Umphumela we-HPMC ezinhlotsheni ezihlukile kasimende

I-Hydroxypropyl Methylcellulose (HPMC) iyingxenye ye-polymer engenawona yamanzi engenawona, evame ukusetshenziswa ezintweni zokwakha, ikakhulukazi ekuguqulweni kwezinto zokwenziwa ngosimende. I-HPMC inama-adhesion amahle, ukugcinwa kwamanzi, ukwakheka kwefilimu nokuhlakazwa, ngakho-ke kusetshenziswa kabanzi ezintweni zokwakha ezifana nokwenza usimende, inani lezinhlobo ze-HPMC liyahlukahluka ngokuya ngezindawo zokwenza usimende, inani lokungezwa kanye nemibandela yokusebenzisa.

1. Izici eziyisisekelo nemisebenzi ye-HPMC
Njengomfashini ku-CEUNT, i-HPMC ikakhulukazi ithinta ukusebenza kukasimende ngezinqubo ezilandelayo:

Ukugcinwa kwamanzi: I-HPMC ingabambezela ngempumelelo ukuhwamuka kwamanzi ku-Cement Paste, ngaleyo ndlela sinwebe isikhathi sokwakha sikasimende futhi sigweme ukuqhekeka kokuqala okubangelwa ukuguquguquka kwamanzi ngokweqile.
Umphumela Wokuqina
Ukwenza ngcono i-RHEOLOGY: I-HPMC ingaguqula izakhiwo zesimbozo sikamatimu kasimende, okwenza kube ne-fluodity kanye nezakhiwo zokwakha, nokugwema ukuhlanganiswa okungalingani ngesikhathi sokwakha.
Impahla elwa nokuhlanza: Ngenxa yezimpawu zezokwakheka zamangqamuzana ze-HPMC, kuyasiza ukuthuthukisa ukuqina kwe-slurry futhi kuvikele ukunqunyelwa kwezinhlayiya eziqinile ku-slurry kasimende.

2. Umphumela we-HPMC ezinhlotsheni ezahlukahlukene zikasimende
(1) usimende ojwayelekile wePortland Centembe (OPC)
Usimende ojwayelekile wePortland usimende uhlobo olusetshenziswa kakhulu usimende. Iqhaza le-HPMC kulo likhonjiswa ikakhulukazi ezicini ezilandelayo:

Ukwenza ngcono umsebenzi: lapho usebenzisa i-OPC, inani elithile lamanzi livame ukungezwa. I-HPMC ingathuthukisa izakhiwo zayo ezimbozweni kanye nokuqina kwe-slurry ngokuqina, ngaleyo ndlela kuvinjelwe i-slurry eyeqile ekuhambeni ngokweqile noma ukomisa ngokushesha okukhulu ngesikhathi sokwakha.
Ukubambezela isikhathi sokusetha kokuqala: I-HPMC ingabambezela isikhathi sokusetha usimende futhi ivikele usimende kusuka ekuhleleni kakhulu. Ilungele ikakhulukazi ukwakhiwa okungamazinga amakhulu noma izindawo eziphakeme zokushisa.
Ukuthuthukisa Ukugcinwa Kwamanzi: I-HPMC ithuthukisa ukugcinwa kwamanzi kasimende slurry, ukuvimbela amanzi ukuthi avele ngokushesha ngesikhathi senqubo yokwelapha, ngaleyo ndlela athuthukise ukuthuthukiswa kwamandla kasimende.

(2) usimende ophakeme we-alumina
Ngenxa yesilinganiso esiphakeme samaminerali aqabulayo ekwakhiweni kwawo kwamakhemikhali, usimende omkhulu we-alumina unokwanda kwamandla ngokushesha ngemuva kokuqina. Kodwa-ke, ngenxa yokushisa okuphezulu kwe-hydration ye-High-Alumina Cement, imifantu nezinye izinkinga zivame ukwenzeka ngesikhathi sokwakha. Ukungezwa kwe-HPMC kungathuthukisa ngempumelelo izakhiwo zayo ezilandelayo:

Ukubambezela ukusabela kwe-hydration: I-HPMC ingabambezela ukusabela kuka-hydration ka usimende, ikakhulukazi ekuqaleni kwesikhundla esiphakeme, ukunciphisa ukushisa kwayo kwe-hydration futhi kuvikele imifantu.

Ukwenza ngcono i-fluidity: unamathisela usimende we-alumina cender ephezulu unobungozi obungebumpofu. I-HPMC isiza ukuthuthukisa ububi kanye nokufana ngesikhathi sokwakha ngokwanda kwe-viscosity kanye nokwenza ngcono ukuqina kwe-passe.

Ukuthuthukisa ukumelana nokuqhekeka: Ukugcinwa kwamanzi kwe-HPMC kuthuthukisa izimo zelapha uCent-Alumina Cement futhi zigwema ukuqhekeka okubangelwa ukuhwamuka ngokweqile kwamanzi.

