IHydroxypropyl methylcellulose (HPMC)yipolima enyibilikayo emanzini edla ngokusetyenziswa kwizinto zokwakha. Isetyenziswa ngokubanzi kudaka lwesamente, iputty powder, i-adhesive tile kunye nezinye iimveliso. I-HPMC ikakhulu iphucula umgangatho wezinto ezisekelwe kwisamente ngokunyusa i-viscosity yenkqubo, ukuphucula umthamo wokugcinwa kwamanzi kunye nokulungelelanisa ukusebenza kolwakhiwo.
1. Impembelelo ye-HPMC ekugcineni amanzi odaka lwesamente
Ugcino lwamanzi lodaka lwesamente lubhekiselele kubuchule bodaka ukugcina amanzi phambi kokuba luqine ngokupheleleyo. Ukugcinwa kakuhle kwamanzi kunceda ukugcwala okupheleleyo kwesamente kwaye kuthintele ukuqhekeka kunye nokulahleka kwamandla okubangelwa ukulahleka kwamanzi amaninzi. I-HPMC iphucula ukugcinwa kwamanzi kudaka lwesamente ngezi ndlela zilandelayo:
Ukwandisa i-viscosity yenkqubo
Emva kokuba i-HPMC inyibilika kwi-cement mortar, yenza isakhiwo esifanayo se-mesh, ikhulise i-viscosity yodaka, isasaze ngokulinganayo amanzi ngaphakathi kodaka kunye nokunciphisa ilahleko yamanzi asimahla, ngaloo ndlela iphucula ukugcinwa kwamanzi. Olu phawu lubaluleke kakhulu kulwakhiwo lobushushu obuphezulu ehlotyeni okanye kumaleko asisiseko anokufunxwa ngamandla kwamanzi.
Ukwenza umqobo wokufuma
Iimolekyuli ze-HPMC zinokufunxa okuqinileyo kwamanzi, kwaye isisombululo saso sinokwenza ifilimu ye-hydration ejikeleze amasuntswana esamente, edlala indima ekutywineni amanzi kunye nokucothisa isantya sokunyuka kwamanzi kunye nokufunxa. Le filimu yamanzi inokugcina ibhalansi yamanzi ngaphakathi kodaka, ivumela ukusabela kwe-sement hydration ukuba kuqhubeke kakuhle.
Nciphisa ukopha
I-HPMC inokunciphisa ngokufanelekileyo ukopha kodaka, oko kukuthi, ingxaki yokuphuma kwamanzi kudaka kunye nokudada emva kokuba udaka luxutywe. Ngokwandisa i-viscosity kunye noxinzelelo lwe-surface yesisombululo se-aqueous, i-HPMC inokuthintela ukufuduka kwamanzi axutywayo kwi-mortar, iqinisekise ukuhanjiswa okufanayo kwamanzi ngexesha lenkqubo ye-cement hydration, kwaye ngaloo ndlela ikhulise ukulingana okupheleleyo kunye nokuzinza kodaka.
2. Impembelelo ye-HPMC ekubunjweni kodaka lwesamente
Indima ye-HPMC kudaka lwesamente ayiphelelanga ekugcinweni kwamanzi, kodwa ikwachaphazela ukubunjwa kwayo kunye nokusebenza kwayo, njengoko kuboniswe ngezantsi:
Ukuchaphazela inkqubo ye-cement hydration
Ukongezwa kwe-HPMC kuya kuthothisa isantya se-hydration ye-cement hydration kwisigaba sokuqala, okwenza inkqubo yokwakheka kweemveliso ze-hydration ifanayo, ehambelana nokuxinana kwesakhiwo sodaka. Esi siphumo sokulibazisa sinokunciphisa ukuqhekeka kwangoko kunye nokuphucula ukuxhathisa kokuqhekeka kodaka.
Ukulungelelanisa iimpawu ze-rheological zodaka
Emva kokunyibilika, i-HPMC inokunyusa iplastiki kunye nokusebenza kodaka, iyenze ibe lula ngexesha lokufaka isicelo okanye ibekwe, kwaye iyancipha ukopha kunye nokwahlula. Ngelo xesha, i-HPMC inokunika udaka i-thixotropy ethile, ukwenzela ukuba igcine i-viscosity ephezulu xa imile, kwaye i-fluidity iphuculwe phantsi kwesenzo se-shear force, eluncedo kwimisebenzi yokwakha.
Ukuphembelela uphuhliso lwamandla odaka
Ngelixa i-HPMC iphucula ukusebenza kokwakhiwa kodaka, inokuba nefuthe elithile kumandla ayo okugqibela. Ekubeni i-HPMC iya kwenza ifilimu kudaka lwesamente, inokulibazisa ukubunjwa kweemveliso ze-hydration kwixesha elifutshane, kubangela ukuba amandla okuqala ehle. Nangona kunjalo, njengoko i-cement hydration iqhubeka, umswakama ogcinwe yi-HPMC unokukhuthaza ukuphendulwa kwe-hydration kamva, ukwenzela ukuba amandla okugqibela aphuculwe.
Njengesongezo esibalulekileyo sodaka lwesamente,HPMCinokuphucula ngokufanelekileyo ukugcinwa kwamanzi kwidaka, ukunciphisa ukulahleka kwamanzi, ukuphucula ukusebenza kokwakhiwa, kunye nokuchaphazela inkqubo ye-cement hydration ukuya kwinqanaba elithile. Ngokulungelelanisa i-dosage ye-HPMC, ibhalansi engcono phakathi kokugcinwa kwamanzi, ukusebenza kunye namandla kunokufunyanwa ukuhlangabezana neemfuno zeemeko ezahlukeneyo zesicelo. Kwiiprojekthi zokwakha, usetyenziso olunengqiqo lwe-HPMC lubaluleke kakhulu ekuphuculeni umgangatho wodaka kunye nokwandisa ukuqina.
Ixesha lokuposa: Mar-25-2025