EPS turmi insulation wani abu ne mai nauyi mai nauyi wanda aka yi ta hanyar haɗa abubuwan haɗin inorganic, masu ɗaure kwayoyin halitta, abubuwan haɗawa, ƙari da tara haske a cikin wani ƙayyadadden rabo. Daga cikin EPS barbashi rufi turmi halin yanzu karatu da kuma amfani, redispersible latex foda yana da mafi girma tasiri a kan yi na turmi, lissafi ga wani babban rabo daga cikin kudin, kuma ya kasance kullum mayar da hankali a hankali. Ayyukan haɗin gwiwa na EPS barbashi insulation turmi na waje tsarin rufin bango yafi fito ne daga polymer daure, wanda akasari ya ƙunshi vinyl acetate/etylene copolymers. Fesa bushewa na irin wannan nau'in emulsion na polymer na iya haifar da redispersible latex foda. Redispersible latex foda ya zama ci gaban ci gaba a cikin gine-gine saboda ainihin shirye-shiryensa, dacewa da sufuri da sauƙin ajiya. Ayyukan EPS turmi insulation sun dogara da yawa akan nau'in da adadin polymer da aka yi amfani da su. Ethylene-vinyl acetate foda (EVA) tare da babban abun ciki na ethylene da ƙananan Tg (gilashin zafin jiki) yana da kyakkyawan aiki a cikin ƙarfin tasiri, ƙarfin haɗin gwiwa da juriya na ruwa.
Redispersible polymer foda ne fari, yana da kyau fluidity, yana da uniform barbashi size bayan redispersion, kuma yana da kyau dispersibility. Bayan hadawa da ruwa, da latex foda barbashi iya komawa zuwa ga asali emulsion jihar da kuma kula da halaye da kuma ayyuka a matsayin Organic m. Matsayin redispersible polymer foda a cikin thermal rufi turmi ana sarrafawa ta hanyoyi biyu: ciminti hydration da polymer foda samuwar fim. An kammala tsarin samar da tsarin tsarin siminti hydration da polymer foda samuwar fim ɗin ta matakai huɗu masu zuwa:
(1) Lokacin da latex foda aka gauraye da siminti turmi, da tarwatsa lafiya polymer barbashi suna ko'ina tarwatsa a cikin slurry.
(2) Gel na siminti a hankali yana samuwa a cikin polymer / manna siminti ta hanyar hydration na siminti, lokaci na ruwa yana cike da calcium hydroxide da aka kafa a lokacin aikin hydration, kuma ana ajiye kwayoyin polymer a wani ɓangare na saman simintin gel / unhydrated. cakuda siminti.
(3) Yayin da tsarin simintin gel ɗin ya haɓaka, ana cinye ruwa kuma ana ɗaukar ƙwayoyin polymer a hankali a cikin capillaries. Yayin da ciminti ya ƙara yin hydrates, ruwan da ke cikin capillaries yana raguwa kuma ƙwayoyin polymer suna taruwa a saman simintin gel / unhydrated simintin barbashi da kuma haɗaɗɗen haske, suna samar da Layer mai ci gaba da tam. A wannan lokaci, manyan pores suna cike da ƙwanƙwasa ko ƙwayar polymer mai ɗaci.
(4) A karkashin aikin ciminti hydration, tushe sha da surface evaporation, da danshi abun ciki ne kara rage, da kuma polymer barbashi tam stacked a kan ciminti hydrate tara a cikin wani ci gaba da fim, bonding da hydration kayayyakin tare da samar da wani cikakken cibiyar sadarwa tsarin. , kuma lokaci na polymer yana tsaka-tsaki a ko'ina cikin siminti hydration slurry.
Siminti hydration da latex foda fim-forming abun da ke ciki samar da wani sabon hadadden tsarin, da kuma hade da tasiri inganta da kuma inganta aikin na thermal rufi turmi.
Tasirin ƙarar foda na polymer akan ƙarfin turmi mai ƙarfi na thermal
Maɗaukaki mai sassauƙa sosai kuma mai ƙarfi na polymer mesh membrane da aka samar ta hanyar latex foda yana inganta aikin turmi mai rufin zafi sosai, musamman ƙarfin ɗaure yana inganta sosai. Lokacin da aka yi amfani da ƙarfin waje, abin da ya faru na ƙananan ƙwayoyin cuta zai zama raguwa ko raguwa saboda haɓakar haɗin kai na gaba ɗaya da kuma elasticity na polymer.
