Zida zopangira simenti zimagwiritsidwa ntchito kwambiri pomanga, misewu, milatho, tunnel ndi ntchito zina. Chifukwa cha kuchuluka kwa zida zopangira, zotsika mtengo komanso zomangamanga zosavuta, zakhala zida zomangira zofunika. Komabe, zida zopangira simenti zimakumananso ndi zovuta zina pakugwiritsa ntchito, monga kutsika kwamphamvu kwa ming'alu, kusagwira bwino kwa madzi ndi zofunika kwambiri pakutha kwa phala la simenti pakumanga. Pofuna kuthana ndi mavutowa, ofufuza akhala akuyesera kuphatikizira zinthu zosiyanasiyana za polima muzinthu zopangidwa ndi simenti kuti ziwongolere ntchito zawo.Hydroxypropyl methylcellulose (HPMC), monga zinthu zomwe zimagwiritsidwa ntchito polima zosungunuka m'madzi, zakhala zikugwiritsidwa ntchito kwambiri pokonza zinthu zosiyanasiyana za zipangizo za simenti chifukwa cha makhalidwe ake abwino a rheological, thickening effect, kusunga madzi ndi kukana madzi.
1. Zinthu zoyambira za hydroxypropyl methylcellulose
KimaCell®Hydroxypropyl methylcellulose ndi polima pawiri yomwe imapezeka posintha ma cellulose achilengedwe, ndikusungunuka kwamadzi bwino, kukhuthala, kusunga madzi komanso kukhazikika kwakukulu. Ikhoza kusintha maonekedwe a viscosity, fluidity ndi anti-sectionation ya zipangizo zopangira simenti, komanso imakhala ndi mpweya wokwanira, wotsutsa-kuipitsa ndi anti-kukalamba katundu. HPMC imagwiritsidwa ntchito kwambiri popanga zida zomangira monga matope, zida za simenti, matope owuma, ndi zokutira, ndipo imagwira ntchito yofunika kwambiri posintha mawonekedwe azinthu zopangira simenti.
2. Kupititsa patsogolo mawonekedwe a rheological azinthu zopangira simenti ndi hydroxypropyl methylcellulose
Ma rheological azinthu zopangidwa ndi simenti ndizofunikira kwambiri pakumanga, makamaka pakupopera, kumanga, ndi zokutira pamwamba. Makhalidwe abwino a rheological amatha kupititsa patsogolo ntchito yomanga ndikuwonetsetsa kuti zomangamanga zili bwino. Kuphatikizika kwa HPMC kumatha kusintha bwino madzi azinthu zozikidwa pa simenti. Makamaka, HPMC imawonjezera kukhuthala kwa phala la simenti, kupangitsa kusakaniza kukhala kokhazikika komanso kuchepetsa kupezeka kwa tsankho. Pansi pa chiŵerengero cha madzi-simenti otsika, HPMC akhoza bwino kusintha workability konkire ndi matope, kuwapanga kukhala fluidity bwino, komanso kuchepetsa evaporation mlingo wa zinthu ndi kutalikitsa nthawi yomanga.
3. Kupititsa patsogolo kukana kwa ming'alu ya zida za simenti ndi HPMC
Zida zopangira simenti zimatha kung'ambika panthawi yowumitsidwa, makamaka chifukwa cha zinthu monga kuyanika kuchepa, kusintha kwa kutentha, ndi katundu wakunja. Kuphatikiza kwa HPMC kumatha kupititsa patsogolo kukana kwa ming'alu ya zida zopangira simenti. Izi makamaka chifukwa chabwino madzi posungira ndi thickening zotsatira za HPMC. HPMC ikawonjezeredwa kuzinthu zopangira simenti, imatha kuchepetsa kutuluka kwamadzi ndikuchepetsa kuthamanga kwa phala la simenti, potero kuchepetsa ming'alu ya shrinkage yomwe imabwera chifukwa cha kusungunuka kwamadzi. Kuphatikiza apo, HPMC imathanso kukonza mawonekedwe amkati mwazinthu zopangira simenti, kukulitsa kulimba kwawo komanso kukana ming'alu.
