Zaɓin 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 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 daban-daban da ƙari na ethers cellulose kuma suna da tasiri daban-daban akan haɓaka aikin busassun busassun turmi. A halin yanzu, yawancin masonry da plastering turmi suna da ƙarancin aikin riƙe ruwa, kuma slurry na ruwa zai rabu bayan ƴan mintuna kaɗan na tsaye. Don haka yana da mahimmanci don ƙara ether cellulose a cikin turmi siminti.
A cikin turmi da aka shirya, idan dai ɗan ƙaramin ether na cellulose zai iya inganta aikin rigar turmi sosai, ana iya ganin cewa ether cellulose shine babban ƙari wanda ke shafar aikin ginin turmi. "
Cellulose ether - iska-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, irin su ƙara 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. Kullum 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 ƙwayar cellulose ether yana ƙaruwa da sauri, kuma tasirin sa na iska yana kula da zama cikakke. Don haka yana nuna a matsayin sakamako mai kauri ko karuwa a buƙatar ruwa.
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.
Cellulose ether - riƙe ruwa
Riƙewar ruwa muhimmin aiki ne na methyl cellulose ether, kuma yana aiki ne da yawancin masana'antun bushe-bushe na gida, musamman waɗanda ke yankunan kudu da yanayin zafi, 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 wani lokaci Lokacin da matakin riƙewar ruwa ya ƙaru, yanayin yanayin riƙewar ruwa yana raguwa; lokacin da yanayin zafi ya tashi, yawan ruwa na ether cellulose yakan ragu, amma wasu ethers cellulose da aka gyara kuma suna da mafi kyawun kiyaye ruwa a ƙarƙashin yanayin zafi mai girma; fibers tare da ƙananan digiri na maye gurbin Vegan ether 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; da ruwa kwayoyin da cellulose ether kwayoyin sarkar Interdiffusion damar ruwa kwayoyin shiga cikin ciki na cellulose ether macromolecular sarkar kuma yana karkashin karfi dauri sojojin, game da shi samar da free ruwa, entangled ruwa, da kuma inganta ruwa riƙe da ciminti slurry; cellulose ether yana inganta sabobin ciminti slurry The rheological Properties, porous cibiyar sadarwa tsarin da osmotic matsa lamba ko fim-forming Properties na cellulose ether hana yaduwar ruwa.
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, kuma yana haɓaka aikin rigakafin sagging 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 homogeneity na freshly gauraye kayan, hana abu delamination, segregation da zub da jini, kuma za a iya amfani da fiber kankare, karkashin ruwa kankare da kai compacting kankare.
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 high 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. Saboda haka, cellulose ethers na wannan danko sa, ko da MC, HPMC, HEMC, za su kullum nuna iri rheological Properties idan dai da maida hankali da kuma zafin jiki suna kiyaye 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.
Lokacin aikawa: Dec-01-2022