1 feem Cement 2 seem Xuab zeb 3 seem Aggregate (feem ntau gravel los yog crushed pob zeb)
Nov yog nws ua haujlwm li cas:
Cement: Qhov no yog tus neeg sawv cev khi hauv pob zeb. Koj yuav siv ib feem ntawm cov cement rau kev sib tov. Qhov no feem ntau yog ntsuas los ntawm ntim (piv txwv li, ib lub thoob, ib lub duav, lossis ib lub hnab ntawm cov cement).
Xuab zeb: Xuab zeb tau ntxiv los txhim kho kev ua haujlwm thiab txo qis kev tawg. Koj yuav siv ob feem ntawm xuab zeb rau kev sib tov. Ntxiv dua thiab, cov khoom no feem ntau ntsuas los ntawm ntim (piv txwv li, ob lub thoob lossis shovels).
Ua ke: Aggregate muab ntau thiab muaj zog rau cov pob zeb. Koj yuav siv peb feem ntawm tag nrho, uas feem ntau gravel los yog crushed pob zeb, rau kev sib tov. Cov khoom no kuj ntsuas los ntawm ntim (xws li, peb lub thoob lossis shovels).
Txhawm rau tsim ib qho kev sib xyaw ua ke siv cov cai 1-2-3:
Pib los ntawm kev ntsuas qhov xav tau ntawm cov cement (1 feem).
Ntxiv ob zaug ntawm cov xuab zeb (2 seem) rau cov cement. Sib tov ua ke kom huv si kom txog thaum lawv zoo sib xyaw thiab muaj xim zoo ib yam.
Thaum kawg, ntxiv peb zaug ntawm qhov sib sau ua ke (3 ntu) rau kev sib xyaw ntawm cov cement thiab xuab zeb. Ntxiv dua thiab, sib tov txhua yam ua ke kom huv si kom txog thaum cov aggregates sib npaug sib npaug thoob plaws qhov sib tov.
Tom qab sib tov, ntxiv dej maj mam kom ua tiav qhov xav tau sib xws. Ceev faj tsis txhob ntxiv dej ntau dhau, vim qhov no tuaj yeem ua rau cov pob zeb tsis muaj zog.
Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias thaum txoj cai 1-2-3 muab cov lus qhia yooj yim rau kev kwv yees qhov sib npaug, nws tsis suav nrog kev hloov pauv ntawm cov ntaub ntawv tshwj xeeb uas koj siv, qhov xav tau lub zog, lossis lwm yam uas yuav tsum tau hloov kho. Rau cov ntawv thov tseem ceeb lossis thaum muaj kev tswj xyuas qhov tseeb ntawm cov pob zeb sib xyaw yog tsim nyog, nws yog ib qho tsim nyog ua raws li kev sib xyaw ua ke tsim los ntawm tus kws tsim qauv lossis siv cov pob zeb ua ntej pob zeb sib xyaw uas qhia txog qhov sib piv thiab cov yam ntxwv.
