Njengohlobo lwezinto zomlotha wentaba-mlilo, i-metakaolin yindawo entle kakhulu endaweni yesamente ngenxa yokusebenzisa kwayo amandla aphantsi kunye nongcoliseko oluphantsi lokusingqongileyo ngexesha lenkqubo ye-calcination, kunye nokukwazi kwayo ukuphucula iipropati ezithile zesamente yasePortland, njengokuqina nokuqina, xa yenziwe isamente exutyiweyo. Kwiminyaka yakutshanje, izazi ezininzi zizinikele ekufundeni umsebenzi womlotha wentaba-mlilo we-kaolin. Eli nqaku lichaza ubushushu obufanelekileyo be-calcination kunye nexesha le-kaolin, izinto ezichaphazela umsebenzi wayo, kunye neendlela zokufumanisa iipropati kunye nomsebenzi we-kaolin. Izifundo zangaphambili zibonise ukuba ubushushu obufanelekileyo be-calcination kunye nexesha le-kaolin ziphenjelelwa zizinto ezifana nokwakheka kwezimbiwa, i-crystallinity, kunye nomxholo we-kaolin, phakathi kwazo i-crystallinity yesakhiwo se-kaolin inempembelelo enkulu kumsebenzi wayo emva kwe-calcination. I-XRD, i-TG-DTA, i-IR kunye nezinye iindlela zasetyenziswa ukuhlalutya iipropati ze-ore eluhlaza. Umsebenzi we-kaolin wamiselwa ngeendlela ezifana novavanyo lwe-Frantini, uvavanyo lokuqhuba, kunye ne-strength activity index. Iindlela ezichanekileyo yayiluvavanyo lwe-Frantini kunye ne-strength activity index test.
I-Metakaolin (efinyeziweyo njenge-MK) yi-anhydrous aluminium silicate (Al2O3 • 2SiO2, AS2) eyenziwe kukuphelelwa ngamanzi kwe-kaolin (Al2O3 • 2SiO2 • 2 H2O, AS2H2) kubushushu obufanelekileyo (600-900 ℃). I-Kaolin ikwisakhiwo se-silicate esineengqimba, kwaye iingqimba zibotshelelwe zii-van der Waals bonds, kunye nee-OH-ions ezibotshelelwe ngaphakathi kuyo. Xa i-kaolin ifudunyezwa emoyeni, idlula kwiinguqu ezininzi zesakhiwo. Xa ifudunyezwa ukuya kuthi ga kwi-600 ℃, isakhiwo esineengqimba se-kaolin siyatshatyalaliswa ngenxa yokuphelelwa ngamanzi, okwenza isigaba sokutshintsha esine-crystallinity embi - metakaolin.
Ngenxa yokulungelelaniswa okungacwangciswanga kweemolekyuli ze-metakaolin, ibonisa imeko yokuguquguquka kwe-thermodynamic kwaye ibonisa iipropati zokubumba phantsi koxinzelelo olufanelekileyo. I-Metakaolin yinto esebenzayo kakhulu yolwelo lwentaba-mlilo enokusabela kwi-Ca (OH) 2 (CH) kunye namanzi ukuvelisa iimveliso zokubumba ezifana nesamente. Ngokusebenzisa olu phawu, xa lusetyenziswa njengomxube wesamente, lunokusabela kwi-CH eveliswa ngexesha lenkqubo yokubumba isamente, enokuphucula iipropati ezithile zesamente.
I-Metakaolin (MK) yimveliso eyenziwe kukuphelelwa ngamanzi emzimbeni kwe-kaolin kubushushu obuphezulu, kwaye ubushushu be-calcination bunokuchaphazela umsebenzi wemveliso.
Xa ubushushu bunyuka ngaphezu kwama-950 ℃, imveliso iqala ukunyibilika ize iguquke ibe yi-mullite kunye ne-cristobalite,
Iya kulahlekelwa ngumsebenzi wayo wokufumana amanzi emzimbeni.
I-kaolin ekhaltsiweyo sisixhobo sokuzalisa esingadalwanga esisetyenziswa kakhulu kwishishini lokuvelisa izinto zepolymer ezifana nerabha, iplastiki, kunye neengubo. Inganciphisa iindleko zezi mveliso, ingakumbi ukuphucula iimpawu zomzimba nezekhemikhali zezinto.