Turmi mai rufi na EPS granular wani abu ne mai sauƙin rufewa na zafi wanda aka haɗa shi da abubuwan ɗaurewa marasa tsari, abubuwan ɗaurewa na halitta, abubuwan haɗawa, ƙari da tarin haske a wani yanki. Daga cikin turmi mai rufi na EPS granular da aka bincika kuma aka yi amfani da shi a yanzu, ana iya sake yin amfani da shi. Fulawar latex da aka watsa tana da babban tasiri akan aikin turmi kuma tana ɗaukar babban rabo a cikin farashi, don haka ta kasance abin da mutane ke mayar da hankali a kai. Aikin haɗakar tsarin rufin bango na waje na turmi mai rufi na EPS galibi ya fito ne daga mahaɗin polymer, kuma abun da ke ciki galibi shine vinyl acetate/ethylene copolymer. Ana iya samun foda mai rufi na latex mai redispersible ta hanyar busar da wannan nau'in emulsion na polymer. Saboda shiri mai kyau, jigilar kaya mai sauƙi da sauƙin adana foda mai rufi na latex mai redispersible a cikin gini, foda mai laushi na musamman na latex ya zama yanayin haɓakawa saboda shiri mai kyau, jigilar kaya mai sauƙi da sauƙin ajiya. Aikin turmi mai rufi na barbashi na EPS ya dogara ne akan nau'in da adadin polymer da aka yi amfani da shi. Foda mai latexr na Ethylene-vinyl acetate (EVA) mai yawan sinadarin ethylene da ƙarancin ƙimar Tg (zafin canjin gilashi) yana da kyakkyawan aiki dangane da ƙarfin tasiri, ƙarfin haɗin gwiwa da juriyar ruwa.
Ingantaccen foda na latex akan aikin turmi ya faru ne saboda gaskiyar cewa foda na latex wani babban polymer ne mai ƙwayoyin halitta tare da ƙungiyoyin polar. Lokacin da aka haɗa foda na latex da ƙwayoyin EPS, ɓangaren da ba polar a cikin babban sarkar polymer na latex zai Shafar jiki zai faru tare da saman EPS mara polar. Ƙungiyoyin polar a cikin polymer suna fuskantar waje a saman ƙwayoyin EPS, don haka ƙwayoyin EPS suna canzawa daga hydrophobicity zuwa hydrophilicity. Saboda gyaggyara saman ƙwayoyin EPS ta foda na latex, yana magance matsalar cewa ƙwayoyin EPS suna fuskantar ruwa cikin sauƙi. Shawagi, matsalar babban layi na turmi. A wannan lokacin, lokacin da aka ƙara siminti da gauraya, ƙungiyoyin polar da ke shaƙa a saman ƙwayoyin EPS suna hulɗa da ƙwayoyin siminti kuma suna haɗuwa sosai, don haka iya aiki na turmi na rufin EPS ya inganta sosai. Wannan yana nuna gaskiyar cewa ƙwayoyin EPS suna jika su cikin sauƙi ta hanyar manna siminti, kuma ƙarfin haɗin da ke tsakanin su biyun yana inganta sosai.
Emulsion da foda mai sake fashewa na latex na iya samar da ƙarfi mai ƙarfi da ƙarfin haɗawa akan kayan aiki daban-daban bayan ƙirƙirar fim, ana amfani da su azaman mai ɗaurewa na biyu a cikin turmi don haɗawa da simintin ɗaure mara tsari, siminti da polymer bi da bi Bayar da cikakken wasa ga ƙarfin da ya dace don inganta aikin turmi. Ta hanyar lura da ƙananan tsarin kayan haɗin polymer-siminti, ana tsammanin cewa ƙara foda mai sake fashewa na latex na iya sa polymer ya zama fim kuma ya zama wani ɓangare na bangon rami, kuma ya sa turmi ya zama cikakke ta hanyar ƙarfin ciki, wanda ke inganta ƙarfin ciki na turmi. Ƙarfin polymer, ta haka yana inganta matsin lamba na turmi da ƙara matsin lamba na ƙarshe. Don nazarin aikin dogon lokaci na foda mai sake fashewa a cikin turmi, an lura da SEM cewa bayan shekaru 10, ƙananan tsarin polymer a cikin turmi bai canza ba, yana kiyaye haɗin gwiwa mai ƙarfi, ƙarfin lanƙwasa da matsi da kuma kyakkyawan juriyar ruwa. An yi nazarin tsarin samuwar ƙarfin manne na tayal a kan foda mai narkewa, kuma an gano cewa bayan an busar da polymer ɗin ya zama fim, fim ɗin polymer ya samar da haɗin gwiwa mai sassauƙa tsakanin turmi da tayal a gefe ɗaya, kuma a gefe guda, polymer ɗin da ke cikin turmi yana ƙara iskar turmi kuma yana shafar samuwar da danshi na saman, kuma daga baya a lokacin saitin polymer ɗin yana da tasiri mai kyau akan tsarin hydration da raguwar siminti a cikin mahaɗin. Duk waɗannan za su taimaka wajen inganta ƙarfin haɗin.
Ƙara foda mai latex mai sake wargazawa a cikin turmi zai iya inganta ƙarfin haɗin gwiwa da wasu kayan aiki sosai, saboda foda mai latex mai hydrophilic da kuma matakin ruwa na dakatarwar siminti suna shiga cikin ramuka da capillaries na matrix, kuma foda mai latex yana shiga cikin ramuka da capillaries. Fim ɗin ciki yana samuwa kuma yana manne da ƙarfi a saman substrate, don haka yana tabbatar da kyakkyawan ƙarfin haɗin gwiwa tsakanin kayan siminti da substrate.
Lokacin Saƙo: Maris-09-2023