M'zaka zaposachedwa, makampani omangamanga awona kusintha kwakukulu kogwiritsa ntchito konkire yogwira ntchito kwambiri kuti akwaniritse zofunikira zantchito zamakono zamakono.Chimodzi mwa zinthu zofunika kwambiri za konkire yogwira ntchito kwambiri ndi binder, yomwe imamangiriza tinthu tating'onoting'ono tomwe timapanga matrix amphamvu komanso olimba.Pakati pa mitundu yosiyanasiyana ya zomatira, kugwiritsa ntchito zomatira za polymeric kwadziwika chifukwa cha kuthekera kwake kupereka zinthu zomwe zimafunidwa monga kuchuluka kwa kulimba komanso kusinthasintha.
Chimodzi mwazinthu zomangira ma polima omwe amagwiritsidwa ntchito kwambiri pa konkire yogwira ntchito kwambiri ndi RDP (Redispersible Polymer Powder) polima binder.Zomangira ma polima a RDP ndi ufa wosakanizika wowuma womwe umatha kusakanikirana mosavuta ndi zinthu zina kuti apange zosakaniza za konkriti ndi kusinthasintha kowonjezereka komanso kukana madzi.Kuwonjezera zomangira ma polima a RDP ku konkire ndikothandiza makamaka pamapulogalamu omwe konkriti ikuyembekezeka kukhala ndi kupsinjika kwakukulu kapena kupitilira kukulitsa ndi kutsika pafupipafupi.
Ubwino umodzi waukulu wa zomatira za polima za RDP ndikusintha kwawo kolumikizana.Zomangamanga za polima za RDP zimakhala ndi mankhwala omwe amawathandiza kumamatira mwamphamvu kuphatikizira tinthu tating'onoting'ono ndi zinthu zina pakusakaniza konkire.Izi zimapangitsa matrix a konkire kukhala olimba komanso olimba, kukana kuwonongeka kwa mphamvu zakunja monga kuzizira kwamadzimadzi, ma abrasion ndi mphamvu.
Phindu lina la zomangira ma polima a RDP ndikutha kwawo kukulitsa kusinthasintha kwa zosakaniza za konkriti.Zosakaniza zachikhalidwe za konkire nthawi zambiri zimakhala zowonongeka ndipo zimakhala zosavuta kusweka pamene zimakhala zovuta kwambiri kapena kusintha kwa kutentha.Zomangira za polima za RDP zitha kusinthidwa kuti zitheke kusinthasintha, kulola kusakanikirana kwa konkriti kuti kulimbana ndi zovuta izi popanda kusweka.Kusinthasintha kowonjezerekaku kumachepetsanso chiwopsezo cha delamination kapena kuwonongeka kwina pakumanga kapena kugwiritsa ntchito.
Kuphatikiza pakupereka kulimba kwambiri komanso kusinthasintha, zomatira za polima za RDP zimalimbananso ndi chinyezi.Zomangamanga za konkire zomwe zimakumana ndi madzi kapena chinyezi kwa nthawi yayitali zimatha kuyambitsa mavuto osiyanasiyana, kuphatikiza kusweka, kuphulika ndi dzimbiri.Zomangamanga za polima za RDP zili ndi ma hydrophobic agents omwe amathandizira kuthamangitsa chinyezi, kuchepetsa chiopsezo cha mavutowa ndikuwongolera magwiridwe antchito anthawi yayitali a konkriti.
Kugwiritsa ntchito zomatira polima za RDP ndizogwirizananso ndi chilengedwe.Mosiyana ndi zosakaniza zachikhalidwe za konkire, zomwe nthawi zambiri zimafuna simenti yochuluka ya Portland, gwero lalikulu la mpweya wa carbon, zomangira za RDP polima zimatha kugwiritsa ntchito ndalama zochepa kuti zikwaniritse ntchito zomwezo.Izi zimachepetsa kuchuluka kwa mpweya wa konkire kusakaniza ndikuthandizira kuchepetsa kuwonongeka kwa chilengedwe.
Ngakhale ali ndi zabwino zambiri, pali zovuta zina zomwe zimagwirizanitsidwa ndi kugwiritsa ntchito zomangira za polima za RDP mu konkire.Chimodzi mwazovuta zazikulu ndikufunika kuwongolera mosamalitsa mlingo ndi kusakanikirana kwa zomangira za polima kuti zitsimikizire kuti zikuyenda bwino.Kumangirira kochepa kwambiri kumapangitsa kuti kumamatira kumachepera komanso kulimba, pomwe zomangira zochulukirapo zimapangitsa kuti mphamvu zichepe komanso kuchepa kwa magwiridwe antchito.Chifukwa chake, ndikofunikira kugwira ntchito ndi wothandizira konkriti wodziwa zambiri yemwe amamvetsetsa za RDP polymer binders ndipo atha kuthandiza kukhathamiritsa ntchito yawo pazinthu zina.
Pali zabwino zambiri zogwiritsira ntchito zomangira polima za RDP mu konkire yogwira ntchito kwambiri.Imakulitsa kulimba ndi kusinthasintha kwa kusakaniza konkire, kumapangitsa kuti kukana kwake kukhale chinyezi, ndipo kumakhala ndi mphamvu yochepa ya chilengedwe kusiyana ndi kusakaniza konkire.Ngakhale kugwiritsidwa ntchito kwawo kumabweretsa zovuta zina, kugwirizanitsa mosamala ndi kusakaniza kungapangitse zotsatira zabwino kwambiri ndikupangitsa kuti pakhale zomanga zamphamvu komanso zokhalitsa.Zomata za polima za RDP ndi chisankho chabwino kwambiri kwa iwo omwe akufuna kumanga nyumba za konkriti zomwe zimatha kupirira zovuta ndikupereka magwiridwe antchito odalirika pakapita nthawi.
Nthawi yotumiza: Oct-16-2023