Mefuta ea li-retarders ke efe?

Li-retarders ke li-additives tsa lik'hemik'hale tse liehisang ho behoa kapa ho thatafala ha samente. Li sebelisoa lits'ebetsong tsa konkreite moo sebaka se liehang se lakatsehang, joalo ka ha ho chesa, kapa ha ho hlokahala nako e telele ea ho kopanya kapa ho beha. Ho na le mefuta e mengata ea li-retarders tse fumanehang, e 'ngoe le e' ngoe e na le thepa ea eona le melemo ea eona. Mona ke mefuta e meng ea li-retarders:

1. Organic Acids: Li-organic acid tse kang citric, tartaric le gluconic acid hangata li sebelisoa e le li-retarders linthong tse entsoeng ka samente. Ba sebetsa ka ho itšoara ka lime e sa lefelloeng ka samenteng, e leng ho fokotsang ts'ebetso ea metsi. Li-retarders tsa asiti ea tlhaho hangata ha li chefo ebile lia senyeha, 'me li etsa khetho e ntle ho tikoloho.
2. Tsoekere: Tsoekere e kang glucose, sucrose le fructose le eona e ka sebelisoa e le lintho tse thibelang lintho tse entsoeng ka samente. Ba sebetsa ka ho tlama ka holim'a likaroloana tsa samente, e leng se fokotsang ts'ebetso ea hydration. Hangata li-retarders tsa tsoekere li sebelisoa hammoho le li-retarders tse ling ho fana ka nako e laoloang haholoanyane.
3. Matsoai a Inorganic: Matsoai a sa tloaelehang a kang borax, zinc sulfate le sodium silicate a atisa ho sebelisoa e le li-retarders linthong tse entsoeng ka samente. Ba sebetsa ka ho etsa filimi e tšesaane holim'a likaroloana tsa samente, e leng se fokotsang mokhoa oa ho phalla. Li-retarders tsa letsoai tse sa sebetseng hangata li sebelisoa hammoho le asiti ea organic kapa li-sugar retarders ho fana ka nako e tsitsitseng le e lebelletsoeng esale pele.
4. Lignosulfonates: Lignosulfonates ke li-polymer tsa tlhaho tse nkiloeng ho makhasi a lehong. Hangata li sebelisoa e le li-retarders ka thepa e entsoeng ka samente, ha li ntse li sebetsa ka ho tlama ka holim'a likaroloana tsa samente le ho fokotsa ts'ebetso ea hydration. Lignosulfonate retarders hangata li sebetsa hantle ka samenteng ea aluminium e phahameng ho feta samenteng e tloaelehileng ea Portland.
5. Hydroxycarboxylic Acids: Hydroxycarboxylic acids tse kang gluconic le citric acid hangata li sebelisoa e le li-retarders linthong tse entsoeng ka samente. Ba sebetsa ka ho chelate li-ion tsa mahala tsa calcium ka samenteng, e leng ho liehisang tšebetso ea metsi. Li-retarders tsa Hydroxycarboxylic acid hangata li sebelisoa hammoho le li-retarder tse ling ho fana ka nako e tsitsitseng le e ka lebelloang esale pele.
6. Polycarboxylate Ether (PCE) Superplasticizers: Li-superplasticizers tsa PCE li atisa ho sebelisoa e le li-retarders lits'ebetsong tsa konkreiti moo ho liehang ho beha nako ho lakatsehang. Ba sebetsa ka ho qhala likaroloana tsa samente le ho fokotsa tsitsipano ea metsi holim'a metsi, e leng se liehisang ts'ebetso ea hydration. Li-retarders tsa PCE li atisa ho sebelisoa hammoho le li-superplasticizers tse ling ho fana ka nako e tsitsitseng le e ka tsejoang esale pele.

Qetellong, li-retarders ke karolo ea bohlokoa ea thepa e entsoeng ka samente, kaha e fana ka nako e laoloang haholoanyane 'me e ka thusa ho ntlafatsa ts'ebetso ea thepa. Mofuta oa retarder o sebelisitsoeng o tla itšetleha ka kopo e khethehileng le nako e lakatsehang ea ho beha, hammoho le thepa ea samente le lisebelisoa tse ling tse sebelisoang. Ka ho khetha mofuta o nepahetseng oa retarder, bo-rakonteraka le baenjiniere ba ka etsa bonnete ba hore thepa ea bona e thehiloeng ho samente e matla, e tšoarella, 'me e sebetsa hantle ha nako e ntse e ea.