EPS granular thermal insulation mortar is lightweight thermal insulation material yakasanganiswa nema inorganic binders, organic binders, admixtures, additives and light aggregates mune imwe chikamu. Pakati peEPS granular thermal insulation mortars parizvino yakatsvagirwa nekushandiswa, inogona kudzokororwa Yakaparadzirwa latex poda ine simba guru pakuita kwedhaka uye inotora chikamu chepamusoro mumutengo, saka yanga iri iyo pfungwa yekutariswa kwevanhu. Kuita kwekubatanidza kweEPS particle insulation mortar yekunze madziro ekudzivirira system inonyanya kunobva kune polymer binder, uye kuumbwa kwayo kunowanzo vinyl acetate/ethylene copolymer. Redispersible latex poda inogona kuwanikwa nekupfapfaidza kuomesa iyi mhando yepolymer emulsion. Nekuda kwegadziriro chaidzo, kufambisa kuri nyore uye kuchengetedzeka kuri nyore kweadhispersible latex poda mukuvaka, yakakosha yakasununguka latex poda yave nzira yekusimudzira nekuda kwekugadzirira kwayo, kufambisa kuri nyore uye kuchengetedza kuri nyore. Kuita kweEPS particle insulation mortar kunoenderana zvakanyanya nemhando uye huwandu hwepolymer inoshandiswa. Ethylene-vinyl acetate latex powder (EVA) ine yakakwira ethylene content uye yakaderera Tg (girazi shanduko tembiricha) kukosha ine kuita kurinani maererano nemhedzisiro simba, bond simba uye kudzivirira mvura.
Kugadziriswa kwe latex powder pakushanda kwedhaka kunokonzerwa nekuti latex powder ndeyepamusoro molecular polymer ine mapoka epolar. Kana latex poda yakasanganiswa neEPS particles, iyo isiri-polar segment mucheni huru ye latex powder polymer ichaita Physical adsorption ichaitika neiyo isiri-polar pamusoro peEPS. Mapoka epolar ari mupolymer anotariswa kunze pamusoro peEPS particles, kuitira kuti maEPS particles ashanduke kubva kuhydrophobicity kuenda kuhydrophilicity. Pamusana pekushandurwa kwepamusoro peEPS particles ne latex powder, inogadzirisa dambudziko rekuti EPS particles inoratidzirwa nyore nyore kumvura. Kuyangarara, dambudziko rekukura kukuru kwedhaka. Panguva ino, kana simende yawedzerwa uye yakasanganiswa, mapoka epolar adsorbed pamusoro peEPS particles anopindirana nezvikamu zvesimende uye anobatanidza zvakanyanya, kuitira kuti kushanda kweEPS insulation mortar kuwedzere. Izvi zvinoratidzwa mukuti zvimedu zveEPS zvinonyoroveswa nyore nyore nesamende paste, uye simba rekubatanidza pakati pezviviri rinovandudzwa zvikuru.
Emulsion uye redispersible latex powder inogona kuumba simba guru uye simba rekubatanidza pane zvakasiyana-siyana mushure mekugadzirwa kwefirimu, inoshandiswa sechipiri binder mudhaka kuti isanganise neinorganic binder simende, simende uye polymer zvakateerana Ipa kutamba kwakazara kune simba rinoenderana nekuvandudza kushanda kwedhaka. Nokucherechedza microstructure yepolymer-cement composite material, zvinotendwa kuti kuwedzerwa kwelatex powder inogona kuita kuti polymer iite firimu uye ive chikamu chemadziro egomba, uye kuita kuti dhaka rive rakazara kuburikidza nesimba remukati, iro rinovandudza simba remukati revhu. Polymer simba, nekudaro kuvandudza kutadza kushushikana kwedhaka uye kuwedzera iyo yekupedzisira kuomarara. Kuti udzidze kushanda kwenguva refu ye redispersible latex powder mudhaka, yakaonekwa neSEM kuti mushure memakore gumi, microstructure yepolymer mumatope haina kuchinja, kuchengetedza kugadzikana kwakagadzikana, kushanduka uye kudzvinyirira simba uye mvura yakanaka yekudzivirira. Magadzirirwo esimba rekunamira rematairi akaongororwa pane redispersible latex poda, uye zvakaonekwa kuti mushure mekunge polymer yakaomeswa kuita firimu, firimu repolymer rakagadzira hukama hunochinja pakati pedhaka netirairi kune rumwe rutivi, uye kune rumwe rutivi, Iyo polymer mudhaka inowedzera mhepo yedhaka uye inokanganisa maumbirwo uye kunyorova kwepolymer panguva yekumisikidza kwepamusoro, uye ine simba rekunyorovesa pamusoro penzvimbo. hydration process uye shrinkage ye simenti mune binder, Zvese izvi zvichabatsira kuvandudza chisungo chesimba.
Kuwedzera redispersible latex poda kudhaka kunogona kuvandudza zvakanyanya kusimba kwekubatanidza nezvimwe zvinhu, nekuti iyo hydrophilic latex poda uye yemvura chikamu chesimende yekumisikidza inopinda mumapores uye capillaries yematrix, uye latex hupfu inopinda mumapores uye capillaries. Iyo yemukati firimu inoumbwa uye yakasimba adsorbed pamusoro peiyo substrate, nokudaro kuve nechokwadi chehutano hwakanaka hwechisungo pakati peiyo cementitious zvinhu uye substrate.
Nguva yekutumira: Feb-20-2023