Cov khoom tseem ceeb ntawm cov pob zeb ua vaj tse suav nrog cov cement (suav nrog cov khoom siv cementitious xws li hmoov av mineral, cov tshauv ya, thiab lwm yam), cov pob zeb sib xyaw (xuab zeb, pob zeb, ceramics, thiab lwm yam), dej, thiab cov khoom sib xyaw.
Lo lus concrete feem ntau yog hais txog cement concrete ua cov khoom siv cementitious, xuab zeb thiab pob zeb ua cov pob zeb sib xyaw; nws yog sib xyaw nrog dej (uas yuav muaj cov admixtures thiab admixtures) hauv qee qhov sib piv, thiab cov cement concrete tau los ntawm kev do kuj tseem hu ua ordinary concrete. Concrete, uas yog siv dav hauv kev tsim kho vaj tse.
Cov pob zeb ua vaj tse muaj cov yam ntxwv ntawm cov khoom siv raw ntau, tus nqi qis, thiab cov txheej txheem tsim khoom yooj yim, yog li nws cov kev siv khoom nce ntxiv. Tib lub sijhawm, cov pob zeb ua vaj tse kuj muaj cov yam ntxwv ntawm lub zog compressive siab, ruaj khov zoo, thiab ntau yam qib zog.
Cov yam ntxwv no ua rau nws siv dav, tsis yog hauv ntau yam kev tsim kho vaj tse xwb tab sis kuj tseem siv rau hauv kev tsim nkoj, kev lag luam tshuab, kev tsim kho dej hiav txwv, kev tsim kho geothermal, thiab lwm yam. Cov pob zeb kuj yog ib qho khoom siv tseem ceeb.
Hauv cov pob zeb ua vaj tse, xuab zeb thiab pob zeb ua lub luag haujlwm ntawm cov pob txha, uas hu ua cov pob zeb sib xyaw; cement thiab dej tsim cov cement slurry, thiab cov cement slurry qhwv qhov chaw ntawm cov pob zeb sib xyaw thiab sau nws cov qhov khoob. Ua ntej hardening, cov grout ua lub luag haujlwm lubricating, muab qhov sib tov qee yam ua haujlwm tau thiab pab txhawb kev tsim kho. Tom qab cov cement nplaum hardens, cov pob zeb sib xyaw raug cemented rau hauv ib qho khoom khov kho.
Qhov kev xaiv qib cement yuav tsum sib xws nrog qib kev tsim qauv ntawm cov pob zeb ua vaj tse. Hauv paus ntsiab lus, cov pob zeb ua vaj tse qib siab raug npaj, thiab cov cement qib siab raug siv; thaum npaj cov pob zeb ua vaj tse qib qis, cov cement qib qis raug xaiv.
Yog tias yuav tsum siv cov cement qib siab los npaj cov pob zeb uas tsis muaj zog, cov cement yuav tsawg dhau, uas yuav cuam tshuam rau kev ua haujlwm thiab kev sib xyaw, yog li yuav tsum ntxiv qee cov khoom sib xyaw. Yog tias yuav tsum siv cov cement qib qis los npaj cov pob zeb uas muaj zog, cov cement yuav ntau dhau, uas tsis yog kev lag luam thiab yuav cuam tshuam rau lwm yam khoom siv ntawm cov pob zeb.
Lub sijhawm tshaj tawm: Lub Kaum Hli-08-2022