1 Isingeniso
I-adhesive-based tile adhesive okwamanje iwukusetshenziswa okukhulu kakhulu kodaka olukhethekile oluxutshwe okomile, olwakhiwe usimende njengento eyinhloko kasimende futhi yengezwe ngamaqoqo ahlanganisiwe, ama-agent okugcina amanzi, ama-ejenti wamandla okuqala, i-latex powder nezinye izithasiselo eziphilayo noma ezingaphili. ingxube.Ngokuvamile, idinga kuphela ukuxutshwa namanzi lapho isetshenziswa.Uma kuqhathaniswa nodaka olujwayelekile lukasimende, lungathuthukisa kakhulu amandla okubopha phakathi kwezinto ezibhekene ne-substrate, futhi linokumelana okuhle kokushelela kanye nokumelana okuhle kakhulu kwamanzi namanzi.Ngokuyinhloko isetshenziselwa ukunamathisela izinto zokuhlobisa ezifana nokwakha amathayela odonga lwangaphakathi nangaphandle, amathayili aphansi, njll. Isetshenziswa kakhulu ezindongeni zangaphakathi nangaphandle, phansi, izindlu zangasese, amakhishi nezinye izindawo zokuhlobisa izakhiwo.Okwamanje iyona esetshenziswa kabanzi kakhulu i-Tile bonding material.
Ngokuvamile lapho sahlulela ukusebenza kwe-adhesive ye-tile, asigcini nje ukunaka ukusebenza kwayo nokusebenza nekhono lokulwa nokuslayida, kodwa futhi sinake amandla ayo emishini kanye nesikhathi sokuvula.I-cellulose ether ku-adhesive tile ayithinti nje kuphela izakhiwo ze-rheological ze-adhesive porcelain, njengokusebenza okushelelayo, ummese wokunamathela, njll., kodwa futhi inethonya elinamandla ezintweni zemishini zokunamathisela i-tile.
2. Umthelela ngesikhathi sokuvula se-adhesive tile
Lapho impushana yenjoloba ne-cellulose ether kuhlangene odakeni olumanzi, amanye amamodeli edatha abonisa ukuthi impushana yenjoloba inamandla e-kinetic anamandla okunamathisela emikhiqizweni ye-cement hydration, futhi i-cellulose ether ikhona kakhulu ku-interstitial fluid, ethinta i-Mortar viscosity eyengeziwe nesikhathi sokumisa.Ukungezwani okungaphezulu kwe-cellulose ether kungaphezulu kwalokho kwempushana yerabha, futhi ukunothiswa kwe-cellulose ether okwengeziwe kusixhumi esibonakalayo sosimende kuzoba yinzuzo ekwakhekeni kwamabhondi e-hydrogen phakathi kwendawo eyisisekelo ne-cellulose ether.
Odakeni olumanzi, amanzi odaka ayahwamuka, futhi i-cellulose ether iyacetshiswa phezulu, futhi ifilimu izokwakhiwa ebusweni bodaka kungakapheli imizuzu emi-5, okuzonciphisa izinga lokuhwamuka okulandelayo, njengoba amanzi engeziwe ekhishwa. isuswe odakeni olujiyile Ingxenye yayo ithuthela ongqimbeni oluncane lodaka, futhi ifilimu eyakhiwe ekuqaleni iyancibilika kancane, futhi ukufuduka kwamanzi kuzoletha ukunothisa kwe-cellulose ether ngaphezulu kodaka.
Ngakho-ke, ukwakheka kwefilimu ye-cellulose ether ebusweni bodaka kunethonya elikhulu ekusebenzeni kodaka.I-1) Ifilimu eyenziwe incane kakhulu futhi izohlakazwa kabili, engakwazi ukukhawulela ukuhwamuka kwamanzi nokunciphisa amandla.2) Ifilimu eyenziwe iminyene kakhulu, ukuhlushwa kwe-cellulose ether oketshezini lwe-mortar interstitial kuphezulu, futhi i-viscosity iphezulu, ngakho-ke akulula ukuphula ifilimu engaphezulu lapho amathayili enamathiselwe.Kungabonakala ukuthi izakhiwo zefilimu ze-cellulose ether zinomthelela omkhulu ngesikhathi esivulekile.Uhlobo lwe-cellulose ether (i-HPMC, i-HEMC, i-MC, njll.) kanye nezinga le-etherification (i-substitution degree) kuthinta ngokuqondile izakhiwo zefilimu ze-cellulose ether, kanye nobulukhuni nokuqina kwefilimu.
