Isimiso sokusebenza se-hydroxypropyl methylcellulose ku-mortar

I-Hydroxypropyl methylcellulose (HPMC)iyinhlanganisela ye-polymer encibilika emanzini esetshenziswa kabanzi embonini yokwakha, ikakhulukazi ku-mortar esekelwe kusimende, ku-mortar esekelwe ku-gypsum kanye ne-adhesive yethayela. Njengesengezo se-mortar, i-HPMC ingathuthukisa ukusebenza kokwakhiwa, ithuthukise ukusebenza kahle, ukunamathela, ukugcinwa kwamanzi kanye nokumelana nokuqhekeka kwe-mortar, ngaleyo ndlela ithuthukise ikhwalithi iyonke ye-mortar.

1. Izakhiwo eziyisisekelo ze-HPMC

I-HPMC itholakala kakhulu ngokuguqulwa kwe-cellulose nge-etherification, futhi inokuncibilika kwamanzi okuhle, ukuqina, ukwakha ifilimu, ukuthambisa kanye nokuqina. Izakhiwo zayo ezibalulekile zomzimba zifaka:

Ukuncibilika kwamanzi: Kungancibilika emanzini abandayo noma ashisayo ukuze kwakheke isixazululo esibonakalayo noma esicwebezelayo.
Umphumela wokujiya: Kungakhuphula kakhulu ukujiya kwesisombululo futhi kubonise umphumela omuhle wokujiya ekugxilweni okuphansi.
Ukugcinwa kwamanzi: I-HPMC ingamunca amanzi futhi ivuvuke, futhi idlale indima ekugcinweni kwamanzi ku-mortar ukuvimbela amanzi ukuthi alahleke ngokushesha okukhulu.
Izakhiwo ze-Rheological: Ine-thixotropy enhle, esiza ekuthuthukiseni ukusebenza kokwakhiwa kwe-mortar.

2. Indima eyinhloko ye-HPMC ku-mortar

Indima ye-HPMC ku-mortar ibonakala kakhulu kulezi zici ezilandelayo:

2.1 Ukuthuthukisa ukugcinwa kwamanzi kwe-mortar

Ngesikhathi senqubo yokwakha udoti wesamente, uma amanzi ehwamuka ngokushesha kakhulu noma emuncwa kakhulu yisisekelo, kuzoholela ekusabeleni kokwanele kokumuncwa kwesamente futhi kuthinte ukukhula kwamandla. I-HPMC yakha isakhiwo se-mesh esifanayo kudoti ngokusebenzisa amandla ayo okusebenzisa amanzi kanye nekhono lokumuncwa kwamanzi kanye nokukhula, ivala umswakama, inciphisa ukulahleka kwamanzi, ngaleyo ndlela yandise isikhathi sokuvula kodoti futhi ithuthukise ukuzivumelanisa nokwakhiwa.

2.2 Umphumela wokuqina, okuthuthukisa ukusebenza kahle kwe-mortar

I-HPMC inomphumela omuhle wokuqina, ongakhulisa ukujiya kwe-mortar, wenze i-mortar ibe ne-plasticity engcono, futhi uvimbele i-mortar ukuthi ingahlukani, ihlukaniswe futhi iphume amanzi. Ngesikhathi esifanayo, ukuqina okufanele kungathuthukisa ukwakhiwa kwe-mortar, kwenze kube lula ukuyisebenzisa kanye nokulinganisa ngesikhathi senqubo yokwakha, futhi kuthuthukise ukusebenza kahle kokwakha.

2.3 Thuthukisa ukubopha futhi uthuthukise ukunamathela kwe-mortar

Ezisetshenzisweni ezifana nokunamathela kwethayela, udaka lokubumba kanye nodaka lokusimende, amandla okubopha kodaka abalulekile. I-HPMC yakha ifilimu ye-polymer efanayo phakathi kwesisekelo kanye nopende ngokusebenzisa isenzo sokwakha ifilimu, okuthuthukisa amandla okubopha kodaka ku-substrate, ngaleyo ndlela kunciphisa ingozi yokuqhekeka nokuwa kodaka.

