Lub impermeability ntawm Micro-silica Concrete

Pob zeb yog ib yam khoom siv permeable, thiab nws cov permeability muaj feem xyuam rau nws cov porosity, pore tis thiab pore connectivity. Qhov me me ntawm cov dej-cement piv thiab ntev lub hnub nyoog kho ntawm vibratory compacted pob zeb, qhov me dua qhov permeability. Permeability kuj tuaj yeem txo los ntawm kev ntxiv cov cua nkag mus rau cov pob zeb. Feem ntau, ua vaj tse nrog dej-cement piv tsawg dua 0.50 muaj qhov permeability coefficient ntawm 1 × 10-11m / s. Lub permeability ntawm pob zeb hauv dej hiav txwv yog ib qho tseem ceeb uas txiav txim siab lub durability ntawm pob zeb engineering. Qhob nrog siab permeability yog ib qho yooj yim kom puas nyob rau hauv seawater. Vim tias cov hmoov silica hmoov me me, 20 mus rau 100 npaug me dua li cov cement hais, nws tuaj yeem ntim rau hauv qhov chaw nruab nrab ntawm cov cement, kom cov pob zeb ntom ntom. Nyob rau tib lub sijhawm, qhov thib ob hydration ntawm silica hmoov thiab cov khoom tshiab thaiv cov permeation channel hauv cov pob zeb, yog li cov permeability tsis kam ntawm silica hmoov pob zeb yog qhov muaj zog heev, thiab cov permeability ntawm cov pob zeb nce nrog qhov nce ntawm cov dej-binder ratio. Qhov no yog vim cov dej-cement yog qhov ntom ntom dua li pob zeb.

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