Abstract
Capillary rise is an important cause of deterioration for plaster in building. This phenomenon has been studied by the tensiometric experimental technique. Structural and hydric characteristics of plaster have been determined. Decane, a perfectly impregnate fluid, has been used to calculate the porous constant characteristic called and other structural parameters like pore radius and specific surface. Evaluation of the sensibility of plaster for water has been evaluated in a second time. The angle constant and the capillary moisture content have been determined. A comparison between results for plaster and composite plaster with fiber has been done. The addition of glass and hemp fiber does not have important effect on hydric properties (angle constant), but we have observed influence on structural charecteristics (pore radius, porosity, and degree of heterogeneity).
Highlights
Most building materials are porous allowing damp from the ground to rise by capillary action
Experimental method based on capillary rise is widely used for porous media characterization [6]
Cm which is a characteristic of the porous medium
Summary
Most building materials are porous allowing damp from the ground to rise by capillary action. Stone, plaster, and mortar are susceptible to this form of absorption levels of porosity vary [1]. These building materials, minerals, are deficient in their crystal system that result in surface charges that attract molecules of a dipolar solvent such as water [2]. Washburn’s equation is a basic instrument for analysis of height penetration and mass gain of wetting liquids in time inside porous media. Experimental method based on capillary rise is widely used for porous media characterization (i.e., pore radius and contact angle) [6]
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