Hydroxypropyl methylcellulose (hpmc) Ndi gawo lachilengedwe lomwe limagwiritsidwa ntchito kwambiri pomanga, mankhwala, chakudya ndi minda ina. Mu simenti makampani, wodwala nthawi zambiri amagwiritsidwa ntchito ngati zowonjezera kuti musinthe luso la simenti, ndikuwonjezera njira, kusinthika kovuta kwa simenti.
1. Makhalidwe oyambira ndi makina a machitidwe a hpmc
HPMC ndi mankhwala opangidwa ndi kusinthana kwa cellose, hydroxypropropropslaty ndi methylation. Kupanga kwake kwa maselo kumaphatikizapo magulu a hydrophilic angapo ndi hydrophobic magulu a hydrophobic, omwe amathandizira kusewera maudindo angapo m'mitundu ya simenti. HPMC imasewera maudindo otsatirawa mu simenti:
Kukula
HPMC ili ndi mphamvu yolimba ndipo imatha kusintha mafayilo a simenti, ndikupanga simenti. Izi ndizofunikira kwambiri kuti zithetse madzi ndi kukhazikika kwa phala la simenti, makamaka ku konkriti yayitali kapena zina zolimbikitsira, kuonetsetsa kuti imadzaza nkhungu yabwinoko ndipo imakhala ndi kachulukidwe kwambiri.
Sinthani kusungidwa kwamadzi
HPMC imatha kuwongolera bwino madzi osinthika mu simenti ndikuchedwetsa nthawi yoyambira simenti. Makamaka kutentha kwakukulu kapena malo owuma, kumatha kupitiriza kunyowa kwa simenti ndikupewa kuyanika kwa nthawi yayitali, potero ndikuwongolera magwiridwe antchito. Kusungidwa kwamadzi ndi chinthu chofunikira kwambiri pantchito yomanga ya simenti ndipo amatha kupewa kukhazikitsidwa kwa ming'alu.
Sinthani zotsatsa ndi kuwonjezera madzi
Zowonjezera zina zamankhwala nthawi zambiri zimawonjezeredwa ndi simenti timenti, monga ma polima, ma andirection a mchere, etc., zomwe zingakhudze madzi a phala. HPMC imatha kukulitsa mphamvu ya simenti, ndikupangitsa kuti malowedwe apulasitiki ambiri ndi madzi, potero amakula bwino ntchito yomanga. Kuphatikiza apo, HPMC imatha kukulitsa mgwirizano pakati pa simenti ndi zina zomanga (monga mchenga ndi miyala) ndikuchepetsa kupezeka kwa tsankho.
Sinthani kukana
Popeza kudandaula kumatha kusintha madzi osungira kwa simenti ndikuchedwetsa kugwiritsa ntchito mankhwalawa, kumatha kusinthanso kufooka kwa zinthu za simenti. Makamaka kumayambiriro pamene mphamvu ya simenti sinakwaniritse bwino, simenti imakonda ming'alu. Pogwiritsa ntchito HPMC, kuchuluka kwa simenti kumatha kuchepetsedwa komanso mawonekedwe osokoneza bongo omwe amayambitsidwa ndi kuchepa kwa madzi mwachangu kumatha kuchepetsedwa.
2. Zotsatira za HPMC mu simenti kugwiritsa ntchito
Sinthani Kugwiritsa Ntchito Mayeso
Zotsatira zakumapeto kwa hpmc zimapangitsa kuti simenti ikhale yolimba kwambiri. Kwa mitundu yosiyanasiyana ya simenti (monga simenti wamba, simenti yowuma msanga, etc.), hpmc imatha kukonza madzi osalala ndikuwongolera ndikukuwuzani ndikupanga pomanga. Kuphatikiza apo, hpmc imatha kupanga simenti yokhazikika pomanga, kuchepetsa kupindika, ndikusintha mtundu wonse.
Sinthani mphamvu ya simenti
Kuphatikiza kwa HPMC kumatha kusintha mphamvu ya simenti kwina. Zimasintha kugawa kwamadzi mu simenti, kumalimbikitsa kugwiritsa ntchito yunifolomu pogwiritsa ntchito tinthu tating'onoting'ono, ndipo kumawonjezera mphamvu yomaliza ya simenti. Pamapulogalamu othandiza, owonjezera kuchuluka kwa HPMC yoyenera kumatha kulimbikitsa njira yoyamba ya simenti ndikusintha mphamvu, yosasinthika sing'anga.
Kukhazikika Kwabwino
Kuphatikiza kwa HPMC kumathandizira kukonza simenti. Makamaka simenti ikawonetsedwa madera owononga (monga acid, alkali, a saline, ndi zina, hpmc amatha kuwonjezera mphamvu ya mankhwala ndi kukana kwa simenti ya simenti. Kuphatikiza apo, HPMC imatha kuchepetsa chipani chosakanizika cha simenti ndikuwonjezera kuchuluka kwa simenti, potero kuchepetsa kuwonongeka kwake m'malo mwazinthu zovuta.
Sinthani kusintha kwa zinthu zachilengedwe
Panthawi yovuta kwambiri, magwiridwe antchito a simenti nthawi zambiri amakhudzidwa ndi kusintha kwa kutentha ndi chinyezi. HPMC imatha kuchedwetsa nthawi yanthawi ya simenti slorry ndikuchepetsa mavuto omwe amayamba kuyanika kapena kuwuma kwambiri. Chifukwa chake, makamaka malo okhala omanga okhala ndi kutentha kwambiri, kutentha kochepa komanso kusintha kwa chinyezi chachikulu.
3. Kugwiritsa ntchito bwino kwa HPMC
Ngakhale kugwiritsa ntchito HPMC mu simenti ikhoza kusintha kwambiri momwe amagwirira ntchito, kugwiritsa ntchito kumayenera kukhala osamala, makamaka kuchuluka komweko. Kupatula kwambiri kwa HPMC kungapangitse mafayilo a simenti kuti akhale okwera kwambiri, omwe amapangitsa kusakanikirana kosakanikirana kapena kusakanikirana. Nthawi zambiri, kuchuluka kwa HPMC yowonjezeredwa iyenera kulamulidwa pakati pa 0,1% ndi 0,5% ya simenti, ndi mtengo wakeyo ayenera kusinthidwa malinga ndi mtundu wake wa simenti, kugwiritsa ntchito ndi malo omanga.
Magwero osiyanasiyana, zolemba ndi madigiri osinthira aHpmc atha kukhalanso ndi zotsatira zosiyanasiyana pa simenti katundu. Chifukwa chake, posankha hpmc, zinthu monga ma celecular kulemera, hydroxypropyl, digiri ya methylation iyenera kuganiziridwa bwino kuti ipeze njira yabwino kwambiri. Zotsatira.
Monga njira yofunika ya simenti, yolimbitsa thupi imasintha kwambiri kugwiritsidwa ntchito, mphamvu, kukhazikika komanso kusinthasintha kwa simenti, kulimbikitsa zotsatsa ndi kukana kotsatsa. Kugwiritsa ntchito kwake kwapa simenti sikungothandizanso kugwirira ntchito simenti, komanso kumathandizira kwambiri kafukufukuyu ndi chitukuko cha zinthu zatsopano za simenti monga konkriti zolimbitsa thupi. Monga momwe ntchito zomanga zikupitilirabe zomwe akufuna kuchita zathupi, hpmc ali ndi chiyembekezo chothandiza pantchito ya simenti ndipo ipitilizabe kusinthidwa kosinthika kwa simenti.
Post Nthawi: Jan-16-2025