I-HPMC (i-hydroxypropyl methylcellulose)ludibaniso lwesakhiwo olusetyenziswa kakhulu kwaye lusetyenziswa kakhulu kwi-gypsum mortar. Imisebenzi yalo ephambili kukuphucula ukusebenza kolwakhiwo lwe-mortar, ukuphucula ukugcinwa kwamanzi, ukuphucula ukunamathela kunye nokulungisa iipropati ze-rheological ze-mortar. I-Gypsum mortar sisixhobo sokwakha esine-gypsum njengeyona nto iphambili, esetyenziswa rhoqo kulwakhiwo lodonga nophahla.
1. Impembelelo yedosi ye-HPMC ekugcinweni kwamanzi kwi-gypsum mortar
Ukugcinwa kwamanzi yenye yeempawu ezibalulekileyo ze-gypsum mortar, enxulumene ngokuthe ngqo nokusebenza kolwakhiwo kunye namandla okubopha kwe-mortar. I-HPMC, njenge-polymer ephezulu yeemolekyuli, inokugcinwa kakuhle kwamanzi. Iimolekyuli zayo ziqulathe inani elikhulu lamaqela e-hydroxyl kunye ne-ether. La maqela e-hydrophilic anokwenza iibhondi ze-hydrogen kunye neemolekyuli zamanzi ukunciphisa ukuguquguquka kwamanzi. Ke ngoko, ukongezwa kwesixa esifanelekileyo se-HPMC kunokuphucula ngempumelelo ukugcinwa kwamanzi kwe-mortar kwaye kuthintele i-mortar ukuba yome ngokukhawuleza kwaye iqhekeke kumphezulu ngexesha lokwakhiwa.
Izifundo zibonise ukuba ngokonyuka komthamo we-HPMC, ukugcinwa kwamanzi kwi-mortar kuyakhula kancinci kancinci. Nangona kunjalo, xa umthamo uphezulu kakhulu, i-rheology ye-mortar inokuba nkulu kakhulu, ichaphazele ukusebenza kolwakhiwo. Ke ngoko, umthamo ofanelekileyo we-HPMC kufuneka uhlengahlengiswe ngokwendlela osetyenziswa ngayo ngokwenene.
2. Isiphumo sedosi ye-HPMC kumandla okubopha kwe-gypsum mortar
Amandla okubopha yenye indlela ephambili yokusebenza kwe-gypsum mortar, echaphazela ngokuthe ngqo ukunamathelana phakathi kwe-mortar kunye nesiseko. I-HPMC, njenge-polymer ephezulu yeemolekyuli, inokuphucula ukuhambelana kunye nokusebenza kokubopha kwe-mortar. Ubungakanani obufanelekileyo be-HPMC bunokuphucula ukubopha kwe-mortar, ukuze ikwazi ukwenza ukunamathelana okuqinileyo nodonga kunye ne-substrate ngexesha lokwakha.
Izifundo zovavanyo zibonise ukuba umthamo we-HPMC unefuthe elikhulu kumandla okubopha kwe-mortar. Xa umthamo we-HPMC ukwinqanaba elithile (ngesiqhelo yi-0.2%-0.6%), amandla okubopha abonisa ukunyuka. Oku kungenxa yokuba i-HPMC inokuphucula ukuqina kwe-mortar, ukuze ikwazi ukulingana ngcono ne-substrate ngexesha lokwakhiwa kwaye inciphise ukuqhekeka nokuqhekeka. Nangona kunjalo, ukuba umthamo uphezulu kakhulu, i-mortar inokuba nokuchacha okugqithisileyo, okuchaphazela ukunamathela kwayo kwi-substrate, ngaloo ndlela inciphisa amandla okubopha.
3. Impembelelo yedosi ye-HPMC kwi-fluidity kunye nokusebenza kolwakhiwo lwe-gypsum mortar
Ukutyibilika kolwelo luphawu olubaluleke kakhulu lokusebenza kwinkqubo yokwakha i-gypsum mortar, ingakumbi kulwakhiwo lodonga olukhulu. Ukongezwa kwe-HPMC kunokuphucula kakhulu ukutyibilika kolwelo, okwenza kube lula ukwakha nokusebenza. Iimpawu zesakhiwo se-molecular se-HPMC ziyenza ikwazi ukwandisa i-viscosity yolwelo ngokulutyeba, ngaloo ndlela iphucula ukusebenza kakuhle kunye nokusebenza kolwelo.
Xa idosi ye-HPMC iphantsi, ukutyibilika kwesamente kuyaba kubi, nto leyo enokubangela ubunzima bokwakha kwanokuqhekeka. Ubungakanani obufanelekileyo bedosi ye-HPMC (ngesiqhelo phakathi kwe-0.2%-0.6%) bunokuphucula ukutyibilika kwesamente, buphucule ukusebenza kwayo kokugquma kunye nesiphumo sokuthambisa, ngaloo ndlela buphucule ukusebenza kakuhle kokwakha. Nangona kunjalo, ukuba idosi iphezulu kakhulu, ukutyibilika kwesamente kuya kuba nzima kakhulu, inkqubo yokwakha iya kuba nzima, kwaye inokukhokelela kwinkunkuma yezinto eziphathekayo.
