Kodi ndi ntchito ziti ndi zofunika za zida zosiyanasiyana mu matope odziyimira pawokha a gypsum?

(1) Gypsum

Malinga ndi zida zomwe zimagwiritsidwa ntchito, zimagawidwa kukhala mtundu wa II anhydrite ndi α-hemihydrate gypsum.Zida zomwe amagwiritsa ntchito ndi:

① Type II anhydrous gypsum

Gypsum yowonekera kapena alabasitala yokhala ndi kalasi yapamwamba komanso yofewa iyenera kusankhidwa.Kutentha kwa calcination kuli pakati pa 650 ndi 800 ° C, ndipo hydration ikuchitika pansi pa activator.

②-Gypsum hemihydrate

-The luso kupanga hemihydrate gypsum makamaka zikuphatikizapo youma kutembenuka ndondomeko ndi chonyowa kutembenuka ndondomeko makamaka kaphatikizidwe madzi m'thupi ndi kuyanika.

(2) Simenti

Pokonzekera gypsum yodzikweza, simenti yaying'ono imatha kuwonjezeredwa, ndipo ntchito zake zazikulu ndi izi:

① Perekani malo okhala ndi alkaline pazosakaniza zina;

② Kupititsa patsogolo kufewetsa kwa thupi lolimba la gypsum;

③ Kupititsa patsogolo slurry fluidity;

④Sinthani nthawi yokhazikitsira mtundu Ⅱ gypsum wodziyimira pawokha wa anhydrous gypsum.

Simenti yogwiritsidwa ntchito ndi 42.5R Portland simenti.Pokonzekera gypsum yodziyimira payokha, simenti yoyera ya Portland ingagwiritsidwe ntchito.Kuchuluka kwa simenti yowonjezeredwa sikuloledwa kupitirira 15%.

(3) Kukhazikitsa wowongolera nthawi

Mu matope a gypsum wodziyimira pawokha, ngati mtundu wa II anhydrous gypsum utagwiritsidwa ntchito, chowonjezera chowonjezera chiyenera kugwiritsidwa ntchito, ndipo ngati -hemihydrate gypsum ikugwiritsidwa ntchito, nthawi zambiri imayenera kugwiritsidwa ntchito pobwezeretsa.

① Coagulant: Amapangidwa ndi sulfates osiyanasiyana ndi mchere wawo wawiri, monga calcium sulfate, ammonium sulfate, potaziyamu sulfate, sodium sulfate ndi alums osiyanasiyana, monga alum (aluminium potassium sulfate), red alum (potassium dichromate), bile alum ( mkuwa sulphate), etc.:

②Woletsa:

Citric acid kapena trisodium citrate ndi gypsum retarder yomwe imagwiritsidwa ntchito kwambiri.Imasungunuka mosavuta m'madzi, imakhala ndi zotsatira zowoneka bwino komanso mtengo wotsika, komanso imachepetsanso mphamvu ya thupi lolimba la gypsum.Zina za gypsum retarders zomwe zingagwiritsidwe ntchito ndi monga: guluu, guluu wa casein, zotsalira za wowuma, tannic acid, tartaric acid, etc.

(4) Njira yochepetsera madzi

Kuthamanga kwa gypsum yodzipangira nokha ndi nkhani yofunika kwambiri.Pofuna kupeza gypsum slurry ndi madzi abwino, kuonjezera kumwa madzi kokha kudzachititsa kuti mphamvu ya gypsum ikhale yolimba, komanso ngakhale kutuluka magazi, zomwe zidzapangitsa kuti pamwamba pakhale lofewa, kutaya ufa, ndipo sangathe kugwiritsidwa ntchito.Chifukwa chake, gypsum water reducer iyenera kuyambitsidwa kuti muwonjezere madzi a gypsum slurry.Ma superplasticizers oyenera kukonzekera gypsum yodziyimira pawokha amaphatikiza ma superplasticizers opangidwa ndi naphthalene, polycarboxylate apamwamba kwambiri apulasitiki, ndi zina zambiri.

(5) Wosunga madzi

Pamene gypsum slurry yodziyimira yokha imadziyendetsa yokha, madzi amadzimadzi amadzimadzi amachepetsedwa chifukwa cha kuyamwa kwa madzi m'munsi.Kuti mupeze gypsum slurry yabwino yodziyimira nokha, kuwonjezera pamadzi ake kuti mukwaniritse zofunikira, slurry iyeneranso kukhala ndi madzi osungira bwino.Ndipo chifukwa fineness ndi mphamvu yokoka yeniyeni ya gypsum ndi simenti m'munsi zinthu zosiyana kwambiri, slurry sachedwa delamination pa otaya ndondomeko ndi malo amodzi kuumitsa ndondomeko.Pofuna kupewa zochitika zomwe zili pamwambazi, m'pofunika kuwonjezera pang'ono posungira madzi.Mankhwala osunga madzi nthawi zambiri amagwiritsa ntchito zinthu za cellulose, monga methyl cellulose, hydroxyethyl cellulose ndi carboxypropyl cellulose.

(6) polima

Sinthani ma abrasion, crack and water resistance of self-leveling materials pogwiritsa ntchito ma polima a ufa

(7) Defoamer Kuchotsa thovu la mpweya lomwe limapangidwa panthawi yosakaniza zinthu, tributyl phosphate imagwiritsidwa ntchito.

