A cikin 'yan shekarun nan, tare da ci gaba da haɓaka fasahar rufin bango ta waje, ci gaba da ci gaban fasahar samar da cellulose, da kuma kyawawan halaye na HPMC kanta, an yi amfani da HPMC sosai a masana'antar gini.
Domin ƙarin bincike kan yadda ake aiwatar da aiki tsakanin kayan HPMC da na siminti, wannan takarda ta mayar da hankali kan tasirin inganta HPMC akan haɗin kai na kayan da aka yi da siminti.
lokacin zubar jini
Lokacin saita siminti yana da alaƙa da lokacin saita siminti, kuma tarin ba shi da tasiri sosai, don haka ana iya amfani da lokacin saita turmi maimakon haka don nazarin tasirin HPMC akan lokacin saita cakuda siminti mara narkewa a ƙarƙashin ruwa, saboda lokacin saita turmi yana shafar ruwa. Saboda haka, domin a kimanta tasirin HPMC akan lokacin saita turmi, ya zama dole a daidaita rabon ruwa-siminti da rabon turmi na turmi.
A cewar gwajin, ƙarin HPMC yana da tasiri mai mahimmanci akan cakuda turmi, kuma lokacin saita turmi yana tsawaita a jere tare da ƙaruwar abun ciki na HPMC. A ƙarƙashin irin wannan abun ciki na HPMC, turmi da aka ƙera a ƙarƙashin ruwa ya fi sauri fiye da turmi da aka samar a cikin iska. Lokacin saita matsakaicin ƙera ya fi tsayi. Idan aka auna shi da ruwa, idan aka kwatanta da samfurin da babu komai, lokacin saita turmi da aka haɗa da HPMC yana jinkiri da awanni 6-18 don saitin farko da awanni 6-22 don saitin ƙarshe. Saboda haka, ya kamata a yi amfani da HPMC tare da masu haɓaka.
HPMC wani nau'in polymer ne mai yawan ƙwayoyin halitta wanda ke da tsarin layi na macromolecular da kuma rukunin hydroxyl a cikin rukunin aiki, wanda zai iya samar da haɗin hydrogen tare da ƙwayoyin ruwan da ke haɗuwa da kuma ƙara ɗanko na ruwan haɗuwa. Dogayen sarƙoƙin ƙwayoyin halitta na HPMC za su jawo hankalin juna, suna sa ƙwayoyin HPMC su haɗu da juna don samar da tsarin sadarwa, suna naɗa siminti da haɗa ruwa. Tunda HPMC tana samar da tsarin sadarwa kamar fim kuma tana naɗa siminti, zai hana ruwa ya yi turmi yadda ya kamata, kuma zai hana ko rage yawan ruwan da simintin ke fitarwa.
Zubar jini
Lamarin zubar jini na turmi yayi kama da na siminti, wanda zai haifar da raguwar taro mai yawa, wanda ke haifar da ƙaruwa a rabon ruwa da siminti na saman Layer na slurry, yana haifar da raguwar babban filastik na saman Layer na slurry a matakin farko, har ma da fashewa, da kuma ƙarfin saman Layer na slurry. Yana da rauni sosai.
Idan adadin ya wuce 0.5%, babu wani abin da ke haifar da zubar jini. Wannan ya faru ne saboda lokacin da aka haɗa HPMC a cikin turmi, HPMC yana da tsarin samar da fim da hanyar sadarwa, kuma shaƙar rukunin hydroxyl akan dogon sarkar macromolecules yana sa siminti da ruwan da ke haɗa su a cikin turmi su zama flocculation, yana tabbatar da tsarin turmi mai ƙarfi. Bayan ƙara HPMC a cikin turmi, za a samar da ƙananan kumfa na iska masu zaman kansu da yawa. Waɗannan kumfa na iska za su rarraba daidai a cikin turmi kuma su hana ajiyar tarin. Ayyukan fasaha na HPMC yana da babban tasiri akan kayan da aka yi da siminti, kuma galibi ana amfani da shi don shirya sabbin kayan haɗin siminti kamar busasshen turmi da turmi na polymer, don haka yana da kyakkyawan riƙe ruwa da riƙe filastik.
Bukatar ruwan turmi
Idan adadin HPMC ya yi ƙanƙanta, yana da tasiri sosai kan buƙatar ruwa na turmi. Idan aka kiyaye matakin faɗaɗa turmi na sabo iri ɗaya ne, yawan HPMC da buƙatar ruwa na turmi suna canzawa a cikin alaƙar layi a cikin wani lokaci, kuma buƙatar ruwa na turmi da farko yana raguwa sannan ya ƙaru a bayyane. Lokacin da adadin HPMC ya ƙasa da 0.025%, tare da ƙaruwar adadin, buƙatar ruwa na turmi yana raguwa a ƙarƙashin matakin faɗaɗa iri ɗaya, wanda ke nuna cewa lokacin da adadin HPMC ya yi ƙanƙanta, yana da tasirin rage ruwa akan turmi, kuma HPMC yana da tasirin shiga iska. Akwai adadi mai yawa na ƙananan kumfa iska masu zaman kansu a cikin turmi, kuma waɗannan kumfa iska suna aiki azaman mai don inganta ruwan turmi. Lokacin da adadin ya fi 0.025%, buƙatar ruwa na turmi yana ƙaruwa tare da ƙaruwar adadin. Wannan kuwa saboda tsarin hanyar sadarwa na HPMC ya ƙara cika, kuma gibin da ke tsakanin flocs ɗin akan dogon sarkar kwayoyin halitta ya gajarta, wanda ke da tasirin jan hankali da haɗin kai, kuma yana rage ruwan turmi. Saboda haka, a ƙarƙashin yanayin cewa matakin faɗaɗawa iri ɗaya ne, slurry yana nuna ƙaruwar buƙatar ruwa.
