IHydroxypropyl methylcellulose iyinhlanganisela ye-polymer encibilika emanzini, eyaziwa nangokuthi i-resin encibilika emanzini noma i-polymer encibilika emanzini. Iqinisa ingxube ngokwandisa i-viscosity yamanzi okuxuba. Kuyinto hydrophilic polymer material. Ingancibilika emanzini ukwenza isixazululo noma ukuhlakazeka. Ukuhlola kubonisa ukuthi lapho inani le-superplasticizer esekwe ku-naphthalene likhuphuka, ukufakwa kwe-superplasticizer kuzonciphisa ukumelana nokuhlakazeka kodaka lukasimende olusanda kuxutshwa. Lokhu kungenxa yokuthi i-naphthalene superplasticizer iyi-surfactant. Lapho i-ejenti yokunciphisa amanzi yengezwa odakeni, i-ejenti yokunciphisa amanzi ihlelwe ebusweni bezinhlayiya ze-samente, ukuze ubuso bezinhlayiya ze-cement bube necala elifanayo. Lokhu kukhishwa kukagesi kuhlakaza isakhiwo se-flocculation esakhiwe yizinhlayiya zikasimende, futhi amanzi ahlanganiswe esakhiweni ayakhululwa, okuholela ekulahlekeni kwengxenye yesimende. Ngesikhathi esifanayo, kwatholakala ukuthi ngokwanda kokuqukethwe kwe-HPMC, ukumelana nokuhlakazeka kodaka olusha lukasimende kwaba ngcono futhi kwaba ngcono.
Izici zamandla zekhonkrithi:
Ingxube kakhonkolo engaphansi kwamanzi engahlakazeka ye-HPMC isetshenziswa kubunjiniyela besisekelo sebhuloho lomgwaqo onguthelawayeka, futhi izinga lamandla omklamo ngu-C25. Ngokusho kokuhlolwa okuyisisekelo, inani likasimende lingama-400kg, inani le-microsilica liyi-25kg/m3, inani eliphelele le-HPMC liyi-0.6% yenani likasimende, isilinganiso samanzi-samende ngu-0.42, isilinganiso sesihlabathi singama-40%, futhi ukukhishwa kwe-naphthyl superplasticizer kungamaphesenti angu-8 yenani likasimende. , Izibonelo zekhonkrithi emoyeni izinsuku ezingu-28 zinamandla ajwayelekile angu-42.6MPa, kanti ukhonkolo othululwe ngaphansi kwamanzi izinsuku ezingu-28 ngethonsi yamanzi engu-60mm unamandla ajwayelekile angu-36.4 MPa.
1. Ukwengezwa kwe-HPMC kunomphumela osobala wokuhlehlisa ingxube yodaka. Ngokukhula kokuqukethwe kwe-HPMC, isikhathi sokusetha sodaka siyakhula kancane kancane. Ngaphansi kokuqukethwe okufanayo kwe-HPMC, udaka olwakhiwe ngaphansi kwamanzi lungcono kunodaka olwakhiwe emoyeni. Isikhathi sokuqina sokubumba side. Lesi sici sisiza ukumpompa ukhonkolo ngaphansi kwamanzi.
2. Udaka olusha lukasimende oluxutshwe ne-hydroxypropyl methylcellulose lusebenza kahle ngokuhlanganisa futhi alophi neze.
3. Okuqukethwe yi-HPMC kanye nesidingo samanzi osimende kwehle kuqala kwase kunyuka kakhulu.
4. Ukufakwa kwe-ejenti yokunciphisa amanzi kuthuthukisa inkinga yokwanda kwesidingo samanzi sodaka, kodwa kufanele kulawulwe ngokunengqondo, kungenjalo ngezinye izikhathi kuzonciphisa ukumelana nokuhlakazeka ngaphansi kwamanzi kodaka lukasimende olusanda kuxutshwa.
5. Kunomehluko omncane ekwakhekeni kwesifanekiso sokunamathisela usimende esixutshwe ne-HPMC kanye nesifanekiso esingenalutho, futhi kunomehluko omncane esakhiweni nasekumitheni kwesifanekiso sokunamathisela usimende ekuthululeni amanzi nomoya. Isampula elakhiwe ngemva kwezinsuku ezingama-28 ngaphansi kwamanzi liyaxega kancane. Isizathu esiyinhloko ukuthi ukungezwa kwe-HPMC kunciphisa kakhulu ukulahlekelwa nokuhlakazwa kukasimende ngesikhathi sokuthululwa kwamanzi, kodwa futhi kunciphisa ukubumbana kwetshe likasimende. Kuphrojekthi, inani le-HPMC kufanele lehliswe ngangokunokwenzeka ngenkathi kuqinisekiswa umphumela wokungahlakazeka ngaphansi kwamanzi.
6. Inhlanganisela ye-HPMC ngaphansi kwamanzi ingxube kakhonkolo engahlakazeki, ukulawulwa kwenani kuhambisana nokuthuthukiswa kwamandla. Amaphrojekthi okulinga abonise ukuthi ukhonkolo owenziwe emanzini unesilinganiso samandla esingu-84.8% salokho okwakhiwa emoyeni, futhi umphumela ubaluleke nakakhulu.
Isikhathi sokuthumela: Jun-16-2023