Iselulosi ether ukuya kudaka lwegypsum

Zombini i-carboxymethyl cellulose kunye ne-methyl cellulose zinokusetyenziswa njengeejenti zokugcina amanzi kwi-plaster, kodwa umphumo wokugcina amanzi we-carboxymethyl cellulose ungaphantsi kakhulu kune-methyl cellulose, kwaye i-carboxymethyl cellulose inetyuwa yesodium, ngoko ayifanelekanga kwi-plaster eParis. Inesiphumo esibambezelekayo kwaye inciphisa amandla e-plaster of paris. I-Methyl cellulose ngumxube ofanelekileyo we-gypsum cementitious materials edibanisa ukugcinwa kwamanzi, ukutyeba, ukomeleza, kunye ne-viscosifying, ngaphandle kokuba ezinye iindidi zinefuthe lokubuyiswa xa idosi inkulu. iphezulu kune-carboxymethyl cellulose. Ngesi sizathu, uninzi lwezixhobo ze-gypsum composite gelling zisebenzisa indlela yokudibanisa i-carboxymethyl cellulose kunye ne-methyl cellulose, ezingasebenzisi nje kuphela iimpawu zazo (ezifana nefuthe lokubuyiswa kwe-carboxymethyl cellulose, ukomeleza i-methyl cellulose), kwaye zisebenzisa izibonelelo zazo eziqhelekileyo. (ezifana nokugcinwa kwamanzi kunye nesiphumo sokuqina). Ngale ndlela, zombini ukugcinwa kwamanzi kwi-gypsum cementitious material kunye nokusebenza ngokubanzi kwe-gypsum cementitious material kunokuphuculwa, ngelixa ukunyuka kweendleko kugcinwa kwindawo ephantsi.

Ibaluleke kangakanani i-viscosity ye-methyl cellulose ether kwi-gypsum mortar?

I-Viscosity yiparameter ebalulekileyo yei-methyl cellulose etherukusebenza.

Ngokuqhelekileyo, okukhona i-viscosity iphezulu, kokukhona isiphumo sokugcina amanzi kwi-gypsum mortar. Nangona kunjalo, ukuphakama kwe-viscosity, ukuphakama kwe-molecular weight ye-methyl cellulose ether, kunye nokuncipha okuhambelanayo kwi-solubility yayo kuya kuba nefuthe elibi kumandla kunye nokusebenza kokwakhiwa kodaka. Ukuphakama kwe-viscosity, kubonakala ngakumbi impembelelo yokuqina kumdaka, kodwa ayilingani ngokuthe ngqo. Ukuphakama kwe-viscosity, i-viscous ngakumbi udaka olumanzi luya kuba. Ngexesha lokwakhiwa, kubonakaliswa njengokunamathela kwi-scraper kunye nokunamathela okuphezulu kwi-substrate. Kodwa akuncedi ukunyusa amandla esakhiwo sodaka olumanzi ngokwalo. Ukongezelela, ngexesha lokwakhiwa, ukusebenza kwe-anti-sag yodaka olumanzi alubonakali. Ngokuchasene noko, i-viscosity ethile ephakathi kunye nephantsi kodwa i-methyl cellulose ethers elungisiweyo inomsebenzi ogqwesileyo ekuphuculeni amandla okwakhiwa kodaka olumanzi.

Kubaluleke kangakanani ukucolwa kwe-cellulose ether kudaka?

Ukulunga kukwayisalathisi sokusebenza esibalulekileyo se-methyl cellulose ether. I-MC esetyenziselwa udaka lwepowder eyomileyo iyadingeka ukuba ibe ngumgubo kunye nomxholo wamanzi aphantsi, kwaye i-fineness nayo ifuna i-20% ukuya kwi-60% ye-particle size ibe ngaphantsi kwe-63m. Ukucoleka kuchaphazela ukunyibilika kwe-methyl cellulose ether. I-coarse MC idla ngokuba yigranular, ekulula ukuyichitha kunye nokunyibilika emanzini ngaphandle kwe-agglomeration, kodwa isantya sokuchithwa sicotha kakhulu, ngoko asifanelekanga ukusetyenziswa kwi-powder mortar. Ezinye iimveliso zasekhaya zi-flocculent, akulula ukuba zisasazwe kwaye zinyibilike emanzini, kwaye kulula ukuzidibanisa. Kwidaka elomileyo lomgubo, i-MC ihlakazwe phakathi kwee-aggregates, iifilisi ezintle kunye nesamente kunye nezinye izinto zesamente. Umgubo ocolekileyo kuphela onokuphepha i-methyl cellulose ether agglomeration xa ixutywa namanzi. Xa i-MC yongezwa ngamanzi ukunyibilikisa i-agglomerates, kunzima kakhulu ukuchithwa kunye nokuchithwa. I-coarse MC ayinayo nje inkcitho, kodwa inciphisa amandla asekuhlaleni odaka. Xa udaka olomileyo lwepowder lusetyenziswa kwindawo enkulu, isantya sokunyanga sodaka lwendawo siya kuncitshiswa kakhulu, kwaye ukuqhekeka kuya kubonakala ngenxa yamaxesha ahlukeneyo okuphilisa. Ngodaka olutshiziweyo kunye nokwakhiwa komatshini, imfuno yokucolisa iphezulu ngenxa yexesha elifutshane lokuxuba.

Ukucoleka kwe-MC kukwanefuthe elithile ekugcineni amanzi. Ngokubanzi, kwi-methyl cellulose ethers ezineviscosity efanayo kodwa ukucoleka okwahlukileyo, phantsi komyinge wokongeza ofanayo, kokukhona ucoleka kokukhona kungcono ugcino lwamanzi.