Kev ntshav yog ib hom kev cais tawm nyob rau hauv cov dej uas tam sim no hauv cov pob zeb sib xyaw yog thawb mus rau pem hauv ntej vim kev sib haum xeeb ntawm cov cement thiab aggregate Cov dej tshwj xeeb ntawm cov dej qis, vim yog cov dej no zoo li txav mus los. Los ntshav ib txwm tshwm sim hauv cov pob zeb ntub dej.
Cov pob zeb los ntshav yog dab tsi?
BLEEDING hauv pob zeb yog tshwm sim uas cov dej dawb hauv cov khoom sib xyaw nce mus rau saum npoo thiab tsim cov tshuaj nplaum ntawm cov cement rau saum npoo paub ua "laitance". Los ntshav tshwm sim hauv pob zeb thaum cov chav kawm sib sau ua ke zoo nyob thiab cov dej dawb nce mus rau saum npoo.
txhais li cas los ntawm kev sib cais ntawm pob zeb?
Cov pob zeb yuav tsum muaj kev cais tawm dawb. Nws txhais tau tias yog kev tawg ntawm kev sib koom ua ke (kev sib cais ntawm cov pob zeb sib xyaw) hauv cov pob zeb loj. Nws ua rau zib ntab combing, txo qhov ntom, thiab thaum kawg poob lub zog ntawm cov pob zeb tawv tawv.
Dab tsi yog qhov tseem ceeb ntawm kev cais thiab los ntshav hauv pob zeb?
Kev tsim cov dej nyob rau saum npoo ntawm cov pob zeb ua rau ncua sij hawm qhov chaw tiav. Qhob ua permeable thiab poob nws homogeneity. xov ntshav ntau dhau ua rau kev sib koom ua ke ntawm kev txhawb nqa thiab pob zeb.
Peb tuaj yeem tiv thaiv kev sib cais thiab los ntshav hauv pob zeb li cas?
Txoj hauv kev los txo cov ntshav hauv cov pob zeb muaj xws li:
- Txo cov dej. Siv cov khoom qis qis qis.
- Siv cov cement zoo dua.
- Npaj nyiaj nplua rau hauv cov xuab zeb.
- Siv cov khoom siv cementitious ntxiv.
- Siv cua entraining admixtures.
