Cov khoom sib xyaw ua ke yog cov khoom tseem ceeb ntawm cov pob zeb ua vaj tse. Lawv ua haujlwm ua cov khoom siv inert hauv cov pob zeb ua vaj tse. Cov pob zeb me me thiab cov pob zeb ntxhib yog ob hom pob zeb tseem ceeb rau cov pob zeb ua vaj tse. Raws li lub npe qhia, lawv feem ntau raug faib ua pawg nyob ntawm qhov loj me ntawm cov khoom sib xyaw.
Ib qho Aggregate yog dab tsi?
Cov pob zeb sib xyaw ua ke yog cov khoom tseem ceeb ntawm cov pob zeb ua vaj tse uas muab lub cev rau cov pob zeb ua vaj tse thiab txo qhov kev ntsws. Cov pob zeb sib xyaw ua ke muaj li ntawm 70 txog 80% ntawm tag nrho cov pob zeb ua vaj tse. Yog li, peb tuaj yeem hais tias ib tus neeg yuav tsum paub meej txog cov pob zeb sib xyaw ua ke kom kawm paub ntxiv txog cov pob zeb ua vaj tse.
Dab tsi yog Fine Aggregate??
Thaum cov pob zeb sib xyaw raug lim los ntawm lub lim 4.75 hli, cov pob zeb uas dhau los ntawm nws hu ua cov pob zeb zoo. Cov xuab zeb ntuj feem ntau yog siv ua cov pob zeb zoo, cov av nplaum thiab av nplaum kuj tau los ua pawg no.
Dab tsi yog Coarse Aggregate??
Thaum cov pob zeb sib xyaw raug lim los ntawm lub lim 4.75 hli, cov pob zeb uas khaws cia hu ua cov pob zeb sib xyaw loj. Cov xuab zeb xuab zeb, cov pob zeb pob zeb thiab cov pob zeb loj yog cov uas muaj nyob hauv pawg no. Qhov loj tshaj plaws ntawm cov pob zeb sib xyaw uas siv yuav nyob ntawm qee qhov xwm txheej. Feem ntau, cov pob zeb sib xyaw loj 40 hli siv rau cov zog ib txwm thiab qhov loj 20 hli siv rau cov pob zeb muaj zog siab.
Qhov Sib Txawv Ntawm Cov Khoom Siv Zoo Thiab Cov Khoom Siv Loj
Cov pob zeb me me thiab cov pob zeb ntxhib muaj qee qhov sib txawv loj. Qhov sib txawv tseem ceeb ntawm cov pob zeb tob thiab cov pob zeb tsis tob yog qhov txhais, qhov loj ntawm cov khoom me me, cov ntaub ntawv, qhov chaw, thaj chaw saum npoo, kev ua haujlwm hauv cov pob zeb ua vaj tse, kev siv, thiab lwm yam.
Hauv cov lus qhia nram qab no, qhov sib txawv tseem ceeb ntawm cov pob zeb me me thiab cov pob zeb loj yog muab:
Los ntawm Dibyandu Pal— Ib tug Kws Ua Haujlwm Txog Kev Ua Vaj Tse
Lub sijhawm tshaj tawm: Lub Peb Hlis-29-2022