Umphumela we-hemc hydroxyyethyllylyl methyl cellulose ku-perment hydration

I-Hemc (HydroxYethyl Methyl celtule Idlala indima ikakhulukazi ekwenzeni ngcono uketshezi lwe-cament paste nokubambezela ukusabela kwesimende se-hyment. Enqubeni ye-hydration ka usimende, i-hemc inethonya elithile ekuphenduleni kwe-hydration kanye nokwenza usimende.

1. Izici eziyisisekelo ze-hemc
I-Hemc iyi-polymer eyakhiwe ngokuguqulwa kwamakhemikhali kwe-cellulose yemvelo. Isakhiwo saso samangqamuzana siqukethe ukufakwa esikhundleni okubili, i-hydroxyyethyl ne-methyl, okwenza kube ne-solubity enhle, ikhono lokulungiswa kwe-viscosity kanye nezakhiwo ezenziwe ngefilimu. Njengokuhlanganiswa kosimende, i-hemc ingathuthukisa ukwisimo sayo, ukusebenza kokwakha, nokusebenza ku-Cement Paste, futhi ingathuthukisa amandla nokuqina ngemuva kokuqina ngezinga elithile.

2. Umphumela we-hemc kwinqubo ye-cement hydration
UCement Hydration yinqubo yokusabela kuka usimende kanye nokusabela kwamanzi. Ngalesi sabela, unamathisela usimende kancane kancane wenza i-matrix eqinile kasimende. Njengomuntu ophikisayo, i-hemc ingadlala izindima ezahlukahlukene kwinqubo yesimende ye-hydration. Imiphumela ekhethekile imi kanjena:

2.1 Ukuthuthukisa uketshezi lwe-slurry kasimende
Esesigabeni sokuqala se-yment hydration, uketshezi lwe-slurry kasimende lumpofu, olungathinteka ngesikhathi sokwakha. I-Hemc ingathuthukisa ngempumelelo uketshezi lwe-slurry kasimende ngenxa yokubonakala kwayo okuphezulu kanye ne-solubity yamanzi amahle. Ihlakaza izinhlayiyana zikakonisi futhi inciphise okuhlangene phakathi kwezinhlayiya kasimende, ngaleyo ndlela yenza ngcono ukuvumelana kwe-slurry kasimende, okwenza kube lula ukusebenza futhi uthele ngesikhathi sokwakha.

2.2 Ukubambezela ukusabela kukaCement Hydration
Iqembu le-hydroxyethyl ku-hemc line-hydrophility eqinile. Kungakha ifilimu ye-hydration ebusweni bezinhlayiya zokwenza usimende, yehlisa ijubane lokuxhumana phakathi kwezinhlayiya zosekhukhwini namanzi, ngaleyo ndlela kubambezele inqubo ye-hydration ka usimende. Lo mphumela wokulibazisa ubaluleke kakhulu ekushiseni okuphezulu noma kwakhiwa ngokushesha. Kungavimbela ukuthuthukiswa kwamandla okungalingani okubangelwa yi-hydration ngokweqile kasimende, futhi kungandisa isikhathi sokwakha ukugwema izinkinga zokuqala zokomisa.

2.3 Ukwenza ngcono ukuqina kwesikhumba sikasimende
Ngesikhathi senqubo ye-hydration ye-Cement Slurry, i-hemc ingathuthukisa ngempumelelo ukuqina kwe-slurry. Amaqembu we-hydroxyethyl kanye ne-methyl molecule e-hemc angasebenzisana nezinhlayiya zosekhukhwini ngokusebenzisa ama-hydrogen bond kanye namabutho we-van der Waals ukwakha isakhiwo sokunamathisela ozinzile. Lokhu kuzinza kusiza ukuvikela ukuhlukaniswa kokonakala usimende, ngaleyo ndlela kuthuthukise ukufana kwesimende unamathisela usimende kanye nokuqinisekisa ukuqina kwenqubo ye-hycration.

2.4 Ukuthuthukisa i-MicrossCruction yemikhiqizo ye-Cement Hydration
I-Hemc ingathuthukisa i-miscrumple yemikhiqizo ye-Cement Hydration ngokulungisa uketshezi nokuvunywa kukasimende unamathisele. Isibonelo, esigabeni sakamuva se-Conment Hydration, i-hemc ingathinta ukwakheka kanye nokusatshalaliswa kwemikhiqizo ye-hydration ku-calcium siling (Csh) i-hydrate (Csh). Ngesikhathi senqubo ye-Cement Hydration, ukwakheka kwe-Csh Gel kuyinto ebalulekile ekunqumeni amandla nokuqina kukasimende. I-Hemc ingakhuthaza ukusatshalaliswa komfaniswano we-Csh Gel futhi ithuthukise ubuntu namandla kasimende ngokulungisa ukuqondiswa kwe-Ion ku-Chem Hydration Reaction.

