Cellulose ethers inowanzoshandiswa sezvinowedzera muzvinhu zvekuvaka nekuda kwekugona kwavo kugadzirisa rheological uye mechanical properties yezvinyorwa. Kunyanya, ivo vanowanzobatanidzwa mune gypsum mortars kuvandudza fluidity, kushanda uye kunamatira. Nekudaro, iyo chaiyo mhedzisiro ye cellulose ether viscosity pakuita kwegypsum mortar haisati yajekeswa. Iri bepa rinoongorora zvinyorwa zviripo pamusoro pechinyorwa ichi uye rinokurukura zvingangoitika zve cellulose ether viscosity pazvinhu zvegypsum mortars.
Cellulose ethers mapolymer anonyungudika nemvura anobva ku cellulose, polima yechisikigo inowanikwa mumadziro esero rezvirimwa. Iwo anowanzo shandiswa semakobvu, mabhainda uye anodzikamisa mune akasiyana maindasitiri ekushandisa anosanganisira chikafu, zvizorwa, mishonga uye zvekuvakisa. Mukuvaka, ivo vanowanzobatanidzwa mumatope kuti vavandudze kushanda, kunamatira uye kusimba.
Gypsum iminerari yechisikigo inoumbwa necalcium sulfate dihydrate. Iyo inoshandiswa zvakanyanya mukuvaka kune yayo-inodzivirira moto zvimiro uye inonzwika uye yekupisa yekupisa zvivakwa. Gypsum dhaka inowanzoshandiswa seprimer yemadziro e stucco uye sirin'i, pamwe nekupedzisa basa rekuvaka drywall.
Kana cellulose ether yakawedzerwa kune gypsum mortar, inogona kuchinja rheological properties yemusanganiswa. Rheology chidzidzo che deformation uye kuyerera kwezvinhu zviri pasi pekunetseka. Kuyerera kwemaitiro egypsum mortar kunogona kuratidzwa neayo viscosity, iyo chiyero chekuramba kwayo kuyerera. Iyo viscosity yedhaka inopesvedzerwa nezvinhu zvakati wandei, zvinosanganisira mhando uye kusungirirwa kwe cellulose ether, saizi yechikamu uye kugovera kwegypsum, uye chiyero chemvura kune simende.
Yepamusoro viscosity cellulose ethers inowanzova nekurudziro huru pakuyerera kwegypsum mortar pane yakaderera viscosity ethers. Semuenzaniso, zvidzidzo zvakaratidza kuti kuwedzera high-viscosity hydroxypropylmethylcellulose (HPMC) kune gypsum mortar inogona kuwedzera viscosity yemusanganiswa uye kunatsiridza kushanda kwayo, nepo yakaderera-viscosity HPMC haina mhedzisiro yekuyerera kwedhaka. Izvi zvinoratidza kuti kushanda kwegypsum mortar kunoenderana nemhando chaiyo uye viscosity ye cellulose ether inoshandiswa.
Imwe yemabhenefiti makuru ekubatanidza cellulose ether mu gypsum mortar ndeyekuti inovandudza kushanda kwemusanganiswa. Kurongeka (Processability) zvinoreva nyore kusanganisa, kuiswa nekukochekedzwa. Kushanda kwepamusoro gypsum mortars inogona kuiswa kune nzvimbo zviri nyore, zvichikonzera kupera kwakapfava, kwakafanana. Cellulose ethers inogona kuvandudza kushanda kwemusanganiswa nekuderedza chiitiko chekuparadzanisa uye kubuda ropa, izvo zvinoitika kana zvimedu zvinorema mudhaka zvinogara kunze kwekusanganiswa panguva yekuvaka.
Pamusoro pekukanganisa kushanda, iyo viscosity ye cellulose ether inokanganisawo kuita kwekunamatira kwegypsum mortar. Adhesion ndiko kugona kwechinhu kubatanidza kune imwe nzvimbo. Kuvapo kwe cellulose ether mu gypsum mortar kunogona kuvandudza kunamatira kwayo kune nzvimbo nekuwedzera nzvimbo yekusangana uye kuderedza huwandu hwemhepo yakavharirwa pakati penzvimbo. High-viscosity cellulose ethers inoshanda zvakanyanya pane yakaderera-viscosity ether pakuvandudza kunamatira nekuti inogadzira chisungo chakasimba pakati penzvimbo.
Chimwe chinhu chakakosha chegypsum mortar inguva yekugadzika, nguva inotora kuti musanganiswa uome uye uwedzere simba. Nguva yekugadzirisa yegypsum mortar inogona kuchinjwa nekuwedzera cellulose ether, iyo inogona kukanganisa hydration process yegypsum particles. Hydration ndiko kuita kwemakemikari kunoitika kana mvura yawedzerwa kugypsum, zvichikonzera kuumbwa kwecalcium sulfate dihydrate makristasi.
Iyo viscosity ye cellulose ether ine zvakakosha pakuita kwegypsum mortar. Yakakwira viscosity cellulose ethers inogona kuvandudza processability, adhesive zvivakwa uye kuseta nguva yemusanganiswa, nepo yakaderera viscosity ethers inogona kuita zvishoma pane izvi zvivakwa. Mhedzisiro chaiyo ye cellulose ether viscosity inoenderana nezvinhu zvakawanda, kusanganisira mhando uye kusungirirwa kweether, saizi yechikamu uye kugovera kwegypsum, uye chiyero chemvura kune simende. Imwe tsvakurudzo inodiwa kuti unzwisise zvizere hukama huri pakati pe cellulose ether viscosity uye gypsum mortar properties, asi zvinyorwa zviripo zvinoratidza kuti ichi chinhu chakakosha kufunga nezvekugadzira zvinhu zvekuvaka.
Nguva yekutumira: Aug-15-2023