Effect of latex paint compositions on the water transport mechanism (original) (raw)
Absorbed water is the main deterioration factor of building materials, mainly for external wall surfaces. These surfaces can be protected by paints which may reduce the volume of absorbed water from external sources. At the same time, mould growth on coated external wall surfaces is also an important durability problem. A knowledge of the degradadion factors is important for increasing the service life of paintwork and for reducing maintenance costs. The rate of absorption and evaporation of water through the paint film affects the moisture content in the substrate. This property is also related to the time of wetness which affects the growth of fungus. In order to understand the water transport mechanism, the water absorption and evaporation of latex paints with different pigment/binder ratios was studied. The tests were done applying paints to mortar and concrete substrates. The results show that there is a correlation between paint composition and the rate of absorption and evapo...
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