I-1) Ukuthuthukisa amandla odaka lukasimende nodaka kungenye yezimpawu zokusebenza okuphezulu kokhonkolo.Enye yezinjongo eziyinhloko zokwengeza i-metakaolin ukuthuthukisa amandla odaka lukasimende nokhonkolo.

U-Poon et al, Amandla ayo ku-28d no-90d alingana nawesimende we-metakaolin, kodwa amandla ayo okuqala aphansi kunosimende wokuqhathanisa.Ukuhlaziywa kuphakamisa ukuthi lokhu kungase kuhlotshaniswe ne-agglomeration enzima ye-silicon powder esetshenzisiwe kanye nokuhlakazeka okwanele ku-slurry kasimende.

(2) U-Li Keliang et al.(2005) ifunde imiphumela yezinga lokushisa lokubala, isikhathi sokubala, kanye nokuqukethwe kwe-SiO2 ne-A12O3 ku-kaolin kumsebenzi we-metakaolin ukuze kuthuthukiswe amandla kakhonkolo usimende.Ukhonkolo onamandla aphezulu kanye nama-polymer enhlabathi alungiswa kusetshenziswa i-metakaolin.Imiphumela ibonisa ukuthi lapho okuqukethwe kwe-metakaolin kungu-15% futhi isilinganiso sikasimende samanzi singu-0.4, amandla okucindezela ezinsukwini ezingu-28 angama-71.9 MPa.Uma okuqukethwe kwe-metakaolin kungu-10% futhi isilinganiso sikasimende wamanzi singu-0.375, amandla okucindezela ezinsukwini ezingu-28 ngu-73.9 MPa.Ngaphezu kwalokho, lapho okuqukethwe kwe-metakaolin kungu-10%, inkomba yayo yomsebenzi ifinyelela ku-114, okuyi-11.8% ephakeme kunesamba esifanayo se-silicon powder.Ngakho-ke, kukholelwa ukuthi i-metakaolin ingasetshenziswa ukulungisa ukhonkolo wamandla aphezulu.

Ubudlelwano be-axial tensile stress-strain bukakhonkolo no-0, 0.5%, 10%, no-15% okuqukethwe kwe-metakaolin kwafundwa.Kwatholakala ukuthi ngokwanda kokuqukethwe kwe-metakaolin, uhlobo oluphakeme lwamandla e-axial tensile kakhonkolo lwanda kakhulu, futhi i-tensile elastic modulus yahlala ingashintshile.Kodwa-ke, amandla acindezelayo kakhonkolo anda kakhulu, kuyilapho isilinganiso samandla esicindezelayo sincipha ngokufanayo.Amandla aqinile namandla acindezelayo kakhonkolo onokuqukethwe kwe-kaolin okungu-15% kungu-128% kanye no-184% kakhonkolo oyinkomba, ngokulandelana.
Lapho kufundwa umphumela oqiniswayo we-ultrafine powder ye-metakaolin kukhonkolo, kwatholakala ukuthi ngaphansi koketshezi olufanayo, amandla acindezelayo namandla aguquguqukayo odaka oluqukethe i-10% metakaolin anyuke ngo-6% kuya ku-8% ngemuva kwezinsuku ezingama-28.Ukuthuthukiswa kwamandla okuqala kukakhonkolo oxutshwe ne-metakaolin kwakushesha kakhulu kunokhonkolo ojwayelekile.Uma kuqhathaniswa nokhonkolo we-benchmark, ukhonkolo oqukethe u-15% we-metakaolin unokunyuka okungama-84% kumandla okucindezela i-axial ye-3D kanye nokwanda okungama-80% kumandla okucindezela ama-axial angu-28d, kuyilapho i-static elastic modulus inokwenyuka okungu-9% ku-3D kanye nokwenyuka okungu-8%. ngo 28d.

Umthelela wengxenye exubile yenhlabathi ye-metakaolin kanye ne-slag emandleni nokuqina kukakhonkolo kwafundwa.Imiphumela ibonisa ukuthi ukwengeza i-metakaolin kukhonkolo we-slag kuthuthukisa amandla nokuqina kukakhonkolo, futhi isilinganiso esifanele se-slag kusimende sizungeze u-3: 7, okuholela emandleni okhonkolo afanelekile.Umehluko omkhulu kakhonkolo oyinhlanganisela uphakeme kancane kunokhonkolo we-slag eyodwa ngenxa yomphumela womlotha wentaba-mlilo we-metakaolin.Amandla ayo aqinile ahlukanisayo aphakeme kunalawo okhonkolo webhentshimakhi.