(8) filler

Amagwiritsidwa ntchito popewa kupatukana kwa zigawo zakuthupi zodzipangira okha kuti akhale ndi madzi abwino.Zodzaza zomwe zingagwiritsidwe ntchito, monga dolomite, calcium carbonate, phulusa la ntchentche pansi, slag pansi pamadzi, mchenga wabwino, etc.

(9) Kuphatikizika bwino

Cholinga chowonjezera chophatikizira chabwino ndikuchepetsa kuyanika kwa thupi lodzilimbitsa la gypsum, kukulitsa mphamvu yapamtunda ndi kukana kwa thupi lolimba, komanso kugwiritsa ntchito mchenga wa quartz.

Kodi zinthu zofunika pa gypsum self-leveling mortar ndi chiyani?

The β-mtundu hemihydrate gypsum analandira ndi calcining woyamba kalasi dihydrate gypsum ndi chiyero oposa 90% kapena α-mtundu hemihydrate gypsum akamagwira autoclaving kapena hydrothermal synthesis.

Yogwira admixture: kudziona leveling zipangizo angagwiritse ntchito ntchentche phulusa, slag ufa, etc. monga yogwira admixtures, cholinga ndi kusintha tinthu gradation wa zinthu ndi kusintha ntchito ya zinthu anaumitsa thupi.Slag ufa umakhala ndi hydration reaction m'malo amchere, omwe amatha kuwongolera kuphatikizika komanso kulimba kwazinthu zakuthupi.

Zida zopangira simenti zoyambirira: Pofuna kutsimikizira nthawi yomanga, zida zodziyimira pawokha zimakhala ndi zofunika zina zamphamvu zoyambira (makamaka 24h flexural and compressive strength).Simenti ya sulphoaluminate imagwiritsidwa ntchito ngati zida zoyambira zolimba.Simenti ya sulphoaluminate imakhala ndi liwiro la hydration komanso mphamvu yoyambirira, yomwe imatha kukwaniritsa zofunikira zamphamvu yoyambirira yazinthu.

Alkaline activator: Simenti yophatikizika ya gypsum imakhala ndi mphamvu zowuma kwambiri pansi pamikhalidwe yamchere.Quicklime ndi simenti 32.5 angagwiritsidwe ntchito kusintha pH mtengo kupereka malo amchere kuti hydration wa zinthu simenti.

Coagulant: Nthawi yoikika ndi chilolezo chofunikira cha zida zodzipangira zokha.Nthawi yayifupi kapena yayitali siyenera kumanga.The coagulant kumapangitsa ntchito gypsum, Iyamba Kuthamanga ndi supersaturated crystallization liwiro la dihydrate gypsum, kufupikitsa nthawi yokhazikitsira, ndipo amasunga zoikamo ndi kuumitsa nthawi ya zipangizo kudziletsa mu osiyanasiyana wololera.

Wochepetsera madzi: Pofuna kukonza kuphatikizika ndi kulimba kwa zida zodziyimira pawokha, ndikofunikira kuchepetsa chiŵerengero cha madzi-binder.Pansi pa chikhalidwe chokhala ndi madzi abwino a zipangizo zodzipangira okha, m'pofunika kuwonjezera zochepetsera madzi.Madzi ochepetsa madzi a naphthalene amagwiritsidwa ntchito, ndipo njira yake yochepetsera madzi ndi yakuti gulu la sulfonate mu molekyulu yochepetsera madzi ya naphthalene ndi madzi amadzimadzi amagwirizanitsidwa ndi ma hydrogen bonds, kupanga filimu yokhazikika yamadzi pamwamba pa gelled. zakuthupi, zomwe zimapangitsa kuti zikhale zosavuta kupanga madzi pakati pa tinthu tating'onoting'ono.Kutsetsereka, potero kuchepetsa kuchuluka kwa kusakaniza madzi chofunika ndi kukonza dongosolo la oumitsa thupi la zinthu.

Wosungira madzi: Zida zodziyimira pawokha zimapangidwira pansi, ndipo makulidwe ake ndi ochepa kwambiri, ndipo madzi amatengedwa mosavuta ndi pansi, zomwe zimapangitsa kuti zinthuzo zikhale zosakwanira, kung'ambika pamwamba, ndikuchepa. mphamvu.Pakuyezetsa uku, methyl cellulose (MC) idasankhidwa ngati wothandizira kusunga madzi.MC imakhala ndi kunyowa kwabwino, kusunga madzi komanso kupanga mafilimu, kotero kuti zinthu zodziyimira pawokha sizimakhetsa magazi komanso zimakhala ndi madzi okwanira.

Redispersible latex ufa (omwe tsopano umatchedwa latex powder): ufa wa latex ukhoza kuonjezera zotanuka modulus ya zipangizo zodzipangira nokha, kupititsa patsogolo kukana kwa ming'alu, mphamvu zamagwirizano ndi kukana madzi.

Defoamer: Defoamer imatha kusintha mawonekedwe azinthu zodzipangira okha, kuchepetsa thovu pomwe zinthuzo zimapangika, komanso kukhala ndi zotsatirapo zake pakuwongolera mphamvu zazinthuzo.