Isiphumo seHydroxypropyl Methyl Cellulose HPMC kwixesha lokuSeta leConcrete

Ixesha lokumisela ikhonkrithi lihambelana kakhulu nexesha lokumisa i-samente, kwaye impembelelo ye-aggregate ayinkulu. Ngoko ke, umphumo we-hydroxypropyl methylcellulose HPMC ngexesha lokumisela umxube wekhonkrithi ongaphantsi kwamanzi ongenakuhlakazeka unokufundwa ngexesha lokumisela udaka. Ekubeni ixesha lokumisa lomdaka lichaphazeleka ngamanzi, ukwenzela ukuvavanya umphumo we-HPMC ngexesha lokumisela udaka, umlinganiselo wamanzi-samente kunye nodaka lodaka kufuneka lulungiswe.

Iziphumo zovavanyo zibonisa ukuba ukongezwa kwe-hydroxypropyl methylcellulose HPMC kunempembelelo enkulu yokunciphisa umxube wodaka, kwaye ixesha lokumisela lodaka lide kunye nokunyuka kwenani le-hydroxypropyl methylcellulose. Kwimeko yomxholo ofanayo we-HPMC, udaka olwenziwe phantsi kwamanzi lungcono kunodaka olwenziwe emoyeni. Ukubumba okuphakathi kuthatha ixesha elide ukusetwa. Xa kulinganiswa emanzini, xa kuthelekiswa nomfanekiso ongenanto, ixesha lokuqala lokumisela udaka oluxutywe ne-hydroxypropyl methylcellulose lwalibaziseka ngeeyure ze-6-18, kwaye ixesha lokugqibela lokumisela libambezelekile ngeeyure ze-6-22. Ke ngoko, i-HPMC kufuneka isetyenziswe ngokudibeneyo kunye neearhente zamandla zakuqala.

I-HPMC yi-polymer ephezulu ye-molecular ene-macromolecular linear structure. Iqela lalo elisebenzayo linamaqela e-hydroxyl, anokwenza iibhondi ze-hydrogen kunye neemolekyuli zamanzi ezixutywe kunye nokwandisa i-viscosity yamanzi adibeneyo. Amatyathanga eemolekyuli amade e-HPMC aya kutsala omnye komnye, enze iimolekyuli ze-HPMC ezidityanisiweyo zenze ulwakhiwo lothungelwano, ukusonga isamente kunye nokuxuba amanzi. Ekubeni i-HPMC isenza ifilim-efana nesakhiwo sothungelwano sokusonga isamente, inokuthintela ngokufanelekileyo ukuguquguquka kwamanzi kudaka, kwaye ithintele okanye icothise isantya se-hydration yesamente.