I-Hydroxypropyl methylcellulose (HPMC)Ingabe ikhemikhali le-organic polymer elisetshenziswa kabanzi ezintweni zokwakha, ikakhulukazi ezitsheni, ukumboza, ukunamathela kweminye imikhiqizo. Umsebenzi oyinhloko wokuhlanganiswa kwe-HPMC ukuthuthukisa ukusebenza kosuku lodaka, uthuthukise ukugcinwa kwamanzi futhi unwebe isikhathi sokuvula. Njengoba ukufunwa kwezinto zokusebenza okuphezulu embonini yezokwakha kuyaqhubeka ukwanda, ukusetshenziswa kwe-HPMC sekuthole ukunakwa okubanzi.
1. Izici eziyisisekelo ze-HPMC
I-HPMC iyi-ether engenamanzi ye-cellulose ene-hydration enhle, ukunamathela kanye nezindawo zokuqina. Kungathuthukisa kakhulu ukugcinwa kwamanzi ngodaka, kunwebe isikhathi sokuvula, futhi kuthuthukise ukumelana kwe-sag nokusebenza kokwakha kodaka. Lezi zindawo ezinhle kakhulu zenza i-HPMC enye yama-admixtures ajwayelekile angodaka kanye nezinye izinto zokwakha.
2. Inqubo yokomisa yodaka
Inqubo yokomisa kasimende ivame ukufaka izingxenye ezimbili: ukuhwamuka kwamanzi kanye nosimende we-hydration reaction. UCement Hydration yindlela eyinhloko yodaka yokuphulukisa, kepha ukuhwamuka kwamanzi ngesikhathi somiswa nakho kudlala indima ebalulekile. Umswakama ososimende kasimende udinga ukususwa kancane kancane ngenqubo yokuhwamuka, futhi ijubane lale nqubo lithinta ngqo ikhwalithi, ukuqina kanye nokusebenza okwakhiwa okulandelayo komkhiqizo ophelile ngemuva kokwakhiwa komkhiqizo.
I-3. Umphumela we-HPMC ngejubane lokumisa ngodaka
Ithonya lokuhlanganiswa kweCincel®HPMC ngesivinini sokomisa ngodaka ngokukhethekile kuboniswa ezicini ezimbili: Ukugcinwa kwamanzi kanye nokulawulwa kwamanzi okuhwamuka.
(1) Ukugcinwa kwamanzi athuthukisiwe futhi kwanciphisa ijubane lokumisa
I-HPMC ine-hydration eqinile nezakhiwo zokugcina amanzi. Kungakha ifilimu ye-hydration olimini lokunciphisa ukuhwamuka ngokushesha kwamanzi. Ukugcinwa kwamanzi okungcono kodaka, okuhamba kancane kumile ngoba amanzi agcinwe kudaka isikhathi eside. Ngakho-ke, ngemuva kokungeza i-HPMC, inqubo yokuhwamuka kwamanzi odongeni izovinjelwa ngezinga elithile, okuholela ngesikhathi sokusoma isikhathi eside.
Yize kuncipha ukuhwamuka kwamanzi kungandisa isikhathi sodaka, le nqubo eyomisa kancane inenzuzo, ikakhulukazi ngesikhathi sokwakha, ngoba ingavikela ngempumelelo izinkinga ezinjenge-worder eyomile futhi iqinisekisa ikhwalithi yokwakha.
(2) Ukulungiswa kwenqubo yokuzikhethela kosimende
Iqhaza le-HPMC ku-Cement Data alikhawulelwe ekuthuthukiseni ukugcinwa kwamanzi. Ingalawula futhi inqubo ye-hydration ka usimende. Ngokushintsha i-Rheology of udaka, i-HPMC ingathinta izinga lokuxhumana phakathi kwezinhlayiya zokwenza usimende nomswakama, ngaleyo ndlela kuthinte izinga le-hydrate likasimende. Kwezinye izimo, ukungezwa kweCefitCel®HPMC kungabambezela kancane inqubo ye-hydration ye-CEAND, okwenza udaka luluphele kancane. Lo mphumela uvame ukutholakala ngokulungisa ukusatshalaliswa kosayizi wensimbi kanye nokuxhumana kwezinhlayiya zosekhukhwini, ngaleyo ndlela kuthinte ijubane lokusoma.
