Kazhinji kutaura, iyo yakakwirira viscosity, zviri nani kuchengetedza mvura kwegypsum mortar. Zvisinei, iyo yakakwirira ye viscosity, iyo yakakwirira ye molecular huremu hwe cellulose ether, uye kuderera kunowirirana mukunyungudika kwayo kuchava nemigumisiro yakaipa pakusimba uye kushanda kwekuvaka kwedhaka. Iyo yakakwirira viscosity, iyo inonyanya kuoneka iyo thickening maitiro padhaka, asi haina kuenzana zvakananga.
Iyo yakakwirira iyo viscosity, iyo yakanyanya viscous iyo dhaka rakanyorova richava. Panguva yekuvaka, inoratidzirwa sekunamatira kune scraper uye yakakwirira kunamatira kune substrate. Asi hazvibatsiri kuwedzera simba rekuumbwa kwevhu rakanyorova pacharo. Mukuwedzera, panguva yekuvaka, iyo anti-sag kuita kwevhu rakanyorova haisi pachena. Pane zvinopesana, imwe yepakati uye yakaderera viscosity asi yakagadziridzwa methyl cellulose ethers ine yakanakisa mashandiro mukuvandudza kusimba kwechimiro chedhaka rakanyorova.
Zvivako zvemadziro ekuvaka kazhinji zvimiro zveporous, uye ese ane simba rekunyudza mvura. Nekudaro, iyo gypsum yekuvakisa inoshandiswa pakuvaka madziro inogadzirwa nekuwedzera mvura kumadziro, uye mvura inonyudzwa nyore nemadziro, zvichikonzera kushaikwa kwemvura inodiwa ye hydration yegypsum, zvichikonzera kunetsa mukuvaka plaster uye kuderedzwa. chisungo simba, zvichikonzera makatsemuka, Quality matambudziko akadai hollowing uye peeling. Kuvandudza kuchengetwa kwemvura kwezvinhu zvekuvaka zvegypsum zvinogona kuvandudza kunaka kwekuvaka uye simba rekubatanidza nemadziro. Naizvozvo, mumiriri wekuchengetedza mvura yave imwe yeakakosha musanganiswa wegypsum zvekuvaka zvinhu.
Kurovera gypsum, yakasungwa gypsum, caulking gypsum, gypsum putty uye zvimwe zvivakwa zvehupfu zvekuvaka zvinoshandiswa. Kuti zvive nyore kuvaka, gypsum retarders inowedzerwa panguva yekugadzirwa kuti iwedzere nguva yekuvaka yegypsum slurry. Nekuti gypsum inosanganiswa neRetarder, iyo inhibisa iyo hydration process yehemihydrate gypsum. Mhando iyi yegypsum slurry inoda kuchengetwa pamadziro kwemaawa 1 kusvika ku2 isati yagadzika. Mazhinji emadziro ane zvimiro zvekutora mvura, kunyanya madziro ezvidhina uye aerated kongiri. Wall, porous insulation board uye zvimwe zvinyoro zvitsva zvemadziro zvinhu, saka kurapwa kwemvura kunofanirwa kuitwa pane gypsum slurry kudzivirira kutamiswa kwechikamu chemvura muslurry kumadziro, zvichikonzera kushomeka kwemvura uye isina kukwana hydration kana gypsum. slurry yakaoma. Kukonzera kupatsanurwa uye kupeuka kwejoinhi pakati pegypsum nemadziro emadziro. Kuwedzerwa kwemvura-inochengetedza mumiriri ndeyekuchengetedza hunyoro huri mugypsum slurry, kuve nechokwadi chekuita kwe hydration ye gypsum slurry pane interface, kuitira kuve nechokwadi chesimba rekubatanidza. Inowanzo shandiswa kuchengetedza mvura inonzi cellulose ethers, yakadai se: methyl cellulose (MC), hydroxypropyl methyl cellulose (HPMC), hydroxyethyl methyl cellulose (HEMC), nezvimwewo. Uyezve, polyvinyl alcohol, sodium alginate, modified starch, diatomaceous earth, zvisingawanzo pasi poda, nezvimwewo zvinogonawo kushandiswa kuvandudza mashandiro ekuchengetedza mvura.
Hazvina mhosva kuti rudzii rwemvura inochengetedza mumiriri inogona kunonoka hydration mwero wegypsum kune akasiyana madhigirii, kana huwandu hwekudzoreredza hunoramba husina kuchinjika, mumiriri anochengetedza mvura anogona.
kazhinji kudzoreredza kuseta kwemaminetsi 15-30. Nokudaro, chiyero che retarder chinogona kuderedzwa zvakakodzera.
Nguva yekutumira: Nov-24-2022