HPMC (hydroxypropyl methylcellulose) wani ƙari ne na polymer multifunctional wanda aka yadu ana amfani dashi a cikin kayan gini, musamman a cikin kayan tushen siminti. Gabatarwar HPMC na iya haɓaka aikin kayan aikin siminti sosai, gami da haɓaka juriya, haɓaka aiki da sarrafa tsarin hydration, ta yadda ya kamata rage abin da ya faru na fatattaka.
Chemical da kaddarorin jiki na HPMC
HPMC sinadari ce ta sinadarai da aka gyara daga cellulose. Tsarin kwayoyin halittarsa ya hada da abubuwan maye gurbin methyl da hydroxypropyl, yana ba shi solubility na musamman, kauri, riƙewar ruwa da abubuwan ƙirƙirar fim. Babban fasalinsa sun haɗa da:
Babban riƙewar ruwa: HPMC yana da kyakkyawan ƙarfin riƙe ruwa kuma yana iya samar da fim ɗin riƙe ruwa a cikin kayan don rage ƙazantaccen ruwa.
Tasiri mai kauri: HPMC na iya haɓaka danko na slurry sosai, don haka inganta aikin sa.
Abubuwan da ke samar da fina-finai: Kyakkyawan ikon yin fim ɗin na iya samar da fim mai sauƙi a saman kayan, yana ba da ƙarin kariya ta jiki.
Hanyoyin tasiri na HPMC akan fashewar kayan da aka yi da siminti
1. Riƙewar ruwa da rage busassun bushewa
Kayayyakin siminti suna fuskantar raguwar girma a lokacin taurare, da farko saboda asarar ruwa da bushewar bushewa saboda halayen hydration. bushewar bushewa yawanci ana haifar da shi ne sakamakon saurin ƙawancen ruwa a cikin slurry na siminti yayin aikin taurin, yana haifar da raguwar girma mara daidaituwa, wanda ke haifar da tsagewa. Abubuwan kiyaye ruwa na HPMC suna taka muhimmiyar rawa a cikin wannan:
Yana rage ƙawancewar ruwa: HPMC yana riƙe da ɗanshi a cikin slurry na siminti, don haka yana rage yawan ƙawancen ruwa. Wannan sakamako na riƙewar ruwa ba wai kawai yana taimakawa wajen tsawaita lokacin amsawar hydration ba, amma kuma yana rage bushewar bushewa wanda ya haifar da ƙawancen ruwa.
Halin hydration na Uniform: Tun da HPMC yana ba da ingantaccen yanayin ruwa, barbashi siminti na iya samun ƙarin yumɓu da isassun halayen hydration, rage bambance-bambancen damuwa na ciki da rage haɗarin fashewar bushewa.
2. Inganta danko da rarraba daidaitattun kayan
HPMC yana da sakamako mai kauri, wanda ke taka muhimmiyar rawa wajen haɓaka aiki da daidaituwar kayan tushen ciminti:
Ƙara danko: HPMC yana ƙara danko na slurry, inganta aikin aiki yayin aikace-aikacen, ƙyale slurry ya gudana mafi kyau kuma ya cika gyare-gyare ko fasa, rage ɓarna da wuraren da ba daidai ba.
Rarraba Uniform: Ta hanyar haɓaka danko na slurry, HPMC yana sanya rarraba filaye da zaruruwa a cikin slurry har ma, yana haifar da tsarin cikin gida guda ɗaya yayin aiwatar da taurin kai da rage fatattaka saboda matsananciyar damuwa.
3. Haɓaka kaddarorin samar da fina-finai da kariya ta ƙasa
Abubuwan da ke samar da fina-finai na HPMC suna taimakawa wajen samar da kariya mai kariya a saman kayan, wanda ke da tasiri mai kyau akan rage fashe:
Kariyar sararin samaniya: Fim ɗin fim mai sassauƙa da aka kafa ta HPMC a saman kayan zai iya kare farfajiyar daga yashwa ta yanayin waje da kuma asarar danshi mai saurin gaske, ta haka yana rage faruwar fashewar saman.
