• The Journal of the Korea Contents Association
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• v.20 no.6
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• pp.433-438
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• 2020

The aim of this study was to investigate the mechanical properties of pit and fissure sealant containing cerium oxide nano particles(CNP). Used to mix with pit and fissure sealant (Concise^TM, USA). CNP was added into liquid (0- 4.0 wt%) of pit and fissure sealant. The specimens for the vickers hardness (VHN; 10 × 2 mm), Three-point flexure (FS; 2 × 2 × 25 mm) with flexure modulus (FM) were obtained from cements at 1, 7, and 14 days after storing in (37±1)℃ distilled water. All mechanical strength tests were conducted using machine (Instron 3344) with a cross-head speed of 1 mm/min. Data were statistically analyzed by one-way ANOVA and Duncan posthoc test(p<0.05). Mechanical properties of conventional pit and fissure sealant could be enhanced by addition of CNP. Three-point flexure and modulus of pit and fissure sealant containing CNP were showed a slightly higher value not significantly with the group(p>0.05). The vickers hardness values were increase significantly with incubation time(p<0.05). Results indicated that CNP can be used considered as potential reinforcing agent for increasing mechanical properties for conventional pit and fissure sealant. Therefore, it was suggest that the additional effects of CNP and research on a wide range of substances.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2013.11a
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• pp.128-131
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• 2013

Energy losses through windows and doors are big problems in the construction industry. For glass only, it has takes the largest portion of mass from window assembly and it responsible for 24 ~ 45% of energy loss from total building energy loss. Insulating glass unit should maintain their basic functions during their working life in order to contribute positively for global warming issue. There have been many research works for improving insulating glass unit durability. But it is not easy job to fulfill the requirements because insulating glass units composed of many components. So, overall it is required to have right qualify control procedures starting from material selection to fabrication, shipping and installation to the customer site. In this report, we have reviewed the durability of insulating glass unit made from different grades of sealing materials based on globally accepted industry codes such as EN1279. ASTM E 2190 and Locally available code. KS L 2003. The result showed that there is a relationship between the mechanical properties of insulating glass 2nd sealant and the durability of the units.