1) Kev txhim kho lub zog ntawm cov cement slurry thiab mortar yog ib qho ntawm cov cim ntawm kev ua haujlwm siab ntawm cov pob zeb.Ib lub hom phiaj tseem ceeb ntawm kev ntxiv metakaolin yog txhawm rau txhim kho lub zog ntawm cov cement mortar thiab pob zeb.

Poon et al, Nws lub zog ntawm 28d thiab 90d yog sib npaug rau cov metakaolin MAAs, tab sis nws lub zog thaum ntxov yog qis dua cov qauv cement.Kev tshuaj xyuas qhia tau hais tias qhov no yuav cuam tshuam nrog kev sib xyaw hnyav ntawm silicon hmoov siv thiab tsis txaus dispersion hauv cov cement slurry.

(2) Li Keliang et al.(2005) tau kawm txog qhov cuam tshuam ntawm calcination kub, calcination lub sij hawm, thiab SiO2 thiab A12O3 cov ntsiab lus hauv kaolin ntawm kev ua ntawm metakaolin los txhim kho lub zog ntawm cov cement pob zeb.Lub zog muaj zog pob zeb thiab cov av polymers tau npaj siv metakaolin.Cov txiaj ntsig tau pom tias thaum cov ntsiab lus ntawm metakaolin yog 15% thiab cov dej cement piv yog 0.4, lub zog compressive ntawm 28 hnub yog 71.9 MPa.Thaum cov ntsiab lus ntawm metakaolin yog 10% thiab cov dej cement piv yog 0.375, lub zog compressive ntawm 28 hnub yog 73.9 MPa.Ntxiv mus, thaum cov ntsiab lus ntawm metakaolin yog 10%, nws qhov Performance index nce mus txog 114, uas yog 11.8% siab dua li tib cov hmoov silicon.Yog li ntawd, nws ntseeg tias metakaolin tuaj yeem siv los npaj cov pob zeb muaj zog.

Lub axial tensile stress-strain kev sib raug zoo ntawm pob zeb nrog 0, 0.5%, 10%, thiab 15% metakaolin cov ntsiab lus tau kawm.Nws tau pom tias nrog kev nce ntawm cov ntsiab lus ntawm cov metakaolin, lub ncov siab ntawm axial tensile lub zog ntawm cov pob zeb tau nce ntxiv, thiab tensile elastic modulus tseem tsis tau hloov pauv.Txawm li cas los xij, lub zog compressive ntawm cov pob zeb tseem ceeb tau nce ntxiv, thaum lub zog compressive piv tau txo qis.Lub zog tensile thiab compressive lub zog ntawm pob zeb nrog 15% kaolin cov ntsiab lus yog 128% thiab 184% ntawm cov pob zeb siv, feem.
Thaum kawm txog kev txhawb zog ntawm cov hmoov ultrafine ntawm metakaolin ntawm cov pob zeb, nws tau pom tias nyob rau hauv tib lub fluidity, lub zog compressive thiab flexural zog ntawm mortar muaj 10% metakaolin nce 6% mus rau 8% tom qab 28 hnub.Kev txhim kho lub zog thaum ntxov ntawm cov pob zeb sib xyaw nrog metakaolin tau nrawm dua li cov qauv pob zeb.Piv nrog rau cov qauv ntsuas, cov pob zeb uas muaj 15% metakaolin muaj 84% nce hauv 3D axial compressive zog thiab 80% nce hauv 28d axial compressive zog, thaum lub zog zoo li qub elastic modulus muaj 9% nce hauv 3D thiab 8% nce. hauv 28d.

Kev cuam tshuam ntawm kev sib xyaw ua ke ntawm metakaolin av thiab slag ntawm lub zog thiab durability ntawm pob zeb tau kawm.Cov txiaj ntsig tau pom tias ntxiv cov metakaolin rau slag pob zeb txhim kho lub zog thiab kav ntev ntawm cov pob zeb, thiab qhov kev pom zoo ntawm slag rau cement yog nyob ib ncig ntawm 3: 7, ua rau lub zog zoo tagnrho.Qhov sib txawv ntawm qhov sib txawv ntawm cov pob zeb sib xyaw yog me ntsis siab dua li ntawm ib qho slag pob zeb vim cov volcanic tshauv ntawm metakaolin.Nws qhov sib cais tensile lub zog yog siab dua li ntawm cov qauv kev ua vaj tse.

