Mosebetsi oa ho boloka metsi ke ofe o kopantsoeng le thepa ea phofo ea gypsum?
Karabo: ho roala gypsum, gypsum e kopantsoeng, gypsum ea caulking, gypsum putty le lisebelisoa tse ling tsa phofo ea kaho li sebelisoa. E le ho nolofatsa kaho, li-retarders tsa gypsum li kenngoa nakong ea tlhahiso ho lelefatsa nako ea kaho ea gypsum slurry. Retarder e eketsoa ho thibela ts'ebetso ea hydration ea hemihydrate gypsum. Mofuta ona oa gypsum slurry o hloka ho bolokoa leboteng lihora tse 1 ho isa ho tse 2 pele o hokahana, 'me mabota a mangata a na le thepa ea ho monya metsi, haholo mabota a litene, hammoho le mabota a konkreite, liboto tsa porous insulation le tse ling tse ncha tse bobebe. lisebelisoa tsa lerako, kahoo gypsum slurry e lokela ho bolokoa ka metsi ho thibela karolo ea metsi a slurry ho fetela leboteng, e leng se bakang khaello ea metsi ha gypsum slurry e thatafala ebile ha e na metsi a lekaneng. Ka ho feletseng, ho baka karohano le shelling ea motsoako pakeng tsa samente le bokaholimo ba lerako. Ho eketsoa ha moemeli oa ho boloka metsi ke ho boloka mongobo o teng ka har'a gypsum slurry, ho etsa bonnete ba ho arabela ha hydration ea gypsum slurry ho sebopeho, e le ho netefatsa matla a ho kopanya. Lisebelisoa tse sebelisoang ka tloaelo ho boloka metsi ke li-cellulose ethers, tse kang: methyl cellulose (MC), hydroxypropyl methyl cellulose (HPMC), hydroxyethyl methyl cellulose (HEMC), joalo-joalo Ho phaella moo, joala ea polyvinyl, sodium alginate, starch e fetotsoeng, lefatše la diatomaceous, phofo ea lefats'e e sa tloaelehang, joalo-joalo e ka boela ea sebelisoa ho ntlafatsa ts'ebetso ea ho boloka metsi.
Ho sa tsotellehe hore na ke mofuta ofe oa ho boloka metsi o ka liehisang tekanyo ea hydration ea gypsum ho ea ho likhato tse sa tšoaneng, ha palo ea retarder e ntse e sa fetohe, moemeli oa ho boloka metsi a ka fokotsa nako ea metsotso e 15-30. Ka hona, palo ea li-retarder e ka fokotsoa ka nepo.
Tekanyo e nepahetseng ea sesebelisoa sa ho boloka metsi ka thepa ea phofo ea gypsum ke efe?
Karabo: Lisebelisoa tse bolokang metsi li sebelisoa hangata ha ho etsoa thepa ea phofo ea kaho joalo ka gypsum, bonding gypsum, caulking gypsum, le gypsum putty. Hobane mofuta ona oa gypsum o kopantsoe le retarder, e thibelang ts'ebetso ea hydration ea hemihydrate gypsum, hoa hlokahala ho Ts'oara phekolo ea ho boloka metsi holim'a gypsum slurry ho thibela karolo ea metsi a slurry ho fetisetsa leboteng, ho fella ka khaello ea metsi le hydration e sa fellang ha gypsum slurry e thatafalitsoe. Ho eketsoa ha moemeli oa ho boloka metsi ke ho boloka mongobo o teng ka har'a gypsum slurry, ho etsa bonnete ba ho arabela ha hydration ea gypsum slurry ho sebopeho, e le ho netefatsa matla a ho kopanya.
Tekanyetso ea eona hangata ke 0.1% ho 0.2% (accounting for gypsum), ha gypsum slurry e sebelisoa maboteng a nang le metsi a matla (joalo ka konkreite e nang le aerated, liboto tsa perlite insulation, gypsum blocks, mabota a litene, joalo-joalo), le Ha u lokisa bonding. gypsum, caulking gypsum, top plastering gypsum kapa surface thin putty, palo ea ho boloka metsi moemeli o hloka ho ba kholoanyane (ka kakaretso 0.2% ho 0.5%).
