Hydroxypropyl methylcellulose (HPMC) galibi yana taka rawar riƙewar ruwa, haɓakawa da haɓaka aikin gini a cikin siminti, gypsum da sauran kayan foda. Kyakkyawan aikin riƙewar ruwa zai iya hana foda daga bushewa da fashe saboda asarar ruwa mai yawa, kuma ya sa foda ya sami lokaci mai tsawo.
Aiwatar da zaɓi na siminti kayan aiki, aggregates, aggregates, ruwa retaining agents, binders, gina yi gyare-gyare, da dai sauransu Alal misali, gypsum tushen turmi yana da mafi kyau bonding fiye da siminti tushen turmi a cikin bushe jihar, amma da bonding yi rage sauri a karkashin yanayin da danshi sha da ruwa sha. The manufa bonding ƙarfi na plastering turmi ya kamata a rage Layer ta Layer, wato, bonding ƙarfi tsakanin tushe Layer da dubawa magani wakili ≥ da bonding ƙarfi tsakanin tushe Layer turmi da dubawa magani wakili ≥ bond tsakanin tushe Layer turmi da surface Layer turmi ƙarfi
Manufar hydration manufa na ciminti turmi a kan tushe shi ne cewa siminti hydration samfurin sha ruwa tare da tushe, shiga cikin tushe, da kuma samar da wani tasiri "maɓalli mahada" tare da tushe, don cimma da ake bukata ƙarfin bond. Shayarwa kai tsaye a saman tushe zai haifar da mummunar tarwatsewa a cikin shayar da ruwa na tushe saboda bambance-bambancen yanayin zafi, lokacin shayarwa, da daidaiton ruwa. Tushen yana da ƙarancin sha ruwa kuma zai ci gaba da sha ruwan a cikin turmi. Kafin ci gaba da ciminti hydration, ruwan yana sha, wanda ke shafar simintin hydration da shigar da samfuran ruwa a cikin matrix; tushe yana da babban shayar ruwa, kuma ruwan da ke cikin turmi yana gudana zuwa tushe. Matsakaicin gudun hijira yana jinkirin, har ma an samar da ruwa mai wadataccen ruwa tsakanin turmi da matrix, wanda kuma yana shafar ƙarfin haɗin gwiwa. Sabili da haka, yin amfani da hanyar shayarwa na yau da kullum ba kawai zai kasa magance matsalar yawan shayar da ruwa na bango ba, amma zai shafi ƙarfin haɗin kai tsakanin turmi da tushe, wanda zai haifar da raguwa da raguwa.
Tasirin ether cellulose akan ƙarfin matsawa da ƙarfi na turmi siminti.
Tare da ƙari na ether cellulose, ƙarfin matsawa da ƙarfi yana raguwa, saboda ether cellulose yana sha ruwa kuma yana ƙara porosity.
Ayyukan haɗin kai da ƙarfin haɗin kai sun dogara ne akan ko haɗin kai tsakanin turmi da kayan tushe na iya kasancewa da ƙarfi kuma ingantaccen "haɗin maɓalli" na dogon lokaci.
Abubuwan da ke shafar ƙarfin haɗin gwiwa sun haɗa da:
1. Halayen shayarwar ruwa da roughness na substrate dubawa.
2. Ƙarfin ajiyar ruwa, ƙarfin shiga da ƙarfin tsarin turmi.
3. Kayan aikin gini, hanyoyin gini da yanayin gini.
Saboda tushe Layer na turmi gini yana da wani ruwa sha, bayan tushe Layer sha ruwan a cikin turmi, da constructability na turmi za a lalace, kuma a cikin tsanani lokuta, simintious abu a cikin turmi ba za a cikakken hydrated, sakamakon da ƙarfi, musamman dalilin shi ne cewa interface ƙarfi tsakanin taurare turmi da tushe Layer ya zama ƙasa, to fadowa turmi. Maganin gargajiya na waɗannan matsalolin shine shayar da tushe, amma ba zai yiwu ba a tabbatar da cewa tushen yana da danshi daidai.
Lokacin aikawa: Mayu-06-2023