Ukusebenza, amandla acindezelayo, nokuqina kukakhonkolo kwahlolisiswa kusetshenziswa i-metakaolin, umlotha wempukane, ne-slag njengemiselela usimende, futhi kuxutshwa i-metakaolin nomlotha wezimpukane kanye ne-slag ngokuhlukana ukuze kulungiswe ukhonkolo.Imiphumela ibonisa ukuthi lapho i-metakaolin ithatha indawo ka-5% kuya ku-25% usimende ngamanani alinganayo, amandla okucindezela kakhonkolo kuyo yonke iminyaka ayathuthukiswa;Lapho i-metakaolin isetshenziswa esikhundleni sikasimende ngo-20% ngenani elilinganayo, amandla okucindezela eminyakeni yobudala afanelekile, futhi amandla ayo ku-3d, 7d, no-28d angu-26.0%, 14.3%, kanye no-8.9% ngaphezu kwalawo kakhonkolo ngaphandle kwe-metakaolin. wanezela, ngokulandelana.Lokhu kubonisa ukuthi ku-Type II Portland usimende, ukwengeza i-metakaolin kungathuthukisa amandla kakhonkolo olungisiwe.

Ukusebenzisa i-steel slag, i-metakaolin, nezinye izinto njengezinto zokusetshenziswa eziyinhloko ukulungisa usimende we-geopolymer esikhundleni sikasimende wendabuko wase-Portland, ukuze kuzuzwe umgomo wokongiwa kwamandla, ukunciphisa ukusetshenziswa, kanye nokuguqula imfucuza ibe umcebo.Imiphumela ibonisa ukuthi lapho okuqukethwe kwensimbi ne-fly ash kokubili ku-20%, amandla ebhulokhi yokuhlola ezinsukwini ezingu-28 afinyelela phezulu kakhulu (95.5MPa).Njengoba inani le-steel slag eyengeziwe likhuphuka, lingadlala indima ethile ekwehliseni ukushwabana kukasimende we-geopolymer.

Kusetshenziswa umzila wezobuchwepheshe "we-Portland Cement+active mineral admixture+high-efficiency high-efficiency water reduceing agent", ubuchwepheshe bukakhonkolo bamanzi obudonsa ngozibuthe, kanye nezinqubo ezijwayelekile zokulungisa, kwenziwa ucwaningo ekulungiseni ukhonkolo we-slag wetshe elinekhabhoni ephansi kanye namandla aphezulu kakhulu kusetshenziswa. izinto zokusetshenziswa ezifana namatshe kanye slag kusukela anhlobonhlobo imithombo yendawo.Imiphumela ikhombisa ukuthi umthamo ofanele we-metakaolin ngu-10%.Isilinganiso sesisindo namandla somnikelo kasimende ngeyunithi ngayinye yesisindo sokhonkolo we-slag wamandla aphezulu sicishe sibe izikhathi ezingu-4.17 kunokhonkolo ojwayelekile, izikhathi ezingu-2.49 kunokhonkolo wamandla aphezulu (HSC), kanye nezikhathi ezingu-2.02 zokhonkolo oyimpushana osebenzayo (RPC ).Ngakho-ke, ukhonkolo we-slag wamandla aphezulu kakhulu olungiselelwe ngosimende wesilinganiso esiphansi kuwukuqondiswa kokuthuthukiswa kokhonkolo enkathini yomnotho wekhabhoni ephansi.

(3) Ngemva kokwengeza i-kaolin ekwazi ukumelana nesithwathwa kukhonkolo, ubukhulu bembotshana kakhonkolo buyancipha kakhulu, okwenza ngcono umjikelezo wokuqandisa ukhonkolo.Ngaphansi kwenombolo ethile yemijikelezo yokuncibilika kokuqhwaza, i-elastic modulus yesampula likakhonkolo enokuqukethwe kwe-kaolin engu-15% ezinsukwini ezingama-28 ubudala iphakeme kakhulu kunaleyo yokhonkolo oyinkomba ezinsukwini ezingama-28 ubudala.Ukusetshenziswa kwenhlanganisela ye-metakaolin namanye ama-powder amaminerali e-ultrafine kukhonkolo kungathuthukisa kakhulu ukuqina kukakhonkolo.