EPS granular thermal insulation mortar chinhu chakareruka chekudzivirira kupisa chakasanganiswa ne inorganic binders, organic binders, admixtures, additives uye light aggregates mune imwe share. Pakati peEPS granular thermal insulation mortars dziri kutsvakurudzwa uye kushandiswa parizvino, dzinogona kudzokororwa. Dispersed latex powder ine simba guru pakushanda kwemortar uye inotora chikamu chikuru mumutengo, saka yave iri chinhu chinonyanya kutariswa nevanhu. Kushanda kwekubatanidza kweEPS particle insulation mortar external wall insulation system kunonyanya kubva kupolymer binder, uye maumbirwo ayo anonyanya kuve vinyl acetate/ethylene copolymer. Redispersible latex powder inogona kuwanikwa nekuomesa rudzi urwu rwepolymer emulsion. Nekuda kwekugadzirira kwakarurama, kutakurwa kuri nyore uye kuchengetwa kuri nyore kwe redispersible latex powder mukuvaka, special loose latex powder yave trend yekukura nekuda kwekugadzirira kwayo kwakarurama, kutakurwa kuri nyore uye kuchengetwa kuri nyore. Kushanda kweEPS particle insulation mortar kunoenderana zvakanyanya nerudzi nehuwandu hwepolymer inoshandiswa. Ethylene-vinyl acetate latex powder (EVA) ine ethylene yakawanda uye Tg shoma (girazi transition temperature) inoshanda zviri nani kana tichitarisa simba reimpact, simba rebond uye kuramba mvura.
Kugadziriswa kwehupfu hwelatex pakushanda kwemota kunokonzerwa nekuti upfu hwelatex ipolymer ine mamorekuru akawanda ane mapoka epolar. Kana upfu hwelatex hukasanganiswa nezvikamu zveEPS, chikamu chisiri chepolar chiri muketani huru yepolymer yelatex powder chichaitwa. Kunyudzwa kwemuviri kuchaitika nepamusoro peEPS pasina polar. Mapoka epolar ari mupolymer anotarisa kunze pamusoro pezvikamu zveEPS, kuitira kuti zvikamu zveEPS zvishanduke kubva pakushaya mvura kuenda pakushaya mvura. Nekuda kwekushandurwa kwepamusoro pezvikamu zveEPS neupfu hwelatex, zvinogadzirisa dambudziko rekuti zvikamu zveEPS zvinosangana nemvura zviri nyore. Kuyangarara, dambudziko rekuiswa kwemota yakakura. Panguva ino, kana simende yawedzerwa uye yasanganiswa, mapoka epolar anobatanidzwa pamusoro pezvikamu zveEPS anosangana nezvikamu zvesimende uye anosangana zvakanyanya, kuitira kuti kushanda kwemota yeEPS insulation kuve nani zvikuru. Izvi zvinoratidzwa mukuti zvikamu zveEPS zvinonyoroveswa nyore nyore ne cement paste, uye simba rekubatana pakati pezviviri rinovandudzika zvikuru.
Upfu hwe emulsion ne redispersible latex hunogona kugadzira simba guru rekusunga uye simba rekubatanidza pazvinhu zvakasiyana mushure mekuumbwa kwefirimu, hunoshandiswa sechipiri chinosunga muhari kuti chisanganiswe nesimende, simende uye polymer zvisina kugadzirwa. Hunopa simba rakazara rekuvandudza mashandiro ehari. Nekutarisa chimiro chepurasitiki-simende, zvinotendwa kuti kuwedzerwa kwe redispersible latex powder kunogona kuita kuti polymer iite firimu uye ive chikamu chemadziro egomba, uye kuita kuti hari iite yese kuburikidza nesimba remukati, izvo zvinovandudza simba remukati rehari. Simba repolymer, nokudaro zvichivandudza kushushikana kwehari uye kuwedzera kumanikidzwa kwehari. Kuti tidzidze mashandiro enguva refu e redispersible latex powder muhari, zvakaonekwa neSEM kuti mushure memakore gumi, chimiro chepolymer muhari hachina kuchinja, kuchengetedza kubatana kwakasimba, simba rekudzvanya uye rekumanikidza uye kudzivirira mvura zvakanaka. Maitiro ekuumbwa kwesimba rekunamira mataira akaongororwa paupfu hwelatex hunonyungudika, uye zvakaonekwa kuti mushure mekunge polymer yaoma kuita firimu, firimu repolymer rakagadzira kubatana kunochinjika pakati pemota netaira kune rumwe rutivi, uye kune rumwe rutivi, polymer iri mumota inowedzera huwandu hwemhepo mumota uye inokanganisa kuumbwa uye kunyorova kwepamusoro, uye mushure meizvozvo panguva yekuiswa kwemota, polymer inewo simba rakanaka pakuita kwemvura uye kuderera kwesimende mu binder, Zvese izvi zvichabatsira kuvandudza simba rebond.
Kuwedzera upfu hwelatex hunonyungudika mumota kunogona kuvandudza simba rekubatanidza nezvimwe zvinhu, nekuti upfu hwelatex hunonyungudika uye chikamu chemvura chesimende chinonyungudika zvinopinda mumaburi nemakapillari e matrix, uye upfu hwelatex hunopinda mumaburi nemakapillari. Firimu remukati rinoumbwa uye rinonamirwa zvakasimba pamusoro pe substrate, zvichiita kuti pave nesimba rakanaka rekubatanidza pakati pechinhu chinosimbisa ne substrate.
Nguva yekutumira: Kukadzi-20-2023