Ufa wa latex wosungunuka ndi chinthu chogwiritsidwa ntchito kwambiri popanga zinthu zachilengedwe, chomwe chingathe kusungunukanso mofanana m'madzi kuti chipange emulsion mutakhudzana ndi madzi. Kuwonjezera ufa wa latex wosungunukanso kungathandize kuti madzi asamayende bwino mu matope osakaniza a simenti, komanso kuti matope olimba a simenti akhale olimba, osasunthika, osalowa madzi komanso osagwirizana ndi dzimbiri. Ufa wa latex umasintha kusinthasintha ndi kutsetsereka kwa dongosololi mukamasakaniza monyowa, ndipo mgwirizano umawonjezeka powonjezera ufa wa latex. Pambuyo pouma, umapereka malo osalala komanso okhuthala okhala ndi mphamvu yogwirizana, ndipo umawonjezera mphamvu yolumikizirana ya mchenga, miyala ndi ma pores. , wolemeretsedwa kukhala filimu pamalo olumikizirana, zomwe zimapangitsa kuti zinthuzo zikhale zosinthasintha, zimachepetsa elastic modulus, zimayamwa kutentha kwambiri, ndipo zimakhala ndi kukana madzi kumapeto, ndipo kutentha kwa buffer ndi kusintha kwa zinthu sizikugwirizana.
Kupangidwa kwa filimu yopitilira ya polima ndikofunikira kwambiri pakugwira ntchito kwa mortars ya simenti yosinthidwa ndi polima. Pa nthawi yokhazikitsa ndi kulimbitsa phala la simenti, mabowo ambiri amapangidwa mkati, omwe amakhala magawo ofooka a phala la simenti. Pambuyo poti ufa wa latex wosungunukanso wawonjezeredwa, ufa wa latex umafalikira nthawi yomweyo mu emulsion ukakumana ndi madzi, ndikusonkhana m'dera lodzaza ndi madzi (ndiko kuti, m'bowo). Pamene phala la simenti limakhala lolimba, kuyenda kwa tinthu ta polima kumakhala kocheperako, ndipo kupsinjika pakati pa madzi ndi mpweya kumazikakamiza kuti zigwirizane pang'onopang'ono. Tinthu ta polima tikakumana, netiweki ya madzi imaphwa kudzera m'mitsempha yamagazi, ndipo polima imapanga filimu yopitilira kuzungulira bowo, kulimbitsa malo ofooka awa. Pakadali pano, filimu ya polima singathe kungosewera gawo la hydrophobic, komanso osatseka capillary, kotero kuti zinthuzo zimakhala ndi hydrophobic yabwino komanso mpweya wolowera.
Chomera cha simenti chopanda polima chimalumikizidwa momasuka kwambiri. M'malo mwake, chomera cha simenti chosinthidwa cha polima chimapangitsa chomera chonsecho kukhala chogwirizana kwambiri chifukwa cha kukhalapo kwa filimu ya polima, motero chimakhala ndi mphamvu zabwino zamakina komanso kukana nyengo. Mu chomera cha simenti chosinthidwa cha latex powder, ufa wa latex umawonjezera porosity ya phala la simenti, koma umachepetsa porosity ya malo osinthira pakati pa phala la simenti ndi aggregate, zomwe zimapangitsa kuti porosity yonse ya chomeracho isasinthe kwenikweni. Pambuyo poti ufa wa latex wapangidwa kukhala filimu, ukhoza kutseka bwino ma pores mu chomeracho, zomwe zimapangitsa kuti kapangidwe ka malo osinthira pakati pa phala la simenti ndi aggregate kakhale kolimba kwambiri, ndipo kukana kwa pulasitiki ya latex powder modified kumawonjezeka, ndipo kuthekera kokana kuwonongeka kwa zinthu zovulaza kumawonjezeka. Zili ndi zotsatira zabwino pakukweza kulimba kwa chomeracho.
Nthawi yotumizidwa: Marichi-14-2023