01. Gwajin juriyar warwatsewa:
Maganin wargajewa muhimmin ma'aunin fasaha ne don auna ingancin maganin wargajewa. HPMC wani mahaɗin polymer ne mai narkewar ruwa, wanda kuma aka sani da resin mai narkewar ruwa ko polymer mai narkewar ruwa. Yana ƙara daidaiton cakuda ta hanyar ƙara danko na ruwan gauraya. Abu ne mai hydrophilic polymer wanda zai iya narkewa a cikin ruwa don samar da mafita. ko wargajewa.
Gwaje-gwaje sun nuna cewa lokacin da adadin superplasticizer mai inganci mai inganci wanda aka yi da naphthalene ya ƙaru, ƙara superplasticizer zai rage juriyar wargajewa na turmi siminti da aka haɗa sabo. Wannan saboda na'urar rage ruwa mai inganci mai inganci wanda aka yi da naphthalene wani abu ne mai surfactant. Lokacin da aka ƙara na'urar rage ruwa a turmi, na'urar rage ruwa za ta kasance a saman barbashin siminti don sa saman barbashin siminti su sami irin wannan caji. Wannan wutar lantarki yana sa barbashin siminti su kasance. Tsarin flocculation na simintin ya wargaje, kuma ruwan da aka naɗe a cikin tsarin ya fito, wanda zai haifar da asarar wani ɓangare na simintin. A lokaci guda, an gano cewa tare da ƙaruwar abun ciki na HPMC, juriyar wargajewa na turmi siminti na sabo yana ƙara kyau.
02. Halayen ƙarfi na siminti:
A cikin wani aikin ginin harsashi na gwaji, an yi amfani da cakuda siminti na HPMC a ƙarƙashin ruwa wanda ba ya warwatsewa, kuma ƙarfin ƙira shine C25. A cewar gwajin asali, adadin siminti shine 400kg, hayakin silica mai haɗaka shine 25kg/m3, mafi kyawun adadin HPMC shine 0.6% na adadin siminti, rabon ruwa da siminti shine 0.42, ƙimar yashi shine 40%, kuma fitarwa na naphthalene mai inganci shine rage ruwa. Adadin siminti shine 8%, matsakaicin ƙarfin siminti 28d na samfurin siminti a cikin iska shine 42.6MPa, matsakaicin ƙarfin siminti na ƙarƙashin ruwa mai tsayin digo 60mm shine 36.4MPa, kuma rabon ƙarfi na simintin da aka samar da ruwa zuwa simintin da aka samar da iska shine 84.8%, tasirin ya fi mahimmanci.
03. Gwaje-gwaje sun nuna:
(1) Ƙara HPMC yana da tasiri mai kyau ga cakuda turmi. Tare da ƙaruwar abun ciki na HPMC, lokacin saita turmi yana ƙaruwa a jere. A ƙarƙashin irin wannan abun ciki na HPMC, turmi da aka samar a ƙarƙashin ruwa ya fi sauri fiye da wanda aka samar a cikin iska. Lokacin saitawa na matsakaicin ƙera ya fi tsayi. Wannan fasalin yana da amfani ga famfo na siminti a ƙarƙashin ruwa.
(2) Turmin siminti da aka haɗa da hydroxypropyl methylcellulose yana da kyawawan halaye masu haɗin kai kuma kusan babu zubar jini.
(3) Adadin HPMC da buƙatar ruwa na turmi sun ragu da farko sannan suka ƙaru a bayyane.
(4) Haɗa sinadarin rage ruwa yana inganta matsalar ƙaruwar buƙatar ruwa ga turmi, amma dole ne a sarrafa yawansa yadda ya kamata, in ba haka ba juriyar wargajewar turmi na siminti mai gauraye a ƙarƙashin ruwa wani lokacin zai ragu.
(5) Babu bambanci sosai a tsarin tsakanin samfurin manna siminti da aka haɗa da HPMC da samfurin da babu komai a ciki, kuma babu bambanci sosai a cikin tsari da yawan samfurin manna siminti da aka zuba a cikin ruwa da iska. Samfurin da aka samar a ƙarƙashin ruwa na tsawon kwanaki 28 yana da ɗan kauri. Babban dalilin shine ƙara HPMC yana rage asarar siminti da yaɗuwa sosai lokacin zuba ruwa, amma kuma yana rage ƙanƙantar dutsen siminti. A cikin aikin, a ƙarƙashin yanayin tabbatar da tasirin rashin wargajewa a ƙarƙashin ruwa, ya kamata a rage yawan HPMC gwargwadon iko.
(6) Ƙara ruwan HPMC a ƙarƙashin ruwa wanda ba ya warwatsewa, sarrafa yawan da ake buƙata yana da amfani ga ƙarfi. Aikin gwaji ya nuna cewa rabon ƙarfi na simintin da aka samar da ruwa da simintin da aka samar da iska shine kashi 84.8%, kuma tasirin yana da matuƙar muhimmanci.
Lokacin Saƙo: Mayu-06-2023