I-HPMC (i-Hydroxypropyl Methyl Cellulose) iyinto esetshenziswayo ye-polymer evame ukusetshenziswa ezintweni zokwakha, ikakhulukazi ezintweni zokwakha usimende kanye nezinto zokwakha ze-gypsum. Ine-solubility yamanzi enhle, ukunamathela, ukugcinwa kwamanzi kanye nokuqina kwamanzi, ngakho-ke kusetshenziswa kabanzi ku-usimende, i-putty adhesive nezinye izinto.
1. Izimbangela zeShrikage kanye nokuqhekeka kwezinto zokwakha
Ngesikhathi senqubo enzima, izinto zokwakha zivame ukuncipha ngevolumu ngenxa yokuhwamuka kwamanzi, ukusabela kwamakhemikhali kanye nezinguquko ezintweni zangaphandle zemvelo, okuholela ekuhlushweni kwengcindezi nokuqhekeka. Izinhlobo eziphambili zeShrinkage zifaka:
I-Shrimpage yepulasitiki: Lapho impahla esekwe kusika usingabi nzima, ivolumu liyancipha ngenxa yokuhwamuka ngokushesha kwamanzi.
I-Shrinkage eyomile: Ngemuva kokuqina kwezinto ezibonakalayo, kuvezwa emoyeni isikhathi eside, futhi amanzi avele kancane kancane, okuholela ekunciphiseni ivolumu.
Ukushisa kwe-shrinkage: Ukushintshwa kwevolumu okubangelwa izinguquko zokushisa, ikakhulukazi endaweni enomehluko omkhulu wokushisa phakathi kwemini nobusuku.
I-Autogenous Shrinkage: Ngesikhathi senqubo ye-Cement Hydration, ivolumu yangaphakathi iyancipha ngenxa yokusetshenziswa kwamanzi ngokuphendula kwe-hydration.
Lezi zinqwaba zivame ukuholela ekuqothulweni kwengcindezi ngaphakathi kwalokhu okuqukethwe, ekugcineni kudala ama-microcracks noma imifantu, okuthinta ukuqina kanye nama-aesthetics wesakhiwo sokwakha. Ukuze ugweme le nto, izengezo zivame ukudingeka ukuthuthukisa ukusebenza kwezinto ezibonakalayo, futhi i-HPMC ingenye yazo.
2. Indlela yokusebenza ye-HPMC
I-HPMC idlala indima ebalulekile ekwehliseni i-shrinkage kanye nokuqhekeka kwezinto zokwakha, ezitholakala ikakhulu ezinhlanganweni ezilandelayo:
Ukugcinwa kwamanzi: I-HPMC inomthamo oqinile wokugcina amanzi futhi ingakha ifilimu yokugcina amanzi ku-wortar noma uPutty Powder ukunciphisa izinga lokuhwamuka kwamanzi. Njengoba ukuhwamuka ngokushesha kwamanzi ngaphakathi kokuqukethwe kuzodala ukushwabana kwepulasitiki, umphumela wokugcina amanzi we-HPMC anganciphisa ngempumelelo i-shnomenon yokuqala, ngaleyo ndlela akhuthaza ukusabela okugcwele kwe-hydrate yensimbi nokunciphisa ukuqhekeka okubangelwa yi-shrinkage. ukulahleka kwamanzi ngesikhathi senqubo yokomisa. Ngaphezu kwalokho, i-HPMC ingathuthukisa ukusebenza kwezinto ezingaphansi kwezimo ezimanzi nezomile futhi inciphise ukuqhekeka okubangelwa ukulahleka kwamanzi.
Umphumela wokuqina nokuqinisa: I-HPMC iyi-sikhulu engakhulisa ngokufanele ukuguquguquka nokubonakaliswa kodaka futhi athuthukise ukunamathela okuphelele kwezinto ezibonakalayo. Ngesikhathi senqubo yokwakha, uma impahla incane kakhulu, kulula ukuhlalisa noma i-sag, okuholela endaweni engalingani noma imifantu. Ngokusebenzisa i-HPMC, udaka angagcina ukubonwa okufanelekile, athuthukise amandla nobuningi bendawo yalokho okwakhiwa ngemuva kokwakha, futhi kunciphise amathuba okuqhekeka. Ngaphezu kwalokho, i-HPMC ingaphinde futhi ithuthukise ukumelana nokuncipha kwezinto ezibonakalayo futhi ithuthukise ukumelana kwayo kokuqhekeka.
Thuthukisa ukuguquguquka kwezinto ezibonakalayo: ama-molecule e-HPMC angadlala indima ethile ekuthuthukiseni ukuguquguquka kwezinto zokwenziwa kokhonkolo noma izinto zokwenziwa ze-gypsum, ukuze impahla ihambisane kahle futhi iboshwe ngemuva kokuphulukisa. Kusukela izinto zokwakha zivame ukucindezelwa okuthe xaxa noma zokugoba ngaphansi kwezinguquko zokushisa ezikhona noma imithwalo, ngemuva kokungeza i-HPMC, ukuguquguquka kokunyuka okukhulayo, okungathola ukuncipha kwangaphandle, okugwema ukuqhekeka kwe-brittle.
