Hydroxypropyl methyl cellulose
Saitin gwajin lokaci
A saitin lokaci na kankare ne yafi alaka da saitin lokaci na ciminti, tara tasiri ba babba, don haka saitin lokaci na turmi za a iya amfani da wuri na nazarin HPMC ga karkashin ruwa ba watsawa kankare saitin lokaci, da tasiri na cakude saboda da saitin lokaci ta ruwa-ciminti rabo na turmi, ciminti yashi rabo sakamako, don haka domin a kimanta HPMC da turmi lokaci rabo na turmi-saitin rabo, da ruwa-satin rabo na turmi lokaci. bukatar gyara.
HPMC shine tsarin layi na macromolecule, tare da ƙungiyar hydroxyl akan ƙungiyar masu aiki, wanda zai iya samar da haɗin gwiwar hydrogen tare da haɗakar da kwayoyin ruwa da kuma ƙara danko na ruwa mai gauraya. Dogayen sarƙoƙin ƙwayoyin cuta na HPMC za su jawo hankalin junansu, ta yadda kwayoyin HPMC suna haɗa juna don samar da tsarin hanyar sadarwa, siminti, nannade ruwa. Saboda HPMC yana samar da tsarin hanyar sadarwa mai kama da fim na bakin ciki da tasirin siminti, zai hana fitar da danshi a turmi yadda ya kamata, hanawa ko rage yawan hydration na siminti.
Gwajin zubar da ruwa
Halin zubar jini na ruwa na turmi yana kama da na kankare, wanda zai haifar da sulhu mai tsanani, zai haifar da karuwar yawan ruwa-ciminti na saman Layer na slurry, kuma ya sa saman Layer na slurry ya sami babban shrinkage na filastik ko ma fatattaka a farkon mataki, kuma ƙarfin saman Layer na slurry yana da rauni. Daga gwajin, ana iya ganin cewa lokacin da adadin haɗuwa ya wuce 0.5%, babu wani abin da ya faru na zubar ruwa. Wannan saboda lokacinHPMCan gauraye shi cikin turmi, HPMC yana da samuwar fim da tsarin hanyar sadarwa, da kuma adsorption na hydroxyl a kan doguwar sarkar macromolecules, ta yadda simintin da ke cikin turmi ya zama flocculation, don tabbatar da tsayayyen tsarin turmi. Bayan ƙara HPMC a cikin turmi kuma, za a samar da ƙananan kumfa masu zaman kansu da yawa. Za a rarraba waɗannan kumfa daidai gwargwado a cikin turmi kuma su hana jigon jimillar. HPMC da fasaha yi na siminti tushen kayan da babban tasiri, sau da yawa amfani da su shirya kamar busassun turmi, polymer turmi da sauran sabon siminti tushen hada kayan, sabõda haka, yana da kyau ruwa riƙewa, plasticity.
Lokacin aikawa: Afrilu-26-2024