Ntawm qhov tsis sib xws, qee qhov kev tswj hwm zoo yog qhov ruaj khov, sib xyaw tus nqi tswj tau zoo dua qhov chaw nres tsheb sib xyaw, kev siv cov khoom sib xyaw ua ke zoo dua, tus nqi siab dua, vim tias siv tau zoo thiab siv tsawg dua, tus nqi sib txawv ntawm admixture txo qis dua.
Qee qhov chaw sib xyaw ua ke txwv tus nqi ntawm cov khoom sib xyaw. Hauv qab qhov xwm txheej uas cov pob zeb poob qis tsis txaus, cov kws tshaj lij tuaj yeem txo cov xuab zeb, pob zeb noo noo cov ntsiab lus, los yog tsa cov pob zeb unilateral dej noj, coj cov pob zeb ua kom poob ncaj qha. Cov kws tshaj lij nrog kev paub zoo tuaj yeem ua rau tsis ncaj lossis nce cov dej sib xyaw ua ke ncaj qha rau tib lub sijhawm, nce tus nqi ntawm cov khoom siv cementitious kom tsim nyog (tswj cov kua nplaum sib piv tsis hloov), coj cov kev sib xyaw ua ke ntawm tus nqi nce ntxiv.
Qhov chaw nres tsheb sib xyaw tsis muaj kev tswj xyuas zoo thiab kev kuaj xyuas cov khoom sib xyaw. Thaum qhov zoo ntawm admixture fluctuates, lub tuam tsev technical tseem siv cov khoom qub. Txhawm rau kom ua tau raws li qhov yuav tsum tau ua ntawm cov pob zeb, qhov dej tiag tiag ntawm cov pob zeb nce, qhov sib piv ntawm cov dej-binder nce, thiab lub zog ntawm cov pob zeb txo qis.
