I-Viscosity yiparameter yepropati ebalulekileyo ye-cellulose ether.Ngokuqhelekileyo, okukhona i-viscosity iphezulu, ingcono isiphumo sokugcina amanzi kwi-gypsum mortar.Nangona kunjalo, okukhona i-viscosity iphezulu, kokukhona ubunzima bemolekyuli be-cellulose ether bunjalo, kunye nokunyibilika kwe-ether cellulose kuncipha ngokufanelekileyo.Okukhona i-viscosity iphezulu, kokukhona kubonakala ngakumbi ukuba isiphumo sokuqina, kodwa asilingani.Ukuphakama kwe-viscosity, ngakumbi udaka olumanzi luya kuba, ekwakhiweni, ukusebenza kokunamathela kwi-scraper kunye nokunamathela okuphezulu kwi-substrate.Kodwa akuloncedo ukwandisa amandla esakhiwo sodaka olumanzi ngokwalo.Ukongezelela, ngexesha lokwakhiwa, ukusebenza kodaka olumanzi oluchasene nokusebenza kwe-sagging alubonakali.Ngokwahlukileyo, enye i-Methyl cellulose elungisiweyo ene-viscosity ephantsi ukuya ephakathi ibonise ukuphucuka kumandla okwakhiwa kodaka olumanzi.Izixhobo zodonga lokwakha ubukhulu becala zizakhiwo ezinama-porous, zinokufunxa amanzi.Kwaye izinto zokwakha ze-gypsum ezisetyenziselwa ukwakhiwa kweendonga, emva kokongeza ukumodareyitha kwamanzi eludongeni, ukufuma kulula ukufunxwa eludongeni, okubangela ukuba i-gypsum iswele ukufuma okuyimfuneko kwi-hydration, kubangela ubunzima ekwakhiweni kokutyabeka kunye nokunciphisa amandla ebhondi. , ngoko ke kukho iintanda, igubu elinomngxuma, ispalling kunye nezinye iingxaki zomgangatho.Ukuphucula ukugcinwa kwamanzi kwezixhobo zokwakha i-gypsum kunokusombulula ingxaki yomgangatho wokwakha kunye nokuphucula amandla okudibanisa nodonga.Ngoko ke, i-ejenti yokugcina amanzi iye yaba enye yezongezo ezibalulekileyo zezinto zokwakha ze-gypsum.
Ukuze kuququzelelwe ukwakhiwa, izixhobo ze-powder zokwakha ezifana ne-plaster, i-adhesive plaster, i-plaster yokudibanisa kunye ne-plaster putty isetyenzisiweyo, kunye ne-gypsum retarder yongezwa kwimveliso yokwandisa ixesha lokwakhiwa kwe-plaster paste, kuba inkqubo ye-hydration ye-hemihydrate. I-gypsum inqandekile ngokongeza i-retarder kwi-gypsum, olu hlobo lwe-gypsum paste kufuneka luhlale eludongeni kwiiyure ezingama-1-2 ngaphambi kokuseta, kwaye uninzi lweendonga zinepropathi yokufunxa amanzi, ngakumbi, izinto ezintsha zodonga olulula ezifana neendonga zezitena, Iindonga zekhonkrithi ene-aerated, i-perforated thermal insulation panels, ukuze kuqhutywe unyango lokugcinwa kwamanzi kwi-gypsum slurry, ukuphepha ukuhanjiswa kolunye udaka lwamanzi eludongeni, kubangela ukuba i-gypsum paste ibe lukhuni xa ukunqongophala kwamanzi, ukuchithwa kwamanzi akuphelelanga. , ibangela i-gypsum kunye nodonga olungaphezulu kwendawo yokuhlukana kwendawo, igobolondo.Ukongeza i-ejenti yokugcina amanzi kukugcina umswakama oqulethwe kwi-gypsum paste, ukuqinisekisa ukuphendulwa kwe-hydration ye-gypsum paste kwi-interface, ngaloo ndlela iqinisekisa amandla ebhondi.Iiarhente eziqhelekileyo zokugcina amanzi zii-cellulose ethers, ezifana neMethyl cellulose (MC) , hypromellose (HPMCI-hydroxyethyl methyl cellulose (HEMC) , njl.Ukongeza, i-polyvinyl alcohol, i-alginate yesodium, isitashi esilungisiweyo, i-diatomite kunye nomgubo onqabileyo womhlaba nawo unokusetyenziselwa ukuphucula ukugcinwa kwamanzi.
Ixesha lokuposa: Jul-26-2023