Cov neeg Loos puas siv pob zeb?
Cov neeg Loos puas siv pob zeb?

Video: Cov neeg Loos puas siv pob zeb?

Video: Cov neeg Loos puas siv pob zeb?
Video: Pob zeb tsis nias taub hau 8/14/2017 2024, Hlis ntuj nqeg
Anonim

Lub Secrets ntawm Ancient Roman pob zeb . Lawv pom tias cov Romans ua pob zeb los ntawm kev sib tov txiv qaub thiab volcanic pob zeb los ua ib tug mortar. Txhawm rau tsim cov qauv hauv qab dej, cov mortar thiab volcanic tuff tau ntim rau hauv cov ntawv ntoo.

Ib yam li ntawd, cov neeg Loos puas tau tsim cov cement?

Cov Romans ua ntej invented niaj hnub no peb hu ua hydraulic cement -raws li pob zeb . Lawv ua tau ntau heev pob zeb cov qauv, suav nrog Pantheon hauv Rome, yog ib qho piv txwv zoo tshaj plaws ntawm Roman architecture uas muaj sia nyob rau niaj hnub no, uas muaj 42-meter-inch dome ua los ntawm poured pob zeb [1].

Qhov thib ob, puas yog Roman pob zeb zoo dua? Raws li nws hloov tawm, tsis tsuas yog yog Roman pob zeb ntau ruaj tshaj qhov peb tuaj yeem ua tau niaj hnub no, tab sis nws yeej muaj zog dua lub sijhawm. Niaj hnub nimno pob zeb feem ntau yog ua nrog portland cement , sib tov ntawm silica xuab zeb, limestone, av nplaum, chalk thiab lwm yam khoom xyaw melted ua ke ntawm blistering kub.

Puas yog Roman pob zeb tseem siv niaj hnub no?

Niaj hnub nimno pob zeb - siv nyob rau hauv txhua yam los ntawm txoj kev mus rau lub tsev mus rau choj - tuaj yeem tawg hauv tsawg li 50 xyoo. Tab sis ntau tshaj li ib txhiab xyoo tom qab sab hnub poob Roman Empire crumbled rau plua plav, nws pob zeb cov qauv yog tseem sawv.

Cov neeg Loos ua li cas ua vaj tse tsis muaj dej?

Lawv nrhiav tau qhov ntawd Roman engineers siv ib tug sib tov ntawm volcanic tshauv, seawater thiab txiv qaub, uas teem tawm ib tug tshuaj tiv thaiv uas muaj zog cohesion nrog raug rau seawater, txawm tom qab lub pob zeb muaj technically teem. Qhov no "pozzolanic cov tshuaj tiv thaiv" ua rau tsim muaj cov muaju hauv qhov khoob ntawm qhov pob zeb.

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