Redispersible latex foda abu ne da aka saba amfani da shi na gelling.Foda ce da aka samu ta hanyar fesa-bushewar emulsion polymer tare da barasa na polyvinyl azaman colloid mai karewa.Ana iya rarraba wannan foda a cikin ruwa daidai da ruwa bayan saduwa da ruwa., forming wani emulsion.Ƙara redispersible latex foda zai iya inganta aikin riƙe ruwa na sabon gauraye siminti turmi, kazalika da aikin haɗin gwiwa, sassauci, rashin ƙarfi da juriya na lalata turmi siminti.
Tasirin foda na latexr akan ƙarfin haɗin kayan tushen siminti
Emulsion da redispersible latex foda na iya samar da high tensile ƙarfi da bonding ƙarfi a kan daban-daban kayan bayan da fim samuwar, ana amfani da su a matsayin na biyu mai ɗaure a turmi don haɗa tare da inorganic daure ciminti, ciminti da polymer bi da bi Ba da cikakken wasa ga daidai ƙarfin don inganta aikin turmi.Ta hanyar lura da microstructure na polymer-cement composite abu, an yi imani da cewa Bugu da kari na redispersible latex foda zai iya sa polymer samar da wani fim da kuma zama wani ɓangare na ramin bango, da kuma sanya turmi ya zama gaba ɗaya ta hanyar ciki karfi. wanda ke inganta ƙarfin ciki na turmi.Ƙarfin polymer, don haka inganta damuwa na rashin ƙarfi na turmi da kuma ƙara ƙimar ƙarshe.An yi nazarin aikin dogon lokaci na foda mai iya tarwatsawa a cikin turmi.An lura da SEM cewa bayan shekaru 10, microstructure na polymer a cikin turmi bai canza ba, kuma an kiyaye kwanciyar hankali, juriya da matsawa.ƙarfi da kyawuwar ruwa.The redispersible latex foda ya yi nazarin tsarin samuwar tayal mai ƙarfi, kuma ya gano cewa bayan an bushe polymer kuma an kafa shi a cikin fim, fim ɗin polymer yana samar da haɗin gwiwa mai sassauƙa tsakanin turmi da tayal a gefe guda, kuma a gefe guda. wani hannun, da sabo turmi A matsakaici polymer ƙara da iska abun ciki na turmi da kuma rinjayar samuwar da wettability na surface, kuma daga baya a lokacin da saitin tsari, da polymer kuma yana da mafi tasiri tasiri a kan hydration tsari da shrinkage na siminti a. mai ɗaure, duk waɗannan za su taimaka wajen inganta ƙarfin haɗin gwiwa.
Ƙara redispersible latex foda zuwa turmi iya muhimmanci inganta bonding ƙarfi da sauran kayan, saboda hydrophilic latex foda da ruwa lokaci na ciminti dakatar shiga cikin pores da capillaries na matrix, da kuma latex foda shiga cikin pores da capillaries. .Fim na ciki an kafa shi kuma yana da tabbaci a kan farfajiyar ƙasa, don haka tabbatar da kyakkyawar haɗin gwiwa tsakanin siminti da kayan aiki.
Ingantaccen foda na latex a kan aikin turmi shine saboda gaskiyar cewa latex foda shine babban ƙwayar kwayoyin halitta tare da kungiyoyin polar.Lokacin da aka haɗu da foda na latex tare da ƙwayoyin EPS, ɓangaren da ba na iyakacin duniya ba a cikin babban sarkar latex foda polymer zai zama tallan jiki na jiki tare da fuskar EPS maras iyaka.Ƙungiyoyin polar a cikin polymer suna fuskantar waje a saman sassan EPS, don haka ƙwayoyin EPS sun canza daga hydrophobicity zuwa hydrophilicity.Saboda gyaggyarawa na farfajiyar EPS ta hanyar latex foda, yana magance matsalar cewa ƙwayoyin EPS suna cikin sauƙin fallasa ruwa.Mai iyo, matsalar manyan yadudduka na turmi.A wannan lokacin, lokacin da aka ƙara siminti da haɗuwa, ƙungiyoyin polar suna tallatawa a saman sassan EPS suna hulɗa tare da barbashi na siminti kuma suna haɗuwa a hankali, ta yadda za a iya inganta aikin turmi na EPS.Wannan yana nunawa a cikin gaskiyar cewa ƙwayoyin EPS suna sauƙin jika ta hanyar manna siminti, kuma ƙarfin haɗin gwiwa tsakanin su biyu yana inganta sosai.
Lokacin aikawa: Maris 14-2023