4. Kupititsa patsogolo kukana kwa madzi ndi kulimba kwa zipangizo zopangira simenti
Kukana kwa madzi ndi kulimba kwa zinthu zopangidwa ndi simenti ndi chimodzi mwa zizindikiro zofunika kwambiri pa ntchito yomanga. Monga ma polima apamwamba kwambiri, HPMC imatha kusintha kukana kwamadzi pazinthu zopangira simenti. HPMC mamolekyu ndi amphamvu hydrophilicity ndipo akhoza kupanga khola hydration wosanjikiza mu phala simenti kuchepetsa madzi kulowa. Nthawi yomweyo, KimaCell®HPMC imathanso kupititsa patsogolo kapangidwe kazinthu zopangira simenti, kuchepetsa porosity, motero kumapangitsa kuti zinthuzo zisamapitirire komanso kukana madzi. M'malo ena apadera, monga malo a chinyezi kapena kukhudzana ndi madzi kwa nthawi yayitali, kugwiritsa ntchito HPMC kumatha kupititsa patsogolo kulimba kwa zinthu zopangidwa ndi simenti.
5. HPMC thickening zotsatira pa zipangizo simenti
Kukula kwa HPMC pazida zopangira simenti ndi chimodzi mwazinthu zofunika kwambiri pakugwiritsira ntchito kwake. Mu simenti phala, HPMC akhoza kupanga atatu azithunzithunzi maukonde dongosolo mwa kusintha kwa maselo ake, potero kwambiri kuonjezera mamasukidwe akayendedwe a phala. Izi thickening zotsatira sizingangopangitsa kuti zipangizo zopangira simenti zikhale zokhazikika panthawi yomanga ndikupewa kugawanitsa phala la simenti, komanso kumapangitsanso kuti phala la phala likhale losalala komanso kusalala kwa malo omanga pamlingo wina. Kwa matope ndi zida zina zopangira simenti, kukhuthala kwa HPMC kumatha kupititsa patsogolo magwiridwe antchito ndikusintha kwazinthuzo.
6. HPMC imapangitsa kuti zipangizo zopangira simenti zikhale bwino
Zotsatira zonse zaMtengo wa HPMCmuzinthu zopangira simenti, makamaka mphamvu ya synergistic mu fluidity, kukana ming'alu, kusunga madzi ndi kukana madzi, kungathe kusintha kwambiri ntchito yonse ya zipangizo zopangira simenti. Mwachitsanzo, HPMC imatha kuwonetsetsa kuti zinthu zopangidwa ndi simenti zimakhala zamadzimadzi pomwe zimakulitsa kukana kwawo ming'alu ndi kukana madzi pamalo owumitsidwa pambuyo pomanga. Kwa mitundu yosiyanasiyana ya zida zopangira simenti, kuwonjezera kwa HPMC kumatha kusintha magwiridwe awo momwe angafunikire kuti akwaniritse bwino ntchito komanso kukhazikika kwanthawi yayitali kwazinthu zopangira simenti.
Hydroxypropyl methylcellulose (HPMC), monga polima yosungunuka m'madzi, imatha kusintha kwambiri zinthu zambiri za simenti, makamaka mu rheology, kukana ming'alu, kukana madzi ndi kukhuthala. Kuchita bwino kwake kumapangitsa HPMC kugwiritsidwa ntchito kwambiri pantchito zomangira, makamaka zida zopangira simenti. M'tsogolomu, ndi kuwongolera kosalekeza kwa zofunikira zogwirira ntchito za simenti, mphamvu yogwiritsira ntchito KimaCell®HPMC ndi zotuluka zake ziyenera kufufuzidwabe ndi kupangidwa.
Nthawi yotumiza: Jan-27-2025