Matsalolin foda da aka cire

De-powdering da whitening na ciki bango putty foda a halin yanzu mafi na kowa matsaloli bayan putty yi. Don gane dalilai na ciki bango putty foda de-powdering, dole ne a farko fahimtar ainihin albarkatun kasa aka gyara da kuma curing ka'idojin ciki bango putty foda, sa'an nan kuma hada A lokacin putty yi, da bushewar bango surface, ruwa sha kudi, zazzabi. , bushewar yanayi, da dai sauransu, gano manyan dalilan da ke haifar da zubar da foda na foda a kan bangon ciki kuma yi amfani da hanyar da ta dace don magance matsalar ɗigon foda na ƙwayar foda.

Ainihin albarkatun kasa abun da ke ciki na ciki bango putty foda:

Abubuwan da aka fi amfani da su na cikin bangon putty foda sun haɗa da: kayan haɗin gwiwar inorganic (ash calcium), fillers (nauyin calcium foda, talcum foda, da dai sauransu) polymer Additives (HPMC, polyvinyl barasa, roba foda, da dai sauransu.)

Daga cikin su, ciki bango putty foda gaba ɗaya baya ƙara farin siminti ko kawai ƙara ƙaramin adadin farin siminti. Redispersible latex foda yana da ɗan tasiri a cikin yanayin ƙananan sashi, don haka ba a yi amfani da shi a cikin bangon bango na ciki ba saboda farashi, ko kuma ba a yi amfani da shi ba.

Saboda haka, saboda matsalar da ciki bango putty foda dabara kanta:

1. Abubuwan haɗin da ba a haɗa su ba, kamar ƙari na ash calcium yana da ƙasa da yawa, kuma ingancin ash calcium bai kai daidai ba;

2. Idan adadin haɗin haɗin gwiwa a cikin ƙari na polymer ya yi ƙasa sosai ko kuma ingancin bai dace ba, zai iya sa foda a kan bangon ciki ya fadi.

An raba shi zuwa bangarori masu zuwa:

01. Ƙarfin mannewa na putty bai isa ya haifar da cire foda ba. Mai sana'anta yana rage farashi a makance. Ƙarfin mannewa na foda na roba ba shi da kyau kuma adadin ƙarawa kaɗan ne, musamman ga bangon ciki na ciki. Ingancin foda na roba da manne yana da alaƙa da adadin da aka ƙara.

02. Tsarin ƙira ba shi da ma'ana, matsalar zaɓin kayan abu da tsari suna da mahimmanci a cikin tsarin sakawa. Misali, ana amfani da hydroxypropyl methylcellulose (HPMC) azaman abin sanyawa mara ruwa ga bangon ciki. Ko da yake HPMC yana da tsada sosai, amma ba ya aiki ga abubuwan da ake amfani da su kamar su foda mai tashi biyu, talcum powder, wollastonite powder, da dai sauransu. Idan aka yi amfani da HPMC kawai, zai haifar da delamination. Duk da haka, CMC da CMS masu rahusa ba sa cire foda, amma CMC da CMS ba za a iya amfani da su azaman putty mai hana ruwa ba, kuma ba za a iya amfani da su azaman bangon bango na waje ba, saboda CMC da CMS suna amsawa da foda na calcium mai launin toka da farin siminti, wanda zai haifar da shi. delamination. Akwai kuma polyacrylamides da aka saka a cikin lemun tsami foda da farin siminti a matsayin suturar ruwa, wanda kuma zai haifar da halayen sinadarai don haifar da cire foda.

03. Haɗuwa mara daidaituwa da motsawa shine babban dalilin cire foda na putty akan bangon ciki da na waje. Wasu masana'antun a cikin ƙasa suna samar da foda mai ɗorewa tare da kayan aiki masu sauƙi da daban-daban. Ba kayan aikin hadawa na musamman ba ne, kuma hada-hadar da ba ta dace ba tana haifar da cirewar foda.

04. Kuskuren a cikin tsarin samarwa yana haifar da putty don zama foda. Idan mahaɗin mahaɗin ba shi da aikin tsaftacewa kuma akwai ƙarin ragowar, CMC a cikin talakawan putty zai amsa tare da ash calcium foda a cikin sa mai hana ruwa. CMC, CMS da Farin siminti na bangon bangon waje yana amsawa kuma yana haifar da lalata foda. Wasu na’urori na musamman na wasu kamfanoni suna da tashar tsaftar ruwa, wanda ke iya tsaftace ragowar na’urar, ba wai don tabbatar da ingancin na’urar ba, har ma da yin amfani da na’ura guda don abubuwa da yawa, da kuma siyan kayan aiki guda ɗaya don kera iri-iri. saka.

05. Ingancin filler kuma yana da sauƙin haifar da de-powdering. Ana amfani da babban adadin fillers a ciki da kuma na waje bango putty, amma abun ciki na Ca2CO3 a nauyi alli foda da talc foda a wurare daban-daban ne daban-daban, da kuma bambanci a pH zai haifar da de-powdering na putty, kamar Chongqing da kuma Chengdu na ciki bangon sa yana amfani da foda na roba iri ɗaya, amma talcum foda da ƙwayar calcium mai nauyi sun bambanta. Ba ya cire foda a Chongqing, amma yana lalata foda a Chengdu. Ba ya cire foda a Henan da arewa maso gabashin kasar Sin, amma yana debo foda a wasu yankunan.

06. Dalilin yanayi kuma shine dalilin cire foda na putty akan bangon ciki da waje. Misali, abin da ke jikin bangon ciki da na waje yana da busasshen yanayi da kuma samun iska mai kyau a wasu miyagu a arewa. Wasu yankuna suna da yanayin ruwan sama, zafi na dogon lokaci, abubuwan samar da fina-finai na putty ba su da kyau, kuma zai rasa foda, don haka wasu wuraren sun dace da putty mai hana ruwa tare da ash foda foda.

07. Inorganic binders kamar launin toka calcium foda da farin siminti ba su da najasa kuma sun ƙunshi babban adadin Shuangfei foda. Abin da ake kira Multi-functional gray calcium foda da farar siminti masu aiki da yawa a kasuwa ba su da najasa, saboda ana amfani da adadi mai yawa na waɗannan ƙazantattun abubuwan haɗin inorganic, kuma abin da ba ya hana ruwa daga bangon ciki da waje ba shakka ba zai zama foda ba. kuma ba mai hana ruwa ba.

08. A lokacin rani, ajiyar ruwa na putty a bangon waje bai isa ba, musamman ma a cikin yanayin zafi mai zafi da kuma wuraren da ke da iska kamar manyan ƙofofi da tagogi. Lokacin saitin farko na ash calcium foda da siminti bai isa ba, kuma ruwan zai rasa. Idan ba a kiyaye shi da kyau ba, kuma za a yi masa foda da gaske.