Hydroxypropyl methyl cellulose
Ịtọ oge ule
The mwube oge nke ihe bụ tumadi metụtara ntọala oge nke ciment, mkpokọta mmetụta adịghị nnukwu, otú ahụ ntọala oge nke ngwa agha ike ga-eji n'ọnọdụ nke ọmụmụ nke HPMC n'okpuru mmiri na-abụghị dispersion ihe ntọala oge, mmetụta nke ngwakọta n'ihi na mwube oge site na mmiri-ciment ruru nke ngwa agha, ciment ájá ruru mmetụta, otú iji nyochaa HPMC na mmiri-ntọala oge nke mortar-mwube ruru, na simenti-mmetụta oge nke mortar. kwesịrị idozi.
HPMC bụ usoro ahịrị linear macromolecule, yana otu hydroxyl na otu arụ ọrụ, nke nwere ike ịmepụta njikọ hydrogen na ngwakọta mmiri na-agwakọta ma mee ka viscosity nke mmiri agwakọta. HPMC ogologo molekul chains ga-adọta ibe ha, nke mere na HPMC ụmụ irighiri intertwine na ibe ha na-etolite a netwọk Ọdịdị, na ciment, agwakọta mmiri ọbọp. N'ihi na HPMC na-etolite usoro netwọkụ dị ka ihe nkiri dị mkpa na mmechi nke ciment, ọ ga-egbochi ikuku mmiri na ngwa ngwa, gbochie ma ọ bụ belata ọnụego hydration nke ciment.
Nnwale ịwụfu mmiri
The mmiri-ọbara onu onu nke ngwa agha yiri nke ihe, nke ga-eme ka oké njọ mkpokọta mmezi, na-eduga na-abawanye nke mmiri-ciment ruru nke n'elu oyi akwa nke slurry, na-eme ka elu oyi akwa nke slurry nwere nnukwu plastic shrinkage ma ọ bụ ọbụna cracking na mmalite ogbo, na ike nke elu oyi akwa nke slurry dịtụ adịghị ike. Site na nnwale ahụ, enwere ike ịhụ na mgbe ọnụọgụ ngwakọta dị n'elu 0.5%, ọ dịghị ihe ọ bụla na-agbapụta mmiri. Nke a bụ n'ihi na mgbeHPMCna-agwakọta n'ime ngwa agha, HPMC nwere film e guzobere na netwọk Ọdịdị, nakwa dị ka adsorption nke hydroxyl na ogologo yinye nke macromolecules, nke mere na ciment na ngwa agha na Ịgwakọta mmiri etolite flocculation, iji hụ na ike Ọdịdị nke ngwa agha ahu. Ka ịgbakwunye HPMC na ngwa agha ọzọ, a ga-emepụta ọtụtụ obere egosipụta onwe ha. A ga-ekesa afụ ndị a n'otu n'otu na ngwa ngwa ma gbochie ntinye nke mkpokọta. HPMC na oru arụmọrụ nke ciment dabeere ihe na-enwe mmetụta dị ukwuu, mgbe a na-eji kwadebe dị ka akọrọ ngwa agha, polymer ngwa agha na ndị ọzọ ọhụrụ ciment dabeere mejupụtara ihe, nke mere na ọ nwere ezi mmiri njide, plasticity.
Oge nzipu: Eprel-26-2024