Kukho izinto ezininzi ezichaphazela umsebenzi we-fly ash kwaye zinzima kakhulu. Izinto eziphambili zokulawula ziquka: ukubunjwa kweekhemikhali (ikakhulukazi isigaba seglasi); isakhiwo seglasi; iziphene zeekhemikhali kunye nenyama yendawo yokuvula kwiglasi (kubandakanywa nezo ziveliswa ngokusila); amanzi Indima ye-chemical reaction medium; Ukuhanjiswa kobungakanani bamasuntswana. Okukhona iinkqubo ezininzi kumgca wemveliso yothuthu lwempukane, kokukhona uthuthu lwempukane luveliswa kakuhle, kwaye kokukhona linyuka ixabiso lothuthu lwempukane. Kodwa ngokubanzi, inokwahlulwa ibe ngamacandelo amabini; enye ikhemikhali, eyona nto ibandakanya inani kunye nokubunjwa kwezinto ezisebenzayo ezithatha inxaxheba kunye nokukhuthaza ukuphendula kwe-pozzolanic; enye yeyomzimba, echaphazela kakhulu inkqubo ye-hydration kunye nokuqina kwesamente Isakhiwo selitye le-samente lenziwe kamva.
1. Imiba yemichiza
Ekubeni isigaba seglasi ye-silica-alumina ngowona mthombo womsebenzi webhabha uthuthu , izinto ezinciphisa inani lemizimba yeglasi, njengelahleko enkulu ekutshiseni kunye nezigaba ezininzi ze-crystalline, azikho kakuhle kumsebenzi. Ukongezelela, ekubunjweni kwesigaba seglasi, iindima zezinto ezahlukeneyo azifani. Iioksidi zezona nxalenye zixhaphakileyo kwibhabha uthuthu , kwaye zikwayinxalenye ephambili yeemveliso ze-hydration. Nangona kunjalo, phantsi kobudala obuhlukeneyo kunye neemeko zobushushu, iqondo kunye nokubaluleka kweeoksidi ezithatha inxaxheba kwiimpendulo ze-hydration zahlukile. Umzekelo, intsimbi inokunciphisa indawo yokunyibilika komlotha, nto leyo eyenza kube lula ukubunjwa kwe-glass microbeads. Nangona kunjalo, ngenxa yokuba i-iron oxide inesakhono esibi kakhulu sokuthatha inxaxheba kwiimpendulo ze-hydration, ngokubanzi kukholelwa ukuba umxholo we-iron oxide ogqithisileyo awulungele ukusebenza; isixa esincinci se-alkali metal oxides sinokukhuthaza ukuhanjiswa kwamanzi. Ukusabela kuqhutyelwa, kodwa xa usebenzisa i-aggregate esebenzayo, umxholo ophezulu we-potassium kunye ne-sodium oxides kwi-fly ash iya kukhuthaza ukusabela kwe-alkaline aggregate, ngaloo ndlela itshabalalisa ukuzinza kwekhonkrithi; isixa esincinci sesulfure trioxide kuthuthu lwempukane Iluncedo ekubunjweni kwe-hydrated calcium silicate kunye nokwakheka kwe-hydrated calcium sulfoaluminate (ettringite) enegalelo kumandla okuqala, kodwa ukwandiswa kwe-ettringite kakhulu kuya kubangela iingxaki zokuzinza komthamo, ngoko ke umxholo wesulphur trioxide akufanele ube phezulu kwi-3%.
2. Izinto eziphathekayo
Izinto eziphambili ezichaphazela umsebenzi we-fly ash yi-particle morphology, i-microstructure kunye nezinye izinto ezibonakalayo. Kwiindidi ezahlukeneyo zomlotha wempukane, encinci imfuno yamanzi yokuhambelana okusemgangathweni, umsebenzi ophezulu; i-carbon content ephantsi, iphezulu umsebenzi; incinci i-fineness, iphezulu umsebenzi; ngokwemigaqo ye-particle morphology, iglasi engqukuva kwi-fly ash Okukhona, uphezulu umsebenzi we-fly ash. Ukusuka kwi-microstructure uphawu E, ibhabha uthuthunge-short-chain silicon-oxygen tetrahedral structure inomsebenzi ophezulu.
Indawo ethile yomphezulu wothuthu lwempukane inokubonakalisa ukubunjwa kwamasuntswana kunye nesakhiwo sothuthu lwempukane kwinqanaba elithile. Amasuntswana acolekileyo othuthu lwempukane anommandla othile omkhulu ngakumbi; umzimba weglasi otyebileyo we-calcium unesakhiwo esixineneyo kunye nendawo encinci ehambelanayo yendawo ethile; kukho imizimba yeglasi emininzi enemingxuma. Imingxunya, indawo ehambelanayo yendawo ethile inkulu.
Ixesha lokuposa: Mar-15-2022