Tile m na ɗaya daga cikin mafi girma aikace-aikace na musamman bushe-busasshen turmi a halin yanzu. Wannan wani nau'i ne na siminti a matsayin babban kayan siminti kuma an ƙara shi ta hanyar tarawa masu daraja, masu riƙe ruwa, ma'aikatan ƙarfi na farko, foda na latex da sauran abubuwan da ake buƙata na halitta ko inorganic. cakuda. Gabaɗaya, kawai yana buƙatar a haɗa shi da ruwa lokacin amfani da shi. Idan aka kwatanta da turmi na siminti na yau da kullun, zai iya inganta ƙarfin haɗin kai tsakanin kayan da ke fuskantar da ma'auni, yana da juriya mai kyau kuma yana da kyakkyawan juriya na ruwa da juriya na zafi. Kuma abũbuwan amfãni daga daskare-narke sake zagayowar juriya, yafi amfani da su manna gini ciki da kuma na waje bango fale-falen buraka, bene tiles da sauran kayan ado, yadu amfani a ciki da kuma na waje ganuwar, benaye, dakunan wanka, kitchens da sauran gine-gine ado wuraren, shi ne a halin yanzu. mafi yadu amfani yumbu tile bonding abu.
Yawancin lokaci idan muka yi la'akari da aikin mannen tayal, ba wai kawai kula da aikin sa ba da ikon hana zamewa, amma kuma kula da ƙarfin injinsa da lokacin buɗewa.Cellulose ethera cikin tayal m ba kawai rinjayar rheological Properties na ain m, kamar m aiki, wuka mai danko, da dai sauransu, amma kuma yana da karfi tasiri a kan inji Properties na tayal m. Tasiri kan lokacin buɗe tile m
Lokacin da emulsion foda da cellulose ether sun kasance a cikin rigar turmi, wasu bayanai sun nuna cewa emulsion foda yana da makamashi mai karfi don haɗawa da samfuran hydration na ciminti, kuma ether cellulose ya kasance mafi a cikin ruwa mai tsaka-tsaki, wanda ke rinjayar turmi mafi danko da saita lokaci. Tashin hankali na ether na cellulose ya fi girma fiye da na emulsion foda, kuma ƙarin haɓaka ether cellulose akan turmi zai zama da amfani ga samuwar hydrogen bond tsakanin tushe surface da cellulose ether.
A cikin rigar turmi, ruwan da ke cikin turmi yana ƙafe, kuma ana wadatar da ether na cellulose a saman, kuma za a samar da fim a saman turmin a cikin minti 5, wanda zai rage yawan fitar da ruwa na gaba, kamar yadda ruwa ya fi yawa. an cire shi daga turmi mai kauri Sashe na shi yana ƙaura zuwa ƙaramin turmi mai ɗanɗano, kuma fim ɗin da aka kafa a farkon ya narkar da wani yanki, kuma ƙaurawar ruwa zai kawo ƙarin haɓakar ether cellulose akan turmi.
Saboda haka, samuwar fim din ether cellulose a kan turmi yana da tasiri mai girma akan aikin turmi.
1) Fim ɗin da aka kafa yana da bakin ciki sosai kuma za a narkar da shi sau biyu, ba zai iya ƙayyade ƙashin ruwa ba kuma ya rage ƙarfin.
2) Fim ɗin da aka kafa yana da kauri sosai, ƙaddamar da ether na cellulose a cikin ruwa mai tsaka-tsakin turmi yana da girma, kuma danko yana da girma, don haka ba shi da sauƙi a karya fim ɗin saman lokacin da aka liƙa tayal.
Ana iya ganin cewa abubuwan da ke samar da fim na ether cellulose suna da tasiri mafi girma akan lokacin budewa. Nau'in ether cellulose (HPMC, HEMC, MC, da dai sauransu) da kuma digiri na etherification (digiri na maye gurbin) kai tsaye yana shafar abubuwan da ke samar da fim na cellulose ether, da taurin da taurin fim din.
Baya ga ba da abubuwan fa'ida da aka ambata a sama zuwa turmi, ether cellulose kuma yana jinkirta jinkirin motsin siminti. Wannan sakamako na retarding yafi saboda adsorption na cellulose ether kwayoyin akan nau'o'in ma'adinai daban-daban a cikin tsarin siminti ana shayar da su, amma gabaɗaya magana, ijma'i shine cewa kwayoyin ether cellulose sun fi shafa akan ruwa kamar CSH da calcium hydroxide. A kan samfuran sinadarai, ba kasafai ake tallata shi akan ainihin lokacin ma'adinai na clinker ba. Bugu da ƙari, ether cellulose yana rage motsi na ions (Ca2 +, SO42-, ...) a cikin maganin pore saboda karuwa a cikin danko na maganin pore, don haka ya kara jinkirta tsarin hydration.
Danko wani muhimmin siga ne, wanda ke wakiltar halayen sinadarai na ether cellulose. Kamar yadda aka ambata a sama, danko yafi rinjayar ikon riƙe ruwa kuma yana da tasiri mai mahimmanci akan aikin sabon turmi. Duk da haka, nazarin gwaji ya gano cewa danko na ether cellulose ba shi da wani tasiri a kan ciminti hydration kinetics. Nauyin kwayoyin halitta yana da ɗan tasiri akan hydration, kuma matsakaicin bambanci tsakanin ma'aunin kwayoyin daban-daban shine kawai 10min. Saboda haka, nauyin kwayoyin ba shine mahimmin ma'auni don sarrafa ruwan siminti ba.
"Aikace-aikacen ether na Cellulose a cikin Samfuran Busassun Haɗaɗɗen Tumi" ya nuna cewa jinkirin ether cellulose ya dogara da tsarin sinadarai. Kuma gabaɗayan yanayin da aka kammala shine cewa ga MHEC, mafi girman matakin methylation, ƙaramar tasirin ether na cellulose. Bugu da ƙari, sakamakon jinkirta maye gurbin hydrophilic (kamar maye gurbin zuwa HEC) ya fi karfi fiye da na maye gurbin hydrophobic (kamar maye gurbin zuwa MH, MHEC, MHPC). Sakamakon retarding na ether cellulose ya fi shafar sigogi biyu, nau'i da adadin ƙungiyoyi masu maye gurbin.
Gwaje-gwajen tsarin kuma sun gano cewa abubuwan da ke maye gurbin suna taka muhimmiyar rawa a cikin ƙarfin injina na adhesives na tayal. Don HPMC, ana buƙatar wani takamaiman matakin samarwa don tabbatar da narkewar ruwa da watsa haske. Abubuwan da ke cikin maye kuma yana ƙayyade ƙarfin HPMC. Hakanan zafin gel ɗin yana ƙayyade yanayin amfani na HPMC. A cikin wani takamaiman kewayon, haɓakar abun ciki na ƙungiyoyin methoxyl zai haifar da yanayin ƙasa a cikin ƙarfin cirewa, yayin da haɓaka abun ciki na ƙungiyoyin hydroxypropoxyl zai haifar da raguwar ƙarfin cirewa. tasowa Trend. Akwai irin wannan tasirin don lokutan buɗewa.
Canjin canjin ƙarfin injina a ƙarƙashin yanayin buɗe lokaci ya yi daidai da wancan ƙarƙashin yanayin yanayin zafi na al'ada. HPMC tare da babban methoxyl (DS) abun ciki da ƙananan hydroxypropoxyl (MS) abun ciki yana da kyau taurin fim, amma zai shafi rigar turmi akasin haka. kayan wetting Properties.
Lokacin aikawa: Dec-12-2022