Ungayikhetha njani i-hydroxypropyl methylcellulose yodaka lodaka?

Ixabiso le-pH eliqhelekileyo leemveliso ze-gypsum li-acidic okanye lingathathi hlangothi. Ngoku kukho iindidi ezimbini zebakala lokwakhaihydroxypropyl methylcellulosekwimarike: i-cellulose echithwa kancinci kunye ne-cellulose ekhawulezileyo (S). I-cellulose esheshayo ayifanelekanga kwiinkqubo ze-gypsum. Iimveliso, i-solubility ihlupheke kakhulu phantsi kweemeko ze-acidic okanye ezingathathi hlangothi, kwaye i-hydroxypropyl methylcellulose ecothayo inokunyibilika kwiimveliso ze-gypsum, kodwa i-cellulose yokuchithwa kancinci inobungozi obukhulu, kulula ukuyidibanisa (xa i-gypsum Emva kokuba i-mortar ishukunyiswa. udonga ixesha elifutshane, amabala amancinci amancinci avame ukubonakala phezu komhlaba). Okwangoku, kwiimveliso ze-gypsum, ngakumbi kumatshini we-gypsum mortar, kufuneka ukuba i-cellulose ether ingachithwa ngokupheleleyo kwaye inyibilike ngexesha elifutshane kakhulu, efuna ukuba senze uphando olunzulu malunga ne-ether ye-cellulose ecothayo. inkqubo yemveliso. Unyango lwangaphezulu (kungekhona oko kuthiwa ukongeza kwezinye izongezo kwibakala eliqhelekileyo le-cellulose ether), ukuze ulungelelanise nenkqubo yodaka lwegypsum. I-Hydroxypropyl methylcellulose ether enonyango olunzulu lomphezulu ingaba nexesha elizinzile lokuchithwa kunye neempawu ezilungileyo zemishini kwi-gypsum mortar, kwaye inokuphucula kakhulu inkqubo yokulinganisa kunye nokugqiba udaka.

Udaka lwegypsum olutshizwe ngomatshini lusebenzisa i-hydroxypropyl methylcellulose ether ephakathi kwe-20,000 kunye ne-75,000, kwaye isixa-mali esongezelelweyo siqhele ukuba yi-0.2% ukuya kwi-0.4%. Ixesha lokumisela umatshini we-gypsum mortar ulawulwa malunga neyure eli-1. Sisebenzisa i-gypsum mortar yield stress, i-viscosity yeplastiki, i-thixotropy, i-rheology kunye nokuhambelana kwe-slurry ukugweba ukusebenza kweemveliso ze-gypsum mortar.

Siqwalasela ulawulo lomgangatho we-desulfurization gypsum source calcining process, fillers (samente, aggregate fine, heavy calcium powder) kunye ne-admixtures (inokusetyenziswa kwi-disperse latex powder, i-hydroxypropyl methyl cellulose ether, i-perlite eyandisiweyo, i-gypsum retarder) ifomula yemveliso ingabizi.

IHydroxypropyl methyl cellulose etherkuba udaka lwegypsum lucocekile oluphezulu kunye nokusebenza kakuhle, kwaye luye lwanconywa ngokubanzi ngabathengi bodaka lwegypsum.