I-Hydroxypropyl Methylcellulose (HPMC) yi-ether ye-cellulose ebalulekileyo esetyenziswa ngokubanzi kwi-dry-mixed mortar ukuphucula umsebenzi wayo wokwakha. Indlela yokusebenza ye-HPMC kwi-dry-mixed mortar ibonakala ikakhulu ekugcinweni komswakama, ukulungelelaniswa kokulungelelaniswa, ukuxhathisa kwe-sag kunye nokuchasana nokuqhekeka.
1. Ukugcinwa kokufuma
Indima ephambili ye-HPMC kukuphucula amandla okugcina amanzi odaka lomxube owomileyo. Ngethuba lokwakha, ukukhuphuka ngokukhawuleza kwamanzi kwi-mortar kuya kubangela ukuba kume ngokukhawuleza, kubangele ukugqithiswa okungaphelelanga kwe-samente kunye nokuchaphazela amandla okugqibela. Isakhiwo se-molecular ye-HPMC iqulethe inani elikhulu lamaqela e-hydrophilic (afana ne-hydroxyl kunye namaqela e-methoxy), anokwenza iibhondi ze-hydrogen kunye nokuphucula kakhulu ukugcinwa kwamanzi. Isakhiwo sothungelwano esisenza kudaka sinceda ukutshixa ukufuma, ngaloo ndlela sicotha isantya sokuphuphuma kwamanzi.
Ukugcinwa kwamanzi akuncedi nje ukwandisa ixesha lokusebenza kodaka, kodwa kwakhona kuphucula kakhulu ukugudiswa kolwakhiwo kwindawo yokushisa ephantsi okanye eyomileyo. Ngokugcina ukufuma okwaneleyo, i-HPMC yenza ukuba udaka lugcine ukusebenza kakuhle ngexesha elide, ukuphepha ukuqhekeka kunye nobunzima bokwakha obubangelwa yilahleko yokufuma.
2. Uhlengahlengiso oluhambelanayo
I-HPMC nayo inomsebenzi wokulungelelanisa ukuhambelana kodaka olomileyo oluxubeneyo, olubalulekileyo kumanzi kunye nokusabalalisa kolwakhiwo. I-HPMC yenza isisombululo se-colloidal xa inyibilika emanzini, kwaye i-viscosity yayo iyanda ngokunyuka kwe-molecular weight. Ngexesha lenkqubo yokwakha, iipropathi ze-colloidal ze-HPMC zigcina i-mortar kwi-consistency ethile kwaye zigweme ukuncipha kombane wodaka ngenxa yokuhlukana komswakama.
Ukuhambelana okufanelekileyo kuqinisekisa ukuba udaka lufakwe ngokulinganayo kwi-substrate kwaye lungakwazi ukuzalisa ngokufanelekileyo ii-pores kunye neendawo ezingaqhelekanga kumphezulu we-substrate. Olu phawu lubaluleke kakhulu ukuqinisekisa ukunamathela kunye nokwakhiwa komgangatho wodaka. I-HPMC inokuphinda ilungelelanise iimfuno ezahlukeneyo zokwakha ngokulungelelanisa imilinganiselo eyahlukeneyo kunye nokubonelela ngokusebenza okulawulekayo.
3. Ipropati ye-Anti-sag
Kwimigangatho yolwakhiwo eme nkqo okanye ethambekileyo (efana nokutyatyekwa eludongeni okanye ukudityaniswa kweemasonry), udaka luthanda ukuhexa okanye ukutyibilika ngenxa yobunzima balo. I-HPMC yongeza ukuxhathisa kwe-sag yodaka ngokunyusa i-thixotropy yayo. Thixotropy ibhekisa kwisakhono sodaka ukunciphisa i-viscosity yayo xa iphantsi kwamandla okucheba kunye nokubuyisela i-viscosity yayo emva kokunyamalala kwamandla okucheba. I-HPMC inokwenza i-slurry kunye ne-thixotropy elungileyo, okwenza udaka lube lula ukulusebenzisa ngexesha lokwakha, kodwa inokubuyisela ngokukhawuleza i-viscosity yayo kwaye ilungiswe kwindawo yokwakha emva kokuyeka ukusebenza.
