Yaya mahimmancin danko na methyl cellulose ether don turmi gypsum?

Yaya mahimmancin danko na methyl cellulose ether don turmi gypsum?

Amsa: Danko shine muhimmin ma'auni don aikin methyl cellulose ether.

Gabaɗaya magana, mafi girman danko, mafi kyawun tasirin riƙe ruwa na turmi gypsum. Duk da haka, mafi girma da danko, mafi girman nauyin kwayoyin halitta na methyl cellulose ether, da kuma raguwa mai dacewa a cikin solubility zai yi mummunan tasiri akan ƙarfin da aikin ginin turmi. Mafi girma da danko, mafi bayyananne tasirin thickening akan turmi, amma ba daidai ba ne kai tsaye. Mafi girman danko, da ƙarin danko turmi zai kasance. A lokacin ginawa, an nuna shi a matsayin mai mannewa ga scraper da high adhesion zuwa substrate. Amma ba taimako ba ne don ƙara ƙarfin tsarin jika da kanta. Bugu da ƙari, a lokacin ginawa, aikin anti-sag na turmi rigar ba a bayyane yake ba. Akasin haka, wasu matsakaici da ƙananan danko amma gyare-gyaren ethers na methyl cellulose suna da kyakkyawan aiki wajen inganta ƙarfin tsarin jika.

Yaya mahimmancin fineness na cellulose ether zuwa turmi?

Amsa: Lalacewar kuma muhimmin ma'anar aiki ne na methyl cellulose ether. Ana buƙatar MC da aka yi amfani da shi don busassun busassun turmi don zama foda tare da ƙananan abun ciki na ruwa, kuma fineness kuma yana buƙatar 20% zuwa 60% na girman barbashi ya zama ƙasa da 63m. Rashin lafiya yana rinjayar solubility na methyl cellulose ether. Coarse MC yawanci granular ne, wanda ke da sauƙin tarwatsawa da narke cikin ruwa ba tare da haɓaka ba, amma yawan narkewa yana da jinkirin gaske, don haka bai dace da amfani da busassun busassun turmi ba. Wasu samfuran cikin gida suna flocculent, ba sauƙin tarwatsawa da narkewa cikin ruwa ba, kuma suna da sauƙin haɓakawa. A cikin busassun busassun turmi, MC yana tarwatse a tsakanin kayan siminti kamar tara, filler mai kyau da siminti, kuma isasshen foda kawai zai iya guje wa methyl cellulose ether agglomeration lokacin haɗuwa da ruwa. Lokacin da aka ƙara MC da ruwa don narkar da agglomerates, yana da wuyar tarwatsawa da narkewa. M MC ba kawai ɓatacce ba ne, amma kuma yana rage ƙarfin gida na turmi. Lokacin da aka shafa irin wannan busasshen turmi a cikin wani babban yanki, saurin warkar da turmi na gida zai ragu sosai, kuma za a sami tsagewa saboda lokutan warkewa daban-daban. Don turmi da aka fesa tare da aikin injiniya, abin da ake buƙata don fineness ya fi girma saboda ɗan gajeren lokacin haɗuwa.

Har ila yau, tarar MC yana da wani tasiri a kan riƙewar ruwa. Gabaɗaya magana, ga methyl cellulose ethers tare da danko iri ɗaya amma lafiya daban-daban, a ƙarƙashin adadin ƙari iri ɗaya, mafi kyawun mafi kyawun mafi kyawun tasirin riƙewar ruwa.

Menene hanyar zaɓin cellulose?

Amsa: Adadin ether cellulose da aka yi amfani da shi a aikace-aikace daban-daban ya dogara ne akan buƙatar riƙe ruwa. Ya dace da kowane irin turmi. Abubuwan da ake sha da yawa suna buƙatar ƙarin adadin ether cellulose. Turmi tare da nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in) rarrabuwa shine mafi girman yanki kuma yana buƙatar mafi girman adadin ether na cellulose.

Ana iya zaɓar ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun buƙatun hana sagging. Idan gyare-gyaren bai isa ba, ana iya ƙara sitaci ethers, yawanci hydroxypropyl sitaci ethers, don hana sags.

Jimlar adadin da girman barbashi na filler a cikin tsari dole ne a zaba don samar da santsi da daidaito mai kyau.

Haɗa gypsum, filler, nau'in da adadin ether cellulose da kuma yadda ake amfani da sitaci ether ya kamata a haɗa su tare da waɗannan hanyoyin:

Lokacin da aka hada turmi mai bushewa a cikin wani adadin ruwa, adadin da aka ƙara yana dogara ne akan adadin ruwa, kuma duk ruwan ana jika shi ba tare da motsa busassun foda ba tare da daidaitaccen ruwa-to-paste. Idan an haɗa nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan daidaitattun daidaitattun, to zamu iya samun turmi mai santsi tare da abubuwan aikace-aikacen da suka dace bayan haɗuwa.

Menene gyare-gyaren gina gypsum ta hanyar mai riƙe ruwa?

Amsa: Kayayyakin bangon gine-gine galibinsu ne masu rarrafe, kuma dukkansu suna da karfin shayar da ruwa. Duk da haka, ana shirya kayan gini na gypsum da ake amfani da shi don gina bango ta hanyar ƙara ruwa a bango, kuma ruwa yana da sauƙi ta hanyar bangon, wanda ya haifar da rashin ruwa da ake bukata don hydration na gypsum, yana haifar da matsala wajen gina ginin da kuma raguwa. Ƙarfin haɗin gwiwa, yana haifar da ɓarna, Matsalolin inganci irin su hollowing da peeling. Inganta riƙewar ruwa na kayan gini na gypsum zai iya inganta ingancin ginin da haɗin gwiwa tare da bango. Sabili da haka, wakili mai riƙe ruwa ya zama ɗaya daga cikin mahimman abubuwan haɗin ginin gypsum.

Abubuwan da aka saba amfani da su na riƙe ruwa a ƙasata sune carboxymethyl cellulose da methyl cellulose. Wadannan abubuwa biyu masu riƙe ruwa sune abubuwan da aka samo na ether na cellulose. Dukansu suna da aiki na sama, kuma akwai ƙungiyoyin hydrophilic da hydrophobic a cikin ƙwayoyin su, waɗanda ke da emulsification, colloid mai kariya da kwanciyar hankali lokaci. Saboda yawan dankowar maganin ruwa mai ruwa, lokacin da aka kara shi a turmi don kiyaye yawan ruwa mai yawa, yana iya hana wuce gona da iri na ruwa ta hanyar substrate (kamar tubali, siminti, da sauransu) kuma ya rage yawan fitar da ruwa. na ruwa, ta haka yana taka rawa ga tasirin riƙe ruwa. Methyl cellulose shine madaidaicin admixture don gypsum wanda ke haɗawa da riƙe ruwa, yin kauri, ƙarfafawa da kauri, amma farashin yana da girma. Yawancin lokaci, wakili guda ɗaya mai kula da ruwa ba zai iya cimma sakamako mai kyau ba, kuma haɗuwa da nau'o'in nau'in ruwa daban-daban ba zai iya inganta tasirin amfani kawai ba, amma kuma rage farashin kayan gypsum.

Ta yaya riƙewar ruwa ke shafar kaddarorin gypsum composite na siminti?

Amsa: Adadin riƙewar ruwa yana ƙaruwa tare da ƙari na methyl cellulose ether a cikin kewayon 0.05% zuwa 0.4%. Lokacin da ƙarin adadin ya ƙara ƙaruwa, yanayin ƙara riƙe ruwa ya ragu.