EPS granular matenthedwe kutchinjiriza matope ndi opepuka matenthedwe kutchinjiriza zakuthupi wosakanizidwa organic binder, organic binder, admixture, admixture ndi kuwala aggregate mu gawo linalake. Pakafukufuku wapano ndikugwiritsa ntchito matope a EPS particle insulation matope, ufa wobwezeretsedwanso wa latex umakhudza kwambiri magwiridwe antchito a matopewo ndipo umakhala wokwera kwambiri pamtengo wake, motero nthawi zonse wakhala chidwi chake. Kulumikizana kwa EPS tinthu tating'onoting'ono totchingira matope kunja kwa khoma lotenthetsera kutentha makamaka kumachokera ku polima binder, ndipo chigawo chake chimakhala vinyl acetate/ethylene copolymer. Mtundu uwu wa emulsion wa polima ukhoza kuumitsidwa kuti upeze ufa wopangidwanso ndi latex. Chifukwa chakukonzekera bwino kwa ufa wa latex wopangidwanso pomanga, mayendedwe osavuta komanso kusungirako kosavuta, ufa wotayirira wa ma polima wasanduka chikhalidwe chachitukuko chifukwa chakukonzekera 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 yapamwamba komanso yotsika Tg (kutentha kwa kutentha kwa galasi) imakhala ndi zinthu zabwinoko potengera mphamvu yamphamvu, kulimba kwa mgwirizano komanso kukana madzi.
Kukhathamiritsa kwa ntchito ya redispersible latex ufa pamatope ndi chifukwa chakuti polima ufa ndi mkulu molecular polima ndi magulu polar. Pamene RDP imasakanizidwa ndi tinthu tating'onoting'ono ta EPS, gawo lopanda polar mu unyolo waukulu wa ufa wa polima udzawoneka bwino ndi malo osakhala a polar a EPS. The magulu polar mu polima ndi zochokera kunja pamwamba pa EPS particles, kupanga EPS particles kusintha kuchokera hydrophobic kuti hydrophilic. Chifukwa cha kusinthidwa kwa pamwamba pa EPS particles ndi polima ufa, vuto kuti EPS particles n'zosavuta kukumana madzi kuthetsedwa. Kuyandama, mavuto aakulu a matope delamination. Panthawi imeneyi, powonjezera simenti ndi oyambitsa, magulu polar adsorbed padziko EPS particles kucheza ndi particles simenti ndi kuphatikiza kwambiri, amene kwambiri bwino workability wa EPS kutchinjiriza matope. Izi zikuwonekera mu mfundo yakuti ma EPS particles amanyowetsedwa mosavuta ndi slurry ya simenti, ndipo mphamvu yogwirizanitsa pakati pa ziwirizi imakhala bwino kwambiri.
Pambuyo pa emulsion ndi redispersible latex ufa apangidwa kukhala filimu, amatha kupanga mphamvu zamakokedwe apamwamba ndi mphamvu zomangira pazinthu zosiyanasiyana. Amagwiritsidwa ntchito ngati chomangira chachiwiri mumatope kuphatikiza ndi simenti, simenti ndi polima motsatana. Sewerani mphamvu zofananira ndikuwongolera magwiridwe antchito a matope. Poona microstructure wa zinthu polima-simenti gulu, amaona kuti Kuwonjezera redispersible latex ufa angapangitse filimu polima kukhala mbali ya dzenje khoma, ndi kupanga matope mawonekedwe lonse kudzera mkati mphamvu, amene bwino mkati mphamvu ya matope. Mphamvu ya polima, potero imakulitsa kupsinjika kwa matope ndikuwonjezera kupsinjika komaliza. Kuphunzira ntchito yaitali redispersible latex ufa mu matope, anaona ndi kupanga sikani electron maikulosikopu, patapita zaka 10, ndi microstructure wa polima mu matope sizinasinthe, kukhalabe kugwirizana khola, flexural mphamvu ndi compressive mphamvu komanso Hydrophobic wabwino. Kutenga redispersible latex powder monga chinthu chofufuzira, njira yopangira mphamvu yolumikizira matailosi idaphunziridwa, ndipo zidapezeka kuti polima ataumitsidwa mufilimu, filimu ya polima idapanga kulumikizana kosinthika pakati pa matope ndi matailosi mbali imodzi, ndipo mbali inayo, ma polima mumatope amawonjezera zomwe zili mumatope, zomwe zimakhudza kusalala komanso kukhazikika kwa polima, komanso kukhazikika kwa dothi. zotsatira zabwino pa hydration ndondomeko ndi shrinkage wa simenti. Zomatira, zonsezi zimathandizira kukulitsa mphamvu ya mgwirizano.
Kuwonjezera redispersible latex ufa ku matope akhoza kwambiri kusintha mphamvu kugwirizana ndi zipangizo zina, chifukwa madzi gawo la hydrophilic polima ufa ndi simenti kuyimitsidwa likulowerera mu pores ndi capillaries a masanjidwewo, pamene latex ufa likulowerera mu pores ndi Mu capillary. Kanema wamkati amapangidwa ndikumangiriridwa mwamphamvu pamwamba pa gawo lapansi, motero kuonetsetsa kuti mgwirizano wabwino pakati pa zinthu za gelled ndi gawo lapansi.
Nthawi yotumiza: Jun-16-2023