Viscosity ke karolo ea bohlokoa ea thepa ea cellulose ether. Ha re bua ka kakaretso, ha viscosity e phahame, ho ba le phello e ntle ea ho boloka metsi ea seretse sa gypsum. Leha ho le joalo, ha viscosity e phahame, boima ba molek'hule ea cellulose ether bo phahame, 'me ho qhibiliha ha cellulose ether ho fokotseha ka tsela e nepahetseng. Ha li-viscosity li phahame, ho totobetse haholoanyane hore phello e teteaneng e ntse e le teng, empa ha e lekane. Ha li-viscosity li phahame, seretse se metsi se tla khomarela haholoanyane, mohahong, ts'ebetso ea ho khomarela scraper le ho khomarela holimo ho substrate. Empa ha ho na thuso ho eketsa matla a sebopeho sa seretse se metsi ka boeona. Ho phaella moo, nakong ea kaho, ts'ebetso ea ts'ebetso ea seretse se metsi e khahlanong le ho fokotseha ha e totobetse. Ka lehlakoreng le leng, methyl cellulose e fetotsoeng e nang le viscosity e tlase ho isa bohareng e bonts'itse ntlafatso ea matla a sebopeho sa seretse se metsi. Lisebelisoa tsa lerako la mohaho hangata li na le li-porous, li na le ho monya metsi. 'Me thepa ea ho haha gypsum e sebelisetsoang ho haha marako, ka mor'a ho eketsa molumo oa metsi leboteng, mongobo o bonolo ho kenngoa ke lerako, ho etsa hore gypsum e hloke mongobo o hlokahalang bakeng sa hydration, e bakang mathata a ho haha mohaho le ho fokotsa matla a tlamahano, kahoo ho na le mapetsong, moqomo o sekoti, spalling le mathata a mang a boleng. Ho ntlafatsa ho boloka metsi a thepa ea ho haha gypsum ho ka rarolla bothata ba boleng ba kaho le ho ntlafatsa matla a tlamahano le lerako. Ka hona, moemeli oa ho boloka metsi o fetohile e 'ngoe ea li-additives tsa bohlokoa tsa thepa ea mohaho oa gypsum.
Bakeng sa ho nolofatsa kaho, ho sebelisoa lisebelisoa tsa phofo ea moaho joalo ka plaster, sekhomaretsi, plaster e kopanyang le plaster putty, 'me gypsum retarder e eketsoa molemong oa ho lelefatsa nako ea kaho ea pente ea samente, hobane ts'ebetso ea hydration ea hemihydrate gypsum e thibeloa ka ho eketsa retarder ho gypsum, mofuta ona oa gypsum o lula leboteng le lihora tse ngata. Ho ba le thepa ea ho monya metsi, haholoholo, lisebelisoa tse ncha tse bobebe tsa lebota joalo ka mabota a litene, mabota a konkreite a aerated, liphanele tse kentsoeng ka mocheso o kentsoeng ka mocheso, kahoo ho etsa kalafo e bolokang metsi ea gypsum slurry, ho qoba ho fetisetsoa ha metsi a mang leboteng, ho etsa hore gypsum e thatafale ha khaello ea metsi e haella, ho etsa hore lerako le se ke la felloa ke metsi. Ho eketsa moemeli oa ho boloka metsi ke ho boloka mongobo o teng ka har'a pente ea gypsum, ho etsa bonnete ba ho arabela ha hydration ea gypsum paste ho sebopeho, kahoo ho netefatsa matla a tlamo. Lintho tse tloaelehileng tse bolokang metsi ke li-cellulose ethers, tse kang Methyl cellulose (MC) , hypromellose (HPMChydroxyethyl methyl cellulose (HEMC), joalo-joalo. Ho phaella moo, joala ea polyvinyl, alginate ea sodium, starch e fetotsoeng, diatomite le phofo e sa tloaelehang ea lefats'e e ka boela ea sebelisoa ho ntlafatsa ho boloka metsi.
Nako ea poso: Jul-26-2023