Cov yam tseem ceeb rau qhov daj ntawm qhov chaw ntawm cov dej-resistant putty Tom qab kev tshawb fawb txog cov ntaub ntawv, ntau qhov kev sim thiab kev xyaum ua haujlwm engineering, tus sau ntseeg tias cov yam tseem ceeb rau qhov daj ntawm qhov chaw ntawm cov dej-resistant putty yog raws li nram no:
Vim li cas 1. Calcium hydroxide (tshauv calcium hmoov) rov qab mus rau alkali ua rau daj Calcium hydroxide, mis molecular Ca (OH) 2, qhov hnyav molecular 74, melting point 5220, pH tus nqi ≥ 12, muaj zog alkaline, hmoov dawb zoo, me ntsis yaj hauv dej, yaj hauv acid, glycerin, qab zib, ammonium chloride, yaj hauv acid kom tso tawm ntau cua sov, qhov ceev yog 2.24, nws cov kua dej ntshiab yog cov kua alkaline pob tshab tsis muaj xim, tsis muaj ntxhiab, maj mam nqus, calcium oxide ua calcium carbonate. Calcium hydroxide yog alkaline muaj zog nruab nrab, nws cov alkalinity thiab corrosiveness tsis muaj zog dua sodium hydroxide, calcium hydroxide thiab nws cov kua dej yog corrosive rau tib neeg daim tawv nqaij, khaub ncaws, thiab lwm yam, tab sis tsis muaj tshuaj lom, thiab yuav tsum tsis txhob sib cuag ncaj qha nrog daim tawv nqaij ntev.
Calcium hydroxide yog ib qho khoom siv rau hauv cov putty uas tiv taus dej los ua ib zaj duab xis tawv nrog cov calcium carbonate hnyav thiab cov hmoov roj hmab ci ntsa iab. Vim nws muaj zog alkalinity thiab cov alkali ntau, ib feem ntawm cov dej hauv putty yuav raug nqus los ntawm lub hauv paus phab ntsa thaum lub sijhawm tsim kho. Tib lub hauv qab cement mortar alkaline muaj zog, lossis hauv qab xuab zeb-lime (lime, xuab zeb, me ntsis cement) raug nqus, thaum cov txheej putty maj mam qhuav thiab dej vaporized, cov tshuaj alkaline hauv cov av mortar thiab putty thiab qee qhov ntawm lawv tsis ruaj khov tom qab hydrolysis. Cov tshuaj hauv putty (xws li ferrous iron, ferric iron, thiab lwm yam) yuav tawm los ntawm cov qhov me me ntawm putty, thiab kev tshuaj lom neeg yuav tshwm sim tom qab ntsib huab cua, ua rau qhov chaw ntawm putty tig daj.
Vim li cas 2. Cov pa roj av uas yaj tau yooj yim. Xws li carbon monoxide (CO), sulfur dioxide (SO2), benzene, toluene, xylene, formaldehyde, pyrotechnics, thiab lwm yam. Hauv qee qhov xwm txheej engineering, muaj cov xwm txheej uas qhov chaw putty tau tig daj vim yog siv xim thiab hluav taws kom sov hauv chav uas cov putty tiv taus dej tau raug khawb, lossis txawm tias hlawv tshuaj tsw qab hauv chav, thiab ntau tus neeg haus luam yeeb tib lub sijhawm.
Vim li cas 3. Qhov cuam tshuam ntawm huab cua thiab tej yam ib puag ncig. Nyob rau sab qaum teb, thaum lub sijhawm sib pauv caij, qhov chaw ntawm cov putty feem ntau hloov daj txij lub Kaum Ib Hlis mus txog lub Tsib Hlis ntawm lub xyoo tom ntej, tab sis qhov no tsuas yog ib qho xwm txheej cais tawm xwb.
Vim li cas 4. Qhov cua thiab qhov ziab tsis zoo. Phab ntsa ntub dej. Tom qab khawb cov putty uas tiv taus dej, yog tias txheej putty tsis qhuav tag, kaw lub qhov rooj thiab qhov rai ntev yuav ua rau qhov chaw ntawm putty tig daj.
