Mesebetsi le litlhoko tsa lisebelisoa tse fapaneng ka seretse sa gypsum-based self-leveling ke eng?

(1) Gypsum

Ho ea ka lisebelisoa tse tala tse sebelisoang, e arotsoe ka mofuta oa II anhydrite le α-hemihydrate gypsum.Lisebelisoa tseo ba li sebelisang ke:

① Mofuta oa II oa gypsum ea anhydrous

Gypsum e bonaletsang kapa alabaster e nang le maemo a holimo le sebopeho se bonolo se lokela ho khethoa.Mocheso oa calcination o pakeng tsa 650 le 800 ° C, 'me hydration e etsoa tlas'a ketso ea activator.

②-Gypsum hemihydrate

-Theknoloji ea tlhahiso ea hemihydrate gypsum haholo-holo e kenyelletsa mokhoa o omileng oa ho sokoloha le mokhoa oa ho fetola metsi haholo-holo ho kopanya ho omisa le ho omisa.

(2) Samente

Ha u itokisetsa gypsum ea ho ikemela, ho ka eketsoa samente e nyane, mme mesebetsi ea eona ea mantlha ke:

① Fana ka tikoloho ea alkaline bakeng sa metsoako e itseng;

② Ntlafatsa coefficient e bonolo ea 'mele o thata oa gypsum;

③ Ntlafatsa metsi a slurry;

④Fetosa nako ea tlhophiso ea mofuta oa Ⅱ gypsum e ikemetseng e ikemetseng.

Samente e sebelisitsoeng ke 42.5R Portland samente.Ha ho lokisoa gypsum e ikemetseng e mebala, ho ka sebelisoa samente e tšoeu ea Portland.Palo ea samente e kentsoeng ha ea lumelloa ho feta 15%.

(3) Ho beha molaoli oa nako

Ka seretse sa gypsum se ikemetseng, haeba ho sebelisoa mofuta oa II anhydrous gypsum, ho lokela ho sebelisoa accelerator ea ho seta, 'me haeba -hemihydrate gypsum e sebelisoa, ho lokela ho sebelisoa "setting retarder" ka kakaretso.

① Coagulant: E entsoe ka li-sulfate tse fapaneng le letsoai la tsona le habeli, joalo ka calcium sulfate, ammonium sulfate, potassium sulfate, sodium sulfate le li-alum tse fapaneng, joalo ka alum (aluminium potassium sulfate), red alum (potassium dichromate), bile alum ( koporo sulfate), joalo-joalo:

②Retarder:

Citric acid kapa trisodium citrate ke gypsum retarder e sebelisoang hangata.E qhibiliha habonolo ka metsing, e na le phello e hlakileng ea ho lieha le theko e tlaase, empa hape e tla fokotsa matla a 'mele o thata oa gypsum.Li-retarders tse ling tsa gypsum tse ka sebelisoang li kenyelletsa: sekhomaretsi, sekhomaretsi sa casein, masala a starch, tannic acid, tartaric acid, joalo-joalo.

(4) Setsi se fokotsang metsi

The fluidity ea self-leveling gypsum ke taba ea bohlokoa.E le hore u fumane gypsum slurry e nang le metsi a mangata, ho eketsa tšebeliso ea metsi feela ho tla lebisa ho fokotseha ha matla a 'mele o thata oa gypsum, esita le ho tsoa mali, e leng ho tla etsa hore holim'a metsi a be bonolo, a lahleheloe ke phofo,' me a se ke a sebelisoa.Ka hona, mochini o fokotsang metsi oa gypsum o tlameha ho hlahisoa ho eketsa metsi a gypsum slurry.Li-superplasticizers tse loketseng ho lokisoa ha gypsum e ikemetseng li kenyelletsa li-superplasticizers tse thehiloeng ho naphthalene, li-superplasticizers tse phahameng tsa polycarboxylate, jj.

(5) Setsi sa ho boloka metsi

Ha gypsum slurry e ikemetseng e ikemela, metsi a slurry a fokotseha ka lebaka la ho kenngoa ha metsi ho setsi.E le hore u fumane gypsum slurry e loketseng ea ho ikemela, ho phaella ho metsi a eona ho finyella litlhoko, slurry le eona e tlameha ho ba le ho boloka metsi hantle.'Me hobane botle le matla a khoheli a khethehileng a gypsum le samente ka thepa ea motheo li fapane haholo, slurry e na le tšekamelo ea ho delamination nakong ea ts'ebetso ea phallo le ts'ebetso e tsitsitseng ea ho thatafatsa.E le ho qoba liketsahalo tse ka holimo, ho hlokahala ho eketsa tekanyo e nyenyane ea ho boloka metsi.Lisebelisoa tse bolokang metsi hangata li sebelisa lintho tsa cellulose, joalo ka methyl cellulose, hydroxyethyl cellulose le carboxypropyl cellulose.

(6) polymer

Ntlafatsa abrasion, crack le ho hanyetsa metsi ha thepa ea ho ikemela ka ho sebelisa li-polymers tse entsoeng ka phofo

(7) Defoamer Ho felisa li-bubble tsa moea tse hlahisoang nakong ea ho kopanya thepa, tributyl phosphate hangata e sebelisoa.

