I-ether yeseliinokuphucula kakhulu ukusebenza kwe-mortar emanzi, kwaye sisongezelelo esiphambili esichaphazela ukusebenza kokwakhiwa kwe-mortar. Ukukhetha ngokufanelekileyo ii-ether ze-cellulose zeentlobo ezahlukeneyo, i-viscosities ezahlukeneyo, ubungakanani bee-particle ezahlukeneyo, amanqanaba ahlukeneyo e-viscosity kunye nobungakanani obongezelelweyo kuya kuba nefuthe elihle ekuphuculeni ukusebenza kwe-mortar eyomileyo.
Kukwakho nolwalamano oluhle oluhambelanayo phakathi kokungqinelana kwe-cement paste kunye nomlinganiselo we-cellulose ether. I-Cellulose ether inokunyusa kakhulu i-viscosity ye-mortar. Okukhona umthamo umkhulu, kokukhona umphumo ubonakala ngakumbi. Isisombululo samanzi se-cellulose ether esine-viscosity ephezulu sine-thixotropy ephezulu, nto leyo ekwaluphawu oluphambili lwe-cellulose ether.
Isiphumo sokutyeba sixhomekeke kwinqanaba lokupholimetha kwe-cellulose ether, uxinano lwesisombululo, izinga lokucheba, ubushushu kunye nezinye iimeko. Ipropati ye-gelling yesisombululo ikhethekile kwi-alkyl cellulose kunye ne-derivatives zayo eziguquliweyo. Iipropati ze-gelation zinxulumene nenqanaba lokutshintshwa, uxinano lwesisombululo kunye nezongezo. Kwi-hydroxyalkyl modified derivatives, iipropati ze-gel zikwanxulumene nenqanaba lokuguqulwa kwe-hydroxyalkyl. Isisombululo se-10%-15% sinokulungiselelwa i-MC ene-viscosity ephantsi kunye ne-HPMC, isisombululo se-5%-10% sinokulungiselelwa i-MC ene-viscosity ephakathi kunye ne-HPMC, kwaye isisombululo se-2%-3% sinokulungiselelwa kuphela i-MC ene-viscosity ephezulu kunye ne-HPMC. Ngokwesiqhelo udidi lwe-viscosity ye-cellulose ether lukwahlelwa ngesisombululo se-1%-2%.
Ubunzima obuphezulu beemolekyulii-cellulose etherinokusebenza okuphezulu kokutyeba. Iipolymers ezinee-molecular weights ezahlukeneyo zine-viscosities ezahlukeneyo kwisisombululo esifanayo sokutyeba. Iqondo eliphezulu. I-viscosity ekujoliswe kuyo inokufezekiswa kuphela ngokongeza inani elikhulu le-cellulose ether ephantsi kobunzima be-molecular. I-viscosity yayo ayixhomekekanga kakhulu kwisantya sokucheba, kwaye i-viscosity ephezulu ifikelela kwi-viscosity ekujoliswe kuyo, kwaye inani elifunekayo lokongeza lincinci, kwaye i-viscosity ixhomekeke ekusebenzeni kokutyeba. Ke ngoko, ukuze kufezekiswe ukuhambelana okuthile, inani elithile le-cellulose ether (uxinzelelo lwesisombululo) kunye ne-viscosity yesisombululo kufuneka kuqinisekiswe. Ubushushu be-gel yesisombululo buyancipha ngokuthe ngqo ngokunyuka koxinzelelo lwesisombululo, kunye nee-gels kubushushu begumbi emva kokufikelela kuxinzelelo oluthile. I-gelling concentration ye-HPMC iphezulu kakhulu kubushushu begumbi.
Ixesha leposi: Epreli-28-2024