I-HPMC (i-hydroxypropyl methylcellulose)yikhompawundi yepolymer esetyenziswa kakhulu kwiimveliso zesamente. Inokuqina okugqwesileyo, ukusabalalisa, ukugcinwa kwamanzi kunye neempawu zokubambelela, ngoko kunokuphucula kakhulu ukusebenza kweemveliso zesamente. Kwimveliso kunye nenkqubo yokusetyenziswa kweemveliso zesamente, zihlala zijongene neengxaki ezifana nokuphucula umbane, ukuqinisa ukuxhathisa ukuqhekeka, kunye nokuphucula amandla. Ukongezwa kwe-HPMC kunokusombulula ngempumelelo ezi ngxaki.
1. Ukuphucula ubumanzi kunye nokusebenza kodaka lwesamente
Kwinkqubo yokuveliswa kweemveliso zesamente, u-fluidity yinto ebalulekileyo echaphazela imisebenzi yokwakha kunye nomgangatho wemveliso. Njenge-polymer thickener, i-HPMC inokwenza isiseko senethiwekhi ye-colloidal kwi-slurry ye-samente, ngaloo ndlela iphucula ngokufanelekileyo umbane kunye nokusebenza kwe-slurry. Inokunciphisa kakhulu umahluko we-viscosity ye-sement slurry, yenza i-slurry ibe yiplastiki ngakumbi kwaye ilungele ukwakhiwa kunye nokugalela. Ukongezelela, i-HPMC inokugcina ukufana kwe-sement slurry, ukukhusela i-cement slurry ukuba ihlukane ngexesha lokuxuba, kunye nokuphucula ukusebenza ngexesha lokwakha.
2. Ukwandisa ukugcinwa kwamanzi kwiimveliso zesamente
Inkqubo ye-hydration ye-samente iyisitshixo ekubunjweni kwamandla emveliso yesamente. Nangona kunjalo, ukuba amanzi akwi-sement slurry aphuphuma okanye alahleke ngokukhawuleza, ukusabela kwe-hydration kunokungaphelelanga, ngaloo ndlela kuchaphazela amandla kunye nokubumbana kweemveliso zesamente. I-HPMC inokugcinwa kwamanzi okuqinileyo, okunokuthi ukufunxa ngokufanelekileyo amanzi, ukulibazisa ukuguquka kwamanzi, kunye nokugcina ukufuma kwe-samente slurry kwinqanaba elizinzileyo, ngaloo ndlela kube negalelo ekugqithiseni ngokupheleleyo kwesamente, ngaloo ndlela kuphuculwe amandla kunye namandla iimveliso zesamente. Ukuxinana.
3. Ukuphucula ukuxhathisa kokuqhekeka kunye nokuqina kweemveliso zesamente
Iimveliso zesamente zixhomekeke ekuqhekekeni ngexesha lenkqubo yokuqina, ngokukodwa ukuchithwa kwe-shrinkage okubangelwa ukulahlekelwa ngokukhawuleza komswakama ngexesha lokumisa. Ukongezwa kwe-HPMC kunokuphucula ukuxhathisa kokuqhekeka kweemveliso zesamente ngokunyusa i-viscoelasticity ye-slurry. Isakhiwo se-molecular ye-HPMC sinokwenza i-network structure kwi-samente, enceda ukusabalalisa uxinzelelo lwangaphakathi kunye nokunciphisa uxinzelelo loxinzelelo lwe-shrinkage ngexesha lokuqina kwesamente, ngaloo ndlela kunciphisa ngokufanelekileyo ukuvela kweentanda. Ukongeza, i-HPMC inokuphucula ukuqina kweemveliso zesamente, izenze zibe lula ukuqhekeka phantsi kweemeko ezomileyo okanye zobushushu obuphantsi.
4. Ukuphucula ukunganyangeki kwamanzi kunye nokuqina kweemveliso zesamente
Ukuqina kunye nokuchasana kwamanzi kweemveliso zesamente zihambelana ngokuthe ngqo nokusebenza kwazo kwiindawo ezinzima. I-HPMC inokwenza ifilimu ezinzileyo kwi-slurry yesamente ukunciphisa ukungena kokufuma kunye nezinye izinto eziyingozi. Kwakhona kunokuphucula ukuxhathisa kwamanzi kwiimveliso zesamente ngokuphucula ukuxinana kwesamente kunye nokuphucula ukuxhathisa kweemveliso zesamente kumswakama. Ngethuba lokusetyenziswa kwexesha elide, iimveliso zesamente zizinzile ngakumbi kumswakama ophezulu okanye kwiindawo eziphantsi kwamanzi, azikwazi ukuchithwa kunye nokukhukuliseka, kunye nokwandisa ubomi babo benkonzo.
