Plastering plaster yuav yog lub ntsiab ntawm sab hauv phab ntsa plastering yav tom ntej
Lub plastering gypsum siv rau sab hauv phab ntsa muaj cov yam ntxwv ntawm lub teeb yuag, nqus dej noo, suab rwb thaiv tsev, thiab muaj zog nyob hauv kev nplij siab. Gypsum plastering cov ntaub ntawv yuav dhau los ua lub ntsiab ntawm sab hauv phab ntsa plastering yav tom ntej.
Lub hemihydrate gypsum siv rau sab hauv phab ntsa plastering niaj hnub no feem ntau yog β-hemihydrate gypsum, thiab hemihydrate desulfurized gypsum, los yog ntuj gypsum, los yog phosphogypsum uas ua tau raws li kev tiv thaiv ib puag ncig yog feem ntau siv. Lub zog ntawm gypsum lub cev txawv ntawm 2.5 MPa rau 10 MPa. Qhov zoo ntawm hemihydrate gypsum ua los ntawm gypsum manufacturers yog txawv heev vim qhov sib txawv ntawm raw khoom keeb kwm thiab txheej txheem.
Formula Design of Plastering Gypsum for Engineering
Lub plastering gypsum siv hauv engineering feem ntau yog hnyav thiab xuab zeb plastering gypsum. Vim lub cheeb tsam loj, lub thickness ntawm leveling yog ntau tshaj 1 cm. Cov neeg ua haujlwm yuav tsum tau ua kom nrawm nrawm, yog li gypsum yuav tsum muaj thixotropy zoo. Zoo scraping, lub teeb tes zoo nkaus li, yooj yim kom raug rau lub teeb thiab lwm yam.
tsom xam:
1. Kev ua tau zoo leveling. Cov xuab zeb gradation zoo dua, siv cov xuab zeb nruab nrab nrog cov xuab zeb zoo.
2. Zoo thixotropy. Nws yog qhov yuav tsum tau ua kom cov khoom ntim ntawm cov khoom zoo dua. Yuav nrhiav tau tuab, kuj nrhiav tau nyias.
3. Tsis poob ntawm lub zog. Siv cov amino acid retarder, xws li Italian Plast Retard PE.
Daim ntawv qhia rau engineering plastering gypsum:
β-hemihydrate desulfurized gypsum: 250 kg (lub zog ntawm gypsum yog li 3 MPa)
150-200 mesh hnyav calcium: 100 kg (hnyav calcium tsis yooj yim kom zoo heev)
1.18-0.6mm xuab zeb: 400 kg (14 mesh-30 mesh)
0.6-0.075mm xuab zeb: 250 kg (30 mesh-200 mesh)
HPMC-40,000: 1.5 kg (Nws raug nquahu kom ntxuav HPMC peb zaug, cov khoom ntshiab, tsis muaj gypsum blooming, tsis muaj viscosity, zoo txhais tes, thiab me me air-entraining ntim).
Rheological tus neeg saib xyuas YQ-191/192: 0.5 kg (anti-sag, nce filling, lub teeb txhais tes, zoo tag).
Plast Retard PE: 0.1 kg (khoom noj tsis tas, kho raws li lub sijhawm coagulation, protein, tsis muaj zog poob).
Raw khoom piv txwv:
1.18-0.6 hli xuab zeb
0.6-0.075mm xuab zeb
β hemihydrate desulfurized gypsum (txog 200 mesh)
Cov yam ntxwv ntawm cov qauv no yog: kev tsim kho zoo, lub zog ceev. Yooj yim rau theem, tus nqi qis, zoo stability, tsis yooj yim rau tawg. Haum rau engineering.
Tham los ntawm kev paub
1. Lub gypsum rov qab los ntawm txhua batch yuav tsum tau soj ntsuam nrog cov qauv tsim los xyuas kom meej tias lub sij hawm teem tsis tau hloov los yog nyob rau hauv lub controllable ntau yam. Txwv tsis pub, lub sijhawm teem sijhawm ntev dhau lawm thiab nws yooj yim tawg. Yog tias lub sijhawm luv luv, lub sijhawm tsim kho tsis txaus. Feem ntau, lub sijhawm pib ntawm tus qauv tsim yog 60 feeb, thiab lub sijhawm teem sijhawm kawg ntawm gypsum yog ze rau lub sijhawm pib.
2. Cov av nkos ntawm cov xuab zeb yuav tsum tsis txhob loj heev, thiab cov av nkos yuav tsum tau tswj ntawm 3%. Cov av nkos ntau dhau yog yooj yim tawg.
3. HPMC, tsawg viscosity, siab zoo yog pom zoo. HPMC ntxuav peb zaug muaj ntsev tsawg, thiab gypsum mortar muaj Frost tsawg. Qhov no hardness thiab lub zog yog OK
4. Thaum sib tov cov hmoov qhuav, lub sij hawm sib tov yuav tsum tsis txhob ntev dhau. Tom qab tag nrho cov khoom xyaw yog pub, do rau 2 feeb. Rau cov hmoov qhuav, qhov sib tov ntev dua, qhov zoo dua. Tom qab ib tug ntev lub sij hawm, tus retarder kuj yuav ploj. Nws yog ib qho teeb meem ntawm kev paub.
5. Kev kuaj xyuas cov khoom. Nws raug nquahu kom coj mus kuaj thiab tshuaj xyuas cov khoom tiav los ntawm qhov pib, nruab nrab thiab kawg ntawm txhua lub lauj kaub. Nyob rau hauv txoj kev no, koj yuav pom tias lub sijhawm teem sijhawm sib txawv, thiab cov retarder yuav tsum tau kho kom haum raws li qhov xav tau.
Post lub sij hawm: Jan-18-2023