1. Isishwankathelo se-cellulose ether (HPMC)
I-Hydroxypropyl methylcellulose (HPMC) yi-compound ye-cellulose ether esetyenziswa kakhulu, eguqulwa ngokweekhemikhali kwi-cellulose yendalo. Ineempawu ezibalaseleyo zokunyibilika kwamanzi, ukwenza ifilimu, ukuqina kunye nokuncamathelisa, ngoko ke isetyenziswa kakhulu kwizixhobo zokwakha. Ukusetyenziswa kwe-HPMC kwizixhobo ezisekwe kwisamente ikakhulu kukuphucula ukunyibilika kwayo, ukugcinwa kwamanzi kunye nokulungisa ixesha lokuseta.
2. Inkqubo esisiseko yokuseta isamente
Inkqubo yokusabela kwesamente namanzi ukuze yenze ii-hydrate ibizwa ngokuba yi-hydration reaction. Le nkqubo yahlulwe yangamanqanaba aliqela:
Ixesha lokungenisa: Amasuntswana esamente aqala ukunyibilika, enze ii-ion ze-calcium kunye nee-ion ze-silicate, nto leyo ebonisa imeko yokuhamba kwexesha elifutshane.
Ixesha lokukhawulezisa: Iimveliso zokufunxa amanzi ziyanda ngokukhawuleza kwaye inkqubo yokuseta iyaqala.
Ixesha lokuncipha komswakama: Izinga lokufuma kwamanzi liyehla, isamente iqala ukuqina, kwaye kwenziwa ilitye lesamente eliqinileyo.
Ixesha lokuzinza: Iimveliso zokufunxa amanzi ziyavuthwa kancinci kancinci kwaye amandla ayakhula kancinci kancinci.
Ixesha lokuseta lidla ngokwahlulwahlulwa libe lixesha lokuseta lokuqala kunye nexesha lokugqibela lokuseta. Ixesha lokuseta lokuqala libhekisa kwixesha apho intlama yesamente iqala ukulahlekelwa yiplastiki, kwaye ixesha lokugqibela lokuseta libhekisa kwixesha apho intlama yesamente ilahlekelwa yiplastiki ngokupheleleyo kwaye ingena kwinqanaba lokuqina.
3. Indlela yempembelelo ye-HPMC kwixesha lokuseta isamente
3.1 Isiphumo sokuqina
I-HPMC inefuthe elikhulu lokutyeba. Inganyusa ukutyeba kwentlama yesamente kwaye yenze inkqubo yokutyeba okuphezulu. Esi siphumo sokutyeba siya kuchaphazela ukusasazeka kunye nokutsalwa kweengceba zesamente, ngaloo ndlela sichaphazele inkqubela yokusabela kokutyeba. Isiphumo sokutyeba sinciphisa izinga lokufakwa kweemveliso zokutyeba kumphezulu weengceba zesamente, ngaloo ndlela sibambezela ixesha lokuseta.
3.2 Ukugcinwa kwamanzi
I-HPMC inomthamo olungileyo wokugcina amanzi. Ukongeza i-HPMC kwi-samente paste kunokuphucula kakhulu ukugcinwa kwamanzi kwe-paste. Ukugcinwa kwamanzi amaninzi kunokuthintela amanzi aphezu kwesamente ukuba angatshi ngokukhawuleza, ukuze kugcinwe umxholo wamanzi kwi-samente paste kwaye kwandise ixesha lokuphendula ngamanzi. Ukongeza, ukugcinwa kwamanzi kunceda i-samente paste igcine umswakama ofanelekileyo ngexesha lenkqubo yokucola kwaye inciphise umngcipheko wokuqhekeka okubangelwa kukulahleka kwamanzi kwangoko.
3.3 Ukulibaziseka komthamo wamanzi emzimbeni
I-HPMC inokwenza ifilimu ekhuselayo egubungela umphezulu weenxalenye zesamente, nto leyo eya kuthintela ukusabela komswakama. Le filimu ekhuselayo ithintela ukudibana ngqo phakathi kweenxalenye zesamente namanzi, ngaloo ndlela ilibazisa inkqubo yomswakama wesamente kwaye yandise ixesha lokubeka. Esi siphumo sokulibazisa sibonakala ngakumbi kwi-HPMC enobunzima obukhulu.
3.4 Ukuphucula i-thixotropy
Ukongezwa kwe-HPMC kunokuphucula i-thixotropy ye-samente slurry (oko kukuthi, ukugeleza kuyanda phantsi kwesenzo samandla angaphandle kwaye kubuyela kwimeko yokuqala emva kokuba amandla angaphandle esusiwe). Le propati ye-thixotropic inceda ukuphucula ukusebenza kwe-samente slurry, kodwa ngokwexesha lokuseta, le thixotropy iphuculweyo inokubangela ukuba i-slurry iphinde isasazeke phantsi kwamandla okucheba, nto leyo eyandisa ixesha lokuseta.
