Imikhiqizo yesamente, njengekhonkrithi, udaka, nezinye izinto zokwakha, isetshenziswa kabanzi ezakhiweni zesimanje. Ama-cellulose ethers (njenge-hydroxypropyl methylcellulose (HPMC), i-hydroxyethyl methylcellulose (HEMC), njll.) ayizithasiselo ezibalulekile ezingathuthukisa kakhulu ukusebenza kwemikhiqizo yesamente. Ukuze kufezwe lezi zakhiwo ezinhle kakhulu, kubalulekile ukuba yingcweti nokulawula ukusebenza kwama-cellulose ethers.
1. Izakhiwo eziyisisekelo kanye nemisebenzi yama-cellulose ethers
Ama-cellulose ether ayisigaba sezinto ezisuselwa kumakhemikhali ze-cellulose yemvelo, lapho iqembu le-hydroxyl lithathelwa indawo ngokwengxenye yiqembu le-ether ngokusebenzisa ukusabela kwe-etherification. Izinhlobo ezahlukene zama-cellulose ethers zingakhiwa ngokuya ngohlobo nenani lezinto ezithatha indawo, futhi uhlobo ngalunye lunendima ehlukile emikhiqizweni yesamente.
Ukuqina kwama-ether e-cellulose:
Ukuqina kwama-ether e-cellulose kuthinta ngqo i-rheology kanye nokuqina kwe-paste yesimende. Ama-ether e-cellulose ane-viscosity ephezulu angathuthukisa ukugcinwa kwamanzi kanye namandla okubopha kwe-paste, kodwa anganciphisa ukugeleza kwayo. Ama-ether e-cellulose ane-viscosity ephansi asiza ekuthuthukiseni ukusebenza kanye nokugeleza.
Izinga lokushintshana (DS) kanye nokushintshana kwe-molar (MS):
Izinga lokushintsha kanye nokushintshana kwe-molar kwama-cellulose ethers kunquma ukuncibilika kwawo kanye nokuthamba kwesisombululo. Izinga eliphezulu lokushintsha kanye nokushintshana kwe-molar ephezulu ngokuvamile kungathuthukisa ukugcinwa kwamanzi kanye nokuqina kwama-cellulose ethers.
Ukuncibilika kwama-ether e-cellulose:
Izinga lokuncibilika kanye nokuncibilika kwama-ether e-cellulose kuthinta ukufana kwe-paste yesimende. Ama-ether e-cellulose anokuncibilika okuhle angakha ikhambi elifanayo ngokushesha, ngaleyo ndlela aqinisekise ukufana kanye nokuqina kwe-paste.
2. Khetha ama-ether e-cellulose afanele
Izimo ezahlukene zokusetshenziswa zinezidingo ezahlukene zokusebenza kwama-cellulose ethers. Ukukhetha uhlobo olufanele kanye nokucaciswa kwe-cellulose ether kungathuthukisa kakhulu ukusebenza kwemikhiqizo yesamente:
Izihlanganisi:
Ezinhlelweni ezifana nezinamathiselo zamathayili kanye nama-plaster mortars, ama-ether e-cellulose ane-viscosity ephezulu (njenge-HPMC) anganikeza ukunamathela okungcono kanye nokumanzi okuhlala isikhathi eside, ngaleyo ndlela kuthuthukiswe ukusebenza kokwakhiwa kanye namandla okugcina okubopha.
Izinto zokugcina amanzi:
Kuma-mortar azimele kanye nama-adhesive ethayela asekelwe kusimende, kudingeka ama-ether e-cellulose anokugcinwa kwamanzi okuphezulu (njenge-HEMC). Ukugcinwa kwamanzi okuphezulu kusiza ukuvimbela ukulahleka kwamanzi ngaphambi kwesikhathi, ngaleyo ndlela kuqinisekiswe ukusabela okwanele komswakama kanye nesikhathi eside sokusebenza.
Izinto zokuqinisa:
Ama-cellulose ether asetshenziselwa ukukhulisa amandla emikhiqizo yesimende kudingeka abe nokuhlakazeka okuhle kanye ne-viscosity ephakathi ukuze athuthukise ukufana kanye namandla e-matrix.
3. Lungiselela indlela yokwengeza
Ukulawula indlela yokwengeza i-cellulose ether emikhiqizweni yesamente kubalulekile ukuze kukhuliswe ukusebenza kwayo. Nazi izindlela eziningana ezivamile zokwenza ngcono:
Indlela yokuxuba kusengaphambili:
Hlanganisa i-cellulose ether nezinye izinto zempuphu eyomile kusengaphambili. Le ndlela ingagwema ukwakheka kokuhlanganiswa kwe-cellulose ether ngemva kokuxhumana ngqo namanzi, ngaleyo ndlela iqinisekise ukusabalala kwayo okufanayo ku-slurry.
