Simintin Fly Ash na Portland

Simintin Portland
Tokar kwari Simintin Portland yana nufin haɗuwar simintin Portland clinker da tokar tashi, wanda aka haɗa da adadin gypsum mai dacewa sannan aka niƙa, wanda aka sanya masa suna PF Duk wani abu mai amfani da simintin hydraulic wanda aka yi da simintin Portland clinker, tokar tashi da kuma adadin ƙasa mai dacewa da gypsum ana kiransa da tokar tashi Simintin Portland, wanda aka sanya masa suna PF Adadin tokar tashi da aka ƙara wa simintin shine 20% ~ 40% ta nauyi, kuma ƙarfinsa da buƙatun ƙarfi a kowane zamani iri ɗaya ne da na simintin Portland slag.

Albarkatun kasa
An yi shi ne da simintin Portland clinker kuma tokar kwari, a gauraya da adadin gypsum mai dacewa sannan a niƙa. Lambar PF
Duk wani abu mai amfani da siminti mai amfani da ruwa wanda aka yi da simintin Portland clinker, tosh ɗin tashi da kuma isasshen adadin ƙasa na gypsum ana kiransa dash ɗin tashi. Simintin Portland, wanda aka sanya masa suna PF. Adadin tokar tashi da aka ƙara wa simintin shine kashi 20% zuwa 40% ta hanyar nauyi. An yarda ya shiga cikin slag ɗin tanda mai ƙarfi wanda ba zai wuce kashi 1/3 na jimlar kayan gauraye ba. A wannan lokacin, jimlar kayan gauraye na iya kaiwa kashi 50%, amma adadin tokar tashi bai kamata ya zama ƙasa da kashi 20% ko fiye da kashi 40% ba.
Siffofi
Tsarin simintin tokar tashi yana da ɗan kauri, yankin saman ciki ƙarami ne, kuma ƙarfin sha ruwa ya yi ƙasa sosai, kuma buƙatar ruwa don ruwan siminti ƙarami ne, don haka busasshen raguwar simintin tokar tashi ƙarami ne, kuma juriyar tsagewa ma ƙasa ce. Yana da kyau. Bugu da ƙari, kamar simintin gabaɗaya da aka haɗa da kayan haɗin da ke aiki, yana da ƙarancin zafi da kuma juriyar tsagewa mai ƙarfi.
Aiki
Abubuwan da ke cikin siminti na Portland ash sune kamar haka:
(1) Ƙarfin farko yana da ƙasa, kuma ƙimar ƙaruwar ƙarfi ta ƙarshe tana da girma: ƙarfin farko na simintin tokar tashi yana da ƙasa, kuma ƙarfin farko yana raguwa sosai tare da ƙaruwar adadin tokar tashi. Saboda jikin vitreous a cikin tokar tashi yana da ƙarfi sosai, ƙwayoyin tokar tashi suna lalacewa kuma suna lalata su a hankali ta hanyar Ca(OH)2 yayin aikin ruwa na simintin tokar tashi, don haka ci gaban ƙarfin simintin tokar tashi galibi yana bayyana ne a matakin ƙarshe. , ƙimar ƙaruwar ƙarfi ta ƙarshe tana da girma, kuma har ma tana iya wuce ƙarfin ƙarshen simintin Portland da ya dace.
(2) Kyakkyawan aiki da ƙananan raguwar bushewa: Saboda yawancin barbashin tokar ƙura a rufe suke kuma suna da ƙarfi mai siffar ƙwallo, kuma yankin saman ciki da ruwan sha na ƙwayoyin halitta guda ɗaya ƙanana ne, simintin tokar ƙura yana da kyakkyawan aiki da ƙaramin raguwar bushewa., yana da halaye na ƙarfin tauri mai yawa da kuma juriya mai kyau ga fashewa. Wannan fa'ida ce bayyananniya ta simintin tokar ƙura.
(3) Kyakkyawan juriya ga tsatsa: simintin tokar kwari yana da juriya ga tsatsa ga ruwan sabo da sulfate. Saboda haɗuwar SiO2 mai aiki a cikin tokar kwari da Ca(OH)2, ana samar da sinadarin calcium silicate hydrate lokacin da aka daidaita shi. Matsakaicin adadin da ake buƙata (watau alkalinity na lokaci-lokaci na ruwa) ya yi ƙasa da wanda ake buƙata don daidaiton sinadarin calcium silicate hydrate a cikin simintin Portland na yau da kullun, don haka ƙimar fitar da ruwa a cikin ruwan sabo yana raguwa sosai, ta haka yana inganta juriyar siminti. Ikon tsatsa na ruwa sabo da juriya ga lalacewar sulfate.
(4) Ƙarancin zafin ruwa: Saurin ruwan da simintin tokar kwari ke yi yana da jinkiri kuma zafin ruwan yana da ƙasa, musamman idan adadin tokar kwari da aka ƙara ya yi yawa, raguwar zafin ruwan yana da matuƙar bayyana.

Simintin Portland
Duk wani siminti na Portland wanda aka yi da sinadarin calcium silicate, dutse mai laushi ko kuma granulated blast slag mai ƙasa da kashi 5%, da kuma kayan siminti na hydraulic da aka yi da gypsum da aka niƙa sosai ana kiransu da simintin Portland. An fi sanin su a duniya da Portland Siminti.
Rarrabawa
An raba simintin Portland zuwa nau'i biyu, nau'in simintin Portland na I wanda ba shi da kayan gauraye ana kiransa simintin Portland, lambar P·I; kayan gauraye da aka yi da dutse mai laushi ko kuma slag ɗin tanda mai ƙarfi wanda bai wuce kashi 5% na nauyin siminti ba ana kiransa da II Type Portland siminti, lambar P·Ⅱ.
Haɗin ma'adinai
Babban sinadarin ma'adinai na simintin Portland shine: tricalcium silicate, dicalcium silicate, tricalcium aluminate, da tetracalcium ferric aluminate. Tricalcium silicate yana ƙayyade ƙarfin simintin Portland cikin makonni huɗu; dicalcium silicate yana yin ƙarfinsa ne kawai bayan makonni huɗu, kuma yana kaiwa ga ƙarfin simintin tricalcium na tsawon makonni huɗu cikin kimanin shekara guda; ƙarfin simintin tricalcium aluminate Yana aiki da sauri, amma ƙarfin yana da ƙasa, kuma yana taka rawa a cikin ƙarfin simintin Portland cikin kwana 1 zuwa 3 ko ɗan lokaci kaɗan; Ƙarfin simintin gishirin acid ƙarami ne.