Methyl Hydroxyethyl Cellulose (MHEC), ether yodziwika bwino ya cellulose mu zipangizo zomangira, imagwiritsidwa ntchito kwambiri mu mortars wosakaniza ndi madzi, zomatira za matailosi, ufa wa putty, ndi mortars wotenthetsera kutentha chifukwa cha kukhuthala kwake, kusunga madzi, komanso mphamvu zake zogwirira ntchito. Mainjiniya ambiri akuda nkhawa ndi funso lofunika kwambiri akamagwiritsa ntchito MHEC: Kodi mlingo woyenera wa MHEC mu mortars wa simenti ndi wotani?
1. Mlingo Woyenera wa MHEC mu Simenti
Kawirikawiri, kuchuluka kwa MHEC komwe kumawonjezeredwa ku simenti kumakhala kochepa, komabe kumatha kusintha kwambiri magwiridwe antchito a simenti. Kutengera ndi zomwe zachitika mumakampani ndi deta yaukadaulo, mlingo woyenera nthawi zambiri ndi:
Simenti wamba: pafupifupi 0.2‰–0.6‰ (monga, magalamu 200–600 pa tani imodzi ya ufa wouma).
Kupaka pulasitala ndi matope omangira: nthawi zambiri amakhala mkati mwa 0.3‰–0.5‰.
Chomangira choteteza kutentha kapena chomangira chapadera: Mlingo wokwera pang'ono, pafupifupi 0.4‰–0.7‰, ungafunike. Chomangira cha matailosi kapena chomangira chogwira ntchito bwino: Mlingo ukhoza kuwonjezeka kufika pafupifupi 0.6‰–1.0‰ ngati pakufunika, koma nthawi zambiri sichidutsa 1%.
Tiyenera kudziwa kuti mlingo wa MHEC womwe ukulangizidwa si mtengo wokhazikika ndipo umakhudzidwa ndi zinthu monga kapangidwe ka matope, mtundu wa simenti, kusalala kwa zodzaza, kutentha kwa malo ozungulira ndi chinyezi. Chifukwa chake, popanga zenizeni, mlingo woyenera nthawi zambiri umatsimikiziridwa kudzera mu mayeso oyeserera.
2. Zinthu Zomwe Zimakhudza Mlingo Woyenera Kumwa
2.1. Mtundu wa Simenti ndi Mlingo wake
Kagwiridwe ka ntchito ndi kusalala kwa simenti, komanso kuchuluka kwa zinthu zosakaniza (monga phulusa la ntchentche ndi ufa wa mchere), zonse zimakhudza mlingo woyenera wa MHEC. Ma mortar omwe ali ndi ntchito zambiri komanso madzi ambiri nthawi zambiri amafunikira cellulose ether yambiri kuti asunge madzi.
2.2. Kapangidwe ka Mchenga ndi Zodzaza
Kufalikira kwa tinthu ta mchenga ndi kusalala kwake zimakhudza kwambiri kufunikira kwa madzi. Mchenga wochepa kapena matope okhala ndi zodzaza zopepuka nthawi zambiri amafunika kuchuluka kwa MHEC kuti asunge kusinthasintha koyenera komanso kugwira ntchito bwino.
2.3. Malo Omanga
Mu malo otentha kwambiri, chinyezi chochepa, kapena mphepo yamphamvu, chinyezi cha matope chimasanduka nthunzi mwachangu, zomwe zimapangitsa kuti pakhale kuchuluka kwa MHEC kuti madzi asungidwe bwino komanso kuti nthawi yotseguka ipitirire.
2.4. Kugwira Ntchito Mwachindunji
Ngati kusunga madzi ndi kukana kutsika ndikofunikira, mlingo ukhoza kuwonjezeredwa pang'ono.
Ngati vuto lalikulu ndi kugwira ntchito bwino, mlingo wochepa udzakhala wokwanira.
Pa ntchito zopyapyala (monga zomatira za matailosi), kuonjezera mlingo wa MHEC moyenera n'kofunika kwambiri.
3. Zotsatira za MHEC mu Mortar
Kuwonjezera MHEC mwanzeru kungawongolere kwambiri makhalidwe a matope, kuphatikizapo:
3.1. Kusunga Madzi Bwino
Cellulose ether imapanga yankho lofanana, lokhuthala mu matope, lomwe limatseka bwino chinyezi ndikuletsa madzi osakwanira a simenti, motero limawonjezera mphamvu.
3.2. Kugwira Ntchito Bwino ndi Kugwira Ntchito Bwino
Mtondowo umakhala wosalala komanso wosalala, zomwe zimapangitsa kuti zikhale zosavuta kufalitsa, kugwiritsa ntchito, komanso kufinya panthawi yomanga, zomwe zimachepetsa kutuluka kwa magazi ndi kulekanitsa.
3.3. Kulimba Kwambiri ndi Kukana Kugwa
Pakumanga moyimirira, matope sagwa kwambiri ndipo amapanga mgwirizano wabwino ndi substrate, masonry, kapena insulation board pamwamba.
3.4. Nthawi Yotsegulira Yowonjezera
MHEC imachepetsa kuchuluka kwa madzi omwe amatuluka mu matope, zomwe zimathandiza ogwira ntchito yomanga kuti azitha kusintha ndikuwongolera magwiridwe antchito omanga.
3.5. Kugwira Ntchito Kwabwino Kwambiri kwa Mortar
Izi zikuphatikizapo kukana ming'alu, kulimba, ndi ubwino wa pamwamba, kuonetsetsa kuti matopewo ali ndi mphamvu komanso kukhazikika bwino akauma.
4. Malangizo Ogwiritsira Ntchito
Yesani Musanawonjezere Mlingo: Chifukwa cha mitundu yosiyanasiyana ya mankhwala, tikukulimbikitsani kuchita mayeso a labotale kuti mudziwe mlingo woyenera.
Pewani Kugwiritsa Ntchito Mopitirira Muyeso: Kuwonjezera MHEC mopitirira muyeso kungayambitse kuti chomangiracho chikhale chokhuthala kwambiri, zomwe zimapangitsa kuti chikhale chovuta kugwiritsa ntchito komanso kukhudza mphamvu.
Onetsetsani Kuti Zafalikira Mofanana: Mukasakaniza mouma, onetsetsani kuti MHEC yasakanizidwa bwino ndi mchenga ndi simenti kuti isamamatire.
Mlingo woyenera wa MHECMu matope a simenti nthawi zambiri amakhala pakati pa 0.2 ndi 0.6, ndipo matope apadera amalola kuwonjezeka koyenera kufika pa 0.7 mpaka 1.0. Mlingo wake uyenera kukonzedwa bwino kutengera mtundu wa matope, zinthu zopangira, ndi malo omangira. Kugwiritsa ntchito bwino MHEC sikuti kumangowonjezera kusunga madzi a matope, kugwira ntchito bwino, komanso magwiridwe antchito a matope, komanso kumawonjezera kwambiri mphamvu ndi kulimba kwa mgwirizano. Ndi chinthu chofunikira kwambiri popanga matope amakono omangira.
Nthawi yotumizira: Ogasiti-20-2025