HPMC (hydroxypropyl methylcellulose)bụ cellulose a na-agbanwe agbanwe nke a na-ejikarị eme ihe ụlọ, karịsịa na ngwa agha. Dị ka ihe na-eme ka mmiri na-edozi mmiri polymer, HPMC nwere ike ọ bụghị nanị ịkwalite arụmọrụ nke ngwa agha, kamakwa na-arụ ọrụ dị mkpa na impermeability nke ngwa agha.
1. Ihe ndị bụ isi nke HPMC na ọrụ ya na ngwa agha
HPMC nwere mma mmiri solubility na ndim n'obi Njirimara. Ọ nwere ike ijikọta ya na mmiri iji mepụta ngwọta viscous iji meziwanye ọrụ nke ngwa agha. Ọrụ ndị HPMC na-arụ na ngwa agha gụnyere:
Imelite njide mmiri nke ngwa agha: HPMC nwere njide mmiri siri ike ma nwee ike belata ikuku mmiri nke ọma, si otú a na-edobe ngwa agha ahụ. Nke a na-enyere aka melite arụmọrụ nke ngwa agha, na-eme ka ọ dị mfe ịrụ ọrụ n'oge a na-ewu ụlọ, ma na-eme ka mmeghachi omume hydration nke ciment.
Ịkwalite adhesion na plasticity nke ngwa agha: HPMC nwere ike ime ka adhesion nke ngwa agha dịkwuo mma, welie adhesion ya na oyi akwa isi, ma zere ịwụfu ma ọ bụ mgbawa mgbe a na-ewu ya. N'otu oge ahụ, HPMC nwere ike imeziwanye plasticity nke ngwa agha, na-eme ka ọ dịkwuo mfe ịhazi ọdịdị ya n'oge a na-ewu ya.
Melite mgbape mgbape: Ebe ọ bụ na HPMC nwere ike ịbawanye ike njikọ na ike nke ngwa agha, ọ nwere ike melite mgbape mgbape nke ngwa agha ruo n'ókè ụfọdụ ma gbochie mgbawa nke ike mpụga ma ọ bụ mbelata.
2. Mmetụta nke HPMC na impermeability nke ngwa agha
Enweghi ike nke ngwa agha na-ezo aka na ikike ya iguzogide ntinye mmiri n'okpuru nrụgide mmiri. Enweghi ike nke ngwa agha na-emetụta ọtụtụ ihe, nke kachasị mkpa bụ nhazi nke pore, njupụta na ogo hydration nke ciment. HPMC na-eme ka ngwa agha ghara ịdị mfe n'akụkụ ndị a:
Melite microstructure nke ngwa agha
Enweghi ike ngwa ngwa nwere njikọ chiri anya na microstructure ya. Enwere akụkụ ụfọdụ nke pores na ngwa agha, nke bụ isi ọwa maka ntinye mmiri. Mgbakwunye nke HPMC nwere ike ibelata porosity site n'ịmepụta usoro dị mma. Kpọmkwem, HPMC nwere ike na-emekọ ihe na simenti irighiri na simenti ngwa agha, kwalite ciment hydration usoro, mee ka ciment mado ọzọ siri, ibelata guzobe nke nnukwu pores, ma si otú mma njupụta nke ngwa agha. N'ihi mbelata nke pores, ụzọ nke ịbanye mmiri na-adị ogologo, si otú a na-eme ka enweghị ike nke ngwa agha dịkwuo elu.
Meziwanye njide mmiri nke ngwa agha ma kwalite hydration ciment
Mmeghachi omume hydration nke ciment na-achọ mmiri zuru oke iji gaa n'ihu, na njedebe nke ciment hydration na-emetụta kpọmkwem ike na enweghị ike nke ngwa agha. HPMC nwere ike jiri nwayọ belata evaporation nke mmiri site na mmetụta njide mmiri ya, ka ngwa agha ahụ nwee ike idowe mmiri zuru oke n'oge a na-ewu ụlọ ma kwalite hydration nke ciment. N'oge usoro hydration ciment, a ga-emepụta nnukwu ngwaahịa hydration na mpempe ciment, nke na-ejupụta pores mbụ, na-eme ka njupụta nke ngwa agha dịkwuo mma, wee mee ka ọ dịkwuo mma.
