A matsayin babban manne na putty, adadin redispersible latex foda yana da tasiri a kan ƙarfin haɗin gwiwa na putty.Hoto na 1 yana nuna dangantaka tsakanin adadin foda da aka sake rarrabawa da kuma ƙarfin haɗin gwiwa.Kamar yadda za a iya gani daga Hoto na 1, tare da karuwa da adadin sake rarraba latex foda, ƙarfin haɗin gwiwa ya karu a hankali. Lokacin da adadin latex foda ya kasance ƙananan, ƙarfin haɗin gwiwa yana ƙaruwa tare da ƙara yawan adadin latex foda. Idan sashi na emulsion foda shine 2%, ƙarfin haɗin kai ya kai 0182MPA, wanda ya dace da daidaitattun ƙasa na 0160MPA. Dalilin shi ne cewa hydrophilic latex foda da kuma lokacin ruwa na dakatarwar ciminti ya shiga cikin pores da capillary na matrix, latex foda ya samar da fim a cikin pores da capillaries kuma yana da tabbaci a kan saman matrix, don haka yana tabbatar da kyakkyawar haɗin gwiwa tsakanin kayan siminti da matrix [4]. Lokacin da aka cire putty daga farantin gwajin, ana iya gano cewa karuwar adadin latex foda yana ƙara mannewa na putty zuwa substrate. Duk da haka, lokacin da adadin latex foda ya kasance a kan 4% , karuwar ƙarfin haɗin gwiwa ya ragu. Ba wai kawai redispersible latex foda, amma kuma inorganic kayan kamar siminti da nauyi alli carbonate taimaka wajen bonding ƙarfi na putty.
Juriya na ruwa da juriya na alkali na putty shine muhimmin ma'aunin gwaji don yin hukunci ko za'a iya amfani da putty azaman juriya na ruwa na bangon ciki ko bangon bangon waje. Hoto na 2 yayi bincike game da tasirin adadin foda mai sake tarwatsawa akan juriya na ruwa na putty
Kamar yadda za a iya gani daga Hoto 2, lokacin da adadin latex foda ya kasa da 4%, tare da karuwar adadin latex foda, yawan shayarwar ruwa yana nuna yanayin ƙasa. Lokacin da adadin ya wuce 4%, yawan sha ruwa ya ragu a hankali. Dalilin shi ne cewa siminti shine abin dauri a cikin putty, lokacin da ba a ƙara foda mai ɗigon ruwa ba, akwai adadi mai yawa a cikin tsarin, lokacin da aka ƙara foda mai yuwuwa, polymer emulsion da aka kafa bayan sake tarwatsawa zai iya murƙushewa a cikin fim ɗin a cikin ɓoyayyun putty, rufe ɓoyayyun a cikin tsarin putty, kuma sanya suturar putty ɗin ta zama mai inganci bayan yin fim da bushewa da bushewa. kutsawa, rage yawan sha ruwa, ta yadda zai inganta juriyar ruwansa. Lokacin da sashi na latex foda ya kai 4%, da redispersible latex foda da redispersible polymer emulsion iya m cika voids a cikin putty tsarin gaba daya da kuma samar da cikakken da m fim, ta haka ne, da hali na ragewar ruwa sha na putty zama santsi tare da karuwa da adadin latex foda.
Ta hanyar kwatanta hotunan SEM na putty da aka yi ta ƙara redispersible latex foda ko a'a, ana iya ganin cewa a cikin siffa 3 (a) , kayan da ba su da kyau ba su da cikakkiyar haɗin gwiwa, akwai ɓoyayyen da yawa, kuma ɓoyayyun ba a rarraba su daidai ba, sabili da haka, ƙarfin haɗin kai bai dace ba. Yawancin ɓangarorin da ke cikin tsarin suna sa ruwa ya zama mai sauƙi don kutsawa, don haka yawan sha ruwa ya fi girma. A cikin siffa 3 (b) , da emulsion polymer bayan sake tarwatsa iya m cika voids a cikin putty tsarin da kuma samar da wani cikakken fim, sabõda haka, inorganic abu a cikin dukan putty tsarin za a iya bonded more gaba daya, kuma m ba shi da rata, saboda haka zai iya rage putty ruwa sha. Yin la'akari da tasirin latex foda akan ƙarfin haɗin gwiwa da juriya na ruwa na putty, da kuma la'akari da farashin latex foda, 3% ~ 4% na latex foda ya dace.Kammala sake rarraba latex foda zai iya inganta ƙarfin haɗin gwiwa na putty. Lokacin da sashi shine 3% ~ 4%, putty yana da ƙarfin haɗin gwiwa da ingantaccen juriya na ruwa
Lokacin aikawa: Jul-19-2023