EPS granular thermal insulation turmi wani abu ne mai nauyi mai kauri wanda aka haɗe da inorganic binder, Organic binder, admixture, admixture and light agregate in a partition. A cikin bincike na yanzu da aikace-aikace na EPS barbashi rufi turmi, da recyclable redispersible latex foda yana da babban tasiri a kan yi na turmi kuma ya mamaye wani in mun gwada da high rabo a cikin kudin, don haka shi ne ko da yaushe mayar da hankali da hankali. A bonding yi na EPS barbashi thermal insulation turmi na waje bango rufi tsarin yafi fito daga polymer daure, da kuma bangaren shi ne mafi vinyl acetate/etylene copolymer. Irin wannan nau'in emulsion na polymer ana iya fesa-bushe don samun foda mai sake tarwatsawa. Saboda daidaitattun shirye-shiryen redispersible latex foda a cikin ginin, sufuri mai dacewa da ajiya mai dacewa, foda maras kyau ga polymers ya zama yanayin ci gaba saboda ainihin shirye-shiryensa, sufuri mai dacewa da ajiya mai dacewa. Ayyukan EPS turmi insulation sun dogara da yawa akan nau'in da adadin polymer da aka yi amfani da su. Ethylene-vinyl acetate latex foda (EVA) tare da babban abun ciki na ethylene da ƙananan Tg (gilashin zafin jiki) yana da mafi kyawun kaddarorin dangane da ƙarfin tasiri, ƙarfin haɗin gwiwa da juriya na ruwa.
Haɓakawa na aikin redispersible latex foda akan turmi shine saboda gaskiyar cewa polymer foda shine babban ƙwayar ƙwayar ƙwayar cuta tare da ƙungiyoyin polar. Lokacin da aka haɗu da RDP tare da ƙwayoyin EPS, ɓangaren da ba na iyakacin duniya ba a cikin babban sarkar polymer foda zai yi amfani da jiki tare da yanayin da ba na polar ba na EPS. 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-gyare na farfajiyar EPS ta hanyar foda na polymer, an warware matsalar da kwayoyin EPS suke da sauƙin saduwa da ruwa. iyo, manyan matsaloli na turmi delamination. A wannan lokacin, lokacin ƙara siminti da motsawa, ƙungiyoyin polar suna tallatawa a saman ɓangarorin EPS suna hulɗa tare da barbashi na siminti kuma suna haɗuwa a hankali, wanda ke haɓaka haɓakar 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.
Bayan emulsion da redispersible latex foda aka kafa a cikin wani fim, za su iya samar da mafi girma tensile ƙarfi da bonding ƙarfi a kan daban-daban kayan. Ana amfani da su azaman mai ɗaure na biyu a cikin turmi don haɗawa tare da siminti, siminti da polymer bi da bi. Kunna ƙarfin da ya dace kuma inganta aikin turmi. Ta hanyar lura da microstructure na polymer-cement composite abu, an yi la'akari da cewa ƙari na redispersible latex foda zai iya sa polymer film ya zama wani ɓangare na ramin bango, da kuma sanya turmi ya zama gaba ɗaya ta hanyar ciki karfi, wanda inganta ciki. karfin turmi. Ƙarfin polymer, ta haka yana ƙara gajiyar rashin ƙarfi na turmi da kuma ƙara ƙarfin ƙarshe. Don nazarin dogon lokaci yi na redispersible latex foda a turmi, lura da Ana dubawa electron microscope, bayan shekaru 10, da microstructure na polymer a cikin turmi bai canza ba, rike barga bonding, flexural ƙarfi da matsawa ƙarfi kazalika da kyau Hydrophobic. . Ɗaukar foda mai sake tarwatsawa a matsayin abin bincike, an yi nazarin tsarin samar da ƙarfin haɗin tayal, kuma an gano cewa bayan da aka bushe polymer ɗin ya zama fim, fim ɗin polymer ya kafa alaƙa mai sassauƙa tsakanin turmi da tayal a gefe guda. , kuma a daya hannun, The polymers a cikin turmi ƙara da iska abun ciki na turmi, shafi flatness da wettability na surface, sa'an nan a lokacin da saitin tsari, da polymers kuma suna da m sakamako a kan hydration tsari da shrinkage na siminti. Adhesives, waɗannan duk suna taimakawa wajen ƙara ƙarfin haɗin gwiwa.
Ƙara redispersible latex foda zuwa turmi iya muhimmanci inganta bonding ƙarfi da sauran kayan, saboda ruwa lokaci na hydrophilic polymer foda da ciminti dakatar ratsa cikin pores da capillaries na matrix, yayin da latex foda ratsa cikin pores da kuma A cikin. capillary. Fim na ciki an kafa shi kuma yana da tabbaci a kan farfajiyar ƙasa, don haka tabbatar da kyakkyawar haɗin gwiwa tsakanin kayan gelled da substrate.
Lokacin aikawa: Juni-16-2023