Hydroxypropyl methylcellulose (HPMC) ndi chofunikira chowonjezera chamankhwala chomwe chimagwiritsidwa ntchito kwambiri pomanga ndi zomangamanga, makamaka mu konkire ndi matope. HPMC ndi madzi osungunuka omwe si a ionic cellulose ether osinthidwa ndi zinthu zachilengedwe za polima (monga zamkati kapena thonje).
1. Zothina ndi zosunga madzi
Udindo waukulu wa HPMC mu konkire ndi ngati thickening wothandizira ndi madzi posungira. Pambuyo powonjezera HPMC ku gawo la konkire, kusinthasintha ndi kukhuthala kwa konkire kumatha kusintha kwambiri. Khalidweli limathandizira HPMC kuwongolera bwino ntchito ya konkriti ndikuchepetsa kuyenda ndi kulekanitsa matope panthawi yomanga. Kuphatikiza apo, kusungidwa kwamadzi kwa HPMC kumapangitsa kuti zikhale zovuta kuti madzi a konkire asungunuke mwachangu, potero amatalikitsa nthawi yoyambira konkriti. Izi ndizofunikira kwambiri pomanga pansi pa kutentha kwakukulu m'chilimwe, chifukwa zimalepheretsa konkire pamwamba kuti iume ndikuonetsetsa kuti simenti imakhala ndi madzi okwanira kuti apititse patsogolo mphamvu yomaliza ya konkire.
2. Kuchedwetsa nthawi coagulation
Kuyambitsidwa kwa HPMC kumatha kuchedwetsa nthawi yoyika konkire. Izi ndizofunikira makamaka pamikhalidwe yovuta yomanga, monga ntchito zazikulu zothira konkriti komwe konkriti imayenera kuyendetsedwa kwa nthawi yayitali. HPMC imalepheretsa kuthamanga kwa simenti ya hydration popanga filimu ya adsorption pamwamba pa tinthu tating'ono ta simenti, motero kumatalikitsa nthawi yoyika konkire. Izi zimapatsa ogwira ntchito yomanga nthawi yochulukirapo yosintha ndi kudula kuti atsimikizire mtundu wa zomangamanga.
3. Ntchito yolimbana ndi kusweka
Kung'amba konkire ndi vuto lodziwika bwino pomanga nyumba, ndipo HPMC imapambana pakuwongolera konkriti kuti isagwe. Kusungidwa kwa madzi ndi kukhuthala kwa HPMC kumachepetsa kutuluka kwa madzi panthawi yowumitsa konkire, kupewa kutsika ndi kusweka chifukwa cha kusalinganika kwa chinyezi. Kuphatikiza apo, HPMC imathanso kukulitsa zotanuka modulus ya konkire, kupangitsa konkire kukhala yolimba kwambiri popsinjika, potero kuchepetsa chiopsezo chosweka.
4. Kupititsa patsogolo kusalolera
Kusasunthika kwa konkriti ndikofunikira kwambiri pakulimba kwa nyumba. HPMC akhoza kwambiri kusintha impermeability konkire mwa ntchito yake kusunga madzi ndi kuwongolera pore dongosolo konkire. Kapangidwe ka maukonde opangidwa ndi HPMC mu konkire amatha kudzaza tinthu tating'onoting'ono mkati mwa konkire, potero kuchepetsa kulowa kwa chinyezi ndi zinthu zina zowononga. Izi ndizopindulitsa kwambiri pakuwongolera kukhazikika kwa zomanga za konkriti zomwe zimafuna kusasunthika kwambiri, monga zomanga zapansi panthaka ndi matanki osungira madzi.
5. Kupititsa patsogolo ntchito yomanga
Udindo wina wofunikira wa HPMC ndikuwongolera magwiridwe antchito a konkriti. Popeza HPMC kumawonjezera mamasukidwe akayendedwe ndi rheology konkire, ndi fluidity ndi adhesion wa konkire pa ntchito yomanga bwino kwambiri. Izi sizingochepetsa kutayika kwa zipangizo panthawi yomanga, komanso zimapangitsa kuti ntchito yomanga ikhale yolondola komanso yabwino. Mwachitsanzo, kuwonjezera HPMC ku shotcrete kumatha kuchepetsa kutayika kwa konkriti, kukulitsa makulidwe omanga, ndikupanga malo omangawo kukhala osalala komanso osalala.
6. Kupititsa patsogolo ntchito zotetezera kutentha
Mu mitundu ina ya konkire, HPMC imagwiritsidwanso ntchito kupititsa patsogolo kutentha kwa zinthuzo. Kukhazikitsidwa kwa HPMC kumatha kupanga tinthu tating'ono ting'onoting'ono mkati mwa konkire, zomwe zimathandizira kuchepetsa kutentha kwa konkriti ndikupangitsa kuti konkritiyo ikhale yabwino. Izi zimakhala ndi phindu lofunikira pamapangidwe ena apadera omangira monga kusungirako kuzizira, makoma otsekereza matenthedwe, ndi zina.
7. Chepetsani tsankho ndi kutaya magazi
Kusiyanitsa ndi kutuluka magazi ndizovuta zomwe zimachitika mu konkire, makamaka mu konkire yothamanga kwambiri. Powonjezera kusasinthika kwa konkire, HPMC imatha kuteteza kugawanika kwa konkriti ndikuchepetsa kuchuluka kwa magazi mu konkire. Izi sizimangowonjezera ubwino wa pamwamba pa konkire, komanso zimatsimikizira kuti zimakhala zofanana, potero zimawonjezera mphamvu zake komanso kukhazikika.
8. Limbikitsani kumamatira
Kwa konkriti ina yomwe imayenera kumangirizidwa kuzinthu zina, monga zomatira matailosi kapena matope okonza, HPMC imatha kukulitsa kwambiri kumamatira kwake. Mwa kuwonjezera mamasukidwe akayendedwe ndi kusinthasintha konkire, HPMC chimathandiza konkire bwino chomangira ndi wosanjikiza m'munsi kapena zipangizo zina ndi kupewa spalling ndi kugwa. Izi zimagwiritsidwa ntchito kwambiri pamakina otsekera pakhoma, kuyika matailosi ndi kukonza konkire.
Monga chowonjezera champhamvu chamankhwala, HPMC ili ndi zabwino zambiri zikagwiritsidwa ntchito mu konkriti. Sikuti amangowonjezera kugwira ntchito kwa konkire, kumawonjezera nthawi yogwira ntchito, kumawonjezera kukana kusweka ndi kusasunthika, komanso kumawonjezera kukhazikika komanso moyo wautumiki wa konkriti. Muzomangamanga zamakono, HPMC yakhala chinthu chofunikira komanso chofunikira. M'tsogolomu, ndikukula kosalekeza komanso luso laukadaulo womanga, mwayi wogwiritsa ntchito konkriti wa HPMC udzakhala wokulirapo, ndipo ikuyembekezeka kutenga gawo lalikulu pazomanga zatsopano ndi nyumba zobiriwira.
Nthawi yotumiza: Aug-16-2024