(1) gradation ntawm pob zeb. Raws li qhov wrapping tus nqi ntawm coarse aggregate thiab nplua aggregate ntawm tib lub ntim ntawm cov dej thiab cov cement sib txawv heev, qhov poob ntawm cov nplua aggregate yog tsawg dua li ntawm cov coarse aggregate qhob ntawm tib cov dej. Yog li ntawd, qhov hloov pauv ntawm kev sib sau ua ke yuav cuam tshuam rau qhov poob ntawm cov pob zeb.
(2) Cov ntsiab lus dej ntawm pob zeb. Kev cuam tshuam ntawm cov dej hauv cov ntsiab lus hloov ntawm cov pob zeb slump yog pom tseeb. Vim tias cov ntsiab lus ntawm cov dej hauv cov xuab zeb hloov pauv ntau heev, yog tias qhov hloov pauv ntawm cov ntsiab lus dej hauv cov xuab zeb tsis suav tias yog thaum cov pob zeb sib xyaw, nws yuav cuam tshuam rau qhov poob ntawm cov pob zeb.
(3) qhov kub ntawm cov cement. Kev cuam tshuam ntawm cov cement kub ntawm cov pob zeb ua pob zeb feem ntau tsis quav ntsej los ntawm cov neeg tsim khoom. Cement kub yog siab, tuaj yeem ua rau pob zeb kub nce tsis tau tsuas yog, thiab qhov poob qis tuaj yeem vim tias cov cement kub siab, bibulous loj dua thiab poob qis.
(4) yuam kev ntawm kev ntsuas ntsuas. Qhov ntsuas qhov sib txawv ntawm cov nplai dej thiab cov cement nplai muaj qhov cuam tshuam zoo rau cov pob zeb tawg. Yog tias qhov ntsuas qhov sib txawv ntawm cov nplai dej thiab cov cement nplai tsis ruaj khov, kev poob qis tsis yooj yim los tswj.
(5) tus nqi ntawm admixture. Tus nqi ntawm admixture muaj qhov cuam tshuam ncaj qha rau pob zeb slump. Nyob rau hauv cov txheej txheem ntau lawm, tus nqi ntawm admixture yuav tsum ruaj khov los ua lub luag haujlwm zoo dua.
(6) Lub cev qhuav dej ntawm gypsum hauv cov cement. Nyob rau hauv cov txheej txheem sib tsoo ntawm cov cement, vim qhov kub thiab txias, nws yog ib qho yooj yim los ua kom lub cev qhuav dej ntawm dihydrous gypsum hauv cement rau hauv semihydrous gypsum. Tom qab cov dej ntxiv rau ntawm cov cement sib tov coagulate, nrawm heev nrog cov tshuaj tiv thaiv dej 2 dej gesso afresh, ua kom lub fluidity ntawm pob zeb tee yog li, cuam tshuam cov pob zeb slump degree.
(7) adaptability ntawm admixture thiab cement. Muaj teeb meem kev hloov pauv ntawm hom kev sib xyaw ua ke thiab cov cement ntau yam. Yog tias qhov kev hloov pauv ntawm cov pob zeb sib xyaw thiab cov cement tsis zoo, nws yuav cuam tshuam rau cov dej ntws ntawm cov pob zeb thiab ua rau cov pob zeb poob.
(8) kev sib tsoo fineness ntawm cov cement. Qhov zoo ntawm cov cement cuam tshuam cov dej yuav tsum tau ua rau tus qauv sib xws ntawm cov cement. Feem ntau, qhov loj dua qhov tshwj xeeb ntawm thaj chaw ntawm cov cement, yuav tsum muaj dej ntau dua. Tshwj xeeb, cov cement tov nrog volcanic tshauv sib tov feem ntau muaj qhov loj ntawm thaj chaw tshwj xeeb thiab kev xav tau dej siab rau cov qauv sib xws ntawm cov cement. Nyob rau hauv cov xwm txheej ntawm tib qhov dej-cement piv ntawm cov pob zeb, qhov poob ntawm cov pob zeb yuav raug txo. Yog hais tias qhov zoo ntawm cov cement fluctuates zoo heev, nws yuav ua rau qhov hloov pauv ntawm cov pob zeb tawg.
(9) Lub sijhawm teeb tsa cov cement txawv txav. Nyob rau hauv cov txheej txheem ntawm cement clinker forging thiab hlawv, vim qee qhov laj thawj, cov ntsiab lus ntawm qee qhov ceev ceev cov ntxhia hauv cov cement clinker hloov, yog li lub sijhawm teem ntawm cov cement yog qhov txawv txav lossis hloov pauv ntau heev (qee zaum nrawm thiab qee zaum qeeb), ua rau lub slump ntawm pob zeb hloov heev.