Lisebelisuoa tse bolokang metsi tse kang methyl cellulose (MC) le hydroxypropyl methylcellulose (HPMC) li qhibiliha ka mokhoa o batang, empa li tla etsa maqeba mothating oa pele ha li qhibiliha ka ho toba metsing. Moemeli oa ho boloka metsi o hloka ho kopanngoa pele le phofo ea gypsum ho hasana. Lokisetsa ka phofo e omileng; eketsa metsi le hlohlelletsa, a re ke re eme bakeng sa metsotso e 5, hlohlelletsa hape, phello e molemo. Leha ho le joalo, hona joale ho na le lihlahisoa tsa ether tsa cellulose tse ka qhibilihang ka ho toba ka metsing, empa li na le phello e fokolang tlhahisong ea seretse se omeletseng sa phofo.
Setsi sa ho thibela metsi se etsa joang mosebetsi o sa keneleng metsi 'meleng o thata oa gypsum?
Karabo: Mefuta e fapaneng ea li-agent tse thibelang metsi li etsa mosebetsi oa tsona o sa keneleng metsi 'meleng o thata oa gypsum ho latela mekhoa e fapaneng ea liketso. Ha e le hantle e ka akaretsoa ka mekhoa e mene e latelang:
(1) Fokotsa ho qhibiliha ha 'mele o thata oa gypsum, eketsa coefficient e nolofatsang,' me u fetole ka mokhoa o fokolang calcium sulfate dihydrate e nang le ho qhibiliha ho hoholo 'meleng o thata ho ba letsoai la k'halsiamo le ho qhibiliha ha tlaase. Mohlala, saponified synthetic fatty acid e nang le C7-C9 e ea eketsoa, 'me palo e loketseng ea quicklime le ammonium borate lia eketsoa ka nako e le 'ngoe.
(2) Hlahisa lera la filimi e sa keneleng metsi ho thibela li-pores tse ntle tsa capillary 'meleng o thata. Ka mohlala, ho kopanya emulsion ea parafine, emulsion ea asphalt, emulsion ea rosin le parafine-rosin composite emulsion, e ntlafalitsoeng ea asphalt composite emulsion, joalo-joalo.
(3) Fetola matla a holim'a 'mele o thata, e le hore limolek'hule tsa metsi li be boemong bo kopanetsoeng' me li ke ke tsa kenella ka har'a litsela tsa capillary. Ka mohlala, li-repellents tse fapa-fapaneng tsa silicone li kenyelelitsoe, ho kenyelletsa le oli e fapaneng ea emulsified silicone.
(4) Ka ho roala ka ntle kapa ho qoelisoa ho arola metsi hore a se ke a qoelisoa ka har'a litsela tsa capillary tsa 'mele o thata, mefuta e sa tšoaneng ea silicone e thibelang metsi e ka sebelisoa. Li-silicone tse thehiloeng ho solvent li betere ho feta li-silicone tse thehiloeng metsing, empa ea pele e etsa hore ho kenella ha khase ea 'mele o thata oa gypsum ho fokotsehe.
Le hoja lisebelisoa tse fapaneng tsa ho thibela metsi li ka sebelisoa ho ntlafatsa ho thibela metsi ha thepa ea mohaho oa gypsum ka litsela tse sa tšoaneng, gypsum e ntse e le lisebelisoa tse thatafatsang moea, tse sa lokelang bakeng sa tikoloho ea ka ntle kapa ea nako e telele ea mongobo, 'me e loketse feela tikoloho e nang le ho fapanyetsana. maemo a metsi le a omileng.
Ke phetoho efe ea ho haha gypsum ka moemeli oa ho thibela metsi?
Karabo: Ho na le mekhoa e 'meli e ka sehloohong ea ts'ebetso ea gypsum e thibelang metsi: e' ngoe ke ho eketsa coefficient e nolofatsang ka ho fokotsa ho qhibiliha ha metsi, 'me e' ngoe ke ho fokotsa tekanyo ea ho kenngoa ha metsi ka thepa ea gypsum. 'Me ho fokotsa ho monngoa ha metsi ho ka etsoa ka likarolo tse peli. E 'ngoe ke ho eketsa compactness ea gypsum e thata, ke hore, ho fokotsa ho kenngoa ha metsi ka gypsum ka ho fokotsa porosity le mapetsong a sebopeho, e le ho ntlafatsa ho hanyetsa metsi a gypsum. E 'ngoe ke ho eketsa matla a holim'a' mele o thata oa gypsum, ke hore, ho fokotsa ho kenngoa ha metsi ka gypsum ka ho etsa hore bokaholimo ba pore bo be filimi ea hydrophobic.
