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 zaɓin kayan siminti, aggregates, aggregates, wakilai masu riƙe ruwa, masu ɗaure, masu gyara aikin gini, da sauransu. Misali, turmi na tushen gypsum yana da kyakkyawan aikin haɗin gwiwa fiye da turmi na tushen ciminti a cikin bushewa, amma aikin haɗin gwiwa yana raguwa. da sauri a ƙarƙashin yanayin shayar da danshi da shayar da ruwa. Ya kamata a rage maƙasudin haɗin gwiwa na plastering turmi Layer ta Layer, wato, ƙarfin haɗin kai tsakanin tushe Layer da wakilin jiyya na dubawa turmi Layer da saman Layer turmi Ƙarfi ≥ Ƙarfin haɗin kai tsakanin turmi da kuma kayan sawa.
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 ginin tushe don ginin turmi yana da wasu shayar da ruwa, bayan da tushe Layer ya sha ruwan da ke cikin turmi, aikin ginin turmi zai lalace, kuma a lokuta masu tsanani, kayan siminti a cikin turmi ba zai cika ruwa ba, sakamakon haka. a cikin ƙarfi, na musamman Dalili shi ne ƙarfin haɗin gwiwa tsakanin turmi mai tauri da tushe na tushe ya zama ƙasa, yana sa turmi ya fashe kuma ya faɗi. 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