Izongezo zeConcrete eziKhala | Ii-Agents eziFoaming eziSebenza ngokuPhezulu kwiSellula Concrete
Iyaziwa ngeempawu zayo ezibalaseleyo zokugquma i-thermal, i-silica airgel ivuliwe, ezinemingxuma, yakhiwe kakuhle, ilula, i-hydrophobic synthetic amorphous silica. Ubume bayo bunciphisa indlela yomoya okhululekileyo, ngaloo ndlela kuncitshiswe i-thermal conductivity yayo. Ikwawagxotha kakhulu amanzi kwaye nomphunga uyangena. Ngoko ke ingasetyenziselwa izicelo zokwakha ukubonelela ngolawulo lomswakama kunye nokulawula.
Ii-aerogels ze-silica ziveliswa yinkqubo ye-sol-gel usebenzisa i-allkoxide precursors ephantsi njenge-TEOS okanye i-TMOS okanye i-asilicic acid enyibilikayo emanzini. (Na2SiO3). I-gelation yala ma-precursors inokubangelwa ukunyuka kweqondo lokushisa, utshintsho pH, i-adsorption okanye i-nucleation eyenziwe ngemitha. Ii-aerogels ze-silica zibonakaliswa ngummandla wazo ophakamileyo kakhulu ukusuka phezulu ukuya 1000 m2 g-1). Umphezulu wazo u-amorphous, non-crystalline, kwaye ube ne-transparency ephezulu kunye ne-low refractive index. I-doping ye-aerogels kunye nee-oxide zetsimbi zenguqu ezifana ne-vanadia ziphumela kwii-catalysts ezisebenzayo.[1]
Ngaphezu koko, babonisa iimpawu ezinomdla ezifana nokuguquguquka okuphezulu kunye nokukwazi ukubuyisela isimo emva kokukhulula. Ngesi sizathu, zinomtsalane kwizicelo ezininzi. Ukuze kuvavanywe iimpawu zabo mechanical, uthotho lweesampulu zenziwa ngokuxuba ugxininiso olwahlukileyo (5 wt% kwaye 10 wt%) ye-silica airgel enerabha ehlaziyiweyo kunye ne-PVB. Ezi zidityani ziye zaphantsi kovavanyo loxinzelelo kwiCarver laboratory hydraulic press.. Amaxabiso afunyenweyo emodyuli eNtsha yeesampulu zisuka 69-98 Pa, ebonisa ukunwebeka kwabo okuhle. Ngaphaya koko, zonke iisampulu zibonise isakhono esiphezulu sokufunxa ulwelo lwendalo.