(8) ho tlatsa

E sebelisetsoa ho qoba ho arohana ha likarolo tsa thepa ea boipheliso e le hore ho be le metsi a molemo.Li-fillers tse ka sebelisoang, tse kang dolomite, calcium carbonate, molora o fofang fatše, slag e timang metsi a fatše, lehlabathe le letle, joalo-joalo.

(9) Kakaretso e ntle

Morero oa ho eketsa kakaretso e ntle ke ho fokotsa shrinkage ea ho omisa ea 'mele o thata oa gypsum, ho eketsa matla a holim'a metsi le ho hanyetsa' mele o thata, le ho sebelisa lehlabathe la quartz ka kakaretso.

Ke lintho life tse hlokahalang bakeng sa seretse sa gypsum self-leveling?

Mofuta oa β-mofuta oa hemihydrate gypsum o fumanoeng ka calcining dihydrate gypsum ea sehlopha sa pele ka bohloeki bo fetang 90% kapa α-mofuta oa hemihydrate gypsum e fumanoang ka autoclaving kapa hydrothermal synthesis.

Active admixture: ho intša boemong ba thepa ka sebelisa fofa molora, slag phofo, joalo-joalo e le mafolofolo admixtures, morero ke ho ntlafatsa phatsa gradation ea lintho tse bonahalang le ho ntlafatsa tshebetso ya lintho tse bonahalang tse thatafetseng 'mele.Phofo ea Slag e kenella karabelo ea hydration tikolohong ea alkaline, e ka ntlafatsang compactness le matla a morao-rao a sebopeho sa thepa.

Lisebelisoa tsa pele tsa matla a samente: E le ho netefatsa nako ea kaho, lisebelisoa tsa ho iketsetsa li na le litlhoko tse itseng bakeng sa matla a pele (haholo-holo 24h flexural and compressive strength).Samente ea sulphoaluminate e sebelisoa e le thepa ea pele ea matla ea samente.Samente ea sulphoaluminate e na le lebelo la ho phalla ka potlako le matla a pele a pele, a ka finyellang litlhoko tsa matla a pele a thepa.

Alkaline activator: Thepa ea gypsum composite cementitious e na le matla a phahameng ka ho fetesisa a ommeng tlasa maemo a alkaline a itekanetseng.Quicklime le 32.5 samente li ka sebelisoa ho lokisa boleng ba pH ho fana ka tikoloho ea alkaline bakeng sa hydration ea thepa ea samente.

Coagulant: Nako ea ho beha ke index ea bohlokoa ea ts'ebetso ea lisebelisoa tsa ho ikemela.Nako e khuts'oane kapa e telele haholo ha e lokele ho haha.Coagulant e susumetsa ts'ebetso ea gypsum, e potlakisa lebelo la supersaturated crystallization ea dihydrate gypsum, e khutsufatsa nako ea ho beha, 'me e boloka nako ea ho beha le e thata ea lisebelisoa tsa ho ikemela ka har'a sebaka se lekaneng.

Moemeli oa ho fokotsa metsi: E le ho ntlafatsa ho kopana le matla a thepa ea ho ikemela, hoa hlokahala ho fokotsa karolelano ea metsi a kopanyang metsi.Tlas'a boemo ba ho boloka metsi a matle a lisebelisoa tsa ho ikemela, hoa hlokahala ho eketsa lisebelisoa tse fokotsang metsi.Ho sebelisoa ho fokotsa metsi a thehiloeng ho naphthalene, 'me mokhoa oa eona oa ho fokotsa metsi ke hore sehlopha sa sulfonate ka molek'hule e fokotsang metsi e thehiloeng ho naphthalene le molek'hule ea metsi e amahanngoa le litlamo tsa hydrogen, ho etsa filimi e tsitsitseng ea metsi holim'a gelled. lintho tse bonahalang, ho etsa hore ho be bonolo ho hlahisa metsi pakeng tsa likaroloana tsa lintho tse bonahalang.Ho thella, ka hona ho fokotsa palo ea metsi a kopanyang a hlokahalang le ho ntlafatsa sebopeho sa 'mele o thata oa thepa.

Moemeli oa ho boloka metsi: lisebelisoa tsa ho ikemela li hahiloe fatše, 'me botenya ba kaho bo batla bo le tšesaane,' me metsi a kenngoa habonolo ke motheo oa fatše, e leng se etsang hore ho se ke ha e-ba le hydration e lekaneng ea thepa, mapetsong a holim'a metsi, 'me a fokotseha. matla.Tekong ena, methyl cellulose (MC) e khethiloe e le moemeli oa ho boloka metsi.MC e na le mokhoa o motle oa ho koloba, ho boloka metsi le thepa ea ho etsa lifilimi, e le hore thepa ea boipheliso e se ke ea tsoa mali 'me e na le metsi ka ho feletseng.

Redispersible latex powder (eo ka mor'a moo e bitsoang phofo ea latex): phofo ea latex e ka eketsa modulus e tsitsitseng ea thepa ea ho ikemela, ea ntlafatsa ho hanyetsa ha crack, matla a tlamo le ho hanyetsa metsi.

Defoamer: The defoamer e ka ntlafatsa lintho tse bonahalang tsa thepa ea boipheliso, ea fokotsa li-bubble ha thepa e thehoa, 'me ea ba le phello e itseng ho ntlafatsa matla a thepa.