HPMC (hydroxypropyl methylcellulose)ndi cellulose yosinthidwa yomwe imagwiritsidwa ntchito kwambiri muzomangira, makamaka mumatope. Monga polima pawiri sungunuka madzi, HPMC osati kusintha ntchito yomanga matope, komanso kuchita mbali yofunika mu impermeability matope.
1. Basic katundu wa HPMC ndi udindo wake mu matope
HPMC ali wabwino kusungunuka madzi ndi thickening katundu. Ikhoza kuphatikiza ndi madzi kuti ikhale yankho la viscous kuti lipititse patsogolo ntchito yamatope. Maudindo akulu omwe HPMC adasewera mumatope ndi awa:
Kupititsa patsogolo kasungidwe ka madzi mumatope: HPMC imasunga madzi mwamphamvu ndipo imatha kuchepetsa kutuluka kwa madzi, potero imasunga matope. Izi zimathandiza kupititsa patsogolo ntchito yomanga matope, kuti zikhale zosavuta kugwira ntchito panthawi yomanga, komanso zimathandiza kuti simenti iwonongeke.
Kupititsa patsogolo kumamatira ndi matope a matope: HPMC imatha kupititsa patsogolo kumamatira kwamatope, kupititsa patsogolo kumamatira kwake pamunsi, ndikupewa kukhetsa kapena kusweka panthawi yomanga. Pa nthawi yomweyo, HPMC akhoza kusintha plasticity matope, kuti zikhale zosavuta kusintha mawonekedwe ake pomanga.
Limbikitsani kukana kwa ming'alu: Popeza HPMC imatha kuwonjezera mphamvu yomangirira ndi kulimba kwamatope, imatha kupititsa patsogolo kukana kwa matope pamlingo wina ndikuletsa ming'alu yoyambitsidwa ndi mphamvu zakunja kapena kuchepa.
2. Zotsatira za HPMC pa kusakwanira kwa matope
Kusasunthika kwa matope kumatanthawuza kuthekera kwake kukana kulowa kwa madzi pansi pa mphamvu ya madzi. Kusakwanira kwa matope kumakhudzidwa ndi zinthu zambiri, zofunika kwambiri zomwe ndi kapangidwe ka pore, kachulukidwe ndi kuchuluka kwa simenti ya simenti. HPMC imapangitsa kuti matope asawonongeke pazinthu izi:
Kupititsa patsogolo microstructure ya matope
Kusasunthika kwa matope kumagwirizana kwambiri ndi microstructure yake. Pali gawo lina la pores mumatope, omwe ndi njira zazikulu zolowera madzi. Kuwonjezera kwa HPMC kungachepetse porosity mwa kupanga mapangidwe abwino. Makamaka, HPMC imatha kuyanjana ndi tinthu tating'ono ta simenti mumtondo wa simenti, kulimbikitsa njira ya simenti ya simenti, kupanga phala la simenti kukhala lolimba, kuchepetsa mapangidwe a pores akulu, motero kumathandizira kachulukidwe kamatope. Chifukwa cha kuchepa kwa pores, njira yolowera m'madzi imakhala yayitali, motero imapangitsa kuti matope asawonongeke.
Kupititsa patsogolo kasungidwe ka madzi mumatope komanso kulimbikitsa hydration ya simenti
Ma hydration reaction ya simenti amafunikira madzi okwanira kuti apitirire, ndipo kukwanira kwa simenti ya simenti kumakhudza mwachindunji mphamvu ndi kusakwanira kwa matope. HPMC imatha kuchepetsa kutuluka kwa madzi kudzera mumadzi osungira madzi, kotero kuti matope amatha kusunga madzi okwanira panthawi yomanga ndi kulimbikitsa kusungunuka kwa simenti. Panthawi ya simenti ya hydration, zinthu zambiri za hydration zidzapangidwa mu phala la simenti, lomwe limadzaza ma pores oyambirira, kupititsa patsogolo kachulukidwe ka matope, ndiyeno kumapangitsa kuti asawonongeke.
