|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||K-41: Porosity of Soil Pigments Based Paints
||Reinaldo Luiz dos Santos, Beatryz Mendes, Rita de Cássia Silva Sant'ana Alvarenga, Fernando de Paula Cardoso, Anôr Fiorini Carvalho
|On-Site Speaker (Planned)
An ancient brazilian painting technique consists of applying a cloth material immersed in mud above surfaces. The paint quality is low, requiring frequent maintenance. Earth Colors project have contributed to the improvement of this technique, developing soil and PVA inks. The porosity of the paint film is one of the factors responsible for the appearance of pathologies. The use of low porosity inks can cause moisture accumulation. Thus, the porosity of paints produced with characteristic soils of the city of Viçosa, Minas Gerais, Brazil was analyzed. Based on the results obtained for the dry and wet covering power and abrasion resistance, the three best formulations for each pigment were selected and submitted to porosity tests. It is concluded the yellow ink has a higher porosity than the others. Moreover, just yellow and white paints samples have contrast ratio in or near the allowed limit for latex paints.
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