Danko shine muhimmin siga na aikin cellulose ether.
Gabaɗaya dai, yawan danko, haka kuma tasirin riƙe ruwa na turmi na gypsum ya fi kyau. Duk da haka, yawan danko, yawan nauyin cellulose ether, da kuma raguwar narkewar sa zai yi mummunan tasiri ga ƙarfi da aikin ginin turmi. Da yawan danko, haka kuma tasirin kauri a turmi, amma ba daidai yake ba.
Yayin da turmi mai laushi ya fi girma, haka turmi mai laushi zai fi ƙanƙanta. A lokacin gini, ana bayyana shi a matsayin mannewa ga abin gogewa da kuma mannewa mai ƙarfi ga substrate. Amma bai taimaka sosai wajen ƙara ƙarfin tsarin turmi mai laushi ba. Bugu da ƙari, a lokacin gini, aikin turmi mai laushi ba a bayyane yake ba. Akasin haka, wasu ethers na matsakaici da ƙarancin ɗanko amma waɗanda aka gyara suna da kyakkyawan aiki wajen inganta ƙarfin tsarin turmi mai laushi.
Kayayyakin bangon gini galibi gine-gine ne masu ramuka, kuma duk suna da ƙarfi wajen shan ruwa. Duk da haka, ana shirya kayan ginin gypsum da ake amfani da su don gina bango ta hanyar ƙara ruwa a bango, kuma bangon yana sha ruwa cikin sauƙi, wanda ke haifar da rashin ruwan da ake buƙata don danshi na gypsum, wanda ke haifar da matsaloli wajen gina siminti da rage ƙarfin haɗin gwiwa, wanda ke haifar da tsagewa. Matsalolin inganci kamar busawa da barewa. Inganta riƙe ruwa na kayan ginin gypsum na iya inganta ingancin gini da ƙarfin haɗin gwiwa tare da bango. Saboda haka, wakilin riƙe ruwa ya zama ɗaya daga cikin mahimman abubuwan haɗin kayan ginin gypsum.
Ana amfani da gypsum mai rufi, gypsum mai ɗaurewa, gypsum mai ɗaurewa, gypsum mai ɗaurewa da sauran kayan foda na gini. Domin sauƙaƙe gini, ana ƙara abubuwan hana ruwa a lokacin samarwa don tsawaita lokacin ginin gypsum slurry. Tunda gypsum ɗin yana haɗuwa da Retarder, wanda ke hana tsarin hydration na hemihydrate gypsum. Wannan nau'in gypsum slurry yana buƙatar a ajiye shi a bango na tsawon awanni 1-2 kafin ya faɗi. Yawancin bangon suna da kaddarorin sha ruwa, musamman bangon tubali da siminti mai iska. Bango, allon rufewa mai ramuka da sauran sabbin kayan bango masu sauƙi, don haka ya kamata a yi maganin riƙe ruwa akan gypsum slurry don guje wa canja wurin wani ɓangare na ruwan a cikin slurry zuwa bango, wanda ke haifar da ƙarancin ruwa da rashin cika ruwa lokacin da slurry ɗin gypsum ya taurare. Yana haifar da rabuwa da barewar haɗin gwiwa tsakanin gypsum da saman bango. Ƙarin wakilin riƙe ruwa shine don kiyaye danshi da ke cikin slurry ɗin gypsum, don tabbatar da amsawar hydration na slurry ɗin gypsum a mahaɗin, don tabbatar da ƙarfin haɗin. Abubuwan da ake amfani da su wajen riƙe ruwa sune cellulose ethers, kamar methyl cellulose (MC), hydroxypropyl methyl cellulose (HPMC), hydroxyethyl methyl cellulose (HEMC), da sauransu. Bugu da ƙari, ana iya amfani da polyvinyl alcohol, sodium alginate, modified sitaci, diatomaceous earth earth powder, da sauransu don inganta aikin riƙe ruwa.
Ko da wane irin sinadarin da ke riƙe ruwa zai iya jinkirta yawan ruwan gypsum zuwa matakai daban-daban, idan adadin sinadarin da ke riƙe ruwa bai canza ba, sinadarin da ke riƙe ruwa zai iya jinkirta yanayin na tsawon mintuna 15-30. Saboda haka, ana iya rage adadin sinadarin da ke riƙe ruwa yadda ya kamata.
Lokacin Saƙo: Fabrairu-08-2023