A cikin 'yan shekarun nan, tare da ci gaba da haɓaka fasahar fasahar bangon waje, ci gaba da ci gaban fasahar samar da cellulose, da kyawawan halaye na HPMC kanta, HPMC an yi amfani dashi sosai a cikin masana'antar gine-gine.
Don ƙarin bincika tsarin aiki tsakanin HPMC da kayan da aka dogara da siminti, wannan takarda tana mai da hankali kan ingantaccen tasirin HPMC akan abubuwan haɗin gwiwar kayan da aka gina da siminti.
lokacin zubar jini
Saitin lokacin kankare yana da alaƙa da lokacin saitin siminti, kuma jimlar yana da ɗan tasiri, don haka ana iya amfani da lokacin saitin turmi maimakon yin nazarin tasirin HPMC akan saitin lokacin cakuda kankare na karkashin ruwa ba tare da rarrabuwa ba, saboda lokacin saitin turmi yana shafar ruwa Don haka, don kimanta tasirin HPMC akan lokacin saita turmi, ya zama dole a gyara ma'aunin siminti na ruwa da simintin turmi.
Dangane da gwajin, ƙari na HPMC yana da tasiri mai mahimmanci na jinkirtawa akan cakuda turmi, kuma saita lokacin turmi yana tsawaita a jere tare da haɓaka abun ciki na HPMC. A karkashin irin wannan abun ciki na HPMC, turmi da aka ƙera a ƙarƙashin ruwa ya fi sauri fiye da turmi da aka yi a cikin iska. Lokacin saitin matsakaicin gyare-gyare ya fi tsayi. Lokacin da aka auna a cikin ruwa, idan aka kwatanta da samfurin mara kyau, lokacin saitin turmi gauraye da HPMC yana jinkiri da sa'o'i 6-18 don saitin farko da sa'o'i 6-22 don saitin ƙarshe. Saboda haka, ya kamata a yi amfani da HPMC a hade tare da accelerators.
HPMC babban polymer polymer ne tare da tsarin layi na macromolecular da ƙungiyar hydroxyl akan rukunin aiki, wanda zai iya samar da haɗin gwiwar hydrogen tare da ƙwayoyin ruwa masu gauraya da haɓaka dankowar ruwa mai gauraya. Dogayen sarƙoƙi na ƙwayoyin cuta na HPMC za su jawo hankalin junansu, suna sa ƙwayoyin HPMC su manne da juna don samar da tsarin hanyar sadarwa, nade siminti da hada ruwa. Tunda HPMC ta samar da tsarin hanyar sadarwa mai kama da fim da nannade siminti, hakan zai hana yadda ruwa ya canza a turmi, kuma ya hana ko rage yawan hydration na simintin.
Jini
Al'amarin zub da jini na turmi yana kama da na siminti, wanda zai haifar da ɗimbin sulhu mai tsanani, wanda zai haifar da haɓakar rabon siminti na saman Layer na slurry, yana haifar da raguwar babban filastik na saman Layer na slurry a farkon. mataki, har ma da fatattaka, da kuma ƙarfin saman Layer na slurry Dan kadan mai rauni.
Lokacin da adadin ya kai sama da 0.5%, babu wani abin al'ajabi na jini. Wannan shi ne saboda lokacin da aka gauraya HPMC a cikin turmi, HPMC yana da tsarin shirya fim da tsarin hanyar sadarwa, kuma adsorption na ƙungiyoyin hydroxyl a kan dogon jerin macromolecules yana sa siminti da hadawar ruwa a cikin turmi su zama flocculation, yana tabbatar da tsayayyen tsari. na turmi. Bayan ƙara HPMC zuwa turmi, yawancin ƙananan kumfa masu zaman kansu za a samu. Wadannan kumfa na iska za a rarraba su daidai a cikin turmi kuma su hana jigilar jimillar. Ayyukan fasaha na HPMC yana da tasiri mai girma akan kayan da aka yi da siminti, kuma ana amfani dashi sau da yawa don shirya sababbin kayan haɗin gwiwar siminti irin su busassun foda da turmi polymer, don haka yana da kyakkyawan ajiyar ruwa da kuma riƙewar filastik.
Bukatar ruwan turmi
Lokacin da adadin HPMC yayi ƙanƙanta, yana da babban tasiri akan buƙatar ruwa na turmi. A cikin yanayin kiyaye darajar faɗaɗa sabon turmi iri ɗaya ne, abun ciki na HPMC da buƙatun ruwa na turmi suna canzawa a cikin alaƙar linzamin kwamfuta a cikin ɗan lokaci, kuma buƙatun ruwa na turmi ya fara raguwa sannan kuma yana ƙaruwa. a fili. Lokacin da adadin HPMC ya kasance ƙasa da 0.025%, tare da haɓakar adadin, buƙatun ruwa na turmi yana raguwa a ƙarƙashin digiri guda ɗaya, wanda ke nuna cewa idan adadin HPMC ya yi ƙanƙanta, yana da tasirin rage ruwa a cikin ruwa. turmi, kuma HPMC yana da tasirin motsa iska. Akwai adadi mai yawa na ƙananan kumfa masu zaman kansu a cikin turmi, kuma waɗannan kumfa na iska suna aiki azaman mai mai don haɓaka ruwan turmi. Lokacin da adadin ya fi 0.025%, buƙatar ruwa na turmi yana ƙaruwa tare da karuwar adadin. Wannan shi ne saboda tsarin cibiyar sadarwa na HPMC ya kara kammala, kuma an rage tazarar da ke tsakanin flocs a kan dogon sarkar kwayoyin halitta, wanda ke da tasirin sha'awa da haɗin kai, kuma yana rage yawan ruwa na turmi. Sabili da haka, a ƙarƙashin yanayin cewa matakin haɓakawa daidai yake, slurry yana nuna karuwar bukatar ruwa.