(3) Ukuguquguquka komswakama wezemvelo
I-HPMC ingathuthukisa ukumelana nokuhwamuka kodaka, okwenza udaka luvumelane nezimo kumswakama wezemvelo. Emvelweni eyomile, umphumela wokugcinwa kwamanzi we-HPMC ubaluleke kakhulu. Kungabambezela ngempumelelo ukulahleka komswakama wasemhlaba futhi kunciphise ukuqhekeka komhlaba okubangelwa isivinini sokomiswa ngokweqile. Lokhu kubaluleke kakhulu ezindaweni ezishisayo noma ezomile. Ngakho-ke, i-HPMC ayigcini nje ngokuguqula izinga lokuhwamuka kwamanzi, kepha futhi ithuthukisa ukuvumelana nezimo zodaka endaweni yangaphandle, idlulisela isikhathi esingaqondile.
4. Izici ezithinta isivinini sokomiswa
Ngaphezu kwalokho okungeziwe kokuhlanganiswa kwe-HPMC, ijubane lokusoma lodaka liyathinteka nezinye izinto eziningi, kufaka phakathi:
Isilinganiso sesibhamu
Izimo zemvelo: izinga lokushisa, umswakama kanye nezimo zokusakazwa komoya zibalulekile ezintweni ezithinta ijubane lokusoma lodaka. Emvelweni wokushisa okuphezulu kanye nomswakama ophansi, amanzi avele ngokushesha, futhi okuphambene nalokho.
Ubukhulu bodaka: Ubukhulu bodaka buthinta ngqo inqubo yalo yokomisa. Ama-Sweers ama-Screed avame ukuthatha isikhathi eside ukuze ayomisa ngokuphelele.
5. Ukucatshangelwa kohlelo lokusebenza olusebenzayo
Kuzinhlelo zokusebenza ezisebenzayo, onjiniyela bokwakha kanye nabasebenzi bokwakha bavame ukudinga ukulinganisa ijubane lokusoma lodaka ngodaka ngokusebenza kokwakhiwa. Njengomuntu ophikisayo, i-HPMC ingabambezela ijubane lokomisa, kepha lesi sici sinenzuzo enkulu ezindaweni lapho isikhathi sokwakha kudinga ukugcinwa khona. Isibonelo, ezindaweni zokushisa eziphezulu, izindawo zokusoma zomoya, i-HPMC ingavimbela ngempumelelo ukoma komhlaba kanye nokuqhekeka, ukuqinisekisa ukusebenza okungcono kanye nesikhathi esijana sodaka ngesikhathi sokwakha.
Kodwa-ke, kwamanye amacala athile, njengamaphrojekthi adinga ukumiswa okusheshayo kodaka, kungahle kudingeke ukulawula inani leI-HPMCKungezwe noma khetha ifomula elingenawo i-HPMC ukusheshisa inqubo yokumisa.
Njengomuntu ophikisayo kambango, i-Compicket® HPMC ingathuthukisa ngempumelelo ukugcinwa kwamanzi ngodaka, yandise isikhathi sokuvula, futhi ithinta ngokungaqondile ijubane lokusoma lodaka. Ngemuva kokungeza i-HPMC, ijubane lokusoma likadaka livame ukuncipha, okunomthelela omuhle ekugwemeni izinkinga ezinjengokuqhekeka okomile ngesikhathi sokwakha. Kodwa-ke, izinguquko esivinini sokomiswa nazo ziyathinteka ezintweni ezahlukahlukene ezifana nezilinganiso zodaka kanye nezimo zemvelo. Ngakho-ke, kuzinhlelo zokusebenza ezisebenzayo, inani le-HPMC kumele likhethwe ngokufanele ngokwemibandela ethile yokuthola umphumela omuhle kakhulu wokwakha.
Isikhathi sePosi: Jan-10-2025