4. Ukusetyenziswa ngokoqobo kwe-HPMC okuchaphazela ixesha lokuseta isamente
4.1 Izixhobo zomgangatho ezizilinganisa ngokwazo
Kwizinto zomgangatho ezizilinganisayo, isamente ifuna ixesha elide lokuqala lokuseta i-leveling kunye ne-screeding. Ukongeza i-HPMC kunokwandisa ixesha lokuqala lokuseta isamente, okuvumela izinto ezizilinganisayo ukuba zibe nexesha elide lokusebenza ngexesha lokwakha, kuthintelwe ingxaki ebangelwa kukuseta i-slurry yesamente ngaphambi kwexesha ngexesha lokwakha.
4.2 Udaka oluxutyiweyo kwangaphambili
Kwi-mortar exutyiweyo kwangaphambili, i-HPMC ayiphuculi nje kuphela ukugcinwa kwamanzi kwi-mortar, kodwa ikwandisa ixesha lokuseta. Oku kubaluleke kakhulu kwiimeko apho ixesha elide lokuthuthwa kunye nexesha lokwakha lihlala lisebenza kakuhle ngaphambi kokusetyenziswa kwaye ithintela ubunzima bokwakha obubangelwa lixesha elifutshane kakhulu lokuseta.
4.3 Idaka elixutywe nodaka olomileyo
I-HPMC idla ngokufakwa kwi-mortar exutywe nodaka ukuze kuphuculwe ukusebenza kwayo ekwakheni. Isiphumo sokuqina kwe-HPMC sonyusa i-viscosity ye-mortar, okwenza kube lula ukuyisebenzisa kunye nokulinganisa ngexesha lokwakha, kwaye kwandise ixesha lokuseta, okunika abasebenzi bokwakha ixesha elaneleyo lokwenza uhlengahlengiso.
5. Izinto ezichaphazela ixesha lokuseta isamente yi-HPMC
5.1 Isixa esongeziweyo se-HPMC
Ubungakanani be-HPMC eyongeziweyo yinto ephambili echaphazela ixesha lokuseta isamente. Ngokubanzi, xa i-HPMC ingaphezulu, kokukhona ixesha lokuseta isamente licaca ngakumbi. Oku kungenxa yokuba iimolekyuli ezininzi ze-HPMC zinokugubungela imiphezulu engaphezulu yamasuntswana esamente kwaye zithintele ukusabela kwamanzi.
5.2 Ubunzima beemolekyuli ze-HPMC
I-HPMC yobunzima beemolekyuli ezahlukeneyo inefuthe elahlukileyo kwixesha lokuseta isamente. I-HPMC enobunzima beemolekyuli obuphezulu idla ngokuba nefuthe eliqinileyo lokutyeba kunye namandla okugcina amanzi, ngoko ke inokwandisa ixesha lokuseta ngokuphawulekayo. Nangona i-HPMC enobunzima beemolekyuli obuphantsi inokwandisa ixesha lokuseta, isiphumo sibuthathaka kakhulu.
5.3 Iimeko zokusingqongileyo
Ubushushu obuphakathi kunye nokufuma kuya kuchaphazela impembelelo ye-HPMC kwixesha lokuseta isamente. Kwindawo enobushushu obuphezulu, impendulo yokufunxa isamente iyakhawuleza, kodwa ipropati yokugcina amanzi ye-HPMC iyayicothisa le mpembelelo. Kwindawo enobushushu obuphantsi, impendulo yokufunxa amanzi ngokwayo iyacotha, kwaye impembelelo yokutyeba kunye nokugcinwa kwamanzi ye-HPMC inokubangela ukuba ixesha lokuseta isamente lide kakhulu.
5.4 Umlinganiselo wamanzi nesamente
Utshintsho kumlinganiselo wamanzi nesamente luya kuchaphazela nempembelelo ye-HPMC kwixesha lokuseta isamente. Kumlinganiselo ophezulu wamanzi nesamente, kukho amanzi amaninzi kwintlama yesamente, kwaye impembelelo yokugcina amanzi ye-HPMC inokuba nempembelelo encinci kwixesha lokuseta. Kumlinganiselo ophantsi wamanzi nesamente, impembelelo yokutyeba ye-HPMC iya kubonakala ngakumbi, kwaye impembelelo yokwandisa ixesha lokuseta iya kuba nkulu ngakumbi.
Njengesongezo esibalulekileyo sesamente, i-HPMC ichaphazela kakhulu ixesha lokuseta isamente ngeendlela ezahlukeneyo ezifana nokuqina, ukugcinwa kwamanzi, kunye nokulibaziseka kokusabela kokufuma. Ukusetyenziswa kwe-HPMC kunokwandisa ixesha lokuqala nelokugqibela lokuseta isamente, kubonelele ngexesha elide lokusebenza kokwakha, kwaye kuphucule ukusebenza kwezixhobo ezisekwe kwisamente. Kwizicelo ezisebenzayo, izinto ezifana nobungakanani be-HPMC eyongeziweyo, ubunzima beemolekyuli, kunye neemeko zokusingqongileyo zimisela impembelelo yayo ethile kwixesha lokuseta isamente. Ngokulungisa ezi zinto ngokwengqiqo, ulawulo oluchanekileyo lwexesha lokuseta isamente lunokufezekiswa ukuhlangabezana neemfuno zeeprojekthi ezahlukeneyo zokwakha.
Ixesha leposi: Juni-21-2024