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 latexr powder (EVA) ine high ethylene content uye yakaderera Tg (girazi yekuchinja tembiricha) kukosha kune kushanda kuri nani maererano nekusimba kwesimba, kusimba kwechisungo uye kushorwa kwemvura.
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 zvakanyanya.
Emulsion uye redispersible latex powder inogona kuumba simba rakasimba uye simba rekubatanidza pazvinhu zvakasiyana mushure mekugadzirwa kwefirimu, dzinoshandiswa sechipiri binder mudhaka kubatanidza ne inorganic binder simende, simende uye polymer zvakateerana Ipa kutamba kwakazara kune anowirirana masimba ekuvandudza. kushanda kwedhaka. Nekucherechedza kuumbwa kwe 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 nechisimba chemukati. iyo inovandudza 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. Iyo yekugadzira dhizaini yesimba rekunamatira tile yakadzidzwa pane inodzokororwa latex poda, uye zvakaonekwa kuti mushure mekunge iyo polymer yakaomeswa mufirimu, iyo polymer firimu yakagadzira kuchinjika kubatana pakati pedhaka uye tile kune rumwe rutivi, uye pamusoro. kune rimwe divi, Iyo polymer mudhaka inowedzera mhepo yedhaka uye inokanganisa kuumbwa uye kunyorova kwepasi, uyezve panguva yekumisikidza iyo polymer inewo simba rakanaka pane. hydration process uye shrinkage ye simenti mune binder, Zvese izvi zvichabatsira kuvandudza chisungo chesimba.
Kuwedzera redispersible latex poda kune dhaka 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 pepamusoro pe substrate, nokudaro kuve nechokwadi chesimba rakanaka rechisungo pakati pesimende zvinhu uye substrate.
Nguva yekutumira: Mar-09-2023