Olu phawu lunciphisa kakhulu inkunkuma yodaka kwaye luphucula ukusebenza kakuhle kunye nomgangatho wokwakha. Kwizicelo ezifana ne-tile bonding, i-HPMC's sag resistance inokuqinisekisa ukuba iithayile azihambi emva kokubekwa, ngaloo ndlela kuphuculwe ukuchaneka kolwakhiwo.
4. Ukumelana nokuqhekeka
Umdaka oxubeneyo owomileyo emva kokwakhiwa ulungele ukuqhekeka ngexesha lenkqubo yokuqina, eyona nto ibangelwa yi-shrinkage ebangelwa ukusabalalisa ngokungalingani komswakama wangaphakathi. Ngokuphucula ukugcinwa kwamanzi kunye nokuhambelana kodaka, i-HPMC iyakwazi ukunciphisa i-gradients yangaphakathi yokufuma, ngaloo ndlela inciphisa uxinzelelo lwe-shrinkage. Ngelo xesha, i-HPMC inokusasaza kwaye ifunxe uxinzelelo lwe-shrinkage kunye nokunciphisa ukwenzeka kokuqhekeka ngokwenza i-flexible network structure kwi-mortar.
Ukuchasana nokuqhekeka kubalulekile ekwandiseni ukuqina kunye nobomi benkonzo yodaka. Lo msebenzi we-HPMC wenza ukuba udaka lugcine iimpawu ezintle zomzimba ngexesha lokusetyenziswa kwexesha elide kwaye alufaneki ukukrazula kunye nokuxobula.
5. Iimeko zokwakha kunye nezicelo
Kulwakhiwo oluyinyani, i-HPMC idla ngokudityaniswa kwiindidi ezahlukeneyo zodaka oluxubeneyo olomileyo ngokweemfuno ezithile, ezinje ngodaka lokutyabeka, iithayile zokubopha iithayile kunye nodaka lokuzilinganisa. Umlinganiselo othile wokongezwa kunye nomlinganiselo kufuneka uphuculwe ngokohlobo lodaka, ubume besiseko semathiriyeli kunye nemeko yendawo yokwakha. Ngokomzekelo, xa kwakhiwa kwindawo yobushushu obuphezulu, ngokufanelekileyo ukwandisa inani le-HPMC kunokuphucula ukugcinwa kwamanzi omdaka kunye nokuphepha ubunzima bokwakha kunye neengxaki zekhwalithi ezibangelwa ukomisa ngokukhawuleza.
Ekusetyenzisweni kwee-adhesive tile ze-ceramic, i-HPMC inokubonelela ngokugqwesa ukunamathela kunye nokumelana ne-sag ukuqinisekisa ukubambelela ngokuqinileyo kweetayile ze-ceramic eludongeni. Ngexesha elifanayo, ngokulungelelanisa inani le-HPMC elongeziweyo, ixesha lokuvula udaka lingalawulwa ukuququzelela ukusebenza kwabasebenzi bokwakha.
I-Hydroxypropyl methylcellulose (i-HPMC), njenge-additive esebenzayo, iphucula kakhulu ukwakhiwa kodaka oluxutyiweyo ngokugcinwa kwamanzi, ukulungelelaniswa kokulungelelaniswa, i-anti-sag kunye ne-anti-cracking properties. Ezi zakhiwo aziphuculi kuphela iimpawu zokuphatha udaka, kodwa ziphucula umgangatho wokwakha kunye nokuqina. Ukusetyenziswa okunengqiqo kwe-HPMC kunokumelana ngokufanelekileyo nemingeni yeendawo ezahlukeneyo zokwakha kunye nokubonelela ngezisombululo zezinto eziphathekayo ezingcono kwiiprojekthi zokwakha. Kwixesha elizayo, ngophuhliso oluqhubekayo lwesayensi yezinto kunye nobuchwepheshe bokwakha, amathuba okusetyenziswa kwe-HPMC kwi-dry-mixed mortar iya kuba banzi.
Ixesha lokuposa: Jul-10-2024