I-1) Ukuphucula amandla e-samente slurry kunye nodaka ngenye yeempawu zentsebenzo ephezulu yekhonkrithi.Enye yeenjongo eziphambili zokongeza i-metakaolin kukuphucula amandla omdaka wesamente kunye nekhonkrithi.

Poon et al, Amandla ayo kwi-28d kunye ne-90d ilingana nesamente ye-metakaolin, kodwa amandla ayo okuqala angaphantsi kwe-benchmark yesamente.Uhlalutyo lubonisa ukuba oku kunokuthi kunxulumene ne-agglomeration enzima ye-silicon powder esetyenzisiweyo kunye nokusasazwa okwaneleyo kwi-slurry ye-samente.

(2) uLi Keliang et al.(2005) ifunde imiphumo yokushisa kwe-calcination, ixesha lokubala, kunye ne-SiO2 kunye ne-A12O3 umxholo kwi-kaolin kumsebenzi we-metakaolin ukuphucula amandla ekhonkrithi yesamente.Ikhonkrithi eyomelele kakhulu kunye neepholima zomhlaba zalungiswa kusetyenziswa i-metakaolin.Iziphumo zibonisa ukuba xa umxholo we-metakaolin u-15% kunye nomlinganiselo we-samente wamanzi ngu-0.4, amandla oxinzelelo kwiintsuku ezingama-28 yi-71.9 MPa.Xa umxholo we-metakaolin u-10% kunye nomlinganiselo we-cement wamanzi ngu-0.375, amandla oxinzelelo kwiintsuku ezingama-28 yi-73.9 MPa.Ngaphezu koko, xa umxholo we-metakaolin yi-10%, isalathisi somsebenzi wayo sifikelela kwi-114, eyi-11.8% ephezulu kunomlinganiselo ofanayo we-silicon powder.Ngoko ke, kukholelwa ukuba i-metakaolin ingasetyenziselwa ukulungiselela ikhonkrithi ephezulu yamandla.

I-axial tensile stress-strain relationship of concrete with 0, 0.5%, 10%, kunye ne-15% umxholo we-metakaolin wafundwa.Kwafunyaniswa ukuba ngokunyuka komxholo we-metakaolin, i-peak strain yamandla e-axial tensile yekhonkrithi yanda kakhulu, kwaye i-tensile elastic modulus yahlala ingatshintshi.Nangona kunjalo, amandla oxinzelelo lwekhonkrithi anyuke kakhulu, ngelixa umlinganiselo wamandla ocinezelayo wehla ngokuhambelanayo.Amandla okuqina kunye namandla oxinzelelo lwekhonkrithi kunye ne-15% umxholo we-kaolin yi-128% kunye ne-184% yekhonkrithi yereferensi, ngokulandelanayo.
Xa kufundwa umphumo wokuqiniswa kwe-ultrafine powder ye-metakaolin kwikhonkrithi, kwafunyaniswa ukuba phantsi kwe-fluidity efanayo, amandla oxinzelelo kunye namandla aguquguqukayo odaka oluqukethe i-10% metakaolin yanda nge-6% ukuya kwi-8% emva kweentsuku ze-28.Uphuhliso lwangaphambili lwamandla ekhonkrithi exutywe ne-metakaolin lwalukhawuleza kakhulu kunolo lwesamente eqhelekileyo.Xa kuthelekiswa nekhonkrithi ye-benchmark, ikhonkrithi equkethe i-15% ye-metakaolin inokwanda kwe-84% kwi-3D ye-axial compressive yamandla kunye nokunyuka kwe-80% kwi-28d ye-axial compressive yamandla, ngelixa i-static elastic modulus inokwanda kwe-9% kwi-3D kunye nokwanda kwe-8%. kwi28d.

Impembelelo yomlinganiselo odibeneyo womhlaba we-metakaolin kunye ne-slag kumandla kunye nokuqina kwekhonkrithi yafundwa.Iziphumo zibonisa ukuba ukongeza i-metakaolin kwikhonkrithi ye-slag kuphucula amandla kunye nokuqina kwekhonkrithi, kwaye umlinganiselo ofanelekileyo we-slag ukuya kwisamente ujikeleze i-3: 7, okukhokelela kumandla afanelekileyo wekhonkrithi.Umahluko omkhulu wekhonkrithi ehlanganisiweyo uphezulu kancinane kunolo lwekhonkrithi ye-slag enye ngenxa yesiphumo sothuthu lwentaba-mlilo ye-metakaolin.Ukomelela kwayo kokwahlulahlula kuphezulu kunoko lwekhonkrithi yebenchmark.

