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 peasidhi kana kusarerekera mamiriro, uye inononoka-kunyunguduka hydroxypropyl methylcellulose inogona kunyungudika mune gypsum zvigadzirwa, asi inononoka-kunyungudika cellulose ine yakakosha dhizaini, zviri nyore kuita agglomerate (kana gypsum Mushure mekunge dhaka yamutswa. madziro kwenguva pfupi, madiki madiki madiki anowanzo kuoneka pamusoro). Parizvino, muzvigadzirwa zvegypsum, kunyanya mumakina-sprayed gypsum mortar, zvinodikanwa kuti cellulose ether inogona kuparadzirwa zvizere uye kunyungudika munguva pfupi, izvo zvinoda kuti isu tiite tsvakiridzo yakadzama pane inononoka-inonyungudika cellulose ether. kugadzirwa. 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 yezvose. chigadzirwa 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