Lawula isilinganiso se-Cement Hydration Reaction Rate: Ezintweni ezenzelwe usimende, ijubane lesilinganiso sokuphendula nge-hydration ngqo lithinta ngqo ukusebenza kwezinto. Uma ukusabela kwe-hydration kushesha kakhulu, ingcindezi ngaphakathi kokuqukethwe ayinakukhishwa ngesikhathi, okuholela ekuqhekekeni. I-HPMC inganciphisa ijubane isilinganiso sokuphendula kwe-hydration ngokugcinwa kwayo kwamanzi kanye nokwakheka kwamafilimu okuvikelayo, ukuvikela usimende kusuka ekulahlekelweni kwamanzi ngokushesha, futhi ngenxa yalokho gwema into ye-shrinkate yokuzivikela kanye nokuqhekeka ngesikhathi senqubo eqinile yezinto ezibonakalayo.
Thuthukisa ukusebenza kokwakha Kungenza udaka, u-putty powder, njll. Kulula ukusakaza kanye neleveli ngesikhathi sokwakha, ukunciphisa isilinganiso se-Void of Materies, uthuthukise ubungako bokwenziwa, futhi wehlise ubungozi bokuqhekeka kwasendaweni okubangelwa ukwakhiwa kwasendaweni okubangelwa ukwakhiwa kwasendaweni okubangelwa ukwakhiwa kwasendaweni okubangelwa ukwakhiwa okungalingani.
3. Ukusetshenziswa kwe-HPMC ngezinto ezithile zokwakha
I-Tile Adhesive: I-HPMC ingathuthukisa kakhulu ukusebenza kwe-anti-slip ye-tile anamathela, iqinisekise ukuthi amathayili anganamathiselwa ngokulinganayo ku-substrate ngesikhathi sokufakwa, futhi anciphise ukuchitha noma ukuqhekeka okubangelwa yingcindezi engalingani noma ukuqhekeka. Ngaphezu kwalokho, imiphumela yokukhula nokugcinwa kwamanzi ye-HPMC inika amandla ukuthambekela kwe-tile ukuze kugcinwe isikhathi esivulekile esivulekile ngemuva kokwakha, ukuthuthukisa ukusebenza kokwakha, futhi kunciphise ukuqhekeka okubangelwa ukwelashwa okungalingani.
I-PuTTY Powder: Ku-Putty Powder, Impahla Yokugcina Amanzi ye-HPMC ingavimba ama-putty ekulahlekelweni kwamanzi ngokushesha ngesikhathi senqubo yokomisa, futhi anciphise ukuncipha kanye nokuqhekeka okubangelwa ukulahleka kwamanzi. Ngasikhathi sinye, umphumela wokuqina we-HPMC angathuthukisa ukusebenza kokwakha kwe-putty, okwenza kube lula ukufaka isicelo ngokulinganayo odongeni, futhi kunciphisa ukuqhekeka okungaphezulu kwe-Uneethen.
Udaka: Ukungeza i-HPMC kuya ku-motar kungathuthukisa ukusebenza kahle kokusebenza kwayo, yenza udaka olubushelelezi ngesikhathi sokwakha, ukunciphisa ukuhlukaniswa kanye nokuhlobisa, futhi ngaleyo ndlela kuthuthukiswe ukufana nokunamathela kodaka. Ngasikhathi sinye, umphumela wokugcina amanzi we-HPMC angenza ukuthi amanzi avele kancane ngesikhathi senqubo enzima yodaka, ukugwema ukuncipha kanye nokuqhekeka okubangelwa ukulahleka kwamanzi kusenesikhathi.
4. Ukuqapha kokusetshenziswa kwe-HPMC
Ukulawulwa kwemithamo: Inani le-HPMC elingeziwe linomthelela oqondile emthethweni walo, futhi kuvame ukulungiswa ngokwesilinganiso sezinto ezibonakalayo kanye nezimo ezithile zesicelo. I-HPMC eyeqile izokubangela lokho okuqukethwe kube nokuvumelana kakhulu, okuthinta ukusebenza kokwakha; Ngenkathi i-HPMC enganele ngeke ikwazi ukudlala iqhaza lokugcinwa kwamanzi futhi likhule njengoba kufanele.
Sebenzisa nezinye izengezo: I-HPMC imvamisa isetshenziswa ngokuhlanganiswa nezinye izengezo zamakhemikhali (ezifana nokunciphiswa kwamanzi, ama-air afaka umoya, ama-ejenti okufaka umoya, ama-spitizers, njll.) Ukuthola imiphumela engcono. Lapho usebenzisa, kuyadingeka ukubheka ukuhlangana kwezithasiselo ezahlukahlukene ukugwema ukuthonya okubonakalayo ekusebenzeni kwezinto zokwakha.
Njengesengezo sokwakha esibalulekile, i-HPMC inomphumela obalulekile ekunciphiseni i-shrinkage kanye nokuqhekeka kwezinto zokwakha. Kunciphisa ngempumelelo ukuqhekeka okubangelwa ukulahleka kwamanzi kanye nokugxila kwengcindezi ngokwenza ngcono ukugcinwa kwamanzi, ukuqina, ukuguquguquka kwezinto ezibonakalayo kanye nokwenza ngcono isilinganiso se-hyment hydration reaction ration. Ukusetshenziswa okunengqondo kwe-HPMC akunakuthuthukisa ukusebenza kwezokwakha kuphela, kepha futhi kwandisa impilo yenkonzo yesakhiwo sokwakha futhi kunciphise izindleko zokulungiswa kwamuva. Ngokuthuthuka okuqhubekayo kokwakheka kobuchwepheshe bezinto ezibonakalayo, ukusetshenziswa kwe-HPMC enkombeni yokwakha kuzokhulisa kakhulu nokujula.
Isikhathi sePosi: Sep-21-2024