01. Gwajin juriyar watsawa:
Anti-watsawa shine mahimman ƙididdiga na fasaha don auna ingancin wakilin anti-watsawa. HPMC wani fili ne mai narkewar ruwa, wanda kuma aka sani da guduro mai narkewa ko ruwa mai narkewa. Yana ƙara daidaituwar cakuda ta hanyar ƙara danko na ruwa mai haɗuwa. Abu ne na polymer hydrophilic wanda zai iya narke cikin ruwa don samar da mafita. ko watsawa.
Gwaje-gwaje sun nuna cewa lokacin da adadin superplasticizer na tushen naphthalene ya karu, ƙari na superplasticizer zai rage juriyar watsawar turmi siminti da aka haɗa sabo. Wannan shi ne saboda naphthalene na tushen babban inganci mai rage ruwa shine surfactant. Lokacin da aka ƙara na'urar rage ruwa a cikin turmi, mai rage ruwa zai kasance a kan saman simintin simintin don sa saman simintin ya sami caji iri ɗaya. Wannan tarwatsewar wutar lantarki yana sanya sassan siminti su zama Tsarin ɗigon ruwa na simintin ya tarwatse, kuma an saki ruwan da aka naɗe a cikin tsarin, wanda zai haifar da asarar ɓangaren simintin. A lokaci guda, an gano cewa tare da karuwar abun ciki na HPMC, juriya na tarwatsa sabon turmi na ciminti yana samun mafi kyau kuma mafi kyau.
02. Halayen ƙarfi na kankare:
A cikin aikin kafuwar matukin jirgi, an yi amfani da abin da ba za a iya tarwatsawa a cikin ruwa na HPMC ba, kuma ƙarfin ƙira ya kasance C25. Bisa ga asali gwajin, adadin siminti ne 400kg, da compounded silica fume ne 25kg/m3, mafi kyau duka adadin na HPMC ne 0.6% na siminti adadin, ruwa-ciminti rabo ne 0.42, da yashi kudi ne 40%, da kuma fitar da naphthalene-tushen high-ingancin ruwa mai rage ruwa shine Adadin siminti shine 8%, matsakaicin ƙarfin 28d na da kankare samfurin a cikin iska ne 42.6MPa, da 28d matsakaicin ƙarfi na karkashin ruwa kankare tare da digo tsawo na 60mm ne 36.4MPa, da kuma ƙarfi rabo daga cikin ruwa-kafa ruwa zuwa iska-kafa kankare ne 84.8 %, sakamakon ya fi mahimmanci.
03. Gwaje-gwaje sun nuna:
(1) Ƙarin na HPMC yana da tasiri na ja da baya a fili akan cakuda turmi. Tare da haɓaka abun ciki na HPMC, lokacin saitin turmi yana ƙarawa a jere. A karkashin irin wannan abun ciki na HPMC, turmi da aka kafa a ƙarƙashin ruwa yana da sauri fiye da wanda aka samu a cikin iska. Lokacin saitin matsakaicin gyare-gyare ya fi tsayi. Wannan fasalin yana da fa'ida don yin famfo na ruwa a ƙarƙashin ruwa.
(2) Tumin siminti da aka gauraye da shi da hydroxypropyl methylcellulose yana da kyawawan halayen haɗin kai kuma kusan babu jini.
(3) Adadin HPMC da buƙatun ruwa na turmi ya ragu da farko sannan ya karu a fili.
(4) Haɗuwa da wakili mai rage ruwa yana inganta matsalar ƙara yawan buƙatun ruwa na turmi, amma dole ne a sarrafa adadinsa da kyau, in ba haka ba za a rage juriyar watsawar ruwa na turmi mai gauraye sabo a wasu lokuta.
(5) Bambanci kadan a tsarin tsakanin simintin manna samfurin da aka gauraya da HPMC da kuma wanda babu komai a ciki, kuma babu bambanci a cikin tsari da kuma yawan nau'in simintin da ake zubawa cikin ruwa da iska. Samfurin da aka samar a ƙarƙashin ruwa na tsawon kwanaki 28 yana ɗan ɗanɗano. Babban dalili kuwa shi ne, karin sinadarin HPMC yana matukar rage asara da tarwatsewar siminti a yayin da ake zuba ruwa, amma kuma yana rage dankon dutsen siminti. A cikin aikin, a ƙarƙashin yanayin tabbatar da tasirin rashin rarrabawa a ƙarƙashin ruwa, ya kamata a rage yawan adadin HPMC kamar yadda zai yiwu.
(6) Ƙara HPMC karkashin ruwa maras rarraba kankare admixture, sarrafa sashi yana da amfani ga ƙarfi. Aikin matukin jirgin ya nuna cewa karfin simintin da aka samar da ruwa da kuma iska ya kai kashi 84.8%, kuma tasirin yana da matukar muhimmanci.
Lokacin aikawa: Mayu-06-2023