Udaka oluxutyiweyo olumanzi: udaka oluxutyiweyo luhlobo lwesamente, i-aggregate encinci, umxube kunye namanzi, kwaye ngokweempawu zezinto ezahlukeneyo, ngokwesilinganiso esithile, emva kokuba ilinganiswe kwisikhululo sokuxuba, ixutywe, ithuthwe iye kwindawo apho ilori isetyenziswa khona, kwaye ingeniswe kwindawo ekhethekileyo. Gcina isitya kwaye usebenzise umxube omanzi ogqityiweyo ngexesha elichaziweyo.
I-Hydroxypropyl methylcellulose isetyenziswa njengesixhobo sokugcina amanzi kwi-samente mortar kunye ne-retarder yokupompa i-mortar. Kwimeko ye-gypsum njenge-binder ukuphucula ukusetyenziswa kwayo kunye nokwandisa ixesha lokusebenza, ukugcinwa kwamanzi kwe-HPMC kuthintela ukuqhekeka kwe-slurry ngokukhawuleza emva kokoma, kwaye kuphucula amandla emva kokuqina. Ukugcinwa kwamanzi luphawu olubalulekileyo lwe-hydroxypropyl methylcellulose HPMC, kwaye ikwayinkxalabo yabavelisi abaninzi be-wet-mix mortar basekhaya. Izinto ezichaphazela isiphumo sokugcina amanzi kwi-wet-mix mortar ziquka ubungakanani be-HPMC eyongeziweyo, i-viscosity ye-HPMC, ubuncinci bee-particles kunye nobushushu bendawo yokusetyenziswa.
Kukho imisebenzi emithathu ephambili ye-hydroxypropyl methylcellulose HPMC kwi-wet-mix mortar, enye inamandla okugcina amanzi, enye yimpembelelo kwi-consistency kunye ne-thixotropy ye-wet-mix mortar, kwaye eyesithathu kukusebenzisana nesamente. Ukugcinwa kwamanzi kwe-cellulose ether kuxhomekeke kwisantya sokufunxwa kwamanzi kwisiseko, ukwakheka kwe-mortar, ubukhulu bomaleko we-mortar, imfuno yamanzi ye-mortar, kunye nexesha lokuseta. Okukhona i-hydroxypropyl methylcellulose icaca kakhulu, kokukhona i-retention yamanzi ingcono.
Izinto ezichaphazela ukugcinwa kwamanzi kwi-mortar exutywe ngamanzi ziquka i-cellulose ether viscosity, ubungakanani bokongeza, ubungakanani bamasuntswana kunye nobushushu. Okukhona i-viscosity ye-cellulose ether inkulu, kokukhona i-viscosity ingcono. I-Viscosity yiparameter ebalulekileyo yokusebenza kwe-HPMC. Kwimveliso efanayo, iziphumo zokusebenzisa iindlela ezahlukeneyo zokulinganisa i-viscosity zahlukile kakhulu, kwaye ezinye zide zibe nomsantsa ophindwe kabini. Ke ngoko, uthelekiso lwe-viscosity kufuneka lwenziwe ngendlela efanayo yovavanyo, kubandakanya ubushushu, i-spindle, njl.
Ngokubanzi, okukhona i-viscosity iphezulu, kokukhona ukugcinwa kwamanzi kuyanda. Nangona kunjalo, okukhona i-viscosity iphezulu, kokukhona ubunzima be-molecular ye-HPMC buphakama kwaye ukunyibilika kwe-HPMC kuphantsi, oku kunempembelelo embi kumandla kunye nokusebenza kolwakhiwo lwe-mortar. Okukhona i-viscosity iphezulu, kokukhona isiphumo sokutyeba kwe-mortar sibonakala ngakumbi, kodwa asihambelani ngokuthe ngqo. Okukhona i-viscosity iphezulu, kokukhona i-mortar imanzi ixinene ngakumbi, kokukhona ukusebenza kolwakhiwo kubhetele, ukusebenza kwe-viscous scraper kuphezulu kwaye kuphezulu ukunamathela kwi-substrate. Nangona kunjalo, amandla okwakhiwa okwandisiweyo kwe-mortar emanzi ngokwayo awancedi. Ezi zakhiwo zimbini azinawo amandla acacileyo okulwa nokuwa. Ngokwahlukileyo koko, i-viscosity ephakathi nephantsi kodwa i-hydroxypropyl methylcellulose eguquliweyo inokusebenza okugqwesileyo ekuphuculeni amandla olwakhiwo lwe-mortar emanzi.
Okukhona i-cellulose ether ingaphezulu kwi-PMC wet mortar, kokukhona igcina amanzi kakuhle, kwaye i-viscosity iphezulu, kokukhona igcina amanzi kakuhle. Ukuqina kwayo kukwayindlela ebalulekileyo yokusebenza kwe-hydroxypropyl methylcellulose.
Ukuqina kwe-hydroxypropyl methylcellulose nako kunempembelelo ethile ekugcinweni kwamanzi. Ngokubanzi, kwi-hydroxypropyl methylcellulose ene-viscosity efanayo kunye nokuqina okwahlukileyo, okukhona ubunzima buncinci, kokukhona ukugcinwa kwamanzi kuncinci phantsi komlinganiselo ofanayo wokongeza. Okukhona kungcono.
Kwi-mortar exutywe ngamanzi, ubungakanani bokongeza be-cellulose ether HPMC buphantsi kakhulu, kodwa bunokuphucula kakhulu ukusebenza kolwakhiwo lwe-mortar emanzi, kwaye sesona songezo siphambili esichaphazela kakhulu ukusebenza kwe-mortar. Ukukhetha okufanelekileyo kwe-hydroxypropyl methylcellulose, ukusebenza kwe-mortar emanzi kuyachaphazeleka kakhulu.
Ixesha lokuthumela: Epreli-25-2023