(3) usimende omhlophe
Usimende omhlophe uvame ukusetshenziswa ezakhiweni zokuhlobisa nezakhiwo ezikhethekile ezisebenzayo. Imiphumela eyinhloko ye-HPMC ku-White Cement yile:

Ukuthuthukisa ukunxusa kanye nokumelana kwamanzi: I-HPMC ingakhuphula amandla okunamathela ngokosisi omhlophe, ikakhulukazi endaweni enomswakama. Usimende omhlophe uvame ukusetshenziswa embonweni odongeni lwangaphandle nezinto zokuhlobisa eziphezulu. Ukungezwa kwe-HPMC kungathuthukisa ngempumelelo ukumelana kwamanzi kanye nokumelana nesimo sezulu.
Ukwenza ngcono ukusebenza kwe-fluidity kanye nokwenza umsebenzi wokwakha: usimende omhlophe udinga ukulingana okuphezulu nobunye ngesikhathi sokwakha. I-HPMC ingathuthukisa ukufana kwe-slurry, gwema ukungalingani kokomusi omhlophe ngesikhathi sokwakha, futhi uqinisekise ukuthobeka kwenhlanganisela.

(4) usimende onzima ngokuqinile
Usimende olwandayo osheshayo une-hydration esheshayo futhi ulungele amaphrojekthi adinga ukwakhiwa okusheshayo. Ukusetshenziswa kwe-HPMC ku-Rapid Harding Cement kuboniswa ikakhulukazi:

Ukubambezela isikhathi sokusetha: I-hydrate esheshayo yokushiswa kosimende-okulondoloziwe kungaholela ekuhlelweni ngaphambi kwesikhathi, ngenkathi i-HPMC ingabambezela ngempumelelo isikhathi sokusetha usimende, iqinisekise ukuthi ukwakhiwa kuphothulwa ngesikhathi esifushane.
Ukulungisa isilinganiso se-hydration: I-HPMC ingaguqula isilinganiso se-Cydy Hydration ngokwenza ngcono ukubonakala kanye ne-bheological Properties ye-slurry yekhonkolo, okwenza kube nezimo eziguquguqukayo ngokwengeziwe ngezidingo ezahlukahlukene zokwakha.
Thuthukisa Ukulawulwa Kwesikhathi Sokwakha: Ukusetshenziswa kwe-HPMC kunganweba isikhathi esivulekile sikasimende, ukunikeza abasebenzi abazokwakha isikhathi sokwenza izinguquko nokwakha.

(5) usimende ophansi wokushisa
Usimende oshisa kancane uvame ukusetshenziswa kumaphrojekthi wokhonkolo omkhulu wevolumu ukunciphisa ukushisa okukhishwe ngesikhathi sokushisa ngosimende. Iqhaza le-HPMC emanzini aphansi lifaka:
Ukunciphisa ukushisa kwe-hydration: usimende oshisa kancane uvame ukusetshenziswa ezimweni lapho ukushisa kwe-hydration kudinga ukulawulwa khona. I-HPMC ingalawula ngempumelelo u-fluidity kasimende unamathisele futhi yehlise ukunqwabelana kokushisa kwe-hydration yokuqala, ngaleyo ndlela ugweme ukukhiqizwa kwezinga lokushisa lokushisa.
Ukuthuthukisa ukugcinwa kwamanzi kasimende: Njengoba usimende ophansi wokushisa uvame ukusetshenziselwa ukuthulula ivolumu enkulu, ukugcinwa kwamanzi kwe-HPMC kungagcina ukunamathisela usimende futhi ukhuthaze ukukhula okufanayo kwamandla kasimende.

I-3. Ukuqapha ekusetshenzisweni kwe-HPMC
Yize i-HPMC isebenza kahle ku-Cement, ukusetshenziswa kwayo kusadinga ukucubungula lezi zinto ezilandelayo:

Ukulawulwa kwemithamo: Inani lezidingo ze-HPMC ezingeziwe ukuze zilungiswe ngohlobo lukasimende kanye nezidingo zangempela. Uma kufakwa okuningi kakhulu, kungathinta amandla nokuqina kukasimende; Uma kuncane kakhulu kungezwa, ukusebenza kwawo kungenzeka kungabikwa ngokuphelele.
Ukuvumelana namanye ama-admixtures: I-HPMC ingasebenzisana nama-admixtures athile (njengama-admixtures athile, ama-ejenti wamanzi, njll.), Ngakho-ke ukusebenza kwefomula kuyadingeka.
Izimo Zokugcina Usimende: Ukusebenza kwe-HPMC ku-Cement kuyathinteka kwimvelo yokugcina usimende. Ngakho-ke, ekwakhiweni kwangempela, ukunakwa kufanele kukhokhwe kwizimo zesitoreji sikasimende ukuvikela ukwehluleka ngaphambi kwesikhathi sikakhonkolo.

Njengomfashini wesimende, i-HPMC idlala indima ebalulekile ezinhlotsheni ezahlukahlukene zikasimende. Kungathuthukisa kakhulu ukusebenza kokwakha kanye nekhwalithi yokugcina yesimende ngokwenza ngcono uketshezi, ukubambezela isikhathi sokusetha, kanye nokwenza ukulondolozwa kwamanzi. Ngokwesici sezinhlobonhlobo zosekhulekile, ukukhetha okuvumelekile kwenani lokungezwa kanye nendlela yokusebenzisa i-HPMC ingangeza kangcono ukusebenza kukakhonkolo futhi ihlangabezane nezidingo ezahlukahlukene zokwakha.