M ɗaukar hoto: Wannan Layer na fim ɗin yana da ɗanɗano kaɗan na sassauƙa kuma yana iya ɗaukar ɓangaren damuwa yayin ɗan nakasawa, don haka hana ko rage raguwar faɗaɗa fasa.
4. Daidaita tsarin hydration
HPMC na iya tsara tsarin hydration na siminti, wanda ke taka muhimmiyar rawa wajen rage yawan damuwa da rashin isasshen ruwa ya haifar:
Sakin ruwa a hankali: HPMC na iya rage saurin hydration dauki, yana barin ruwan da ke cikin slurry siminti ya fito a hankali, ta haka yana samar da yanayi mai daidaituwa da dorewar yanayin ruwa. Wannan sakamako na jinkirin sakin yana rage yawan damuwa da ke haifar da rashin daidaituwar halayen hydration, don haka rage haɗarin fashewa.
Misalan aikace-aikacen HPMC a cikin kayan tushen siminti daban-daban
Ana amfani da HPMC sosai a cikin kayan tushen siminti, gami da amma ba'a iyakance ga benaye masu daidaita kai ba, rufin bango na waje, turmi da kayan gyaran kankare. Wadannan su ne wasu takamaiman misalan aikace-aikacen:
1. Kayayyakin bene mai daidaita kai
Kayayyakin bene masu daidaita kai suna buƙatar ingantaccen ruwa da kaddarorin haɗin kai yayin guje wa fashewar ƙasa. HPMC inganta kwarara da surface gama na abu ta hanyar da thickening da ruwa riƙe effects yayin da rage abin da ya faru na surface fasa.
2. Fentin bango na waje
Fenti na waje yana buƙatar mannewa mai kyau da juriya. The film-forming Properties da ruwa riƙewa na HPMC inganta shafi ta adhesion da sassauci, game da shi inganta shafi ta tsaga juriya da weatherability.
3. Kayan gyare-gyare
Kayan gyare-gyare na kankare yana buƙatar ƙarfin ƙarfi da saurin ƙarfi yayin kiyaye ƙarancin bushewa. HPMC yana ba da kyakkyawar riƙewar ruwa da ikon sarrafa hydration, yana ba da damar kayan gyaran gyare-gyare don kula da ƙananan bushewar bushewa a lokacin aikin hardening kuma rage haɗarin fashewa bayan gyarawa.
Kariya don amfani da HPMC
Ko da yake HPMC yana da tasiri mai mahimmanci wajen rage fashe kayan tushen siminti, har yanzu ana buƙatar lura da waɗannan abubuwan yayin amfani:
Ikon sashi: Adadin HPMC yakamata ya kasance daidai da buƙatun dabara. Da yawa ko kadan zai shafi aikin kayan aiki. Gabaɗaya magana, sashi yana tsakanin 0.1% - 0.5%.
Haɗin Haɗawa: HPMC yana buƙatar haɗawa sosai tare da sauran kayan don tabbatar da yana aiki a cikin slurry.
Yanayin gini: Yanayin gini (kamar zafin jiki, zafi) shima yana da tasiri akan tasirin HPMC, kuma yakamata a daidaita shi daidai gwargwadon takamaiman yanayi.
A matsayin ingantaccen siminti kayan ƙari, HPMC tana taka muhimmiyar rawa wajen rage fashewar kayan da ake amfani da su na siminti ta hanyar riƙewar ruwa na musamman, kauri, ƙirƙirar fim da kaddarorin sarrafa ruwa. Yana jinkirta fitar da ruwa, yana inganta daidaiton kayan, yana kare saman kayan, kuma yana daidaita tsarin hydration, ta haka yana rage haɗarin fashewa. Sabili da haka, a cikin aikace-aikacen kayan da aka yi da siminti, yin amfani da hankali na HPMC ba zai iya inganta aikin kayan kawai ba, amma har ma ya kara tsawon rayuwar sabis da rage farashin kulawa.
Lokacin aikawa: Yuni-26-2024