Menene aikin wakili mai riƙe ruwa gauraye cikin kayan foda na gypsum?
Amsa: Ana amfani da plastering gypsum, bonded gypsum, caulking gypsum, gypsum putty da sauran kayan aikin foda na gini.Don sauƙaƙe gini, ana ƙara gypsum retarders yayin samarwa don tsawaita lokacin ginin gypsum slurry.Ana ƙara retarder don hana tsarin hydration na gypsum hemihydrate.Irin wannan slurry na gypsum yana buƙatar a ajiye shi a bango na tsawon sa'o'i 1 zuwa 2 kafin ya taso, kuma yawancin ganuwar suna da kaddarorin shayar da ruwa, musamman bangon bulo, da bangon Concrete na iska, allunan rufewa da sauran sassa masu nauyi. kayan bango, don haka gypsum slurry ya kamata a kiyaye ruwa don hana wani ɓangare na ruwa a cikin slurry daga canjawa zuwa bango, sakamakon rashin ruwa lokacin da gypsum slurry ya taurare da rashin isasshen ruwa.Gaba ɗaya, haifar da rabuwa da harsashi na haɗin gwiwa tsakanin filastar da bangon bango.Bugu da ƙari na wakili mai kula da ruwa shine don kula da danshin da ke cikin gypsum slurry, don tabbatar da yanayin hydration na gypsum slurry a cikin dubawa, don tabbatar da ƙarfin haɗin gwiwa.Abubuwan da aka saba amfani da su na ruwa sune ethers cellulose, irin su: methyl cellulose (MC), hydroxypropyl methyl cellulose (HPMC), hydroxyethyl methyl cellulose (HEMC), da dai sauransu. Bugu da ƙari, polyvinyl barasa, sodium alginate, modified sitaci, diatomaceous ƙasa. Hakanan ana iya amfani da foda mai ƙarancin ƙasa, da sauransu don haɓaka aikin riƙe ruwa.
Ko da wane nau'in wakili mai riƙe da ruwa zai iya jinkirta ƙimar hydration na gypsum zuwa digiri daban-daban, lokacin da adadin retarder ya kasance baya canzawa, wakilin mai riƙe da ruwa na iya jinkirta saitin na tsawon mintuna 15-30.Sabili da haka, ana iya rage adadin retarder yadda ya kamata.
Menene madaidaicin sashi na wakili mai riƙe da ruwa a cikin kayan foda na gypsum?
Amsa: Sau da yawa ana amfani da abubuwa masu riƙe da ruwa a cikin kayan aikin foda kamar filasta gypsum, gypsum bonding, gypsum caulking, da gypsum putty.Saboda irin wannan nau'in gypsum yana haɗuwa tare da retarder, wanda ke hana tsarin hydration na hemihydrate gypsum, wajibi ne a gudanar da maganin hana ruwa a kan gypsum slurry don hana wani ɓangare na ruwa a cikin slurry daga canjawa zuwa bango, sakamakon haka. karancin ruwa da rashin cika ruwa lokacin da gypsum slurry ya taurare.Bugu da ƙari na wakili mai kula da ruwa shine don kula da danshin da ke cikin gypsum slurry, don tabbatar da yanayin hydration na gypsum slurry a cikin dubawa, don tabbatar da ƙarfin haɗin gwiwa.
Matsakaicin sa shine gabaɗaya 0.1% zuwa 0.2% (lissafin gypsum), lokacin da ake amfani da gypsum slurry akan bango tare da shayar da ruwa mai ƙarfi (kamar aerated kankare, allon rufewa na perlite, tubalan gypsum, bangon bulo, da sauransu), da Lokacin shirya haɗin gwiwa. gypsum, caulking gypsum, gypsum plastering gypsum ko ɓangarorin ɓangarorin bakin ciki, adadin mai riƙe da ruwa yana buƙatar zama babba (gaba ɗaya 0.2% zuwa 0.5%).
Abubuwan da ke riƙe da ruwa irin su methyl cellulose (MC) da hydroxypropyl methylcellulose (HPMC) suna da sanyi-mai narkewa, amma za su haifar da kullu a matakin farko lokacin da aka narkar da su kai tsaye a cikin ruwa.Dole ne a haɗa wakili mai kula da ruwa tare da gypsum foda don watsawa.Shirya cikin busassun foda;ƙara ruwa da motsawa, bari tsaya na minti 5, sake motsawa, tasirin ya fi kyau.Duk da haka, a halin yanzu akwai samfuran ether cellulose waɗanda za a iya narkar da su kai tsaye a cikin ruwa, amma ba su da wani tasiri a kan samar da busassun busassun turmi.
Ta yaya wakili mai hana ruwa ke yin aikin hana ruwa a cikin gypsum mai taurin jiki?
Amsa: Daban-daban nau'ikan masu hana ruwa suna aiwatar da aikinsu na hana ruwa a cikin gypsum mai taurin jiki gwargwadon yanayin aiki daban-daban.Ainihin ana iya taƙaita su cikin hanyoyi huɗu masu zuwa:
(1) Rage solubility na gypsum taurare jiki, ƙara taushi coefficient, da kuma partially maida calcium sulfate dihydrate tare da babban solubility a cikin taurare jiki zuwa calcium gishiri tare da low solubility.Misali, ana kara saponified roba acid mai dauke da C7-C9, kuma ana kara adadin da ya dace na quicklime da ammonium borate a lokaci guda.
