Lub ntsiab yam tseem ceeb rau yellowing ntawm cov dej-resistant putty Tom qab cov ntaub ntawv tshawb fawb, ib tug loj tus naj npawb ntawm thwmsim thiab engineering xyaum, tus sau ntseeg hais tias lub ntsiab yam tseem ceeb rau yellowing ntawm cov dej-resistant putty yog raws li nram no: :
Yog vim li cas 1. Calcium hydroxide (ash calcium hmoov) rov qab mus rau alkali ua rau yellowing Calcium hydroxide, molecular mis Ca (OH) 2, txheeb ze molecular hnyav 74, melting point 5220, pH nqi ≥ 12, muaj zog alkaline, dawb hmoov hmoov, me ntsis Soluble nyob rau hauv dej, soluble hauv acid, glycerin, qab zib, ammonium chloride, soluble hauv acid kom tso tawm Thaum tshav kub kub, qhov txheeb ze ntom ntom yog 2.24, nws cov kua ntshiab aqueous yog xim tsis muaj xim, tsis muaj ntxhiab alkaline pob tshab kua, maj mam nqus, calcium oxide ua calcium carbonate. Calcium hydroxide yog ib qho muaj zog alkaline, nws cov alkalinity thiab corrosiveness tsis muaj zog tshaj li sodium hydroxide, calcium hydroxide thiab nws cov kua aqueous yog corrosive rau tib neeg daim tawv nqaij, khaub ncaws, thiab lwm yam, tab sis tsis muaj tshuaj lom, thiab yuav tsum tsis txhob nyob rau hauv kev sib cuag nrog cov tawv nqaij. ntev.
Calcium hydroxide yog ib qho active muab tso rau hauv dej-resistant putty los ua ib tug tawv zaj duab xis nrog hnyav calcium carbonate thiab high-gloss roj hmab hmoov. Vim nws muaj zog alkalinity thiab siab alkali ntsiab lus, ib feem ntawm cov dej nyob rau hauv lub putty yuav absorbed los ntawm phab ntsa puag thaum lub sij hawm tsim kho. Tib yam muaj zog alkaline cement mortar hauv qab, lossis xuab zeb-txiv qaub hauv qab (txiv qaub, xuab zeb, ib qho me me ntawm cov cement) yog absorbed, raws li cov txheej putty maj mam qhuav thiab dej volatilizes, cov alkaline tshuaj nyob rau hauv cov nyom mortar thiab putty thiab ib co ntawm Lawv tsis ruaj tsis khov tom qab hydrolysis Cov khoom hauv lub putty (xws li ferrous hlau, ferric hlau, thiab lwm yam) yuav tawm los ntawm cov me me. pores ntawm lub putty, thiab cov tshuaj tiv thaiv yuav tshwm sim tom qab ntsib huab cua, ua rau saum npoo ntawm putty tig daj.
Yog vim li cas 2. Volatile organic chemical gases. Xws li cov pa roj carbon monoxide (CO), sulfur dioxide (SO2), benzene, toluene, xylene, formaldehyde, pyrotechnics, thiab lwm yam. Hauv qee qhov kev tsim vaj tsev, muaj qee qhov xwm txheej uas cov xim pleev xim tau tig daj vim yog siv cov xim pleev xim thiab cov khoom siv. hluav taws kub kom sov nyob rau hauv chav tsev uas cov dej-resistant putty twb nyuam qhuav scraped, los yog txawm hlawv xyab nyob rau hauv lub chav tsev, thiab muaj coob tus neeg haus luam yeeb tib lub sij hawm.
Yog vim li cas 3. Qhov cuam tshuam ntawm huab cua thiab ib puag ncig. Hauv thaj av qaum teb, thaum lub caij hloov pauv lub caij, qhov chaw ntawm putty feem ntau tig daj txij lub Kaum Ib Hlis mus txog rau lub Tsib Hlis xyoo tom ntej, tab sis qhov no tsuas yog ib qho tshwm sim cais.
Yog vim li cas 4. Qhov cua thiab ziab qhuav tsis zoo. Phab ntsa ntub dej. Tom qab khawb cov dej-resistant putty, yog tias cov txheej putty tsis qhuav tag, kaw lub qhov rooj thiab qhov rais rau lub sij hawm ntev yuav yooj yim ua rau saum npoo ntawm putty tig daj.