Welie ike njikọ nke ngwa agha
HPMC nwere ike welie adhesion n'etiti ngwa agha na ala ala site na imeziwanye ike njikọ nke ngwa agha. Nke a nwere ike ịzenarị nsị mmiri nke mwụfu ngwa agha ma ọ bụ mgbawa na-akpata. Karịsịa n'akụkụ ụfọdụ ekpughere, ịkwalite ike njikọta nwere ike ibelata ụzọ ntinye mmiri nke ọma. Na mgbakwunye, njikọta nke HPMC ka mma nwekwara ike ime ka ngwa agha ahụ dịkwuo nro, na-ebelata ntinye mmiri.
Na-egbochi nhazi nke cracks
Nhazi nke cracks bụ ihe dị mkpa na-emetụta impermeability nke ngwa agha. Microcracks na ngwa agha bụ ọwa bụ isi maka ntinye mmiri. HPMC nwere ike ibelata nguzobe nke mgbawa site na imeziwanye ductility na mgbape mgbochi nke ngwa agha, ma gbochie mmiri ịbanye ngwa agha site na mgbawa. N'oge usoro ihe owuwu ahụ, HPMC nwere ike ibelata nsogbu mgbawa nke mgbanwe okpomọkụ na-akpata ma ọ bụ nzizi na-ezighi ezi nke elu ala, si otú ahụ na-eme ka ngwa ngwa ghara ịdị mma.
3. Ngwa nke HPMC na ngwa agha dị iche iche
Ụdị ngwa agha dị iche iche nwere ihe dị iche iche chọrọ maka enweghị ike, na mmetụta ngwa nke HPMC na ngwa agha ndị a dịkwa iche. Ọmụmaatụ:
Ngwunye plasta: A na-ejikarị plasta mee ihe dị ka ihe mkpuchi nke mpụta ihu ụlọ, ihe ndị ọ chọrọ adịghịkwa agwụ agwụ dị oke elu. Ngwa nke HPMC na plasta ngwa agha nwere ike melite mgbape eguzogide na impermeability nke ngwa agha, karịsịa na elu iru mmiri gburugburu, HPMC nwere ike n'ụzọ dị irè gbochie mmiri penetration na-eme ka ime mgbidi nke ụlọ akọrọ.
Ngwa ngwa mgbochi mmiri: Ọrụ bụ isi nke ngwa agha anaghị egbochi mmiri bụ igbochi ntinye mmiri, yabụ ihe ndị ọ chọrọ ka ọ bụrụ ihe siri ike karị. HPMC nwere ike imeziwanye njupụta nke ngwa agha anaghị egbochi mmiri nke ọma, na-abawanye ogo simenti hydration, wee si otú a kwalite arụmọrụ ngwa ngwa anaghị egbochi mmiri.
Ngwunye ala: mmiri nwere ike mebie ngwa ngwa n'oge a na-eji ogologo oge eme ihe, ọkachasị na mpaghara iru mmiri. HPMC nwere ike ịgbatị ndụ ngwa agha ụlọ site n'ịkwalite impermeability nke ngwa agha.
Dị ka mgbakwunye, HPMC nwere ike melite impermeability nke ngwa agha. Site na imeziwanye microstructure nke ngwa agha, na-eme ka njide mmiri ya dịkwuo mma, na-eme ka ike nke njikọ dịkwuo mma, na ịkwalite nguzogide mgbape;HPMCnwere ike ime ka ngwa agha etolite usoro kọmpat karịa, belata ụzọ ntinye mmiri, wee si otú a melite impermeability nke ngwa agha. N'ime ngwa bara uru, mgbakwunye HPMC nwere ike melite arụmọrụ nke ngwa agha ma gbasaa ndụ ọrụ nke ụlọ. Ya mere, HPMC nwere atụmanya ngwa sara mbara na ngwa dị iche iche dị ka mkpuchi mmiri, plasta na ngwa agha ala.
Oge nzipu: Jan-16-2025