Siminti-tushen yumbu tile m a halin yanzu mafi girma aikace-aikace na musamman busassun hadawa turmi, wanda shi ne wani nau'i na siminti a matsayin babban siminti abu da kuma supplementation da gradation na tara, ruwa mai kula da ruwa, farkon ƙarfi wakili, latex foda da sauran Organic ko inorganic. admixtures.Yawancin lokaci ana amfani da shi kawai tare da haɗuwa da ruwa, idan aka kwatanta da turmi na ciminti na yau da kullum, zai iya inganta ƙarfin haɗin gwiwa tsakanin kayan karewa da kayan tushe, yana da kyau anti-zamewa kuma yana da kyakkyawan juriya na ruwa, juriya mai zafi da daskarewa-thawing sake zagayowar, yafi amfani da shi. don liƙa fale-falen bango na ciki da na waje, fale-falen fale-falen buraka da sauran kayan ado, Ana amfani da shi sosai a cikin kayan ado na bango, benaye, dakunan wanka, kicin da sauran gine-gine.Shi ne abin da aka fi amfani da shi na yumbu mai ɗamara.
Yawancin lokaci idan muka yi hukunci game da aikin yumbu tayal m, ban da kula da aikinta na aiki, anti-sliding ikon, amma kuma kula da ta inji ƙarfi da kuma bude lokaci.Cellulose ether a kan yumbu tayal m ban da shafi rheological Properties na ain manne, kamar santsi aiki yi, sanda wuka halin da ake ciki, amma kuma a kan inji Properties na yumbu tayal m yana da karfi tasiri.
1. Budelokaci
Lokacin da roba foda da cellulose ether sun kasance a cikin rigar turmi, wasu samfurori sun nuna cewa roba foda yana da makamashi mai karfi don manne wa samfuran hydration na siminti, kuma ether cellulose ya kasance mafi a cikin ruwan rata, wanda ke rinjayar danko da saita lokacin turmi. Kara.Tashin hankali na ether na cellulose ya fi girma fiye da foda na roba, kuma wadatar da ƙarin ether cellulose a turmi yana da amfani ga samuwar haɗin hydrogen tsakanin jirgin sama da cellulose ether.
Danshi evaporation daga cikin rigar turmi, turmi, cellulose ether a cikin surface wadata, 5 minutes iya samar da wani membrane a kan surface na turmi, zai rage evaporation kudi na bi-up, tare da ƙarin ruwa daga slurry lokacin farin ciki part. matsawa zuwa turmi Layer ya fi sirara, buɗaɗɗen wuraren da aka narkar da su lokacin da farkon samuwar membrane, ƙaura na ruwa na iya kawo ƙarin haɓakar ether na cellulose a cikin turmi a saman.
Samuwar fim ɗin ether cellulose a saman turmi yana da babban tasiri akan kaddarorin turmi:
Na farko, fim ɗin da aka kafa yana da bakin ciki sosai, za a narkar da shi sau biyu, ba zai iya ƙayyade ƙashin ruwa ba, rage ƙarfin.
Biyu, samuwar fim din ya yi yawa sosai, ether cellulose a cikin turmi rata ruwa taro ne high, danko, a lokacin da yumbu tile manna ba sauki karya surface na fim.
Ana iya ganin cewa fim din da ke samar da aikin cellulose ether yana da tasiri mai girma akan lokacin budewa.Nau'in ether cellulose (HPMC, HEMC, MC, da dai sauransu) da digiri na etherification (digiri na maye gurbin) kai tsaye yana shafar aikin fim na ether na cellulose, zuwa ga tauri da taurin fim ɗin.
2, ƙarfin zana
Cellulose ether ba kawai yana ba da turmi tare da duk abubuwan da ke sama masu fa'ida ba, har ma yana jinkirta haɓakar hydration na siminti.Wannan retarded sakamako ne yafi saboda adsorption na cellulose ether kwayoyin a kan daban-daban ma'adinai matakai a cikin siminti tsarin da ake hydrated, amma an yarda da cewa cellulose ether kwayoyin suna yafi adsorbed a hydration kayayyakin kamar CSH da calcium hydroxide, kuma da wuya adsorbed a kan. ainihin ma'adinai lokaci na clinker.Bugu da ƙari, ether cellulose yana rage ions (Ca2+, SO42-, ...) saboda ƙarar danko na maganin pore.Ayyuka a cikin maganin pore, wanda ya kara jinkirta tsarin hydration.
Danko wani muhimmin siga ne, wanda ke wakiltar sinadarai na ether cellulose.Kamar yadda aka ambata a sama, danko yafi rinjayar iyawar ruwa, kuma yana da tasiri mai mahimmanci akan aikin sabon turmi.Duk da haka, binciken gwajin ya gano cewa danko na ether cellulose ba shi da wani tasiri a kan hydration kinetics na siminti.Nauyin kwayoyin halitta yana da ɗan tasiri akan hydration, kuma babban bambanci tsakanin nau'ikan nau'ikan kwayoyin halitta shine kawai 10min.Saboda haka, nauyin kwayoyin ba shine maɓalli na maɓalli don sarrafa ruwan siminti ba.
"Cellulose ether a cikin siminti tushen busassun kayan turmi a cikin aikace-aikacen" ya nuna a fili cewa jinkirin ether cellulose ya dogara da tsarin sinadarai.Tsarin gabaɗaya shine don MHEC, mafi girman matakin methylation, ƙaramar tasirin retarding na ether cellulose.Bugu da ƙari, maye gurbin hydrophilic (kamar maye gurbin HEC) yana da tasiri mai karfi na jinkiri fiye da maye gurbin hydrophobic (kamar maye gurbin MH, MHEC da MHPC).Sakamakon retarding na ether cellulose ya fi shafar sigogi biyu na nau'i da adadin ƙungiyoyin da aka maye gurbinsu.
Gwajin mu na yau da kullun kuma ya gano cewa abubuwan da ke maye gurbin suna taka muhimmiyar rawa a cikin ƙarfin injin yumbura m.Mun kimanta aikin HPMC tare da digiri daban-daban na maye gurbin a cikin mannen tayal yumbu, kuma mun gwada tasirin ether cellulose mai ɗauke da ƙungiyoyi daban-daban a ƙarƙashin yanayi daban-daban na warkarwa akan kayan aikin injin yumbura m.Tasirin abun ciki na DS da MS akan ƙarfin zane na tile yumbu a zafin jiki.
HPMC ita ce ether mai hadewa, don haka idan aka hada adadi guda biyu, ga HPMC, akwai bukatar samar da wani digiri na samar da ruwa, don tabbatar da narkewar ruwa da watsawa, mun san cewa abubuwan da ke maye gurbin su ma suna tantance zafin gel na HPMC. , wanda shine don ƙayyade amfani da yanayin HPMC, Ta wannan hanyar, an tsara abun cikin rukuni na HPMC a cikin kewayon.A cikin wannan kewayon, yadda ake haɗa methoxy da hydroxypropoxy don cimma sakamako mafi kyau shine abun ciki na bincikenmu.A cikin wani kewayon, haɓakar abun ciki na methoxy zai haifar da haɓakar haɓakar ƙarfin zane, yayin da haɓaka abun ciki na hydroxypropoxy zai haifar da haɓakar haɓakar ƙarfin zane.Akwai irin wannan tasiri akan lokacin buɗewa.
Lokacin aikawa: Dec-20-2021