Lisebelisoa tse thibelang metsi tse fokotsang porosity li phetha karolo ea ho thibela li-pores tse ntle tsa gypsum le ho eketsa ho kopana ha 'mele oa gypsum. Ho na le admixtures tse ngata bakeng sa ho fokotsa porosity, tse kang: parafini emulsion, asphalt emulsion, rosin emulsion le parafine asphalt composite emulsion. Lisebelisoa tsena tsa ho thibela metsi li sebetsa hantle ho fokotsa porosity ea gypsum tlas'a mekhoa e nepahetseng ea ho hlophisa, empa ka nako e ts'oanang, e boetse e na le liphello tse mpe ho lihlahisoa tsa gypsum.
Ntho e tloaelehileng ka ho fetisisa e lelekang metsi e fetolang matla a holim'a metsi ke silicone. E ka kenella boema-kepeng ba pore e 'ngoe le e' ngoe, ea fetola matla a holim'a metsi ka har'a bolelele bo itseng, 'me kahoo ea fetola angle ea ho kopana le metsi, ea etsa hore limolek'hule tsa metsi li kopane ho etsa marotholi, li thibela ho kenella ha metsi, li fihlele morero oa ho thibela metsi, 'me ka nako e tšoanang boloka Air permeability ea samente. Mefuta e sa tšoaneng ea mofuta ona oa moemeli oa ho thibela metsi haholo-holo e kenyelletsa: sodium methyl siliconate, resin silicone, oli ea silicone ea emulsified, joalo-joalo Ha e le hantle, moemeli ona oa ho thibela metsi o hloka hore bophara ba li-pores bo se ke ba e-ba kholo haholo, 'me ka nako e ts'oanang bo ke ke ba hanyetsa. ho kenngoa ha metsi a khatello, 'me ha e khone ho rarolla mathata a nako e telele a sa keneleng metsi le a mongobo a lihlahisoa tsa gypsum.
Bafuputsi ba malapeng ba sebelisa mokhoa oa ho kopanya lisebelisoa tsa manyolo le lisebelisoa tsa inorganic, ke hore, ho itšetlehile ka moemeli oa ho thibela metsi oa emulsion o fumanoang ke co-emulsification ea polyvinyl joala le stearic acid, le ho eketsa lejoe la alum, naphthalenesulfonate aldehyde condensate Mofuta o mocha oa gypsum composite waterproofing. moemeli e entsoe ka ho kopanya letsoai le thibelang metsi. Moemeli oa gypsum composite thibela metsi a ka kopanngoa ka ho toba le gypsum le metsi, a kenya letsoho ts'ebetsong ea crystallization ea gypsum, 'me a fumana phello e ntle ea ho thibela metsi.
Ke phello efe e thibelang ea silane e thibelang metsi ho efflorescence ka seretse sa gypsum?
Karabo: (1) Ho eketsoa ha moemeli oa silane ho thibela metsi ho ka fokotsa haholo tekanyo ea efflorescence ea seretse sa gypsum, 'me tekanyo ea efflorescence inhibition ea seretse sa gypsum e eketseha ka ho eketseha ha silane ho phaella ka har'a mefuta e itseng. Tšusumetso ea ho thibela silane ho 0.4% ea silane e loketse, 'me phello ea eona ea ho thibela e atisa ho ba e tsitsitseng ha chelete e feta chelete ena.
(2) Ho phaella ha silane ha ho etse feela lesela la hydrophobic holim'a seretse ho thibela ho kenella ha metsi a ka ntle, empa hape ho fokotsa ho falla ha li-lye tse ka hare ho etsa efflorescence, e leng ho ntlafatsa haholo phello ea inhibitory ea efflorescence.
(3) Le hoja ho eketsoa ha silane ho thibela efflorescence haholo, ha ho na phello e mpe ho thepa ea mochini oa seretse sa gypsum sa indasteri, 'me ha e ame sebopeho sa sebopeho sa ka hare le bokhoni ba ho qetela ba gypsum e omileng ea indasteri. - kopanya lisebelisoa tsa mohaho .
Nako ea poso: Nov-22-2022