Kev ua haujlwm, compressive zog, thiab durability ntawm cov pob zeb tau kawm los ntawm kev siv cov tshuaj metakaolin, ya tshauv, thiab slag los hloov cov cement, thiab sib tov metakaolin nrog ya tshauv thiab slag cais los npaj pob zeb.Cov txiaj ntsig tau pom tias thaum metakaolin hloov 5% mus rau 25% cement hauv qhov sib npaug, lub zog compressive ntawm pob zeb ntawm txhua lub hnub nyoog yog txhim kho;Thaum metakaolin siv los hloov cov cement los ntawm 20% hauv qhov sib npaug, lub zog compressive ntawm txhua lub hnub nyoog yog qhov zoo tagnrho, thiab nws lub zog ntawm 3d, 7d, thiab 28d yog 26.0%, 14.3%, thiab 8.9% siab dua li cov pob zeb tsis muaj metakaolin. ntxiv, feem.Qhov no qhia tau hais tias rau Hom II Portland cement, ntxiv metakaolin tuaj yeem txhim kho lub zog ntawm cov pob zeb npaj.

Siv steel slag, metakaolin, thiab lwm yam ntaub ntawv los ua cov ntaub ntawv tseem ceeb los npaj geopolymer cement es tsis txhob ntawm Portland cement, kom ua tiav lub hom phiaj ntawm kev txuag hluav taws xob, txo kev noj, thiab tig pov tseg rau hauv cov khoom muaj nqis.Cov txiaj ntsig tau pom tias thaum cov ntsiab lus ntawm cov hlau thiab cov tshauv ya ya yog ob qho tib si 20%, lub zog ntawm qhov kev sim thaiv ntawm 28 hnub nce siab heev (95.5MPa).Raws li tus nqi ntawm cov hlau slag ntxiv nce, nws tuaj yeem ua lub luag haujlwm qee yam hauv kev txo cov shrinkage ntawm geopolymer cement.

Siv cov txheej txheem ntawm "Portland cement + nquag ntxhia ntxiv + cov dej ua haujlwm siab txo tus neeg sawv cev", magnetized dej pob zeb thev naus laus zis, thiab cov txheej txheem kev npaj ua ntej, kev sim tau ua los ntawm kev npaj cov pa roj carbon tsawg thiab ultra-siab zog pob zeb slag pob zeb siv. raw cov ntaub ntawv xws li pob zeb thiab slag los ntawm ntau qhov chaw hauv zos.Cov txiaj ntsig tau qhia tias qhov kev noj tshuaj uas tsim nyog ntawm metakaolin yog 10%.Qhov loj rau lub zog piv ntawm cov cement pab rau ib chav tsev loj ntawm ultra-high lub zog pob zeb slag pob zeb yog kwv yees li 4.17 npaug ntawm cov pob zeb zoo tib yam, 2.49 npaug ntawm cov pob zeb muaj zog (HSC), thiab 2.02 npaug ntawm cov pob zeb reactive (RPC). ).Yog li ntawd, ultra-high lub zog pob zeb slag pob zeb npaj nrog tsawg npaum li cas cement yog cov kev taw qhia ntawm pob zeb kev loj hlob nyob rau hauv lub low-carbon economic era.

(3) Tom qab ntxiv kaolin nrog Frost tsis kam rau pob zeb, qhov pore loj ntawm cov pob zeb yuav txo tau zoo heev, txhim kho lub voj voog khov-thaw ntawm cov pob zeb.Nyob rau hauv ib qho ntawm cov voj voog khov-thaw, qhov elastic modulus ntawm cov qauv ua vaj tse nrog 15% kaolin cov ntsiab lus ntawm 28 hnub ntawm lub hnub nyoog yog qhov siab dua li cov ntaub ntawv siv ntawm 28 hnub ntawm hnub nyoog.Daim ntawv thov sib xyaw ntawm metakaolin thiab lwm yam ntxhia ultrafine hmoov hauv pob zeb kuj tuaj yeem txhim kho qhov ua tau zoo ntawm cov pob zeb.