I-HPMC (i-Hydroxypropyl Methyl Cellulose) iyimpahla ye-polymer evame ukusetshenziswa ezintweni zokwakha, ikakhulukazi ezintweni ezisekelwe kusimende kanye nezinto ezisekelwe ku-gypsum. Inokuncibilika kahle kwamanzi, ukunamathela, ukugcinwa kwamanzi kanye nezakhiwo eziqina, ngakho-ke isetshenziswa kabanzi odakeni, i-putty powder, i-tile adhesive nezinye izinto.
1. Izimbangela zokushwabana nokuqhekeka kwezinto zokwakha
Phakathi nenqubo yokuqina, izinto zokwakha zivame ukuncipha ngevolumu ngenxa yokuhwamuka kwamanzi, ukusabela kwamakhemikhali kanye nezinguquko ezicini zemvelo zangaphandle, okuholela ekugxilweni kokucindezeleka nokwakheka kokuqhekeka. Izinhlobo eziyinhloko zokuncipha zihlanganisa:
Ukushwabana kwePlastiki: Uma izinto ezisekelwe kusimende zingakaqini, umthamo uyancipha ngenxa yokuhwamuka okusheshayo kwamanzi.
Ukuncipha okomile: Ngemva kokuba impahla iqina, ivezwa emoyeni isikhathi eside, futhi amanzi ayahwamuka kancane, okuholela ekuncipheni kwevolumu.
Ukuncipha kwezinga lokushisa: Ukushintsha kwevolumu okubangelwa ukushintsha kwezinga lokushisa, ikakhulukazi endaweni enomehluko omkhulu wokushisa phakathi kwemini nobusuku.
I-Autogenous shrinkage: Ngesikhathi senqubo ye-cement hydration, umthamo wangaphakathi uyancipha ngenxa yokusetshenziswa kwamanzi ukusabela kwe-hydration.
Lokhu kuncipha kuvame ukuholela ekuqongeleleni kokucindezeleka ngaphakathi kwempahla, ekugcineni kubangele ama-microcracks noma imifantu, okuthinta ukuqina nobuhle besakhiwo sokwakha. Ukuze ugweme lesi simo, izithasiselo zivame ukudingeka ukuze kuthuthukiswe ukusebenza kwento, futhi i-HPMC ingenye yazo.
2. Indlela yokwenza ye-HPMC
I-HPMC idlala indima ebalulekile ekwehliseni ukushwabana nokuqhekeka kwezinto zokwakha, okufezwa kakhulu ngalezi zindlela ezilandelayo:
Ukugcinwa kwamanzi: I-HPMC inamandla okugcina amanzi aqinile futhi ingakha ifilimu yokugcina amanzi odakeni noma impushana ephutshayo ukuze ibambezele izinga lokuhwamuka kwamanzi. Njengoba ukuhwamuka okusheshayo kwamanzi ngaphakathi kwezinto kuzodala ukuncipha kwepulasitiki, umphumela wokugcina amanzi we-HPMC unganciphisa ngempumelelo ukwenzeka kwasekuqaleni kokuncipha, ugcine amanzi entweni eyanele, ngaleyo ndlela kukhuthaze ukusabela okugcwele kwe-hydration kasimende futhi kunciphise ukuqhekeka kokuncipha okubangelwa ukulahlekelwa kwamanzi phakathi nenqubo yokomisa. Ngaphezu kwalokho, i-HPMC ingathuthukisa ukusebenza kwempahla ngaphansi kwezimo ezimanzi nezomile futhi inciphise ukuqhekeka okubangelwa ukulahlekelwa kwamanzi.
Ukuqina nokuqina komphumela: I-HPMC iwugqinsi ongakhuphula ngempumelelo ukufana kanye ne-viscosity yodaka futhi ithuthukise ukunamathela kukonke kwento. Ngesikhathi senqubo yokwakha, uma impahla incane kakhulu, kulula ukuyiqeda noma ukugoqa, okuholela ekungalinganini kwendawo noma ngisho nokuqhekeka. Ngokusebenzisa i-HPMC, udaka lungagcina i-viscosity efanele, luthuthukise amandla nokuminyana kwendawo yezinto ngemva kokwakhiwa, futhi kunciphise amathuba okuqhekeka. Ngaphezu kwalokho, i-HPMC ingaphinda ithuthukise ukumelana kwe-shear kwezinto futhi ithuthukise ukumelana kwayo nokuqhekeka.
Thuthukisa ukuguquguquka kwezinto ezibonakalayo: Ama-molecule e-HPMC angadlala indima ethile ekuthuthukiseni ukuguquguquka kwezinto ezisekelwe kusimende noma izinto ezisekelwe ku-gypsum, ukuze okokusebenza kube nokumelana okungcono nokugoba ngemva kokwelashwa. Njengoba izinto zokwakha ngokuvamile zingaphansi kwengcindezi eqinile noma egobayo ngaphansi kwezinguquko nezinga lokushisa elizungezile kanye nemithwalo, ngemva kokwengeza i-HPMC, ukuguquguquka kwezinto ezibonakalayo kuyanda, okungabamba kangcono ukucindezeleka kwangaphandle futhi kugweme ukuqhekeka okuphukayo.
Lawula izinga lokuphendula usimende: Ezintweni ezisekelwe kusimende, isivinini sezinga lokusabela kwe-hydration sithinta ngokuqondile ukusebenza kwento. Uma ukusabela kwe-hydration kushesha kakhulu, ukucindezeleka okungaphakathi kwezinto akukwazi ukukhululwa ngesikhathi, okuholela ekuqhekekeni. I-HPMC ingakwazi ukwehlisa ngokufanelekile izinga lokusabela kwe-hydration ngokusebenzisa ukugcinwa kwayo kwamanzi kanye nokwakheka kwefilimu evikelayo, ivimbele usimende ekulahlekelweni kwamanzi ngokushesha kakhulu ekuqaleni, futhi ngaleyo ndlela igweme isenzakalo sokushwabana okuzenzakalelayo kanye nokuqhekeka phakathi nenqubo yokuqina kwento.