Indlela yokuxuba emanzi:
Faka i-cellulose ether ku-slurry yesimende kancane kancane. Le ndlela ifaneleka esimweni lapho i-cellulose ether incibilika ngokushesha futhi isiza ekwakheni ukumiswa okuzinzile.
Indlela yokwengeza ngezigaba:
Enkambisweni yokulungisa udaka lukasimende, ukwengeza i-cellulose ether ezigabeni kungaqinisekisa ukusatshalaliswa kwayo okufanayo kuyo yonke inqubo yokulungiselela futhi kunciphise ukuhlangana.
4. Lawula izici zangaphandle
Izici zangaphandle ezifana nokushisa, inani le-pH, kanye nesilinganiso sokuvuselela zinomthelela omkhulu ekusebenzeni kwe-cellulose ether.
Ukulawula izinga lokushisa:
Ukuncibilika kanye nokuthamba kwe-cellulose ether kuzwela kakhulu ekushiseni. Amazinga okushisa aphezulu asiza i-cellulose ether ukuthi incibilike ngokushesha, kodwa futhi kungabangela ukuthi ukuthamba kwesisombululo kwehle. Izinga lokushisa kufanele lilungiswe ngokwesimo esithile sokusetshenziswa ukuqinisekisa ukusebenza kahle nokusebenza kahle.
Ukulungiswa kwe-pH: Inani le-pH le-paste yesamente livame ukuba sebangeni eliphezulu le-alkaline, kuyilapho ukuncibilika kanye ne-viscosity ye-cellulose ether kushintshashintsha ngokushintsha kwenani le-pH. Ukulawula inani le-pH ngaphakathi kobubanzi obufanele kungazinzisa ukusebenza kwe-cellulose ether.
Izinga lokuxuba: Izinga lokuxuba lithinta umphumela wokusabalala kwe-cellulose ether ku-cement paste. Izinga lokuxuba eliphezulu kakhulu lingabangela ukungeniswa komoya kanye nokuhlanganiswa kwe-cellulose ether, kuyilapho izinga lokuxuba eliphakathi lisiza ukusabalalisa ngokulinganayo nokuncibilikisa i-cellulose ether.
5. Ukuhlaziywa kwecala kanye neziphakamiso ezisebenzayo
Ngokuhlaziywa kwangempela kwamacala, singaqonda kabanzi isu lokusebenzisa nokwenza ngcono i-cellulose ether emikhiqizweni ehlukene yesimende:
I-adhesive yethayela esebenza kahle kakhulu: Lapho inkampani ikhiqiza i-adhesive yethayela esebenza kahle kakhulu, kwatholakala ukuthi ukugcinwa kwamanzi komkhiqizo wokuqala kwakwanele, okwaholela ekunciphiseni kwamandla okubopha ngemva kokwakhiwa. Ngokufaka i-HEMC egcina amanzi amaningi kanye nokulungisa inani layo lokwengeza kanye nendlela yokwengeza (kusetshenziswa indlela yokuxuba ngaphambi kokuxuba), ukugcinwa kwamanzi kanye namandla okubopha kwe-adhesive yethayela kwathuthukiswa ngempumelelo.
Izinto zokwakha phansi ezizilinganisayo: Izinto zokwakha phansi ezizilinganisayo ezisetshenziswa kuphrojekthi ethile zazinomswakama ophansi kanye nokuthamba okuphansi ngemuva kokwakhiwa. Ngokukhetha i-HPMC ene-viscosity ephansi kanye nokwenza ngcono izinga lokuxuba kanye nokulawula izinga lokushisa, umswakama kanye nokusebenza kokwakhiwa kwe-slurry kuyathuthukiswa, okwenza indawo yokugcina yephansi ibe bushelelezi.
Ukulawula ukusebenza kwe-cellulose ether emikhiqizweni yesamente kuyisihluthulelo sokuthuthukisa ukusebenza kwezinto kanye nekhwalithi yokwakha. Ngokukhetha uhlobo olufanele lwe-cellulose ether, ukwenza ngcono indlela yokwengeza, kanye nokulawula izici zangaphandle ezithonyayo, izakhiwo ezibalulekile zemikhiqizo yesamente njengokugcinwa kwamanzi, ukunamathela, kanye nokugeleza kwamanzi kungathuthukiswa kakhulu. Ezisetshenzisweni ezisebenzayo, kuyadingeka ukwenza ngcono njalo nokulungisa ukusetshenziswa kwe-cellulose ether ngokwezidingo ezithile kanye nezimo zokusetshenziswa ukuze kutholakale imiphumela emihle kakhulu.
Isikhathi sokuthunyelwe: Juni-26-2024