I-2.5 effect emandleni kasimende
Umphumela we-hemc kumandla kasimende uhlobene kakhulu nenqubo ye-Cement Hydration. Esesigabeni sokuqala se-yment hydration, amandla okuqala kasimende angancipha kancane ngenxa yomphumela wokubuyisa we-hemc. Kodwa-ke, njengoba ukusabela kwesimende kwe-hydration kuyaqhubeka, i-hemc ingasiza ekwakhekeni kwesakhiwo somakhale, ngaleyo ndlela yenza ngcono amandla okugcina kasimende ngesikhathi sokwelapha isikhathi eside. Ngaphezu kwalokho, i-hemc ingathuthukisa ukumelana nosimende, ithuthukise ukungapheleli kwesakhiwo sosimende, futhi ithuthukise ukuqina kukasimende.

3. Eminye imiphumela ye-hemc ku usimende
Ngaphezu kwemiphumela eshiwo ngenhla kwinqubo ye-Cement Hydration, i-hemc nayo inemiphumela ethile kwezinye izakhiwo zikasimende, ikakhulukazi kufaka phakathi:

3.1 Ukwenza ngcono ukumelana nesithwathwa kanye nokungaphelele kukasimende
I-Hemc ingathuthukisa i-miscruction ka usimende, ukuze ikwazi ukukhiqiza i-matrix ye-denser centmer ngesikhathi senqubo ye-hydration. Lesi sakhiwo esiminyene singanciphisa ngempumelelo i-porosity ngaphakathi kosesimende, ngaleyo ndlela sithuthukise ukumelana nesithwathwa kanye nokungaphelele kukasimende. Ngaphansi kwezimo zesimo sezulu esibi kakhulu, ukumelana nesithwathwa nokungaphezu kokungapheli kosimende isakhiwo kubalulekile ekuzinzisweni kwesikhathi eside kwezakhiwo.

3.2 Ngcono ukumelana nokuqina kukakhonkolo
Njengoba i-hemc ithuthukisa ubuntu bokunamathisela kosimende, inganciphisa ngempumelelo ubukhona be-pores ngaphakathi kosimende, yehlisa ukungena kwamanzi, igesi noma amakhemikhali, futhi ngaleyo ndlela kuthuthukise ukumelana nokhonkolo. Ikakhulu ezindaweni ezithile ezinomswakama noma ze-acid-base, i-hemc ingasiza ukunweba impilo yenkonzo yezakhiwo zomasimende.

4. Inani nomphumela we-hemc
Umphumela wenani le-hemc kwinqubo yesimende ye-hydration yinto ebalulekile. Ngokuvamile, inani le-hemc elingeziwe kufanele lishintshwe ngokuya ngezidingo zangempela. I-hemc eningi kakhulu ingadala ukuba i-slurry kasimende ibe nokuvumelana okuphezulu futhi kuthinte ukusebenza kokwakha; Ngenkathi ukwengezwa okunganele kungenzeka kungadlali ngokuphelele iqhaza ekuthuthukiseni ukusebenza kukasimende. Imvamisa, inani le-hemc elingezwe ku-CEUNT lingu-0.2% kuya ku-1.0% (ngesisindo sikasimende), kanye nenani elithile elisetshenzisiwe kufanele linqunywe ngokuya ngezinhlobo ezihlukile zosekhule nezindawo ezisetshenzisiwe.

Njengokuphikisana nokonga, i-hemc idlala indima ebalulekile ekwenzeni ngcono uketshezi lwe-slurry kasimende, ukubambezela inqubo ye-hydration, kanye nokwenza ngcono i-miscream namandla kasimende. Ukusetshenziswa okunengqondo kwe-hemc kungathuthukisa ukusebenza kukasimende kuze kube sezingeni elithile, ikakhulukazi ekwenzeni ngcono ukusebenziseka kuka usimende, ukunweba isikhathi sokusebenza, kanye nokwenza ukuqinisa amandla nokuqina kukakhonkolo oqinile. Kodwa-ke, inani le-hemc elisetshenzisiwe lidinga ukulungiswa ngokuya ngemibandela yangempela ukuze kuqinisekiswe ukusebenza kwayo okuhle. Emisebenzini yokwakha, ukusetshenziswa kwe-hemc kuzosiza ukuthuthukisa ikhwalithi nokuqina kwemikhiqizo kasimende.