EPS granular matenthedwe kutchinjiriza matope ndi opepuka matenthedwe kutchinjiriza chuma chosakanizidwa ndi organic binders, organic binders, admixtures, zowonjezera ndi kuwala aggregates mu gawo linalake. Pakati pa EPS granular matenthedwe kutchinjiriza matope matope panopa kafukufuku ndi ntchito, akhoza zobwezerezedwanso Omwazika latex ufa ali ndi chikoka chachikulu pa ntchito ya matope ndipo ali ndi gawo lalikulu pa mtengo, choncho wakhala cholinga cha anthu chidwi. Kugwirizana kwa EPS particle insulation matope kunja kwa khoma kutchinjiriza dongosolo makamaka amachokera polima binder, ndipo kapangidwe ake makamaka vinyl acetate/ethylene copolymer. Redispersible latex ufa akhoza analandira ndi kutsitsi kuyanika mtundu uwu wa polima emulsion. Chifukwa cha kukonzekera kolondola, mayendedwe osavuta komanso kusungirako kosavuta kwa ufa wa latex wopangidwanso pomanga, ufa wapadera wa latex wasanduka njira yachitukuko chifukwa cha kukonzekera kwake, mayendedwe osavuta komanso kusungirako kosavuta. Kuchita kwa matope a EPS particle insulation kumadalira kwambiri mtundu ndi kuchuluka kwa polima wogwiritsidwa ntchito. Ethylene-vinyl acetate latex powder (EVA) yokhala ndi ethylene yochuluka komanso yotsika Tg (kutentha kwa magalasi) imakhala ndi ntchito yabwino pokhudzana ndi mphamvu zowonongeka, mphamvu zomangira komanso kukana madzi.
Kukhathamiritsa kwa ufa wa latex pa ntchito ya matope ndi chifukwa chakuti ufa wa latex ndi ma polima apamwamba omwe ali ndi magulu a polar. Pamene latex ufa wothira EPS particles, sanali polar gawo mu unyolo waukulu wa latex ufa polima adzakhala Thupi adsorption zidzachitika ndi sanali polar padziko EPS. Magulu polar mu polima ndi zochokera kunja pamwamba pa EPS particles, kuti EPS particles kusintha hydrophobicity kuti hydrophilicity. Chifukwa cha kusinthidwa kwa pamwamba pa EPS particles ndi latex powder, imathetsa vutoli kuti ma EPS particles amawonekera mosavuta m'madzi. Kuyandama, vuto lalikulu kusanjikiza matope. Panthawi imeneyi, pamene simenti anawonjezera ndi kusakaniza, magulu polar adsorbed pamwamba pa EPS particles kucheza ndi particles simenti ndi kuphatikiza kwambiri, kotero kuti workability wa EPS kutchinjiriza matope kwambiri bwino. Izi zikuwonekera mu mfundo yakuti ma EPS particles amanyowetsedwa mosavuta ndi phala la simenti, ndipo mphamvu yogwirizanitsa pakati pa ziwirizi imakhala bwino kwambiri.
Emulsion ndi redispersible latex ufa akhoza kupanga mkulu kumakokedwa mphamvu ndi kugwirizana mphamvu pa zipangizo zosiyanasiyana pambuyo filimu mapangidwe, iwo ntchito monga binder wachiwiri mu matope kuphatikiza ndi organic binder simenti, simenti ndi polima motero Perekani kusewera kwathunthu kwa lolingana mphamvu kusintha ntchito ya matope. Poona microstructure wa polima-simenti gulu zakuthupi, akukhulupirira kuti Kuwonjezera redispersible latex ufa akhoza kupanga polima kupanga filimu ndi kukhala mbali ya dzenje khoma, ndi kupanga matope mawonekedwe lonse kudzera mkati mphamvu, zomwe zimawonjezera mphamvu yamkati ya matope. Mphamvu ya polima, potero imakulitsa kupsinjika kwa matope ndikuwonjezera kupsinjika komaliza. Kuphunzira ntchito yaitali redispersible latex ufa mu matope, izo zinaonedwa ndi SEM kuti patapita zaka 10, ndi microstructure wa polima mu matope sizinasinthe, kukhalabe kugwirizana khola, flexural ndi compressive mphamvu ndi zabwino repellency madzi. Njira yopangira mphamvu yomatira matailosi idaphunziridwa pa ufa wa latex wopangidwanso, ndipo zidapezeka kuti polima atawumitsidwa kukhala filimu, filimu ya polima idapanga kulumikizana kosinthika pakati pa matope ndi matailosi mbali imodzi, ndi kupitilira apo. Komano, The polima mu matope kumawonjezera mpweya zili mu matope ndi zimakhudza mapangidwe ndi wettability pamwamba, ndipo kenako pa ndondomeko yokonza polima imakhalanso ndi chikoka chabwino pa hydration ndondomeko ndi shrinkage wa simenti mu binder, Zonsezi zithandizira kukulitsa mphamvu ya mgwirizano.
Kuwonjezera redispersible latex ufa ku matope akhoza kwambiri kusintha mphamvu yomangira ndi zipangizo zina, chifukwa hydrophilic latex ufa ndi madzi gawo la kuyimitsidwa simenti kudutsa mu pores ndi capillaries a masanjidwewo, ndi lalabala ufa likulowerera mu pores ndi capillaries. . Filimu yamkati imapangidwa ndikumangika mwamphamvu pamwamba pa gawo lapansi, motero kuonetsetsa kuti pali mgwirizano wabwino pakati pa zinthu za simenti ndi gawo lapansi.
Nthawi yotumiza: Feb-17-2023