Cellulose ether kupita ku matope a gypsum

Ma cellulose onse a carboxymethyl ndi methyl cellulose atha kugwiritsidwa ntchito ngati zosunga madzi popaka pulasitala, koma mphamvu yosunga madzi ya carboxymethyl cellulose ndiyotsika kwambiri kuposa ya methyl cellulose, ndipo carboxymethyl cellulose imakhala ndi mchere wa sodium, kotero siwoyenera pulasitala. paris. Ali ndi retarding zotsatira ndipo amachepetsa mphamvu ya pulasitala wa Paris. Methyl cellulose ndi njira yabwino yophatikizira zida za gypsum cementitious zomwe zimaphatikizira kusungirako madzi, kukhuthala, kulimbitsa, ndi viscosifying, kupatula kuti mitundu ina imachedwetsa mlingo ukakhala waukulu. apamwamba kuposa carboxymethyl cellulose. Pachifukwa ichi, zida zambiri za gypsum composite gelling zimagwiritsa ntchito njira yophatikizira carboxymethyl cellulose ndi methyl cellulose, zomwe sizimangogwiritsa ntchito mawonekedwe awo (monga kuchepa kwa carboxymethyl cellulose, kulimbikitsa mphamvu ya methyl cellulose), ndikugwiritsa ntchito maubwino awo onse. (monga kusunga kwawo madzi ndi kukhuthala). Mwanjira imeneyi, ntchito yosungira madzi ya gypsum cementitious material komanso ntchito yonse ya gypsum cementitious material ikhoza kukonzedwa, pamene kuwonjezeka kwa mtengo kumasungidwa pamalo otsika kwambiri.

Kodi kukhuthala kwa methyl cellulose ether ndi kofunika bwanji pa matope a gypsum?

Viscosity ndi gawo lofunikira lamethyl cellulose etherntchito.

Nthawi zambiri, kukhathamira kwamphamvu kumapangitsa kuti matope a gypsum asungidwe bwino. Komabe, kukwezeka kwamphamvu kwamphamvu, kuchuluka kwa molekyulu ya methyl cellulose ether, komanso kutsika kofananirako kusungunuka kwake kudzakhala ndi zotsatira zoyipa pa mphamvu ndi kapangidwe ka matope. The apamwamba mamasukidwe akayendedwe, ndi zoonekeratu kwambiri thickening zotsatira pa matope, koma si mwachindunji molingana. Kukwezeka kwa viscosity, m'pamenenso matope onyowa amawonekera kwambiri. Pakumanga, zimawonetsedwa ngati kumamatira ku scraper ndi kumamatira kwakukulu ku gawo lapansi. Koma sizothandiza kuwonjezera mphamvu zamapangidwe a dothi lonyowa palokha. Kuonjezera apo, panthawi yomanga, ntchito yotsutsa-sag ya matope onyowa sizowoneka bwino. M'malo mwake, ma viscosity ena apakati komanso otsika koma osinthidwa a methyl cellulose ethers ali ndi ntchito yabwino kwambiri pakuwongolera mphamvu zamapangidwe amatope onyowa.

Kodi ubwino wa cellulose ether ndi wofunika bwanji kumatope?

Fineness ndiwonso index yofunikira ya methyl cellulose ether. The MC ntchito youma ufa matope chofunika kukhala ufa ndi otsika madzi okhutira, ndi fineness amafunanso 20% kuti 60% ya tinthu kukula kukhala zosakwana 63m. Ubwino wake umakhudza kusungunuka kwa methyl cellulose ether. Coarse MC nthawi zambiri granular, amene mosavuta kumwazikana ndi kupasuka m'madzi popanda agglomeration, koma mlingo kuvunda ndi wodekha kwambiri, kotero si oyenera ntchito youma ufa matope. Zogulitsa zina zapakhomo ndi flocculent, zosavuta kumwazikana ndi kupasuka m'madzi, ndi zosavuta agglomerate . Mumatope owuma a ufa, MC imamwazikana pakati pa zophatikizira, zodzaza bwino ndi simenti ndi zida zina zomangira. Ufa wokwanira wokwanira ungapewe methyl cellulose ether agglomeration mukasakaniza ndi madzi. Pamene MC ikuwonjezeredwa ndi madzi kuti asungunuke ma agglomerates, zimakhala zovuta kwambiri kumwazikana ndi kupasuka. Coarse MC singowononga, komanso imachepetsa mphamvu ya m'deralo ya matope. Pamene matope owuma owuma akugwiritsidwa ntchito m'dera lalikulu, kuthamanga kwa machiritso a matope am'deralo kudzachepetsedwa kwambiri, ndipo ming'alu idzawoneka chifukwa cha nthawi zosiyanasiyana zochiritsira. Kwa matope opopera omwe amapangidwa ndi makina, kufunikira kwa fineness ndipamwamba chifukwa cha nthawi yochepa yosakaniza.

Ubwino wa MC umakhalanso ndi vuto linalake pakusunga madzi. Nthawi zambiri, ma etha a methyl cellulose okhala ndi kukhuthala kofanana koma fineness yosiyana, pansi pa kuchuluka komweko, kuwongolera bwino kumapangitsa kuti madzi asungidwe bwino.