Water absorption in brick masonry
conference paper
The water absorption in brick, mortar that was cured separately, and masonry samples was studied using NMR. Models of the moisture transport are usually formulated on the basis of a diffusion equation. In the case of water absorption in separate brick and mortar samples, the moisture diffusivity in this equation can be approximated by an exponential function of the moisture content. In the case of the brick, simulations using this exponential moisture diffusivity give an adequate description of the measured water absorption profiles.
In the case of a masonry sample, i.e., when brick and mortar are bonded, simulated moisture profiles assuming perfect hydraulic contact do not correspond with the measured moisture profiles. In this paper therefore an empiric resistance value, R, is modeled at the interface between the brick and the mortar layer in order to tune the simulated and the measured moisture profiles. Comparing the experimental results with results from simulations, shows that the mortar joint is less permeable if the mortar is cured bonded to the brick instead of cured separately
In the case of a masonry sample, i.e., when brick and mortar are bonded, simulated moisture profiles assuming perfect hydraulic contact do not correspond with the measured moisture profiles. In this paper therefore an empiric resistance value, R, is modeled at the interface between the brick and the mortar layer in order to tune the simulated and the measured moisture profiles. Comparing the experimental results with results from simulations, shows that the mortar joint is less permeable if the mortar is cured bonded to the brick instead of cured separately
TNO Identifier
329023
Source title
AIO Congres 'From materials to Building Structures', Elspeet, 25-26 april
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