Seretse sa phofshoana se ommeng se bolela ntho e nang le granular kapa phofo e entsoeng ka ho kopanya 'mele ea li-aggregates, lisebelisoa tsa samente tsa inorganic, le li-additives tse omisitsoeng le ho hlahlojoa ka tekanyo e itseng.Ke li-additives tse atisang ho sebelisoa bakeng sa seretse sa phofo se omileng?Seretse sa phofo se omileng ka kakaretso se sebelisa samente ea Portland e le thepa ea samente, 'me bongata ba thepa ea samente hangata bo nka 20% ho isa ho 40% ea seretse se omeletseng;Li-aggregate tse ngata tse ntle ke lehlabathe la quartz 'me li hloka tekanyo e kholo ea phekolo ea pele e kang ho omisa le ho hlahloba ho netefatsa hore boholo ba likaroloana tsa tsona le boleng ba tsona li finyella litlhoko tsa foromo;Ka linako tse ling molora oa fofa, phofo ea slag, joalo-joalo le tsona li eketsoa e le li-admixtures;Li-admixtures hangata li sebelisoa ka bongata bo fokolang, ho tloha ho 1% ho isa ho 3%, empa li na le phello e kholo.Hangata li khethoa ho ea ka litlhoko tsa sehlahisoa sa sehlahisoa ho ntlafatsa ho sebetsa, ho beha, matla, ho fokotseha, le ho hanyetsa serame sa seretse.
Ke mefuta efe e sebelisoang hangata ea li-additives tsa seretse sa phofo?
Phofo ea latex e ka qhaloang hape
Redispersible latex phofo e ka ntlafatsa thepa e latelang ka seretse sa phofo se omeletseng:
① Ho boloka metsi le ho sebetsa ha seretse se sa tsoa tsoakoa;
② Ts'ebetso ea tlamahano ea likarolo tse fapaneng tsa motheo;
③ The tenyetseha le deformation tshebetso ya seretse;
④ Matla a ho koba le momahano;
⑤ Apara khanyetso;
⑥ Ho mamella;
⑦ Compactness (ho se khonehe).
Tšebeliso eaphofshoana ea morao-rao ea latexka seretse se sesesane sa plastering, sekontiri sa lithaele tsa ceramic, sistimi ea ho kenya lebota kantle, le lisebelisoa tsa ho ipeha fatše li bonts'itse litholoana tse ntle.
Setsi sa ho boloka metsi le se teteaneng
Metsi a bolokang thickeners haholo-holo kenyeletsali-cellulose ethers, starch ethers, joalo-joalo The cellulose ether e sebelisoang seretseng sa phofo e omileng haholo-holo ke methyl hydroxyethyl cellulose ether (MHEC) le hydroxypropyl methyl cellulose ether (HPMC).
Setsi se fokotsang metsi
Mosebetsi oa mantlha oa lisebelisoa tse fokotsang metsi ke ho fokotsa tlhokahalo ea metsi a seretse, ka hona ho ntlafatsa matla a eona a khatello.Lisebelisoa tse ka sehloohong tse fokotsang metsi tse sebelisoang seretseng sa phofo e omileng li kenyelletsa casein, naphthalene e fokotsang metsi, melamine formaldehyde condensate le polycarboxylic acid.Casein ke superplasticizer e ntle haholo, haholo bakeng sa seretse se tšesaane, empa ka lebaka la tlhaho ea eona, boleng ba eona le theko hangata lia fetoha.Naphthalene letoto la lisebelisoa tse fokotsang metsi tse sebelisoang hangata β-Naphthalenesulfonic acid formaldehyde condensate.
Coagulant
Ho na le mefuta e 'meli ea li-coagulants: accelerator le retarder.Li-accelerating agents li sebelisetsoa ho potlakisa ho beha le ho thatafala ha seretse, 'me calcium formate le lithium carbonate li sebelisoa haholo.Aluminate le sodium silicate le tsona li ka sebelisoa e le li-accelerating agents.Retarder e sebelisetsoa ho fokotsa lebelo la ho beha le ho thatafala ha seretse, 'me tartaric acid, citric acid le letsoai la eona, hammoho le gluconate li sebelisitsoe ka katleho.
Moemeli o sa keneleng metsi
Lintho tse thibelang metsi haholo-holo li kenyelletsa metsoako ea polymer e kang iron chloride, organic silane compounds, fatty acid salts, polypropylene fibers, le rabara ea styrene butadiene.Iron chloride e thibela metsi e na le phello e ntle ea ho thibela metsi, empa e na le tšekamelo ea ho bola ha litšepe le likarolo tse kentsoeng tsa tšepe.Matsoai a insoluble a k'halsiamo a hlahisoang ke karabelo ea matsoai a acid e mafura a nang le li-ion tsa calcium sebakeng sa samente sa depositi maboteng a li-capillaries, a bapala karolo ea ho thibela li-pores le ho etsa hore mabota ana a li-capillary tube a fetohe libaka tsa hydrophobic, ka hona a bapala karolo e sa keneleng metsi.Theko ea lisebelisoa tsa lihlahisoa tsena e batla e le tlaase, empa ho nka nako e telele ho kopanya seretse ka ho lekana le metsi.
fiber
Likhoele tse sebelisetsoang ho etsa seretse sa phofo e ommeng li kenyelletsa fiber ea khalase e hanyetsanang le alkali, fiber ea polyethylene (polypropylene fiber), matla a phahameng le fiber e phahameng ea modulus polyvinyl alcohol (polyvinyl alcohol fiber).fiber ea lehong, joalo-joalo Tse sebelisoang ka ho fetisisa ke matla a phahameng le a phahameng a modulus polyvinyl alcohol fibers le polypropylene fibers.Matla a phahameng le likhoele tse phahameng tsa modulus polyvinyl alcohol li na le ts'ebetso e ntle le theko e tlase ho feta likhoele tsa polypropylene tse tsoang kantle ho naha.Li-fibers li ajoa ka mokhoa o sa tloaelehang le ka mokhoa o ts'oanang ka har'a matrix a samente, 'me li tlamahanngoa haufi-ufi le samente ho thibela ho thehoa le nts'etsopele ea li-microcracks, ho etsa hore matrix a seretse a teteane, ka hona a na le ts'ebetso e sa keneleng metsi le tšusumetso e babatsehang le ho hanyetsa ho phunyeha.Bolelele ke 3-19 mm.
Defoamer
Hajoale, li-defoam tsa phofo tse sebelisoang seretseng sa phofo e omileng ke li-polyols le polysiloxanes.Ts'ebeliso ea li-defoamers ha e khone ho fetola litaba tsa bubble feela, empa hape e fokotsa ho fokotseha.Lits'ebetsong tse sebetsang, molemong oa ho ntlafatsa ts'ebetso e felletseng, li-additives tse ngata li hloka ho sebelisoa ka nako e le 'ngoe.Nakong ena, hoa hlokahala ho ela hloko tšusumetso e kopanetsoeng pakeng tsa li-additives tse sa tšoaneng.Ho phaella moo, ho boetse hoa hlokahala ho ela hloko palo ea li-additives tse kenyelletsoeng.E fokolang haholo ho bonahatsa phello ea li-additives;Ho feta tekano, ho ka ba le litla-morao.
Nako ea poso: Aug-29-2023