Wonjezerani mphamvu yolumikizana ya matope
HPMC imatha kupititsa patsogolo kumamatira pakati pa matope ndi pansi powonjezera mphamvu yomangira yamatope. Izi zitha kupewa kusefukira kwamadzi chifukwa cha kukhetsedwa kwamatope kapena ming'alu. Makamaka m'magawo ena owonekera, kukulitsa mphamvu zomangirira kumatha kuchepetsa njira yolowera m'madzi. Kuphatikiza apo, kulumikizana kwabwino kwa HPMC kumathanso kupangitsa kuti dothi likhale losalala, ndikuchepetsanso kulowa kwamadzi.
Kuletsa mapangidwe ming'alu
Mapangidwe a ming'alu ndi chinthu chofunikira chomwe chimakhudza kusakwanira kwa matope. Ma Microcracks mumatope ndiye njira zazikulu zolowera madzi. HPMC ikhoza kuchepetsa mapangidwe a ming'alu mwa kuwongolera ductility ndi kukana kwa matope, ndikuletsa madzi kulowa mumatope kudzera m'ming'alu. Panthawi yomanga, HPMC imatha kuchepetsa vuto la ming'alu chifukwa cha kusintha kwa kutentha kapena kusakhazikika kwapansi, potero kumapangitsa kuti matope asawonongeke.
3. Kugwiritsa ntchito HPMC mumatope osiyanasiyana
Mitundu yosiyanasiyana ya matope imakhala ndi zofunikira zosiyana kuti zisawonongeke, ndipo zotsatira za ntchito za HPMC mumatope awa ndizosiyana. Mwachitsanzo:
Mtondo wa pulasitala: Mtondo wa pulasitala nthawi zambiri umagwiritsidwa ntchito ngati chivundikiro chakunja kwa nyumbayo, ndipo zomwe zimafunikira kuti zisawonongeke ndizokwera kwambiri. Kugwiritsa ntchito HPMC mumatope a pulasitala kumatha kukulitsa kukana kwa ng'alu komanso kusasunthika kwa matope, makamaka m'malo achinyezi, HPMC imatha kuletsa kulowa kwa chinyezi ndikusunga makoma amkati mwanyumbayo mouma.
Mtondo wopanda madzi: Ntchito yayikulu yamatope osalowa madzi ndikuletsa kulowa kwamadzi, motero zofunikira zake zosagwirizana ndizovuta kwambiri. HPMC imatha kusintha kachulukidwe ka dothi lopanda madzi, kuwonjezera kuchuluka kwa simenti ya simenti, motero kumapangitsa kuti matope asalowe madzi.
Tondo wapansi: Tondo wapansi ukhoza kukokoloka ndi madzi pakagwiritsidwa ntchito nthawi yayitali, makamaka m'malo achinyezi. HPMC ikhoza kukulitsa moyo wautumiki wa matope apansi powongolera kusakwanira kwa matope.
Monga chowonjezera, HPMC imatha kusintha kwambiri kusakwanira kwa matope. Mwa kukonza microstructure ya matope, kupititsa patsogolo kusungirako madzi, kulimbitsa mphamvu zomangira, ndikuwongolera kukana kwa crack,Mtengo wa HPMCimatha kupanga matope kukhala ophatikizika kwambiri, kuchepetsa njira yolowera m'madzi, motero kumapangitsa kuti matope asalowerere. Pakugwiritsa ntchito, kuwonjezera kwa HPMC kumatha kupititsa patsogolo ntchito yomanga matope ndikukulitsa moyo wautumiki wa nyumba. Choncho, HPMC ali yotakata chiyembekezo ntchito zosiyanasiyana ntchito monga madzi, pulasitala ndi pansi matope.
Nthawi yotumiza: Jan-16-2025