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.
IHydroxypropylmethylcellulose iyi-polymer evame ukusetshenziswa njengesithasiselo ukuze kuthuthukiswe 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. Ukuhamba okukhulayo kwe-SCC kunciphisa umsebenzi, isikhathi kanye nempahla 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