2.4 Thuthukisa ukusebenza kokwakha futhi unciphise ukuwohloka

Ngokwakhiwa kwendawo eqondile (njengokuplasta odongeni noma ukwakhiwa kwe-tile adhesive), i-mortar ivame ukugoba noma ukushelela ngenxa yesisindo sayo. I-HPMC ikhulisa ukucindezeleka kwesivuno kanye nokulwa nokugoba kwe-mortar, ukuze i-mortar ikwazi ukunamathela kangcono ebusweni besisekelo ngesikhathi sokwakhiwa okuqondile, ngaleyo ndlela ithuthukise ukuzinza kokwakhiwa.

2.5 Thuthukisa ukumelana nokuqhekeka futhi uthuthukise ukuqina

I-mortar ivame ukuqhekeka ngenxa yokuncipha ngesikhathi senqubo yokuqina, okuthinta ikhwalithi yephrojekthi. I-HPMC ingalungisa ukucindezeleka kwangaphakathi kwe-mortar futhi inciphise izinga lokuncipha. Ngesikhathi esifanayo, ngokuthuthukisa ukuguquguquka kwe-mortar, inokumelana okungcono kokuqhekeka ngaphansi kokushintsha kwezinga lokushisa noma ukucindezeleka kwangaphandle, ngaleyo ndlela ithuthukise ukuqina.

2.6 Thinta isikhathi sokusetha uthayela

I-HPMC ithinta isikhathi sokusetha udoti ngokulungisa ijubane lokusabela kokumanzisa usimende. Inani elifanele le-HPMC lingandisa isikhathi sokwakha udoti futhi liqinisekise isikhathi esanele sokulungisa ngesikhathi senqubo yokwakha, kodwa ukusetshenziswa ngokweqile kungandisa isikhathi sokusetha futhi kuthinte inqubekela phambili yephrojekthi, ngakho-ke umthamo kufanele ulawulwe ngokufanele.

3. Umphumela womthamo we-HPMC ekusebenzeni kodaka

Umthamo we-HPMC ku-mortar ngokuvamile uphansi, ngokuvamile uphakathi kuka-0.1% no-0.5%. Umthamo othize uncike ohlotsheni lwe-mortar kanye nezidingo zokwakha.:

Isilinganiso esiphansi (≤0.1%): Kungathuthukisa ukugcinwa kwamanzi futhi kuthuthukise ukusebenza kahle kwe-mortar, kodwa umphumela wokujiya ubuthakathaka.

Isilinganiso esimaphakathi (0.1%~0.3%): Sithuthukisa kakhulu ukugcinwa kwamanzi, ukunamathela kanye nekhono lokulwa nokugoba kwe-mortar futhi sithuthukisa ukusebenza kokwakhiwa.

Isilinganiso esiphezulu (≥0.3%): Sizokwandisa kakhulu ukujiya kwe-mortar, kodwa singathinta ukugeleza kwamanzi, sandise isikhathi sokusetha, futhi singabi sihle ekwakhiweni.

Njengesengezo esibalulekile se-mortar,I-HPMCidlala indima ebalulekile ekuthuthukiseni ukugcinwa kwamanzi, ukuthuthukisa ukusebenza kokwakhiwa, ukuthuthukisa ukunamathela kanye nokumelana nokuqhekeka. Ukwengezwa okunengqondo kwe-HPMC kungathuthukisa kakhulu ukusebenza kwe-mortar iyonke futhi kuthuthukise ikhwalithi yephrojekthi. Ngesikhathi esifanayo, umthamo udinga ukulawulwa ukuze kugwenywe imiphumela emibi ekubekeni isikhathi kanye nokugeleza kokwakhiwa. Esikhathini esizayo, ngentuthuko eqhubekayo yemboni yokwakha, amathuba okusetshenziswa kwe-HPMC ezintweni zokwakha ezintsha eziluhlaza azoba banzi.