pH yezvigadzirwa zvegypsum inowanzova acidic kana kuti neutral. Iye zvino kune mhando mbiri dzemhando yekuvaka.hydroxypropyl methylcellulosepamusika: cellulose inonyunguduka zvishoma nezvishoma uye instant cellulose (S). Instant cellulose haina kukodzera gypsum systems. Zvigadzirwa, kunyunguduka kwakashata zvikuru mumamiriro ezvinhu ane acidic kana neutral, uye hydroxypropyl methylcellulose inonyunguduka zvishoma nezvishoma inogona kunyungudutswa muzvigadzirwa zvegypsum, asi cellulose inonyunguduka zvishoma nezvishoma ine dambudziko guru, zviri nyore kuungana (kana gypsum yamutswa pamadziro kwenguva pfupi, madonhwe madiki egranular anowanzoonekwa pamusoro). Parizvino, muzvigadzirwa zvegypsum, kunyanya mu gypsum mortar yakapfapfaidzwa nemuchina, zvinodiwa kuti cellulose ether iparadzirwe zvizere uye inyungudutswe munguva pfupi kwazvo, izvo zvinoda kuti tiite tsvakiridzo yakadzama pakugadzira cellulose ether inonyunguduka zvishoma nezvishoma. Kurapa pamusoro (kwete kunonzi kuwedzerwa kwezvimwe zvinowedzera mu standard grade cellulose ether), kuitira kuti ienderane ne gypsum mortar system. Hydroxypropyl methylcellulose ether ine deep surface treatment inogona kuva nenguva yakagadzikana yekunyunguduka uye hunhu hwakanaka hwemakanika mu gypsum mortar, uye inogona kuvandudza zvakanyanya maitiro ekuyera nekupedzisa mortar.
Gypsum mortar yakapfapfaidzwa nemuchina inowanzoshandisa hydroxypropyl methylcellulose ether ine viscosity yakaderera pakati pe20,000 ne75,000, uye huwandu hwekuwedzera hunowanzova 0.2% kusvika 0.4%. Nguva yekugadzika kwegypsum mortar yakapfapfaidzwa nemuchina inodzorwa kweinenge awa imwe. Tinoshandisa gypsum mortar yield stress, plastic viscosity, thixotropy, rheology uye consistency of slurry kuti titonge mashandiro ezvigadzirwa zvegypsum mortar.
Tinofunga nezvehunhu hwekudzora maitiro ekugadzira calcium kubva mu gypsum, mafiller (simende, fine aggregate, heavy calcium powder) uye admixtures (inogona kushandiswa mu dispersed latex powder, hydroxypropyl methyl cellulose ether, expanded perlite, gypsum retarder) Sarudzo yefomura yechigadzirwa chose inodhura zvishoma.
Hydroxypropyl methyl cellulose ethergypsum mortar ine kuchena kwakanyanya uye inoshanda zvakanaka, uye yave ichirumbidzwa zvikuru nevatengi vegypsum mortar.
Nguva yekutumira: Kubvumbi-25-2024