Shrinkage yog qhov ua rau tawg. Raws li cov pob zeb hardens thiab dries nws shrinks. Qhov no yog vim qhov evaporation ntawm cov dej sib tov ntau dhau. … Qhov shrinkage no ua rau muaj zog hauv cov pob zeb uas txhais tau tias rub lub slab sib nrug.
Puas tawg hauv pob zeb ib txwm?
Thaum tawg yog ib txwm muaj nyob rau hauv cov pob zeb tshiab tshiab, cov kab nrib pleb feem ntau dhau los ua tsis pom zoo thaum ua haujlwm. Nws yog ib qho txaus ntshai kom pom cov kab nrib pleb ua rau hauv pob zeb thaum koj nyuam qhuav them tus nqi ntawm txoj kev tsheb tshiab, pob zeb pob zeb, txoj kev taug kev, lossis chaw nres tsheb hauv pem teb.
Thaum twg kuv yuav tsum txhawj xeeb txog cov pob zeb tawg?
Ib kab nrib pleb ntawm 1/8 nti lossis tsawg dua feem ntau yog ib qho kev sib tsoo thiab tsis ua rau muaj kev txhawj xeeb. Yog tias qhov tawg loj dua lossis loj dua (ib qho "khiav" tawg), lossis ib sab ntawm qhov tawg yog siab dua lwm qhov, ces koj yuav tsum tau ua haujlwm los tshuaj xyuas los ntawm tus kws tsim qauv.
Dab tsi ua rau tawg thaum ntxov hauv pob zeb?
Tshiab slabs-rau-hauv av tawg thaum tensile stresses los ntawm restrained shrinkage tshaj lub pob zeb lub zog. Hom kev tawg thaum ntxov no tshwm sim nyob rau thawj ob peb hnub ntawm lub slab lub neej thiab yog tshwm sim los ntawm cov pob zeb thaum ntxov hloov pauv cuam tshuam rau qhov qhuav shrinkage thiab thermal contraction
Dab tsi ua kom pob zeb tawg?
Txau cov pob zeb nrog dej (tseem hu ua "kev kho ntub dej"- Nquag hosing down curing pob zeb nrog dej (5 lossis ntau zaus / hnub) rau thawj 7 Hnub no ua kom lub ntsej muag ntawm cov nplais ntub dej thaum cov pob zeb ua kom zoo ntxiv.
