Ukhonkolo ozihlanganisayo (SCC) wuhlobo lukakhonkolo olugeleza kalula futhi luzinze ku-formwork ngaphandle kokudlidliza komshini. I-SCC iya ngokuya iduma embonini yezokwakha ngenxa yekhono layo lokuthuthukisa ukusebenza kahle kanye nekhwalithi yamaphrojekthi wokwakha. Ukuze kuzuzwe lokhu kugeleza okuphezulu, ama-admixtures afana ne-high-performance-reduction admixtures yengezwe kumxube wekhonkrithi. Kulapho i-hydroxypropyl methylcellulose (HPMC) ingena khona njengengxube ebalulekile.
I-Hydroxypropylmethylcellulose iyi-polymer evame ukusetshenziswa njengesithasiselo ukuthuthukisa izakhiwo ze-rheological ze-SCC. Isebenza njenge-lubricant futhi isiza ukunciphisa ukungqubuzana phakathi kwezinhlayiya zikakhonkolo, ngaleyo ndlela ithuthukise ukugeleza kwayo. Izakhiwo eziyingqayizivele ze-HPMC ziyenza ithuthukise ukuzinza kanye nokufana kwe-SCC kuyilapho futhi yehlisa ukuhlukaniswa nokopha.
Amanzi okunciphisa umthamo
Omunye wemisebenzi eyinhloko ye-HPMC ku-SCC amandla ayo okunciphisa amanzi. I-HPMC yaziwa ngokuba nezindawo ezinhle kakhulu zokugcina amanzi, esiza ukwehlisa okuqukethwe kwamanzi kungxube. Umphumela uba ingxube eminyene ekwazi ukumelana nokuncipha nokuqhekeka. Ngaphezu kokunciphisa umswakama, i-HPMC isiza futhi ukukhulisa amandla e-SCC phakathi nesigaba esiluhlaza futhi ithuthukise ukugeleza kwamanzi ngesikhathi sesigaba sokuphulukisa, ngaleyo ndlela yehlise ukulahlekelwa amandla.
Thuthukisa i-liquidity
I-HPMC iyinhlanganisela eyinhloko ku-SCC futhi ingathuthukisa kakhulu uketshezi. Izingxube ezisebenza kahle ezinciphisa amanzi njenge-HPMC zisiza ekuhlakazeni izinhlayiya zikasimende ngokulinganayo, okuchaza ukuthuthuka okuphawulekayo kokusebenza kwe-SCC. Kunciphisa ukungqubuzana phakathi kwezinhlayiya, kuzivumela ukuba zihambe ngokukhululekile ngokusebenzisa ingxube, ngaleyo ndlela zithuthukise ukugeleza. Ukukhula kokuhamba kwe-SCC kunciphisa umsebenzi, isikhathi kanye nempahla yokusebenza edingekayo ukuze kuthelwe ukhonkolo, okuholela ekuphothulweni kwephrojekthi ngokushesha.
Yehlisa ukuhlukana nokopha
Ukuhlukaniswa kanye nokopha yizinkinga ezimbili ezivamile lapho ukhonkolo uthuthwa futhi ubekwe eduze kwe-rebar. I-SCC inenani eliphansi likasimende wamanzi kanye nokuqukethwe kwenhlawulo ephakeme kunokhonkolo ovamile, okwandisa nakakhulu amathuba alezi zinkinga. I-HPMC inciphisa ingozi yalezi zinkinga ngokuqinisekisa ukuthi izinhlayiya zihlala zifana futhi zisakazwa ngokulinganayo. Lokhu kufezwa ngokwakha isendlalelo se-adsorbent lapho i-HPMC ikhangisa khona phezu kwezinhlayiya zikasimende, inikeze isibopho esiqine ngokwanele ukukhawulela ukuxhumana phakathi kwezinhlayiya zikasimende, ngaleyo ndlela kwandiswe ukuzinza nokunciphisa ukopha.
Thuthukisa ukubumbana
Ukubumbana yikhono lezinto zokwakha ukunamathelana. I-HPMC ibonise izakhiwo ezinhle kakhulu zokunamathisela, okuyenza ilungele ukusetshenziswa ku-SCC. Izakhiwo zokunamathisela ngokuyinhloko zibangelwa amaqembu e-hydroxyl kuma-molecule e-HPMC, avumela ukuhlangana okuqinile phakathi kwezinhlayiya zikasimende, ngaleyo ndlela kuthuthukiswe ukuhlangana kwengxube. Ukuhlangana okuthuthukisiwe kuvimbela ukuxubana ekuqhekekeni, okuholela ekwakhekeni kokhonkolo okuhlala isikhathi eside, okuqinile.
Ekuphetheni
I-HPMC iyinhlanganisela ebalulekile kukhonkolo ozihlanganisayo. Ikhono layo lokunciphisa okuqukethwe kwamanzi enhlanganisela, ukuthuthukisa ukugeleza, ukunciphisa ukuhlukaniswa nokopha, nokuthuthukisa ukuhlangana kwenza kube ingxenye ebalulekile ye-SCC. I-SCC inezinzuzo eziningi kunokhonkolo wendabuko, futhi ukusetshenziswa kwe-HPMC kusiza ukuthuthukisa lezi zinzuzo. Uma kuqhathaniswa nokhonkolo wendabuko, amaphrojekthi asebenzisa i-SCC angaqedwa ngokushesha, ngezindleko eziphansi, futhi adinga ukulungiswa nokulungiswa okuncane ngenxa yokwanda kwamandla esakhiwo. Ukusetshenziswa kwe-HPMC ku-SCC akunawo umthelela omubi endaweni ezungezile noma kubantu abasebenzisa okokusebenza. Iphephile ngo-100% futhi ayinabo ubuthi, okwenza ilungele amaphrojekthi wokwakha.
Isikhathi sokuthumela: Sep-18-2023