Hydroxypropyl methylcellulose (HPMC)bụ polima na-agbaze mmiri nke a na-ejikarị eme ihe ụlọ. A na-eji ya eme ihe na ngwa ngwa ciment, ntụ ntụ ntụ, nrapado tile na ngwaahịa ndị ọzọ. HPMC na-eme ka ihe ndị sitere na ciment dịkwuo mma site n'ịbawanye viscosity nke usoro ahụ, na-eme ka ikike njigide mmiri dịkwuo mma na imezi arụmọrụ ụlọ.
1. Mmetụta nke HPMC na njide mmiri nke ciment mortar
Njide mmiri nke ụrọ ciment na-ezo aka n'ikike nke ngwa agha iji jide mmiri tupu ọ sie ike kpamkpam. Njide mmiri dị mma na-enyere aka zuru oke hydration nke ciment ma gbochie mgbawa na ike na-efunahụ nke oke mmiri na-efunahụ. HPMC na-eme ka njigide mmiri simenti dị n'ụzọ ndị a:
Mụbaa viscosity sistemu
Mgbe HPMC gbazere na ngwa ngwa ciment, ọ na-etolite nhazi ntupu otu, na-abawanye viscosity nke ngwa agha ahụ, na-ekesa mmiri n'ime ngwa agha ahụ ma belata mfu nke mmiri efu, si otú ahụ na-eme ka njide mmiri dịkwuo mma. Njirimara a dị mkpa karịsịa maka ụlọ okpomọkụ dị elu n'oge okpomọkụ ma ọ bụ maka isi ala na ntinye mmiri siri ike.
Ịme ihe mgbochi mmiri
Mkpụrụ ndụ HPMC nwere mmịnye mmiri siri ike, ihe ngwọta ya nwere ike mepụta ihe nkiri hydration gburugburu irighiri ciment, nke na-ekere òkè n'imechichi mmiri ma na-ebelata ọnụego nke evaporation mmiri na absorption. Ihe nkiri mmiri a nwere ike idowe nguzozi mmiri n'ime ngwa agha ahụ, na-ekwe ka mmeghachi omume hydration ciment na-aga n'ihu nke ọma.
Belata ọbara ọgbụgba
HPMC nwere ike ibelata ọbara ọgbụgba nke ngwa agha nke ọma, ya bụ, nsogbu nke mmiri na-esi na ngwa agha na-asọpụta ma na-ese n'elu elu mgbe agwakọtara ngwa agha ahụ. Site n'ịbawanye viscosity na elu esemokwu nke aqueous ngwọta, HPMC nwere ike igbochi Mbugharị nke Ịgwakọta mmiri na ngwa agha, hụ na edo nkesa nke mmiri n'oge ciment hydration usoro, na si otú welie n'ozuzu uniformity na kwụsie ike nke ngwa agha.
2. Mmetụta nke HPMC na nhazi nke ngwa ngwa ciment
Ọrụ HPMC na ngwa ngwa ciment ejedebeghị na njide mmiri, kamakwa ọ na-emetụta ihe mejupụtara ya na arụmọrụ ya, dị ka egosiri n'okpuru:
Na-emetụta usoro hydration ciment
Mgbakwunye nke HPMC ga-ebelata ọnụ ọgụgụ hydration nke ciment hydration n'oge mmalite, na-eme ka usoro nhazi nke ngwaahịa hydration dịkwuo mma, nke na-eme ka densification nke ngwa agha ahụ dị. Mmetụta a na-egbu oge nwere ike ibelata mgbawa n'oge ma melite nguzogide mgbape nke ngwa agha ahụ.
Na-edozi rheological Njirimara nke ngwa agha
Mgbe agbazechara, HPMC nwere ike ịbawanye plasticity na ịrụ ọrụ nke ngwa agha, na-eme ka ọ dị nro mgbe a na-etinye ya n'ọrụ ma ọ bụ n'itinye, na-adịkarịghị enwe ike ịgba ọbara na nkewa. N'otu oge ahụ, HPMC nwere ike inye ngwa agha ụfọdụ thixotropy, nke mere na ọ na-ejigide viscosity dị elu mgbe ọ na-eguzo, na mmiri na-eme ka ọ dịkwuo mma n'okpuru ọrụ nke ike ịkwa akwa, nke na-enye aka maka ọrụ owuwu.
Na-emetụta ike mmepe nke ngwa agha
Ọ bụ ezie na HPMC na-eme ka arụrụ ọrụ nke ngwa agha dịkwuo mma, ọ nwekwara ike inwe mmetụta ụfọdụ na ike ikpeazụ ya. Ebe HPMC ga-emepụta ihe nkiri na ngwa ngwa ciment, ọ nwere ike igbu oge nhazi ngwaahịa hydration n'oge dị mkpirikpi, na-eme ka ike mmalite belata. Otú ọ dị, ka hydration ciment na-aga n'ihu, mmiri nke HPMC na-ejide nwere ike ịkwalite mmeghachi omume hydration na-esote, ka ike ikpeazụ nwee ike imeziwanye.
Dị ka ihe mgbakwunye dị mkpa maka ngwa ngwa ciment,HPMCnwere ike melite njigide mmiri nke ngwa agha nke ọma, belata mmiri na-efunahụ, melite arụmọrụ ụlọ, ma na-emetụta usoro hydration ciment ruo n'ókè ụfọdụ. Site n'ịgbanwe usoro onunu ogwu nke HPMC, enwere ike ịchọta nguzozi kachasị mma n'etiti njigide mmiri, ịrụ ọrụ na ike iji gboo mkpa nke ngwa ngwa dị iche iche. N'ọrụ ihe owuwu, iji HPMC eme ihe n'ụzọ ezi uche dị na ya dị oke mkpa iji melite ogo ngwa agha yana ịgbatị ogologo oge.
Oge nzipu: Mar-25-2025