Thuthukisa ukusebenza komsebenzi wokwakha: I-HPMC ingathuthukisa ukusebenza kokwakhiwa kwezinto zokwakha, ikakhulukazi ebonakala ngokumanzi kwayo okuhle, ukugcinwa kwamanzi kanye nokuthambisa, ikhulise ukufana kwezinto, futhi inciphise imifantu ebangelwa ukwakhiwa okungafanele. Kungenza udaka, i-putty powder, njll. kube lula ukusabalala kanye nezinga ngesikhathi sokwakhiwa, ukunciphisa isilinganiso esingenalutho sezinto zokwakha, ukuthuthukisa ukuminyana okuphelele namandla ezinto ezibonakalayo, futhi kunciphise ingozi yokuqhekeka kwendawo okubangelwa ukwakhiwa okungalingani.
3. Ukusetshenziswa kwe-HPMC ezintweni zokwakha ezithile
I-adhesive yethayela: I-HPMC ingathuthukisa kakhulu ukusebenza kwe-anti-slip ye-adhesive tile, iqinisekise ukuthi amathayela angaxhunywa ngokulinganayo ku-substrate ngesikhathi sokufakwa, futhi inciphise ukuchithwa noma ukuqhekeka okubangelwa ukucindezeleka okungalingani noma ukuncipha. Ngaphezu kwalokho, imiphumela yokuqina nokugcinwa kwamanzi ye-HPMC iphinde inike amandla ukunamathela kwamathayili ukugcina isikhathi eside esivulekile ngemva kokwakhiwa, ukuthuthukisa ukusebenza kahle kokwakhiwa, nokunciphisa imifantu ebangelwa ukuphulukiswa okungalingani.
I-Putty powder: Ku-putty powder, indawo yokugcina amanzi ye-HPMC ingavimbela i-putty ekulahlekelweni kwamanzi ngokushesha ngesikhathi senqubo yokumisa, futhi inciphise ukuncipha nokuqhekeka okubangelwa ukulahlekelwa kwamanzi. Ngesikhathi esifanayo, umphumela wokuqina we-HPMC ungathuthukisa ukusebenza kokwakhiwa kwe-putty, okwenza kube lula ukusebenzisa ngokulinganayo odongeni, nokunciphisa ukuqhekeka kwendawo okubangelwa isicelo esingalingani.
Udaka: Ukwengeza i-HPMC odakeni kungathuthukisa ngempumelelo ukusebenza kwayo, kwenze udaka lube bushelelezi ngesikhathi sokwakha, kunciphise ukuhlukaniswa nokwahlukanisa, futhi ngaleyo ndlela kuthuthukise ukufana nokunamathela kodaka. Ngesikhathi esifanayo, umphumela wokugcina amanzi we-HPMC ungenza amanzi ahwamuke kancane kancane phakathi nenqubo yokuqina yodaka, ukugwema ukuncipha kanye nokuqhekeka okubangelwa ukulahleka kwamanzi ngaphambi kwesikhathi.
4. Izinyathelo zokuqapha zokusetshenziswa kwe-HPMC
Ukulawulwa komthamo: Inani le-HPMC elingeziwe linomthelela oqondile kumphumela wayo, futhi ngokuvamile lidinga ukulungiswa ngokuya ngesilinganiso sezinto ezibonakalayo kanye nezimo ezithile zohlelo lokusebenza. I-HPMC eyeqile izodala ukuthi impahla ibe nokungaguquguquki okuphezulu kakhulu, okuthinta ukusebenza kokwakhiwa; kuyilapho i-HPMC enganele ngeke ikwazi ukudlala indima yokugcina amanzi kanye nokuqina njengoba kufanele.
Sebenzisa nezinye izithasiselo: I-HPMC ivamise ukusetshenziswa ekuhlanganisweni nezinye izithasiselo zamakhemikhali (njengezinciphisi zamanzi, ama-ejenti afaka umoya, amapulasitiki, njll.) ukuze kuzuzwe imiphumela engcono. Uma usebenzisa, kuyadingeka ukucabangela ukusebenzisana kwezithasiselo ezahlukene ukuze kugwenywe ithonya elilinganayo ekusebenzeni kwezinto.
Njengesengezo esibalulekile sokwakha, i-HPMC inomphumela obalulekile ekwehliseni ukushwabana nokuqhekeka kwezinto zokwakha. Inciphisa ngokuphumelelayo imifantu ebangelwa ukulahlekelwa kwamanzi kanye nokugxilwa kokucindezeleka ngokuthuthukisa ukugcinwa kwamanzi, ukuqina, ukuguquguquka kwezinto ezibonakalayo kanye nokuthuthukisa izinga lokusabela kwe-cement hydration. Ukusetshenziswa okunengqondo kwe-HPMC akukwazi nje ukuthuthukisa ukusebenza kokwakhiwa kwempahla, kodwa futhi kwandise impilo yesevisi yesakhiwo sokwakha futhi kunciphise izindleko zokulungiswa kamuva. Ngokuthuthuka okuqhubekayo kobuchwepheshe bezinto zokwakha, ukusetshenziswa kwe-HPMC emkhakheni wokwakha kuzoba banzi futhi kujule.
Isikhathi sokuthumela: Sep-21-2024