Kev ceev faj rau kev siv cov khoom sib xyaw ua ke

(1) Kev siv yuav tsum yog raws li cov cement tshwj xeeb. Ua ke nrog kev ua haujlwm ntawm ntau yam dej txo tus neeg saib xyuas thiab kev ua haujlwm ua vaj tse los txiav txim siab qhov tsim nyog npaum li cas. Cement tuaj yeem txuag tau los ntawm kev ntxiv dag zog rau daim ntawv cog lus ntawm cov txheej txheem sib txuas los ntawm cov tshuaj tiv thaiv hydration nkaus xwb nyob rau saum npoo ntawm cov khoom sib xyaw. Nyob rau hauv cov xwm txheej uas cov txheej txheem kev tso cai, qhov tsim nyog nce ntawm cov pob zeb sib xyaw kom muaj nuj nqis yog cov khoom siv ntau dhau kev hloov tshuab. (2) Cov pob zeb nrog cov khoom siv feem ntau muaj cov dej ntws zoo thiab cov dej ntws qeeb, thiab kev vibration ntau dhau ntawm cov txheej txheem tsim ua rau ntab thiab stratification ntawm qee lub teeb admixtures, ua rau cov plua plav hauv paving pob zeb. Admixtures yuav tsum tsim nyog ntxiv rau pavement pob zeb. Cov pob zeb slump yuav tsum tsis txhob loj dhau kom tsis txhob muaj kev sib cais ntawm cov pob zeb vim kev co ntau dhau.