Ekubunjweni kwe-powder mortar eyomile, i-methyl cellulose iyinani eliphansi lokuhlanganisa, kodwa linesengezo esibalulekile esingathuthukisa kakhulu ukuxuba nokusebenza kokwakhiwa kodaka. Ukukubeka kalula, cishe zonke izakhiwo ezimanzi zokuxuba zodaka ezingabonakala ngeso lenyama zinikezwa i-cellulose ether. Iphuma ku-cellulose etholwe kusetshenziswa i-cellulose evela kukhuni nokotini, isabela nge-caustic soda, futhi iyifake etherifying nge-ejenti e-etherifying.
Izinhlobo ze-Methyl Cellulose Ether
A. IHydroxypropyl methylcellulose (HPMC) yenziwe ikakhulukazi ukotini ocwenge kakhulu ocwengekile njengempahla eluhlaza, efakwa etherified ngokukhethekile ngaphansi kwezimo ze-alkali.
B. IHydroxyethyl methyl cellulose (HEMC), i-non-ionic cellulose ether, iyimpushana emhlophe, ayinaphunga futhi ayinambitheki.
C. IHydroxyethylcellulose (HEC) iyi-surfactant engeyona i-ionic, imhlophe ngokubukeka, ayinaphunga futhi ayinambitheki futhi impushana egeleza kalula.
Okungenhla ama-non-ionic cellulose ethers, nama-ionic cellulose ethers (afana ne-carboxymethyl cellulose (CMC)).
Ngesikhathi sokusetshenziswa kwe-powder mortar eyomile, ngenxa yokuthi i-ionic cellulose (CMC) ayizinzile lapho kukhona ama-calcium ions, ayivamile ukusetshenziswa ezinhlelweni ze-inorganic gelling ezinosimende kanye ne-slaked lime njengezinto zokuhlanganisa. Kwezinye izindawo e-China, Amanye ama-putty angaphakathi odongeni acutshungulwa ngesitashi esishintshiwe njengesisetshenziswa esiyinhloko sikasimende kanye ne-Shuangfei powder njengesithako sokugcwalisa sisebenzisa i-CMC njengokuqina, kodwa ngenxa yokuthi lo mkhiqizo uthambekele ekubeni nesikhutha futhi awukwazi ukumelana namanzi, uyasuswa kancane kancane. ngasemakethe . Njengamanje, i-cellulose ether esetshenziswa kakhulu e-China yi-HPMC.
I-Cellulose ether isetshenziswa kakhulu njenge-ejenti yokugcina amanzi kanye ne-thickener ezintweni ezisekelwe kusimende.
Umsebenzi wayo wokugcina amanzi ungavimbela i-substrate ekumunceni amanzi amaningi ngokushesha futhi ivimbele ukuhwamuka kwamanzi, ukuze kuqinisekiswe ukuthi usimende unamanzi anele uma ufakwe amanzi. Thatha umsebenzi wokuplasta njengesibonelo. Lapho i-slurry ye-cement evamile isetshenziswa ebusweni be-substrate, i-substrate eyomile ne-porous izothatha ngokushesha inani elikhulu lamanzi kusuka ku-slurry, futhi ungqimba lwe-cement slurry oluseduze ne-substrate luzolahlekelwa kalula ukugeleza kwalo. Ngakho-ke, akukwazi nje kuphela ukwakha ijeli ye-samente enamandla okunamathela ebusweni be-substrate, kodwa futhi kubangele kalula i-warping kanye nokuphuma kwamanzi, ukuze ungqimba lukasimende olungaphezulu lwe-slurry lube lula ukuwa. Uma i-grout esetshenzisiwe incane, kulula futhi ukwakha imifantu kuyo yonke i-grout. Ngakho-ke, esikhathini esidlule sokuphahlelwa kwendawo, izinto eziyisisekelo zazivame ukumanziswa ngamanzi kuqala, kodwa lokhu kusebenza kwakuwumsebenzi omkhulu futhi kudla isikhathi, futhi ikhwalithi yokusebenza kwakunzima ukuyilawula.
Ngokuvamile, ukugcinwa kwamanzi kodaka lukasimende kukhuphuka ngokwanda kokuqukethwe kwe-cellulose ether. Uma kukhulu i-viscosity ye-cellulose ether eyengeziwe, ukugcinwa kwamanzi kungcono.
Ngaphezu kokugcina amanzi kanye nokuqina, i-cellulose ether iphinda ithinte ezinye izakhiwo zikasimende, njengokuhlehlisa, ukufaka umoya, nokwandisa amandla ebhondi. I-Cellulose ether inciphisa ukumiswa kanye nenqubo yokuqina kukasimende, ngaleyo ndlela ikhulise isikhathi sokusebenza, ngakho ngezinye izikhathi isetshenziswa njengesilawuli esimisiwe.
Ngokuthuthukiswa kodaka oluxutshwe okomile, i-cellulose ether isibe ingxube ebalulekile yodaka lukasimende. Kodwa-ke, kunezinhlobo eziningi kanye nokucaciswa kwe-cellulose ether, futhi ikhwalithi phakathi kwamaqoqo isalokhu iguquguquka.
1. Izici zokusebenza zodaka oluguquliwe zihlobene eduze nokuthuthukiswa kwe-viscosity ye-cellulose ether. Nakuba imikhiqizo ene-viscosity ephezulu ene-viscosity yokugcina ephezulu, ngenxa yokuqedwa kancane, kuthatha isikhathi eside ukuthola i-viscosity yokugcina; ngaphezu kwalokho, I-cellulose ether enezinhlayiya eziqinile ithatha isikhathi eside ukuze ithole i-viscosity yokugcina, ngakho umkhiqizo one-viscosity ephakeme awunazo izici zokusebenza ezingcono.
2. Ngenxa yomkhawulo wezinga le-polymerization yezinto zokusetshenziswa kwe-cellulose ether, i-viscosity ephezulu ye-cellulose ether nayo inomkhawulo.
3. Kuyadingeka ukuhlola ukuthengwa, inqubo yokukhiqiza kanye nokuhlolwa kwefekthri ukuze kugwenywe ukuguquguquka kwekhwalithi.
Isikhathi sokuthumela: Feb-17-2023