1) Kuvandudza kusimba kwesimbi yesimbi nesimende ndeimwe yezviratidzo zvekushanda zvakanaka kwesimbi yesimbi. Chimwe chezvinangwa zvikuru zvekuwedzera metakaolin ndechekuvandudza kusimba kwesimbi yesimbi nesimende nesimende.

Poon nevamwe vake, Simba rayo pa28d ne90d rakaenzana neresimende yemetakaolin, asi simba rayo rekutanga rakaderera pane simende yekuenzanisa. Ongororo inoratidza kuti izvi zvinogona kunge zvine chekuita nekuungana kwakanyanya kweupfu hwesilicon hunoshandiswa uye kusapararira kwakakwana muslurry yesimende.

(2) Li Keliang nevamwe (2005) vakadzidza mhedzisiro yekupisa kwe calcination, nguva ye calcination, uye huwandu hwe SiO2 ne A12O3 mu kaolin pabasa re metakaolin kuvandudza simba re simende. Konkriti ine simba rakawanda uye ma polymer evhu akagadzirwa achishandisa metakaolin. Mhedzisiro yacho inoratidza kuti kana huwandu hwe metakaolin huri 15% uye chiyero che simende yemvura chiri 0.4, simba rekudzvanya pamazuva makumi maviri nemasere i 71.9 MPa. Kana huwandu hwe metakaolin huri 10% uye chiyero che simende yemvura chiri 0.375, simba rekudzvanya pamazuva makumi maviri nemasere i 73.9 MPa. Uyezve, kana huwandu hwe metakaolin huri 10%, chiyero chebasa rayo chinosvika 114, iyo iri 11.8% yakakwira kupfuura huwandu hwakafanana hwe silicon powder. Saka, zvinotendwa kuti metakaolin inogona kushandiswa kugadzira simende ine simba rakawanda.

Hukama hwe axial tensile stress-strain hwekongiri ne 0, 0.5%, 10%, uye 15% metakaolin hwakadzidzwa. Zvakaonekwa kuti nekuwedzera kwe metakaolin, peak strain ye axial tensile strength yekongiri yakawedzera zvakanyanya, uye tensile elastic modulus yakaramba isina kuchinja zvachose. Zvisinei, simba rekumanikidza rekongiri rakawedzera zvakanyanya, nepo compressive strength ratio yakadzikirawo saizvozvo. Simba rekumanikidza rekongiri ne compressive strength yekongiri ine 15% kaolin content iri 128% uye 184% ye reference concrete, zvichiteerana.
Pakudzidza simba rekusimbisa reupfu hwakatsetseka hwemetakaolin pakongiri, zvakaonekwa kuti pasi pekuyerera kwakafanana, simba rekudzvanya uye simba rekutenderera kwemota ine 10% metakaolin rakawedzera ne6% kusvika 8% mushure memazuva makumi maviri nemasere. Kukura kwekutanga kwesimba rekongiri yakasanganiswa nemetakaolin kwakakurumidza kupfuura kwekongiri yakajairwa. Zvichienzaniswa nekongiri yekuenzanisa, kongiri ine 15% metakaolin ine kuwedzera kwe84% musimba rekudzvanya re3D axial uye kuwedzera kwe80% musimba rekudzvanya re28d axial, nepo static elastic modulus ine kuwedzera kwe9% mu3D uye kuwedzera kwe8% mu28d.

Kukanganiswa kwehuwandu hwakasanganiswa hwevhu remetakaolin neslag pakusimba uye kugara kwenguva refu kwekongiri kwakadzidzwa. Zvakabuda zvinoratidza kuti kuwedzera metakaolin kuslag kongiri kunovandudza kusimba uye kugara kwenguva refu kwekongiri, uye chiyero chakanakisa cheslag nesimende chiri pa3:7, zvichikonzera kusimba kwekongiri kwakakodzera. Musiyano we arch wekongiri yakabatana wakakwira zvishoma pane wekongiri imwe chete yeslag nekuda kwemhedzisiro ye volcanoal ash yemetakaolin. Simba rayo rekupwanya rakakwira kupfuura rekongiri ye benchmark.

Kushanda zvakanaka, simba rekudzvanya, uye kugara kwenguva refu kwekongiri zvakadzidzwa nekushandisa metakaolin, fly ash, uye slag senzira yekutsiva simende, uye kusanganisa metakaolin ne fly ash uye slag zvakasiyana kugadzira kongiri. Zvakabuda zvinoratidza kuti kana metakaolin ikatsiva simende ye5% kusvika 25% zvakaenzana, simba rekudzvanya rekongiri pazera rese rinovandudzika; Kana metakaolin ikashandiswa kutsiva simende ne20% zvakaenzana, simba rekudzvanya pazera rega rega rakakodzera, uye simba rayo pa3d, 7d, uye 28d rakakwirira ne26.0%, 14.3%, uye 8.9% kupfuura rekongiri isina metakaolin yakawedzerwa, zvichiteerana. Izvi zvinoratidza kuti kune simende yeType II Portland, kuwedzera metakaolin kunogona kuvandudza simba rekongiri yakagadzirwa.

Kushandisa simbi slag, metakaolin, nezvimwe zvinhu sezvinhu zvikuru zvekugadzira simende ye geopolymer panzvimbo yesimende yePortland yechinyakare, kuitira kuzadzisa chinangwa chekuchengetedza simba, kuderedza kushandiswa, uye kushandura marara kuita pfuma. Mhedzisiro yacho inoratidza kuti kana huwandu hwesimbi neash inobhururuka huri 20%, simba re test block pamazuva makumi maviri nemasere rinosvika pakakwirira (95.5MPa). Sezvo huwandu hwesimbi slag yakawedzerwa huchiwedzera, inogonawo kuita basa rakati mukuderedza kuderera kwesimende ye geopolymer.

Kushandisa nzira yehunyanzvi ye "Portland cement+active mineral admixture+high-efficiency water reducing agent", tekinoroji yekongiri yemvura ine magnetized, uye maitiro ekugadzira, kuyedza kwakaitwa pakugadzira kongiri yematombo ine slag ine simba shoma uye ine simba guru uchishandisa zvinhu zvakaita sematombo uye slag kubva kunzvimbo dzakasiyana siyana dzemuno. Mhedzisiro yacho inoratidza kuti chiyero chakakodzera chemetakaolin i10%. Chiyero chehuremu nesimba chemupiro wesimende payuniti imwe chete yekongiri yematombo ine simba guru inosvika ka4.17 pane kongiri yakajairika, ka2.49 pane kongiri ine simba guru (HSC), uye ka2.02 pane kongiri yepoda inogadziriswa (RPC). Saka, kongiri yematombo ine simba guru yakagadzirwa nesimende ine dosage shoma ndiyo nzira yekukura kwekongiri munguva yehupfumi hwepasi pekabhoni.

(3) Mushure mekuwedzera kaolin ine chando chinodzivirira kongiri, saizi yepore yekongiri inodzikira zvakanyanya, zvichivandudza kutenderera kwechando-kunyunguduka kwekongiri. Pasi pehuwandu hwakati hwema cycles echando-kunyunguduka, elastic modulus yesample yekongiri ine 15% kaolin yemakore makumi maviri nemasere ekuberekwa yakakwira zvakanyanya kupfuura iyo yekongiri yekutarisa pamazuva makumi maviri nemasere ekuberekwa. Kushandiswa kwakabatana kwemetakaolin nedzimwe mineral ultrafine powders mukongiri kunogonawo kuvandudza kugara kwenguva refu kwekongiri.