I-Hydroxypropyl methylcellulose HPMC ingathuthukisa kakhulu ukugcinwa kwamanzi kwe-mortar. Uma inani lokwengeza lingu-0.02%, izinga lokugcina amanzi lizokhushulwa lisuka ku-83% liye ku-88%; inani lokwengeza lingu-0.2%, izinga lokugcina amanzi lingu-97%. Ngesikhathi esifanayo, inani elincane le-HPMC liphinde linciphise kakhulu izinga lokuqhekeka kanye nokopha kwe-mortar, okubonisa ukuthi i-HPMC ayikwazi nje ukuthuthukisa ukugcinwa kwamanzi kwe-mortar, kodwa futhi ithuthukisa kakhulu ukuhlangana kwe-mortar, okuzuzisa kakhulu ukufana kwekhwalithi yokwakha i-mortar.
Kodwa-ke, i-hydroxypropyl methylcellulose HPMC inomthelela omubi emandleni okuguquguquka kanye namandla okucindezela kodaka. Ngokukhuphuka kwenani lokwengeza le-HPMC, amandla okuguquguquka kanye namandla okucindezela kodaka kwehla kancane kancane. Ngesikhathi esifanayo, i-HPMC ingandisa amandla okucindezela kodaka. Uma inani le-HPMC lingaphansi kuka-0.1%, amandla okucindezela kodaka ayanda ngokwanda komthamo we-HPMC. Uma inani lidlula u-0.1%, amandla okucindezela ngeke akhule kakhulu. I-Hydroxypropyl Methyl
I-Cellulose HPMC iphinde ikhulise amandla esibopho se-mortar. I-0.2% HPMC ikhulise amandla esibopho se-mortar kusuka ku-0.72 MPa kuya ku-1.16 MPa.
Izifundo zikhombisile ukuthi i-HPMC ingandisa kakhulu isikhathi sokuvula kwe-mortar, ukuze inani le-mortar eliwayo linciphe kakhulu, okuzuzisa kakhulu ekwakhiweni kwe-tile bonding. Uma i-HPMC ingaxutshwanga, amandla e-bond ye-mortar ancipha kusuka ku-0.72 MPa kuya ku-0.54 MPa ngemva kwemizuzu engama-20, kanti amandla e-bond ye-mortar ene-0.05% kanye ne-0.1% HPMC azoba yi-0.8 MPa kanye ne-0.84 MPa ngemva kwemizuzu engama-20. Uma i-HPMC ingaxutshwanga, ukushelela kwe-mortar kungu-5.5mm. Ngokukhula kokuqukethwe kwe-HPMC, ukushelela kuzoncipha njalo. Uma umthamo ungu-0.2%, ukushelela kwe-mortar kuncishiswa kube ngu-2.1mm.
Isikhathi sokuthunyelwe: Mashi-03-2022