Determination of saturated water conductivity coefficient in building materials
Determination of saturated water conductivity coefficient in building materials
Data
2013
Autorzy
Suchorab, Zbigniew
Zarzeka-Raczkowska, Ewa
Tytuł czasopisma
ISSN czasopisma
Tytuł tomu
Wydawca
Państwowa Szkoła Wyższa im. Papieża Jana Pawła II w Białej Podlaskiej
Streszczenie
Capillary water uptake is a serious phenomenon influencing the functioning of old
and newly raised buildings, thus modeling of this process is very important for
prediction of the behavior of building objects. Among many models of water transport
in building barriers Richards model of unsaturated water flow can be distinguished.
This model of water transport in porous materials can be seriously applied
for capillary uptake simulations and can be useful to predict behavior of the walls
which are prone to groundwater influence. One of the most important empirical
parameters which are applied in the above mentioned model is hydraulic conductivity
coefficient k, which, depending on type of water flow can be expressed in
saturated state (saturated water conductivity coefficient ks) and water conductivity
in relation to moisture for unsaturated water transport model.
This article presents basic information about water transport models in saturated and unsaturated
states that can be applied for prediction of capillary rise phenomenon in building
barriers and determination of one of most important parameters – saturated water
conductivity ks. Saturated water conductivity coefficient was determined for red ceramic
brick, aerated concrete and autoclaved calcium silicate using a modified Wit apparatus,
which normally is applied for soil hydraulic conductivity coefficient determination.
Obtained results confirmed the lowest conductivity feature of red brick which is
expressed in the lowest value of saturated conductivity coefficient. Aerated concrete
and autoclaved calcium silicate are more porous materials and thus are more
hydraulically conductive.
Opis
Słowa kluczowe
capillary uptake,
Richards model,
water transport in porous media,
saturated water conductivity coefficient