Ukusebenza, ukomelela okucinezelayo, kunye nokuqina kwekhonkrithi kwaphononongwa ngokusebenzisa i-metakaolin, uthuthu lwempukane, kunye ne-slag njengeendawo zesamente, kunye nokuxuba i-metakaolin kunye nothuthu lwempukane kunye ne-slag yodwa ukulungiselela ikhonkrithi.Iziphumo zibonisa ukuba xa i-metakaolin ithatha indawo ye-5% ukuya kwi-25% yesamente ngamanani alinganayo, amandla oxinzelelo lwekhonkrithi kuwo wonke ubudala aphuculwe;Xa i-metakaolin isetyenziselwa ukutshintsha i-samente ngama-20% ngobungakanani obulinganayo, amandla oxinzelelo kwiminyaka yobudala afanelekile, kwaye amandla ayo kwi-3d, 7d, kunye ne-28d yi-26.0%, 14.3%, kunye ne-8.9% ephezulu kunekhonkrithi ngaphandle kwe-metakaolin. yongezwa, ngokulandelelanayo.Oku kubonisa ukuba kwi-Type II ye-samente yasePortland, ukongeza i-metakaolin kunokuphucula amandla ekhonkrithi elungiselelwe.

Ukusebenzisa i-steel slag, i-metakaolin, kunye nezinye izinto njengezona zixhobo eziphambili zokulungiselela i-geopolymer samente endaweni yesamente yasePortland yendabuko, ukuze kuphunyezwe injongo yokugcinwa kwamandla, ukunciphisa ukusetyenziswa, kunye nokuguqula inkunkuma ibe yindyebo.Iziphumo zibonisa ukuba xa umxholo wentsimbi kunye ne-fly ash zombini i-20%, amandla ovavanyo lwebhloko kwiintsuku ezingama-28 afikelela phezulu kakhulu (95.5MPa).Njengoko inani le-slag yensimbi eyongeziweyo iyanda, inokudlala indima ethile ekunciphiseni ukucutheka kwesamente ye-geopolymer.

Ukusebenzisa indlela yobugcisa "yePortland isamente+i-mineral admixture+esebenza kakuhle kakhulu yokunciphisa amanzi", itekhnoloji yekhonkrithi yamanzi enemagnethi, kunye neenkqubo zolungiselelo oluqhelekileyo, kwenziwa imifuniselo ekulungiseleleni i-carbon ephantsi kunye ne-ultra-high-high-high-high-high-high-efficiency ye-slag ikhonkrithi kusetyenziswa. izinto ezikrwada ezifana namatye kunye ne-slag ukusuka kuluhlu olubanzi lwemithombo yendawo.Iziphumo zibonisa ukuba idosi efanelekileyo ye-metakaolin yi-10%.Ubunzima bobunzima bomlinganiselo womnikelo wesamente ngeyunithi ubunzima be-ultra-high amandla elitye lekhonkrithi ye-slag imalunga ne-4.17 amaxesha ekhonkrithi eqhelekileyo, amaxesha angama-2.49 ekhonkrithi ephezulu yamandla (HSC), kunye namaxesha angama-2.02 e-reactive powder concrete (RPC ).Ke ngoko, ukomelela kwelitye le-slag lekhonkrithi ephezulu kakhulu elungiselelwe ngedosi ephantsi yesamente lisikhokelo sophuhliso lwekhonkrithi kwixesha loqoqosho lwekhabhoni ephantsi.

(3) Emva kokongeza i-kaolin ngokuxhathisa iqabaka kwikhonkrithi, ubukhulu bepore bekhonkrithi buyancipha kakhulu, kuphucula umjikelo wokuqhaqhazela kwekhonkrithi.Ngaphantsi kwenani elithile lemijikelo yokunyibilika komkhenkce, imodyuli elastiki yesampulu yekhonkrithi ene-15% ye-kaolin eneentsuku ezingama-28 ubudala iphezulu kakhulu kunekhonkrithi yereferensi kwiintsuku ezingama-28 ubudala.Ukusetyenziswa okuhlanganisiweyo kwe-metakaolin kunye nezinye iipowders ze-mineral ultrafine kwikhonkrithi kunokuphucula kakhulu ukuqina kwekhonkrithi.