Yog vim li cas 5. Cov teeb meem hauv paus. Hauv qab ntawm phab ntsa qub feem ntau yog cov xuab zeb-grey phab ntsa (txiv qaub, xuab zeb, me me ntawm cov cement, thiab qee qhov sib xyaw nrog gypsum). Tus Tswv, tab sis tseem muaj ntau qhov chaw uas cov phab ntsa yog plastered nrog txiv qaub thiab plaster. Feem ntau ntawm cov ntaub ntawv phab ntsa yog alkaline. Tom qab lub putty kov phab ntsa, qee qhov dej yuav nqus los ntawm phab ntsa. Tom qab hydrolysis thiab oxidation, qee yam khoom, xws li alkali thiab hlau, yuav tawm los ntawm cov hws me me ntawm phab ntsa. Ib qho tshuaj tiv thaiv tshwm sim, ua rau saum npoo ntawm putty tig daj.
Yog vim li cas 6. Lwm yam. Ntxiv nrog rau cov xwm txheej saum toj no, yuav muaj lwm yam, uas yuav tsum tau tshawb nrhiav ntxiv.
Tshuaj tiv thaiv dej-resistant putty rov qab mus rau daj:
Txoj Kev 1. Siv tus neeg saib xyuas rov qab rau kev sib khi rov qab.
Txoj Kev 2. Rau kev kho kom zoo nkauj ntawm phab ntsa qub, cov khoom siv qis qis uas tsis muaj dej-resistant thiab yooj yim rau pulverize tau raug khawb ua ntej. Ua ntej siv high-qib dej-resistant putty, kev kho mob yuav tsum tau ua ua ntej. Txoj kev yog: thawj cov tshuaj tsuag dej kom ntub cov phab ntsa saum npoo, thiab siv lub spatula los so nws Tshem tawm tag nrho cov qub putty thiab pleev xim (txog rau hauv qab tawv) thiab ntxuav nws. Tom qab cov phab ntsa qhuav tag, ntxuav nws dua thiab siv tus neeg sawv cev rov qab los npog cov kev kho rov qab, tom qab ntawd txhuam cov dej-resistant putty. daj.
Txoj Kev 3. Zam tsis txhob muaj cov pa hluav taws xob tsis zoo thiab cov foob pob hluav taws. Thaum lub sij hawm tsim kho, tshwj xeeb tshaj yog thaum lub putty tsis qhuav kiag li tom qab kev tsim kho, tsis txhob haus luam yeeb los yog teeb hluav taws nyob rau hauv tsev rau cua sov, thiab tsis txhob siv volatile tshuaj xws li xim thiab nws thinners nyob rau hauv tsev nyob rau hauv peb lub hlis.
Txoj Kev 4. Khaws qhov chaw kom cua thiab qhuav. Ua ntej cov dej-resistant putty yuav qhuav tag, tsis txhob kaw lub qhov rooj thiab qhov rais kom nruj, tab sis qhib lub qhov rais rau qhov cua, kom lub putty txheej yuav qhuav sai li sai tau.
Txoj Kev 5. Ib qho tsim nyog ntawm 462 hloov kho ultramarine tuaj yeem muab ntxiv rau cov dej-resistant putty. Cov txheej txheem tshwj xeeb: Raws li qhov piv ntawm 462 hloov kho ultramarine: putty hmoov = 0.1: 1000, ua ntej ntxiv ultramarine rau hauv ib qho dej, do kom yaj thiab lim, ntxiv cov tshuaj ultramarine aqueous thiab dej rau hauv lub thawv, thiab tom qab ntawd nias lub pob. Tag nrho cov dej: putty hmoov = 0.5: 1 qhov hnyav piv, muab cov hmoov putty rau hauv lub thawv, do nws tusyees nrog ib tug tov khoom los tsim ib tug creamy mis nyuj, thiab ces siv. nws. Qhov kev sim qhia tau hais tias ntxiv qee qhov nyiaj ntawm ultramarine xiav tuaj yeem tiv thaiv qhov chaw ntawm putty los ntawm kev tig daj mus rau qee yam.
Txoj kev 6. Rau putty uas tau tig daj, kev kho mob yuav tsum tau. Txoj kev kho dav dav yog: ua ntej siv cov primer rau saum npoo ntawm lub putty, thiab tom qab ntawd txhuam thiab siv cov qib siab dej-resistant putty lossis txhuam sab hauv phab ntsa latex xim.
Sau cov ntsiab lus saum toj no:
Qhov saum npoo yellowing ntawm dej-resistant putty thiab imitation porcelain xim muaj ntau yam xws li raw cov ntaub ntawv, ib puag ncig tej yam kev mob, kev nyab xeeb tej yam kev mob, phab ntsa hauv paus, kev tsim kho technology, thiab lwm yam. Nws yog ib qho teeb meem nyuaj, thiab xav tau kev tshawb fawb thiab kev sib tham ntxiv.
Lub sij hawm xa tuaj: Plaub Hlis-28-2024