4. Isiphumo sedosi ye-HPMC ekuncipheni kodaka lwe-gypsum okomisayo
Ukuncipha kokomisa yenye impawu ebalulekileyo ye-gypsum mortar. Ukuncipha kakhulu kunokubangela iintanda eludongeni. Ukongezwa kwe-HPMC kunokunciphisa ngempumelelo ukuncipha kokomisa kwe-mortar. Olu phononongo lufumanise ukuba ubungakanani obufanelekileyo be-HPMC bunokunciphisa ukufuma kwamanzi ngokukhawuleza, ngaloo ndlela kunciphise ingxaki yokuncipha kokomisa kwe-gypsum mortar. Ukongeza, ulwakhiwo lwe-molecular ye-HPMC lunokwenza isakhiwo senethiwekhi esizinzileyo, nto leyo ephucula ngakumbi ukumelana kweentanda kwe-mortar.
Nangona kunjalo, ukuba idosi ye-HPMC iphezulu kakhulu, inokubangela ukuba i-mortar ihlale ixesha elide, nto leyo echaphazela ukusebenza kakuhle kolwakhiwo. Kwangaxeshanye, i-viscosity ephezulu inokubangela ukusasazwa kwamanzi ngokungalinganiyo ngexesha lolwakhiwo, nto leyo echaphazela ukuphucuka kokuncipha.
5. Isiphumo sedosi ye-HPMC ekuchaseni ukuqhekeka kwe-gypsum mortar
Ukumelana nokuqhekeka luphawu olubalulekileyo lokuvavanya umgangatho we-gypsum mortar. I-HPMC inokuphucula ukumelana kwayo nokuqhekeka ngokuphucula amandla okucinezelwa, ukunamathela kunye nokuqina kwe-mortar. Ngokongeza ubungakanani obufanelekileyo be-HPMC, ukumelana nokuqhekeka kwe-gypsum mortar kunokuphuculwa ngempumelelo ukuze kuthintelwe ukuqhekeka okubangelwa ngamandla angaphandle okanye utshintsho lobushushu.
Idosi efanelekileyo ye-HPMC ngokubanzi iphakathi kwe-0.3% kunye ne-0.5%, nto leyo enokuphucula ukuqina kwesakhiwo se-mortar kwaye inciphise iintanda ezibangelwa kukwahluka kobushushu kunye nokuncitshiswa. Nangona kunjalo, ukuba idosi iphezulu kakhulu, i-viscosity egqithisileyo inokubangela ukuba i-mortar iphole kancinci kakhulu, ngaloo ndlela ichaphazele ukumelana kwayo neentanda ngokubanzi.
6. Ukwenziwa ngcono kunye nokusetyenziswa okusebenzayo kwedosi ye-HPMC
Ukusuka kuhlalutyo lwezalathisi zokusebenza ezingasentla, idosi yeI-HPMCinempembelelo enkulu ekusebenzeni kwe-gypsum mortar. Nangona kunjalo, uluhlu olufanelekileyo lwedosi yinkqubo yokulinganisela, kwaye idosi idla ngokucetyiswa ukuba ibe yi-0.2% ukuya kwi-0.6%. Iindawo ezahlukeneyo zokwakha kunye neemfuno zokusetyenziswa zinokufuna uhlengahlengiso kwidosi ukuze kufezekiswe ukusebenza okungcono. Kwizicelo ezisebenzayo, ukongeza kwidosi ye-HPMC, ezinye izinto kufuneka ziqwalaselwe, njengomlinganiselo wedosi, iimpawu ze-substrate, kunye neemeko zokwakha.
Umlinganiselo we-HPMC unempembelelo enkulu ekusebenzeni kwe-gypsum mortar. Ubungakanani obufanelekileyo be-HPMC bunokuphucula ngempumelelo iimpawu eziphambili ze-mortar ezifana nokugcinwa kwamanzi, amandla okubopha, ukunyibilika, kunye nokumelana nokuqhekeka. Ulawulo lomlinganiselo kufuneka luqwalasele ngokupheleleyo iimfuno zokusebenza kolwakhiwo kunye namandla okugqibela e-mortar. Umlinganiselo ofanelekileyo we-HPMC awunakuphucula kuphela ukusebenza kolwakhiwo lwe-mortar, kodwa uphucule nokusebenza kwexesha elide kwe-mortar. Ke ngoko, kwimveliso yokwenyani kunye nokwakhiwa, umthamo we-HPMC kufuneka uphuculwe ngokweemfuno ezithile ukuze kufezekiswe isiphumo esingcono.
Ixesha leposi: Disemba-16-2024