5. Ukuphucula amandla kunye nesantya sokuqina kweemveliso zesamente
Ngexesha lenkqubo yokusabela kwe-hydration yeemveliso zesamente, ukongezwa kwe-HPMC kunokukhuthaza ukusasazwa kwamasuntswana e-samente kwi-slurry ye-samente kunye nokwandisa indawo yoqhagamshelwano phakathi kwamasuntswana e-samente, ngaloo ndlela kwandisa izinga le-hydration kunye nesantya sokukhula kwamandla e-samente. Ukongeza, i-HPMC inokwandisa ukusebenza kakuhle kwesamente kunye namanzi, iphucule ukukhula kwamandla kwangoko, yenze inkqubo yokuqina kweemveliso zesamente ifane ngakumbi, kwaye ngaloo ndlela iphucule amandla okugqibela. Kwezinye izicelo ezikhethekileyo, i-HPMC ingaphinda ilungelelanise umlinganiselo we-hydration yesamente ukulungelelanisa neemfuno zokwakha kwiindawo ezahlukeneyo.
6. Ukuphucula inkangeleko kunye nomgangatho womphezulu weemveliso zesamente
Umgangatho wembonakalo yeemveliso zesamente ubalulekile kwisiphumo sokugqibela sokusetyenziswa, ngakumbi kulwakhiwo oluphezulu kunye neemveliso zokuhombisa, apho ukucaba kunye nokugudiswa kwembonakalo yenye yezinto eziphambili zokulinganisa umgangatho. Ngokulungelelanisa i-viscosity kunye neempawu ze-rheological ze-sement slurry, i-HPMC inokunciphisa ngokufanelekileyo iingxaki ezifana namaqamza, iziphene, kunye nokusabalalisa okungalinganiyo, ngaloo ndlela yenza umphezulu weemveliso zesamente zibe lula kwaye ziphucule, kwaye ziphucule umgangatho wenkangeleko. Kwezinye iimveliso zesamente zokuhombisa, ukusetyenziswa kwe-HPMC kunokuphucula ukufana kunye nokuzinza kombala wabo, ukunika iimveliso zibonakala zibuthathaka.
7. Ukuphucula ukumelana neqabaka kwiimveliso zesamente
Iimveliso zesamente ezisetyenziswa kwiindawo ezinobushushu obuphantsi kufuneka zibe neqondo elithile lokumelana neqabaka ukuthintela iintanda kunye nomonakalo obangelwa yimijikelo yokunyibilika komkhenkce. I-HPMC inokuphucula ukuxhathisa kweqabaka kwiimveliso zesamente ngokwandisa uzinzo lwesakhiwo sodaka lwesamente. Ngokuphucula ukubumbana kweemveliso zesamente kunye nokunciphisa isiqulatho sokufuma kwimibhobho yesamente, iHPMC iphucula ukuxhathisa kweqabaka yeemveliso zesamente phantsi kweemeko zobushushu obuphantsi kwaye inqanda umonakalo owenziwe kukwandiswa kwesamente ngenxa yokukhenkceza kwamanzi.
Ukusetyenziswa kweHPMCkwimveliso yesamente inoluhlu olubanzi lweenzuzo kwaye inokuphucula kakhulu ukusebenza kweemveliso zesamente ngeendlela ezahlukeneyo. Ayinakuphucula kuphela ubumanzi, ukugcinwa kwamanzi, ukumelana nokuqhekeka kunye namandla eemveliso zesamente, kodwa nokuphucula umgangatho womphezulu, ukuqina kunye nokumelana neqabaka yeemveliso zesamente. Njengoko ishishini lokwakha liqhubeka nokuphucula iimfuno zokusebenza kweemveliso zesamente, i-HPMC iya kusetyenziswa ngokubanzi nangaphezulu ukubonelela ngenkxaso yokusebenza ezinzileyo kunye nesebenzayo kwimveliso kunye nokusetyenziswa kweemveliso zesamente.
Ixesha lokuposa: Dec-06-2024