntlafatsa bonngoe ba motsoako. Khokahano e ntlafetseng e thibela motsoako ho senya, e leng se etsang hore ho be le mohaho o tsitsitseng haholoanyane, o matla haholoanyane oa konkreite.
ha re phethela
HPMC ke motsoako oa bohlokoa ho konkreite e iketsetsang. Bokhoni ba eona ba ho fokotsa metsi ka har'a motsoako, ho ntlafatsa phallo, ho fokotsa karohano le ho tsoa mali, le ho ntlafatsa momahano ho etsa hore e be karolo ea bohlokoa ea SCC. SCC e na le melemo e mengata ho feta konkreite ea setso, mme ts'ebeliso ea HPMC e thusa ho ntlafatsa melemo ena. Ha ho bapisoa le konkreite ea setso, merero e sebelisang SCC e ka phethoa ka potlako, ka theko e tlaase, 'me e hloka tlhokomelo e fokolang le ho lokisoa ka lebaka la ho eketseha ha matla a mohaho. Tšebeliso ea HPMC ho SCC ha e na phello e mpe tikolohong kapa bathong ba sebelisang thepa. E bolokehile ka 100% ebile ha e na chefo, e etsa hore e be e loketseng merero ea kaho.
Nako ea poso: Sep-18-2023