A matsayin babban manne na putty, adadin redispersible latex foda yana da tasiri a kan ƙarfin haɗin gwiwa. ƙara yawan adadin foda mai sake tarwatsawa, 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 an dage shi a kan saman matrix, don haka yana tabbatar da mai kyau. Ƙarfin haɗin kai tsakanin kayan siminti da matrix [4].Lokacin da aka cire putty daga farantin gwaji, 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 kayan dauri a cikin sa, lokacin da ba a ƙara foda mai yuwuwa ba, akwai adadi mai yawa na voids a cikin tsarin, lokacin da aka ƙara redispersible latex foda, da emulsion polymer da aka kafa bayan sake tarwatsawa na iya tarawa cikin Fim a cikin vuyoyin putty, a rufe kurajen da ke cikin tsarin sa, sannan a yi suturar da aka yi da gogewa da gogewa don samar da fim mai yawa a saman bayan bushewa, don haka yadda ya kamata ya hana kutsewar ruwa, yana rage yawan sha ruwa, ta yadda za a inganta shi. juriya na ruwa.Lokacin da sashi na latex foda ya kai 4%, da redispersible latex foda da kuma 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. ya zama santsi tare da karuwar 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 inorganic ba su da cikakkiyar haɗin gwiwa, akwai ɓoyayyen da yawa, kuma ba a rarraba su a ko'ina. don 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 ya. suna da rata, don haka zai iya rage sha ruwa mai ɗorewa.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