A cikin shirye-shiryen turmi, kawai ƙaramin ether cellulose zai iya inganta aikin rigar turmi. Ana iya ganin cewa ether cellulose shine babban abin da ke shafar aikin aikin turmi.
Zaɓin nau'ikan ethers na cellulose daban-daban tare da viscosities daban-daban, nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan danko da ƙari daban-daban za su sami sakamako daban-daban akan haɓaka aikin turmi na drymix. A halin yanzu, yawancin masonry da plastering turmi suna da ƙarancin aikin riƙe ruwa. Ruwa da slurry za su rabu bayan ƴan mintuna kaɗan na tsayawa. Don haka yana da mahimmanci don ƙara ether cellulose zuwa turmi siminti.
Bari mu kalli rawar da ether cellulose ke taka a turmi siminti!
1. Cellulose ether - Riƙewar ruwa
Riƙewar ruwa muhimmin aiki ne na methyl cellulose ether, kuma yana aiki ne da yawancin masana'antun bushe-bushe na gida ke haɗa turmi, musamman waɗanda ke yankunan kudanci tare da yanayin zafi mai girma suna kula da su. A cikin samar da kayan gini, musamman busassun turmi, ether cellulose yana taka rawar da ba za a iya maye gurbinsa ba, musamman wajen samar da turmi na musamman (turmi da aka gyara), wani abu ne mai mahimmanci kuma mai mahimmanci.
Danko, sashi, zafin yanayi da tsarin kwayoyin halitta na ether cellulose suna da tasiri mai yawa akan aikin rike ruwa. A karkashin yanayi guda, mafi girman danko na ether cellulose, mafi kyawun kiyaye ruwa; Mafi girman sashi, mafi kyawun riƙewar ruwa. Yawancin lokaci, ƙaramin adadin ether na cellulose zai iya inganta haɓakar ruwa na turmi sosai. Lokacin da adadin ya kai ga wani takamaiman, lokacin da matakin riƙewar ruwa ya karu, yanayin yanayin riƙewar ruwa yana raguwa; Lokacin da yanayin zafi ya tashi, riƙewar ruwa na ether cellulose yakan ragu. Amma wasu ethers cellulose da aka gyara kuma suna da mafi kyawun riƙe ruwa a ƙarƙashin yanayin zafi mai yawa; Cellulose ether tare da ƙananan digiri na maye gurbin yana da mafi kyawun aikin riƙe ruwa.
Ƙungiyar hydroxyl a kan kwayoyin cellulose ether da oxygen atom a kan ether bond za su haɗu da kwayoyin ruwa don samar da haɗin hydrogen, juya ruwan kyauta zuwa ruwa mai ɗaure, don haka yana taka muhimmiyar rawa wajen riƙe ruwa;Thekwayoyin ruwa da kuma cellulose ether kwayoyin sarkar Interdiffusion damar ruwa kwayoyin shiga cikin ciki na cellulose ether macromolecular sarkar kuma yana ƙarƙashin karfi dauri sojojin, game da shi samar da free ruwa, entangled ruwa, da kuma inganta ruwa riƙe da ciminti slurry; Cellulose ether yana inganta sabon siminti slurry's rheological Properties, porous cibiyar sadarwa tsarin da osmotic matsa lamba ko fim-forming Properties na cellulose ether hana yaduwar ruwa.
2. Cellulose ethers - Thickening da Thixotropy
Cellulose ether yana ba da rigar turmi tare da ingantacciyar danko, wanda zai iya haɓaka ikon haɗin kai tsakanin rigar turmi da tushe mai tushe, da haɓaka aikin anti-sag na turmi. Ana amfani dashi ko'ina a cikin plastering turmi, bulo bonding turmi da waje rufi tsarin. A thickening sakamako na cellulose ether kuma iya ƙara anti-watsawa ikon da kuma homogeneity na freshly gauraye kayan, hana abu delamination da rarrabuwa. Ana iya amfani dashi a cikin simintin fiber, simintin ruwa na karkashin ruwa da kuma kankare mai sarrafa kansa.
