Udaka oluzilinganisa lungathembela esisindweni salo ukuze lwakhe isisekelo esiyisicaba, esibushelelezi nesiqinile ku-substrate yokubeka noma yokuhlanganisa ezinye izinto. Ngesikhathi esifanayo, ingakwazi ukwenza ukwakhiwa okukhulu nokusebenza kahle. Ngakho-ke, i-fluidity ephezulu iyisici esibaluleke kakhulu se-self-leveling mortar Ngaphezu kwalokho, kufanele ibe nokugcinwa kwamanzi athile namandla okubopha, kungabikho mkhuba wokuhlukaniswa kwamanzi, futhi ibe nezici zokushisa ukushisa nokukhuphuka okuphansi kwezinga lokushisa.
Ngokuvamile, udaka oluzilinganisa ludinga uketshezi oluhle, kodwa uketshezi lwangempela lokunamathisela usimende ngokuvamile luyi-10-12cm kuphela; phakathii-cellulose ethers, i-hydroxypropyl methylcellulose (i-HPMC) iyisengezo esiyinhloko se-mortar exutshwe ngomumo, nakuba inani lokwengeza liphansi kakhulu, lingakwazi ukuthuthukisa ngokuphawulekayo ukusebenza kodaka, lingathuthukisa ukuhambisana, ukusebenza komsebenzi, ukusebenza kwesibopho kanye nokusebenza kokugcinwa kwamanzi kodaka. Idlala indima ebaluleke kakhulu emkhakheni wodaka osulungile.
1. Ukuhamba
I-Hydroxypropyl methylcellulose (HPMC)kunomthelela obalulekile ekugcinweni kwamanzi, ukungaguquguquki kanye nokusebenza kokwakhiwa kodaka lokuzilinganisa. Ikakhulukazi njengodaka oluzilinganisa, uketshezi lungenye yezinkomba eziyinhloko zokuhlola ukusebenza kokuzilinganisa. Ngaphansi kwesisekelo sokuqinisekisa ukubunjwa okujwayelekile kodaka, ukugcwala kodaka kungalungiswa ngokushintsha inani le-HPMC. Kodwa-ke, uma umthamo uphezulu kakhulu, ukugcwala kodaka kuzoncishiswa, ngakho-ke umthamo we-HPMC kufanele ulawulwe ngaphakathi kwebanga elifanele.
2. Ukugcinwa kwamanzi
Ukugcinwa kwamanzi kodaka kuyinkomba ebalulekile yokulinganisa ukuzinza kwezingxenye zangaphakathi zodaka lukasimende olusanda kuxutshwa. Ukuze wenze ngokugcwele ukusabela kwe-hydration yezinto zejeli, inani elifanele le-HPMC lingagcina umswakama odongeni isikhathi eside. Ngokuvamile, izinga lokugcinwa kwamanzi odaka liyakhuphuka ngokunyuka kokuqukethwe kwe-HPMC. Umsebenzi wokugcinwa kwamanzi we-HPMC ungavimbela i-substrate ekumunceni amanzi amaningi ngokushesha kakhulu, futhi ivimbele ukuhwamuka kwamanzi, ukuze kuqinisekiswe ukuthi imvelo enodaka ihlinzeka ngamanzi anele okufakwa kukasimende. Ngaphezu kwalokho, i-viscosity ye-hydroxypropyl methylcellulose nayo inomthelela omkhulu ekugcinweni kwamanzi odaka. Ukuphakama kwe-viscosity, kungcono ukugcina amanzi. Ngokuvamile, imikhiqizo ene-viscosity engaba ngu-400mpa.s isetshenziselwa kakhulu udaka lokuzilinganisa, olungathuthukisa ukusebenza kokulingana kodaka futhi kwandise ukubumbana kodaka.
3. Ukusetha isikhathi
I-HPMC inomphumela othize wokubuyisela emuva odakeni. Ngokukhuphuka komthamo, isikhathi sokumisa udaka siyandiswa. Umthelela wokuhlehlisa we-HPMC ekunamathisele usimende ikakhulukazi uncike ezingeni lokushintshwa kwamaqembu e-alkyl, futhi inobudlelwano obuncane nesisindo sayo samangqamuzana. Uma izinga lokushintshwa kwe-alkyl lincane, okuqukethwe kwe-hydroxyl kukhulu, kanye nomthelela obambezelekayo osobala kakhulu. Futhi ukuphakama kokuqukethwe kwe-HPMC, umphumela wongqimba lwefilimu oyinkimbinkimbi ekubambezelekeni kokuqala kukasimende, ngakho umphumela wokuhlehlisa nawo ubonakala kakhudlwana.
4. Amandla e-Flexural namandla acindezelayo
Ngokuvamile, amandla angenye yezinkomba ezibalulekile zokuhlola umphumela wokwelapha wezinto zikasimende ezisekelwe kusimende engxubeni. Amandla acindezelayo namandla aguqukayo odaka azokwehla ngokwanda kokuqukethwe kwe-HPMC.
5. Amandla ebhondi
I-HPMC inethonya elikhulu ekusebenzeni kokubopha kodaka.I-HPMCyakha ifilimu ye-polymer enomphumela wokuvala phakathi kwesistimu yesigaba se-liquid kanye nezinhlayiya ze-cement hydration, ezikhuthaza amanzi amaningi efilimu ye-polymer ngaphandle kwezinhlayiya ze-cement, ezihambisana nokugcwala okuphelele kwe-cement, ngaleyo ndlela kuthuthukise ikhwalithi ye-slurry. Amandla esibopho esiqinile. Ngesikhathi esifanayo, ukwengeza inani elifanele le-HPMC kuthuthukisa ipulasitiki nokuguquguquka kodaka, kunciphisa ukuqina kwendawo yoguquko phakathi kodaka kanye nesixhumi esibonakalayo se-substrate, futhi kunciphisa ikhono lokushelela phakathi kwezixhumanisi. Ngokwezinga elithile, umphumela wokubopha phakathi kodaka ne-substrate uyathuthukiswa. Ukwengeza, ngenxa yokuba khona kwe-HPMC kusimende unamathiselwe, kwakhiwa indawo ekhethekile yokuguqula isikhombimsebenzisi kanye nongqimba lwesixhumi esibonakalayo phakathi kwezinhlayiya zodaka kanye nomkhiqizo we-hydration. Lesi sendlalelo esibonakalayo senza indawo yokuguqula isixhumi esibonakalayo ibe lula futhi iqine kancane. Ngakho-ke, i-Mortar inamandla okubopha aqinile.
Isikhathi sokuthumela: Apr-25-2024