3. Ithonya emandleni omdwebo
Ngaphezu kokudlulisela izici ezinenzuzo ezishiwo ngenhla odakeni, i-cellulose ether iphinde ibambezele i-hydration kinetics kasimende.Lo mphumela wokuvinjelwa ubangelwa ikakhulukazi ukukhangiswa kwama-molecule e-cellulose ether ezigabeni ezihlukahlukene zamaminerali ohlelweni lukasimende olunikezwa amanzi, kodwa ngokuvamile, ukuvumelana ukuthi ama-molecule e-cellulose ether adsorbed kakhulu emanzini afana ne-CSH ne-calcium hydroxide.Emikhiqizweni yamakhemikhali, ayivamile ukukhangiswa esigabeni sokuqala samaminerali se-clinker.Ngaphezu kwalokho, i-cellulose ether inciphisa ukuhamba kwama-ion (Ca2+, SO42-, ...) kusixazululo se-pore ngenxa yokwanda kwe-viscosity yesisombululo se-pore, ngaleyo ndlela kubambezeleka ngokwengeziwe inqubo ye-hydration.
I-Viscosity ingenye ipharamitha ebalulekile, emele izici zamakhemikhali ze-cellulose ether.Njengoba kushiwo ngenhla, i-viscosity ithinta kakhulu amandla okugcina amanzi futhi iphinde ibe nomthelela omkhulu ekusebenzeni kodaka olusha.Kodwa-ke, izifundo zokuhlola zithole ukuthi i-viscosity ye-cellulose ether cishe ayinawo umthelela kuma-kinetics we-cement hydration.Isisindo se-molecular sinomthelela omncane ku-hydration, futhi umehluko omkhulu phakathi kwezisindo zamangqamuzana ahlukene yi-10min kuphela.Ngakho-ke, isisindo samangqamuzana asiyona ipharamitha eyinhloko yokulawula ukugeleza kukasimende.
"Ukusetshenziswa kwe-Cellulose Ether ku-Cement-Based Dry-Mixed Mortar Products" kwabonisa ngokucacile ukuthi ukuvinjelwa kwe-cellulose ether kuncike ekwakhekeni kwamakhemikhali.Futhi ukuthambekela okuvamile okuphethwe ukuthi ku-MHEC, izinga eliphezulu le-methylation, liba mncane umphumela wokuvinjelwa kwe-cellulose ether.Ukwengeza, umphumela wokuhlehlisa we-hydrophilic substitution (njengokufaka esikhundleni se-HEC) unamandla kunalowo we-hydrophobic substitution (njengokufaka esikhundleni se-MH, MHEC, MHPC).
Ekuhlolweni, sicabangela i-HPMC, okuyi-ether eyinhlanganisela.Ku-HPMC, idinga izinga elithile lokumuncwa ukuze iqinisekise ukunyibilika kwayo kwamanzi kanye nokudluliswa kokukhanya.Siyazi ukuthi okuqukethwe kwama-substitute kuphinde kunqume izinga lokushisa lejeli le-HPMC, okungukuthi, Inquma indawo yokusetshenziswa ye-HPMC, ngakho okuqukethwe kweqembu kwe-HPMC okuvame ukusebenza nakho kufakwe kufreyimu ngaphakathi kwebanga.Kulolu hlu, indlela yokuhlanganisa i-methoxy ne-hydroxypropoxy ukuze kuzuzwe umphumela omuhle kakhulu okuqukethwe kocwaningo lwethu.Ngaphakathi kwebanga elithile, ukwanda kokuqukethwe kwamaqembu e-methoxyl kuzoholela ekwehleni kwamandla okudonsa, kuyilapho ukwanda kokuqukethwe kwamaqembu e-hydroxypropoxyl kuzoholela ekwandeni kwamandla okudonsa.Kunomphumela ofanayo wamahora okuvula.
Ukushintsha kwesimo samandla emishini ngaphansi kwesimo sesikhathi esivulekile sihambisana nezinga lokushisa elivamile, elibuye lihambisane nokuqina kwefilimu ye-cellulose ether esikhulume ngayo kuSigaba 2. Okuqukethwe kwe-methoxyl (DS) kuphezulu kanye ne-hydroxypropoxyl. I-HPMC enokuqukethwe okuphansi (MS) inokuqina okuhle kwefilimu, kodwa izophazamisa ukumanzisa kodaka olumanzi endaweni engaphezulu.
Isikhathi sokuthumela: Jan-30-2023