(2) Ƙirƙirar fim ɗin fim mai hana ruwa don toshe kyawawan pores na capillary a cikin jiki mai taurin.Misali, hadewar emulsion na paraffin, emulsion kwalta, rosin emulsion da paraffin-rosin hada emulsion, ingantaccen emulsion na kwalta, da sauransu.
(3) Canza makamashin sararin samaniya na jiki mai tauri, ta yadda kwayoyin ruwa suna cikin yanayin haɗin kai kuma ba za su iya shiga cikin tashoshi na capillary ba.Alal misali, an haɗa nau'o'in ruwan siliki iri-iri, ciki har da mai daban-daban na siliki.
(4) Ta hanyar rufi na waje ko tsomawa don ware ruwa daga nutsewa a cikin tashoshi na capillary na jiki mai taurara, ana iya amfani da nau'ikan ma'aunin hana ruwa na silicone.Silicone na tushen ƙarfi sun fi silicones na tushen ruwa, amma na farko ya sa iskar gas na gypsum taurare jiki ya ƙi.
Ko da yake ana iya amfani da nau'o'in kariya na ruwa daban-daban don inganta kayan aikin gine-gine na gypsum ta hanyoyi daban-daban, gypsum har yanzu kayan gelling ne mai taurin iska, wanda bai dace da yanayin waje ko na dogon lokaci ba, kuma ya dace da mahalli tare da sauyawa. yanayin jika da bushewa.
Menene gyare-gyaren ginin gypsum ta hanyar hana ruwa?
Amsa: Akwai manyan hanyoyi guda biyu na aikin gypsum waterproofing agent: daya shine don ƙara yawan laushi ta hanyar rage narkewa, ɗayan kuma shine rage yawan sha ruwa na kayan gypsum.Kuma rage sha ruwa za a iya yi ta fuskoki biyu.Na daya shi ne kara dankon gypsum mai tauri, wato rage shayar da ruwa na gypsum ta hanyar rage porosity da tsagewar tsari, ta yadda za a inganta juriyar ruwan gypsum.Ɗayan shine ƙara ƙarfin sararin samaniya na gypsum taurare jiki, wato, don rage shayar da ruwa na gypsum ta hanyar sanya saman pore ya zama fim din hydrophobic.
Ma'aikatan hana ruwa da ke rage porosity suna taka rawa ta hanyar toshe ramukan gypsum masu kyau da kuma kara girman jikin gypsum.Akwai nau'o'i masu yawa don rage porosity, kamar: paraffin emulsion, kwalta emulsion, rosin emulsion da paraffin kwalta hada emulsion.Wadannan masu hana ruwa suna da tasiri wajen rage porosity na gypsum a karkashin hanyoyin daidaitawa masu dacewa, amma a lokaci guda, suna da mummunar tasiri akan kayan gypsum.
Mafi yawan abin da ya fi dacewa da ruwa wanda ke canza makamashin sararin samaniya shine silicone.Yana iya shiga tashar jiragen ruwa na kowane rami, canza makamashin saman a cikin wani yanki mai tsayi, don haka canza kusurwar lamba tare da ruwa, sa kwayoyin ruwa suyi taruwa tare don samar da ɗigon ruwa, toshe shigar ruwa, cimma manufar hana ruwa. kuma a lokaci guda kula da Air permeability na plaster.Irin wannan nau'in na'ura mai hana ruwa sun hada da: sodium methyl siliconate, silicone resin, emulsified silicone oil, da dai sauransu. Tabbas, wannan wakili mai hana ruwa yana buƙatar cewa diamita na pores ba zai iya girma ba, kuma a lokaci guda ba zai iya tsayayya ba. shigar da ruwa mai matsa lamba, kuma ba zai iya magance matsalolin hana ruwa na dogon lokaci da matsalolin danshi na samfuran gypsum ba.
Masu bincike na cikin gida suna amfani da hanyar haɗa kayan halitta da kayan da ba a haɗa su ba, wato, bisa ga maganin hana ruwa na emulsion da aka samu ta hanyar haɗin gwiwar polyvinyl barasa da stearic acid, da kuma ƙara dutsen alum, naphthalenesulfonate aldehyde condensate Wani sabon nau'in gypsum composite waterproofing. Ana yin wakili ta hanyar haɗawa da wakili mai hana ruwa gishiri.Za'a iya haɗawa da gypsum composite waterproofing wakili kai tsaye tare da gypsum da ruwa, shiga cikin tsarin crystallization na gypsum, kuma samun sakamako mai kyau na ruwa.
Menene tasirin hanawa na silane mai hana ruwa akan efflorescence a cikin turmi gypsum?
Amsa: (1) Ƙarin wakili na silane mai hana ruwa zai iya rage girman ƙwayar gypsum turmi, kuma matakin hana efflorescence na gypsum turmi yana ƙaruwa tare da karuwar silane a cikin wani yanki.Sakamakon hanawa na silane akan 0.4% silane yana da kyau, kuma tasirinsa na hanawa ya kasance mai tsayi lokacin da adadin ya wuce wannan adadin.
(2) Ƙarin silane ba wai kawai ya samar da wani nau'i na hydrophobic a saman turmi don hana kutsawa na ruwa na waje ba, amma kuma yana rage ƙaura na lye na ciki don samar da efflorescence, wanda ke inganta tasirin hanawa.
(3) Yayin da ƙari na silane yana hana haɓakar ƙura, ba shi da wani mummunan tasiri a kan kayan aikin injiniya na masana'antu ta hanyar gypsum turmi, kuma baya rinjayar samuwar tsarin ciki da ƙarfin ƙarshe na gypsum bushewar masana'antu. -haɗa kayan gini .
Lokacin aikawa: Nuwamba-22-2022