Iyo yakawanda pH kukosha kwezvigadzirwa zvegypsum ine acidic kana kwayakarerekera. Ikozvino kune marudzi maviri egiredhi rekuvakahydroxypropyl methylcellulosepamusika: inononoka-kunyungudika cellulose uye instant cellulose (S). Instant cellulose haina kukodzera gypsum systems. Zvigadzirwa, kunyungudika kwakashata zvakanyanya pasi peacidic kana kusarerekera mamiriro, uye inononoka-kunyungudika hydroxypropyl methylcellulose inogona kunyungudika muzvigadzirwa zvegypsum, asi inononoka-kunyunguduka cellulose ine kusakosha kwakakosha, zviri nyore kuagglomerate (apo gypsum Mushure mekunge dhaka rinomutswa pamadziro kwechinguva chidiki diki, kutaridzika kwechinguva chidiki). Parizvino, muzvigadzirwa zvegypsum, kunyanya mumakina-sprayed gypsum mortar, zvinodikanwa kuti cellulose ether inogona kuparadzirwa zvizere uye kunyungudutswa munguva pfupi, izvo zvinoda kuti tiite tsvakurudzo yakadzama pane inononoka-kunyungudika cellulose ether kugadzira process. Kurapa kwepamusoro (kwete iyo inonzi yekuwedzera yezvimwe zvinowedzera mune yakajairwa giredhi cellulose ether), kuitira kuti uchinje kune gypsum mortar system. Hydroxypropyl methylcellulose ether ine yakadzika pamusoro pekurapa inogona kuve yakagadzikana yekunyungudika nguva uye yakanaka ma mechanic properties mu gypsum mortar, uye inogona kuvandudza zvakanyanya kuenzana nekupedzisa maitiro edhaka.
Machine-sprayed gypsum mortar inowanzo shandisa yakaderera-viscosity hydroxypropyl methylcellulose ether pakati pe20,000 ne75,000, uye huwandu hwekuwedzera hunowanzo 0.2% kusvika 0.4%. Nguva yekumisikidza yemuchina-yakapfapfaidza gypsum mortar inodzorwa panenge awa imwe. Isu tinoshandisa gypsum dhaka goho kushushikana, epurasitiki viscosity, thixotropy, rheology uye kuenderana kwe slurry kutonga mashandiro egypsum dhaka zvigadzirwa.
Isu tinotarisa kunaka kwekutonga kwe desulfurization gypsum source calcining process, fillers (simende, fine aggregate, heavy calcium powder) uye admixtures (inogona kushandiswa mukuparadzira latex powder, hydroxypropyl methyl cellulose ether, yakawedzerwa perlite, gypsum retarder) Sarudzo yehuwandu hwechigadzirwa formula inodhura-inoshanda.
Hydroxypropyl methyl cellulose ethernokuti gypsum dhaka ine kuchena kwepamusoro uye kushanda zvakanaka, uye yakarumbidzwa zvikuru nevatengi vegypsum mortar.
Nguva yekutumira: Kubvumbi-25-2024