1) Inganta ƙarfin slurry siminti da turmi yana ɗaya daga cikin alamomin babban aikin siminti.Ɗaya daga cikin manyan dalilan ƙara metakaolin shine don inganta ƙarfin turmi da kankare.

Poon et al, Ƙarfin sa a 28d da 90d daidai yake da na siminti na metakaolin, amma ƙarfinsa na farko ya yi ƙasa da siminti.Bincike ya nuna cewa wannan na iya kasancewa yana da alaƙa da tsananin ƙaranci na foda na siliki da aka yi amfani da shi da rashin isasshen watsawa a cikin slurry na siminti.

(2) Li Keliang et al.(2005) yayi nazarin tasirin zafin ƙima, lokacin ƙididdigewa, da abun ciki na SiO2 da A12O3 a cikin kaolin akan ayyukan metakaolin don haɓaka ƙarfin siminti.An shirya simintin ƙarfi mai ƙarfi da polymers na ƙasa ta amfani da metakaolin.Sakamakon ya nuna cewa lokacin da abun ciki na metakaolin ya kasance 15% kuma rabon siminti na ruwa shine 0.4, ƙarfin matsawa a cikin kwanaki 28 shine 71.9 MPa.Lokacin da abun ciki na metakaolin shine 10% kuma rabon siminti na ruwa shine 0.375, ƙarfin matsawa a cikin kwanaki 28 shine 73.9 MPa.Bugu da ƙari, lokacin da abun ciki na metakaolin ya kasance 10%, ma'anar ayyukansa ya kai 114, wanda shine 11.8% mafi girma fiye da adadin silicon foda.Sabili da haka, an yi imani cewa ana iya amfani da metakaolin don shirya siminti mai ƙarfi.

Dangantakar danniya-dangi na kankare tare da 0, 0.5%, 10%, da 15% metakaolin abun ciki an yi nazari.An gano cewa tare da karuwar abun ciki na metakaolin, kololuwar karfin jumhuriyar axial na siminti ya karu sosai, kuma madaidaicin na roba ya kasance baya canzawa.Duk da haka, da matsawa ƙarfi na kankare muhimmanci ya karu, yayin da matsawa ƙarfi rabo daidai rage.Ƙarfin jujjuyawar ƙarfi da ƙarfi na kankare tare da abun ciki na kaolin 15% shine 128% da 184% na simintin magana, bi da bi.
Lokacin nazarin tasirin ultrafine foda na metakaolin akan kankare, an gano cewa a ƙarƙashin ruwa guda ɗaya, ƙarfin matsawa da ƙarfi na turmi mai ɗauke da 10% metakaolin ya karu da 6% zuwa 8% bayan kwanaki 28.Ƙarfin farko na ci gaban kankare gauraye da metakaolin ya yi sauri fiye da na daidaitaccen siminti.Idan aka kwatanta da simintin ma'auni, simintin da ke ɗauke da 15% metakaolin yana da haɓaka 84% a cikin ƙarfin matsawa na axial na 3D da haɓaka 80% a cikin ƙarfin matsawa na axial na 28d, yayin da madaidaicin madaidaicin modulus yana da haɓaka 9% a cikin 3D da haɓaka 8%. ku 28d.

An yi nazarin tasirin gauraye na ƙasa metakaolin da slag akan ƙarfi da dorewar siminti.Sakamakon ya nuna cewa ƙara metakaolin zuwa slag kankare yana inganta ƙarfi da dorewa na siminti, kuma mafi kyawun rabo na slag zuwa siminti yana kusa da 3: 7, yana haifar da ingantaccen ƙarfin kankare.Bambancin bambamcin simintin da aka haɗa ya ɗan sama sama da na simintin slag guda ɗaya saboda tasirin toka mai aman wuta na metakaolin.Ƙarfin jujjuyawar sa ya fi na simintin ma'auni.

An yi nazarin iya aiki, ƙarfin matsawa, da dorewar siminti ta hanyar amfani da metakaolin, ash, da slag a madadin siminti, da haɗa metakaolin tare da ash gardama daban don shirya kankare.Sakamakon ya nuna cewa lokacin da metakaolin ya maye gurbin 5% zuwa 25% ciminti a daidai adadin, ƙarfin damfara na kankare a kowane zamani yana inganta;Lokacin da ake amfani da metakaolin don maye gurbin siminti da kashi 20 cikin 100 daidai gwargwado, ƙarfin matsawa a kowane shekaru yana da kyau, kuma ƙarfinsa a 3d, 7d, da 28d shine 26.0%, 14.3%, da 8.9% sama da na kankare ba tare da metakaolin ba. kara, bi da bi.Wannan yana nuna cewa don siminti na II Portland, ƙara metakaolin zai iya inganta ƙarfin siminti da aka shirya.

Yin amfani da siminti na karfe, metakaolin, da sauran kayan a matsayin manyan albarkatun kasa don shirya siminti na geopolymer maimakon simintin Portland na gargajiya, don cimma burin kiyaye makamashi, rage amfani, da mai da sharar gida ta zama taska.Sakamakon ya nuna cewa lokacin da abun ciki na karfe da ash ya kasance duka 20%, ƙarfin gwajin gwajin a cikin kwanaki 28 ya kai sosai (95.5MPa).Yayin da adadin karfen da aka kara da shi yana karuwa, zai iya taka muhimmiyar rawa wajen rage raguwar simintin geopolymer.

Amfani da fasaha hanya na "Portland ciminti + aiki ma'adinai admixture + high-inganci ruwa rage wakili", magnetized ruwa kankare fasahar, da kuma na al'ada shirye-shirye matakai, gwaje-gwaje da aka gudanar a kan shirye-shiryen da low-carbon da matsananci-high ƙarfi dutse slag kankare ta yin amfani da albarkatun kasa irin su duwatsu da slag daga wurare masu yawa na gida.Sakamakon ya nuna cewa adadin da ya dace na metakaolin shine 10%.Matsakaicin adadin gudummawar siminti a kowace naúrar babban ƙarfin dutse slag kankare kusan sau 4.17 na siminti na yau da kullun, sau 2.49 na siminti mai ƙarfi (HSC), kuma sau 2.02 na simintin foda mai amsawa (RPC) ).Saboda haka, matsananci-high ƙarfi dutse slag kankare shirya tare da low sashi ciminti ne shugabanci na kankare ci gaba a cikin low-carbon tattalin arziki zamanin.

(3) Bayan ƙara kaolin tare da juriya na sanyi zuwa kankare, girman pore na simintin yana raguwa sosai, yana haɓaka daskarewa-narkewar simintin.Ƙarƙashin ƙayyadaddun adadin daskarewa-narkewar hawan keke, ƙirar roba na samfurin kankare tare da abun ciki na kaolin 15% a cikin kwanakin 28 yana da girma fiye da na simintin tunani a cikin kwanakin 28.Haɗaɗɗen aikace-aikacen metakaolin da sauran foda na ultrafine na ma'adinai a cikin kankare kuma na iya haɓaka ƙarfin siminti sosai.