Ungayikhetha njani i-hydroxypropyl methylcellulose kwi-plaster mortar?

Ixabiso le-pH ngokubanzi leemveliso zegypsum li-acid okanye lingathathi cala. Ngoku kukho iintlobo ezimbini zodidi lolwakhiwoi-hydroxypropyl methylcellulosekwimarike: i-cellulose enyibilikayo kancinci kunye ne-cellulose ekhawulezileyo (S). I-cellulose ekhawulezileyo ayifanelekanga kwiinkqubo ze-gypsum. Iimveliso, ukunyibilika kuphantsi kakhulu phantsi kweemeko ze-asidi okanye ezingathathi cala, kwaye i-hydroxypropyl methylcellulose enyibilikayo kancinci inokunyibilika kwiimveliso ze-gypsum, kodwa i-cellulose enyibilikayo kancinci ineengxaki ezinkulu, kulula ukuyihlanganisa (xa i-gypsum Emva kokuba i-mortar ishukunyiswe eludongeni ixesha elifutshane, amabala amancinci e-granular adla ngokubonakala kumphezulu). Okwangoku, kwiimveliso ze-gypsum, ngakumbi kwi-gypsum mortar etshizwe ngomatshini, kufuneka ukuba i-cellulose ether isasazeke ngokupheleleyo kwaye ichithwe ngexesha elifutshane kakhulu, nto leyo efuna ukuba senze uphando olunzulu malunga nenkqubo yokuvelisa i-cellulose ether enyibilikayo kancinci. Unyango lomphezulu (hayi oko kubizwa ngokuba kukongezwa kwezinye izongezo kwi-cellulose ether eqhelekileyo ye-grade), ukuze ivumelane nenkqubo ye-gypsum mortar. I-Hydroxypropyl methylcellulose ether enonyango oluphezulu lomphezulu inokuba nexesha lokunyibilika elizinzileyo kunye neempawu ezilungileyo zoomatshini kwi-gypsum mortar, kwaye inokuphucula kakhulu inkqubo yokulinganisa kunye nokugqiba i-mortar.

I-gypsum mortar etshizwa ngomatshini ngokubanzi isebenzisa i-hydroxypropyl methylcellulose ether ene-viscosity ephantsi phakathi kwama-20,000 nama-75,000, kwaye isixa esongeziweyo ngokubanzi yi-0.2% ukuya kwi-0.4%. Ixesha lokuseta i-gypsum mortar etshizwa ngomatshini lilawulwa malunga neyure e-1. Sisebenzisa i-gypsum mortar yield stress, i-plastic viscosity, i-thixotropy, i-rheology kunye nokuvumelana kwe-slurry ukugweba ukusebenza kweemveliso ze-gypsum mortar.

Siqwalasela ulawulo lomgangatho wenkqubo ye-desulfurization gypsum source calcining, izizalisi (isamente, i-fine aggregate, i-heavy calcium powder) kunye nezixube (zingasetyenziswa kwi-dispersed latex powder, i-hydroxypropyl methyl cellulose ether, i-expanded perlite, i-gypsum retarder) Ukukhetha ifomyula yemveliso iyonke kuyabiza kakhulu.

I-Hydroxypropyl methyl cellulose etherI-gypsum mortar icocekile kakhulu kwaye iyasebenza kakuhle, kwaye idunyiswe kakhulu ngabathengi be-gypsum mortar.