Investigation on Aesthetic and Water Permeability of Surface Protective Material under Accelerated Weathering
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Specimens
2.3. Surface Treatments
2.4. Accelerated Weathering (Weathering to Xenon-Arc Radiation)
2.5. Appearance Change
2.5.1. Visual Observation
2.5.2. Color Differences
2.5.3. Gloss
2.5.4. Roughness
2.5.5. Contact Angle
2.6. Water Absorption Test
2.7. Moisture Permeability Test
2.8. Anti-Soiling Test
2.8.1. Visual Observation
2.8.2. Color Difference
2.8.3. Pollution Average Width
3. Results and Discussions
3.1. Visual Observation
3.2. Brightness
3.3. Gloss
3.4. Roughness
3.5. Contact Angle
3.6. Water Absorption Test
3.7. Moisture Permeability Test
3.8. Anti-Soiling Test
3.8.1. Visual Observation
3.8.2. Pollution Average Width
3.8.3. Brightness Difference
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Water Cement Ratio | Cement | Flow | Air Content | Material Content (kg/m3) | ||
---|---|---|---|---|---|---|
w/c | (mm) | (%) | W | C | S | |
0.45 | white Portland cement | 200 | 3.0 | 228 | 415 | 1606 |
0.55 | 228 | 508 | 1525 |
Types and Symbol | N | A | B | C | D | |||||
---|---|---|---|---|---|---|---|---|---|---|
Un-Coated | Silane1 | Silane2 | Fluor-Resin | Silicate | ||||||
Coating procedure | First coating | - | - | - | - | - | water-based water repellent | 200 g/m2 | - | - |
Curing time | - | - | - | - | - | More than 16 h | - | - | ||
Medium coating | - | - | - | - | - | Fluor-resin | 100 g/m2 | - | - | |
Curing time | - | - | - | - | - | More than 3 h | - | - | ||
Top coating | - | Silane | 200 g/m2 | Silane | 200 g/m2 | Fluor-resin | 100 g/m2 | Aqueous silicate | 250 g/m2 | |
Curing time | - | More than 4 h | More than 6 h | More than 24 h | 24 h |
Time | Temperature | Black Panel Temperature | Relative Humidity | Irradiance | |
---|---|---|---|---|---|
min | °C | °C | % | (W/m2) | |
Wetting | 18 | 38 | - | 95 | 60 |
Drying | 102 | - | 63 ± 2 | 50 (40–60) | 60 |
Grade | Appearance Change |
---|---|
0 | No change (i.e., there is no change to be observed.) |
1 | Very small (i.e., barely observed change.) |
2 | A slight (i.e., a clearly observed change.) |
3 | Medium (i.e., a very clearly observed change.) |
4 | Critical (i.e., substantial change.) |
5 | Very marked change |
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Chen, F.; Quy, N.X.; Kim, J.; Hama, Y. Investigation on Aesthetic and Water Permeability of Surface Protective Material under Accelerated Weathering. Materials 2021, 14, 6896. https://doi.org/10.3390/ma14226896
Chen F, Quy NX, Kim J, Hama Y. Investigation on Aesthetic and Water Permeability of Surface Protective Material under Accelerated Weathering. Materials. 2021; 14(22):6896. https://doi.org/10.3390/ma14226896
Chicago/Turabian StyleChen, Feng, Nguyen Xuan Quy, Jihoon Kim, and Yukio Hama. 2021. "Investigation on Aesthetic and Water Permeability of Surface Protective Material under Accelerated Weathering" Materials 14, no. 22: 6896. https://doi.org/10.3390/ma14226896