Ƙarfin ƙwanƙwasa na turmi mai ƙyalli na thermal yana ƙaruwa tare da karuwar abun ciki na polymer foda; Ƙarfin ƙwanƙwasa da ƙarfin matsawa yana raguwa zuwa wani matsayi tare da karuwar abun ciki na latex foda, amma har yanzu yana iya saduwa da bukatun bango na waje na ado. Ƙaƙwalwar matsawa yana da ƙananan ƙananan, wanda ke nuna cewa turmi mai rufi na thermal yana da kyakkyawan sassauci da aikin nakasa.
Babban dalilan da ya sa foda polymer ya inganta ƙarfin ƙarfi shine: a lokacin coagulation da hardening tsari na turmi, da polymer zai gel da kuma samar da wani fim a cikin sauyi yankin tsakanin EPS barbashi da ciminti manna, yin mu'amala tsakanin biyu denser da karfi; wani ɓangare na polymer yana tarwatsewa a cikin simintin siminti kuma an sanya shi cikin fim a saman simintin hydrate gel don samar da hanyar sadarwa ta polymer. Wannan ƙananan hanyar sadarwa na polymer na roba yana inganta ƙarfin siminti mai taurin; Wasu ƙungiyoyin polar a cikin ƙwayoyin polymer na iya amsawa ta hanyar sinadarai tare da samfuran hydration na siminti don samar da tasirin haɗin gwiwa na musamman, ta haka inganta tsarin jiki na samfuran hydration na siminti da rage damuwa na ciki, don haka rage haɓakar ƙwayoyin microcracks a cikin man siminti.
Tasirin sashi na polymer foda wanda za'a iya rarrabawa akan aikin aiki na turmi insulation na EPS
Tare da karuwar adadin latex foda sashi, haɗin kai da riƙewar ruwa suna inganta sosai, kuma an inganta aikin aiki. Lokacin da adadin ya kai 2.5%, zai iya cika bukatun ginin. Idan adadin ya yi yawa, dankon turmi na EPS thermal insulation ya yi yawa kuma yawan ruwa ya ragu, wanda bai dace da ginin ba, kuma farashin turmi yana ƙaruwa.
Dalilin da ya sa polymer foda yana inganta aikin aiki na turmi shi ne cewa polymer foda shine babban ƙwayar kwayoyin halitta tare da kungiyoyin polar. Lokacin da aka haɗu da foda na polymer tare da ƙwayoyin EPS, sassan da ba na polar ba a cikin babban sarkar polymer foda za su yi hulɗa tare da sassan EPS. Adsorption na jiki yana faruwa akan farfajiyar EPS mara iyaka. Ƙungiyoyin polar da ke cikin polymer suna fuskantar waje a saman sassan EPS, suna sa sassan EPS su canza daga hydrophobic zuwa hydrophilic. Saboda gyare-gyaren sakamako na latex foda a saman sassan EPS, an warware matsalar cewa ƙwayoyin EPS suna da sauƙi ga ruwa. Matsalar yin iyo da manyan turmi. Lokacin da aka ƙara siminti da haɗewa a wannan lokacin, ƙungiyoyin polar suna tallatawa a saman ɓangarorin EPS suna hulɗa tare da siminti kuma an haɗa su sosai, ta haka yana inganta haɓaka aikin turmi na EPS. Wannan yana nunawa a cikin gaskiyar cewa ƙwayoyin EPS suna sauƙin jika ta hanyar siminti slurry, kuma ƙarfin haɗin gwiwa tsakanin su biyu yana inganta sosai.
Redispersible polymer foda ne makawa bangaren na high-yi EPS barbashi rufi slurry. Tsarin aikinsa shine galibi cewa ƙwayoyin polymer a cikin tsarin suna tarawa cikin fim mai ci gaba, suna haɗa samfuran hydration na siminti tare don samar da cikakkiyar tsarin cibiyar sadarwa da ƙarfi tare da barbashi EPS. A hadaddun tsarin redispersible polymer foda da sauran binders yana da kyau taushi na roba sakamako, wanda ƙwarai inganta bonding ƙarfi ƙarfi da yi na EPS barbashi rufi turmi.
Lokacin aikawa: Dec-30-2024