Sakamakon kauri na ether cellulose akan kayan tushen siminti ya fito ne daga danko na ether ether cellulose. A karkashin irin wannan yanayin, mafi girman danko na ether cellulose, mafi kyawun danko na kayan da aka gyara na siminti, amma idan danko ya yi yawa, zai shafi ruwa da aiki na kayan (kamar manne wuka mai laushi). ). Turmi mai ɗorewa da kai da kankare, wanda ke buƙatar babban ruwa, yana buƙatar ƙarancin danko na ether cellulose. Bugu da ƙari, tasirin daɗaɗɗen ether na cellulose zai ƙara yawan buƙatar ruwa na kayan da aka gina da siminti da kuma ƙara yawan yawan turmi.
High-danko cellulose ether ruwa bayani yana da babban thixotropy, wanda kuma shi ne babban hali na cellulose ether. Maganin ruwa mai ruwa na methyl cellulose yawanci suna da pseudoplastic da kuma ruwan da ba na thixotropic a ƙasa da zafin gel ɗin sa, amma suna nuna kaddarorin kwararar Newtonian a ƙananan ƙimar ƙarfi. Pseudoplasticity yana ƙaruwa tare da nauyin kwayoyin halitta ko tattarawar ether cellulose, ba tare da la'akari da nau'in maye gurbin da matakin maye gurbin ba. Don haka, ethers cellulose na darajar danko guda ɗaya, ko HPMC ne ko HEMC, koyaushe za su nuna halayen rheological iri ɗaya muddin ana kiyaye maida hankali da zafin jiki akai-akai. Ana samar da gels na tsari lokacin da zafin jiki ya tashi, kuma ana samun kwararar thixotropic sosai.
Babban maida hankali da ƙananan danko ethers cellulose suna nuna thixotropy ko da a ƙasa da zafin jiki na gel. Wannan kadarar tana da fa'ida mai yawa ga daidaitawar daidaitawa da sagging a cikin ginin ginin turmi. Ya kamata a bayyana a nan cewa mafi girman danko na ether cellulose, mafi kyawun riƙewar ruwa, amma mafi girma da danko, mafi girman nauyin kwayoyin halitta na cellulose ether, da kuma raguwa mai dacewa a cikin solubility, wanda yana da mummunan tasiri. a kan turmi maida hankali da aikin yi.
3. Cellulose ether - Air-entraining sakamako
Cellulose ether yana da tabbataccen tasiri na motsa iska akan sabbin kayan tushen siminti. Cellulose ether yana da ƙungiyoyi biyu na hydrophilic (ƙungiyoyin hydroxyl, ƙungiyoyin ether) da ƙungiyoyin hydrophobic (ƙungiyoyin methyl, zoben glucose), kuma yana da surfactant tare da aikin saman, don haka yana da tasirin iska. Hanyoyin haɓakar iska na ether cellulose zai haifar da sakamako na "ball", wanda zai iya inganta aikin aiki na kayan da aka haɗa da sabo, kamar haɓaka filastik da santsi na turmi a lokacin aiki, wanda ke taimakawa wajen yada turmi. ; zai kuma kara yawan fitowar turmi , rage farashin samar da turmi; amma zai ƙara porosity na kayan da aka taurare kuma ya rage kayan aikin injinsa kamar ƙarfi da na roba.
A matsayinsa na surfactant, cellulose ether shima yana da tasirin jika ko mai a jikin siminti, wanda ke ƙara yawan ruwan siminti tare da tasirin sa na motsa iska, amma tasirinsa mai kauri zai rage ruwa. Tasirin ruwa shine hadewar filastik da tasirin sakamako. Gabaɗaya magana, lokacin da abun ciki na ether cellulose ya ragu sosai, babban aikin shine filastik ko rage ruwa; lokacin da abun ciki ya yi girma, tasirin tasirin ether na cellulose yana ƙaruwa da sauri, kuma tasirin sa na iska yana ƙoƙarin zama cikakke. Don haka yana nuna a matsayin sakamako mai kauri ko karuwa a buƙatar ruwa.
4. Cellulose Ether - Retardation
Cellulose ether zai tsawaita lokacin saitin siminti ko turmi, kuma yana jinkirta hydration kinetics na siminti, wanda ke da fa'ida don inganta lokacin aiki na kayan da aka haɗa sabo, inganta daidaiton turmi da asarar slump na kankare na tsawon lokaci, amma yana iya yiwuwa. kuma yana haifar da tsaikon ci gaban ginin.
Lokacin aikawa: Juni-02-2023