Redispersible latex ufa ndi simenti ndizomwe zimagwirizanitsa ndi kupanga mafilimu a putty osalowa madzi. Mfundo yosamva madzi ndi:
Pa kusakaniza ndondomeko redispersible latex ufa ndi simenti, ndi lalabala ufa mosalekeza kubwezeretsedwa kwa choyambirira emulsion mawonekedwe, ndi lalabala particles ndi uniformly omwazikana mu simenti slurry. Simenti ikakumana ndi madzi, hydration reaction imayamba, yankho la Ca (OH) 2 limadzaza ndipo makhiristo amatenthedwa, ndipo makristasi a ettringite ndi hydrated calcium silicate colloids amapangidwa nthawi yomweyo, ndipo tinthu ta latex timayikidwa pa gel osakaniza. opanda madzi. pa tinthu ta simenti.
Ndi kupita patsogolo kwa hydration zimachitikira, ndi hydration mankhwala akupitiriza kuwonjezeka, ndi lalabala particles pang'onopang'ono kusonkhana mu voids wa zinthu zosawerengeka monga simenti, ndi kupanga mwamphamvu odzaza wosanjikiza pamwamba pa gel osakaniza simenti. Chifukwa kuchepa pang'onopang'ono youma chinyezi, ndi redispersed latex particles mwamphamvu ankanyamula mu gel osakaniza ndi voids aggregate kupanga mosalekeza filimu, kupanga osakaniza ndi simenti phala interpenetrating masanjidwewo, ndi kupanga simenti phala ndi ufa fupa glued wina ndi mzake. . Chifukwa tinthu ta latex timalumikizana ndikupanga filimu m'malo osinthika a simenti ndi ufa wina, malo osinthika amtundu wa putty system ndi wandiweyani, motero amakulitsa kukana kwake kwamadzi.
Pa nthawi yomweyo, magulu yogwira kwaiye ndi redispersible latex ufa pambuyo redispersion, monga zinchito monomer methacrylic asidi anayambitsa pa synthesis wa emulsion, muli magulu carboxyl, amene akhoza kuwoloka kugwirizana ndi Ca2+, Al3+, etc. simenti heavy calcium hydration mankhwala. , pangani chomangira chapadera cha mlatho, sinthani mawonekedwe a thupi lolimba la simenti, ndikuwonjezera kuphatikizika kwa mawonekedwe a putty. Tinthu tating'onoting'ono ta latex timene timatulutsa timapanga filimu yosalekeza komanso wandiweyani mu voids ya putty system.
Nthawi yotumiza: Nov-01-2022