Viscosity chinhu chakakosha pakushanda kwe cellulose ether.
Kazhinji, kana viscosity yakakwira, gypsum mortar inochengetedza mvura zviri nani. Zvisinei, viscosity yakakwira, uremu hwemamorekuru e cellulose ether hunowedzera, uye kudzikira kwekunyungudika kwayo kuchaita kuti simba remortar rive rakaipa uye mashandiro ekuvaka. Viscosity yakakwira, zvinoita kuti torque iwedzere kusimba, asi haina kuenzana zvakananga.
Kana viscosity yakakwira, ndipo panonyanya kusimba dhaka rakanyorova. Panguva yekuvaka, rinoratidzwa sekunamatira pachinhu chinokwenya uye kunamira zvakanyanya kune substrate. Asi hazvibatsire zvakanyanya kuwedzera simba rechimiro chedhaka rakanyorova. Pamusoro pezvo, panguva yekuvaka, kushanda kwedhaka rakanyorova hakuonekwe. Kusiyana neizvi, mamwe maether emethyl cellulose ane viscosity yepakati nepasi asi akagadziriswa ane mashandiro akanaka mukuvandudza simba rechimiro chedhaka rakanyorova.
Zvinhu zvekuvaka madziro zvinonyanya kuva nemazimba ane maburi, uye zvese zvine mvura yakawanda. Zvisinei, zvinhu zvekuvaka zvegypsum zvinoshandiswa pakuvaka madziro zvinogadzirwa nekuwedzera mvura kumadziro, uye mvura inonyudzwa nyore nyore nemadziro, zvichikonzera kushaikwa kwemvura inodiwa pakunyorovesa gypsum, zvichikonzera matambudziko mukuvaka plaster uye kuderera kwesimba remabond, zvichikonzera kuputika, Matambudziko emhando yepamusoro akadai sekupwanyika kwegomba nekukweshwa. Kuvandudza kuchengetedza mvura kwezvinhu zvekuvaka zvegypsum kunogona kuvandudza kunaka kwekuvaka uye simba rekubatanidza nemadziro. Nokudaro, chinhu chinochengetedza mvura chave chimwe chezvinhu zvakakosha zvekugadzira zvegypsum.
Kupurasita gypsum, gypsum yakasungirirwa, gypsum yakavharika, gypsum putty nezvimwe zvinhu zveupfu hwekuvaka zvinoshandiswa. Kuti zvive nyore kuvaka, gypsum retarders dzinowedzerwa panguva yekugadzira kuti nguva yekuvaka gypsum slurry iwedzere. Sezvo gypsum ichisanganiswa neRetarder, iyo inodzivisa maitiro emvura yehemihydrate gypsum. Rudzi urwu rwe gypsum slurry runofanira kuchengetwa pamadziro kwe1 ~ 2H risati ranyura. Mazhinji emadziro ane hunhu hwekupinza mvura, kunyanya madziro ezvidhinha nekongiri ine mhepo. Madziro, bhodhi rekudzivirira rine maburi nezvimwe zvinhu zvitsva zvemadziro zvakareruka, saka kurapwa kwekuchengetedza mvura kunofanirwa kuitwa pa gypsum slurry kudzivirira kutamiswa kwechikamu chemvura muslurry kuenda kumadziro, zvichikonzera kushomeka kwemvura uye hydration isina kukwana kana gypsum slurry yaoma. Zvinokonzera kuparadzaniswa nekubviswa kwejoinhi pakati pe gypsum nepamusoro pemadziro. Kuwedzera kwechinhu chinochengetedza mvura ndechekuchengetedza hunyoro huri mu gypsum slurry, kuve nechokwadi chekuti gypsum slurry inogadziriswa sei panzvimbo, kuitira kuti kuve nechokwadi chekuti bonding strength. Zvinhu zvinonyanya kushandiswa kuchengetedza mvura zvinosanganisira cellulose ethers, dzakadai semethyl cellulose (MC), hydroxypropyl methyl cellulose (HPMC), hydroxyethyl methyl cellulose (HEMC), nezvimwewo. Pamusoro pezvo, polyvinyl alcohol, sodium alginate, modified starch, diatomaceous earth, rare earth powder, nezvimwewo zvinogona kushandiswawo kuvandudza mashandiro ekuchengetedza mvura.
Hazvina mhosva kuti rudzii rwechinhu chinochengetedza mvura chinogona kunonotsa mwero wemvura yegypsum kusvika padanho rakasiyana, kana chiyero chechinhu chinochengetedza mvura chikaramba chisina kuchinja, chinhu chinochengetedza mvura chinogona kunonotsa mamiriro acho kwemaminitsi gumi nemashanu kusvika makumi matatu. Nokudaro, huwandu hwechinhu chinochengetedza mvura hunogona kuderedzwa zvakakodzera.
Nguva yekutumira: Kukadzi-08-2023