Vim li cas 5. Cov teeb meem hauv paus. Hauv qab ntawm phab ntsa qub feem ntau yog phab ntsa xuab zeb-grey (txiv qaub ntsuab, xuab zeb, me ntsis ntawm cov cement, thiab qee qhov sib xyaw nrog gypsum). Vajtswv, tab sis tseem muaj ntau qhov chaw uas cov phab ntsa tau plastered nrog txiv qaub ntsuab thiab plaster. Feem ntau ntawm cov ntaub ntawv phab ntsa yog alkaline. Tom qab cov putty kov phab ntsa, qee cov dej yuav raug nqus los ntawm phab ntsa. Tom qab hydrolysis thiab oxidation, qee cov tshuaj, xws li alkali thiab hlau, yuav tawm los ntawm cov qhov me me ntawm phab ntsa. Ib qho tshuaj lom neeg tshwm sim, ua rau qhov chaw ntawm putty tig daj.
Vim li cas 6. Lwm yam tseem ceeb. Ntxiv rau cov yam uas ua tau saum toj no, yuav muaj lwm yam uas yuav tsum tau tshawb nrhiav ntxiv.
Kev daws teeb meem los tiv thaiv cov putty uas tsis muaj dej rov qab mus rau daj:
Txoj Kev 1. Siv cov tshuaj uas kaw rov qab rau kev kaw rov qab.
Txoj Kev 2. Rau kev kho kom zoo nkauj phab ntsa qub, cov putty qis uas tsis tiv taus dej thiab yooj yim rau pulverize tau raug khawb ua ntej. Ua ntej siv cov putty tiv taus dej zoo, kev kho mob yuav tsum tau ua ua ntej. Txoj kev yog: ua ntej txau dej kom ntub phab ntsa, thiab siv spatula los so nws Tshem tawm tag nrho cov putty qub thiab xim (kom txog thaum hauv qab tawv) thiab ntxuav nws. Tom qab phab ntsa qhuav tag, ntxuav nws dua thiab siv tus neeg sawv cev backing los npog cov kev kho mob backing, tom qab ntawd khawb cov putty tiv taus dej. daj.
Txoj Kev 3. Tsis txhob siv cov pa tshuaj uas yaj tau thiab cov foob pob hluav taws. Thaum lub sijhawm tsim kho, tshwj xeeb tshaj yog thaum cov putty tsis qhuav tag tom qab tsim kho, tsis txhob haus luam yeeb lossis ua hluav taws hauv tsev kom sov, thiab tsis txhob siv cov tshuaj uas yaj tau xws li xim thiab nws cov tshuaj thinner hauv tsev hauv peb lub hlis.
Txoj Kev 4. Khaws qhov chaw kom muaj cua nkag thiab qhuav. Ua ntej cov putty uas tiv taus dej qhuav tag, tsis txhob kaw qhov rooj thiab qhov rai kom nruj, tab sis qhib qhov rai kom muaj cua nkag, kom cov txheej putty qhuav sai li sai tau.
Txoj Kev 5. Koj tuaj yeem ntxiv 462 modified ultramarine rau hauv cov putty uas tiv taus dej. Txoj kev tshwj xeeb: Raws li qhov sib piv ntawm 462 modified ultramarine: putty hmoov = 0.1: 1000, ua ntej ntxiv ultramarine rau hauv qee qhov dej, do kom yaj thiab lim, ntxiv cov kua dej ultramarine thiab dej rau hauv lub thawv, thiab tom qab ntawd nias tag nrho cov dej: putty hmoov = 0.5: 1 qhov hnyav piv, muab cov hmoov putty rau hauv lub thawv, do kom sib npaug nrog lub tshuab sib tov kom ua rau mis nyuj creamy, thiab tom qab ntawd siv nws. Qhov kev sim qhia tau hais tias kev ntxiv qee qhov ultramarine xiav tuaj yeem tiv thaiv qhov chaw ntawm putty kom tsis txhob tig daj mus rau qee qhov.
Txoj Kev 6. Rau cov putty uas tau hloov daj, yuav tsum tau kho kom zoo. Txoj kev kho dav dav yog: ua ntej thov cov xim pleev rau ntawm qhov chaw ntawm cov putty, thiab tom qab ntawd khawb thiab siv cov xim pleev uas tsis muaj dej lossis txhuam rau sab hauv phab ntsa.
Sau cov ntsiab lus saum toj no ua ntu zus:
Qhov daj ntawm cov xim pleev xim uas tsis muaj dej thiab cov xim pleev xim cuav muaj ntau yam xws li cov khoom siv raw, cov xwm txheej ib puag ncig, huab cua, lub hauv paus phab ntsa, kev siv tshuab ua vaj tse, thiab lwm yam. Nws yog ib qho teeb meem nyuaj heev, thiab xav tau kev tshawb fawb thiab kev sib tham ntxiv.
Lub sijhawm tshaj tawm: Plaub Hlis-28-2024