The Effect of Short-Term Exposure to Natural Outdoor Environment on the Strength of Tempered Glass Panel
Glass that used for architectural and structural purpose will undergo long term exposure to the natural outdoor environment. Exposure to outdoor weather such as temperature, humidity, UV-radiation, pH, etc. may cause deterioration of glass strength. This paper aims to study the effect of short-term exposures to natural outdoor environment on the strength of glass panel. Four sets of tempered glass samples were prepared for direct exposure to the outdoor environment. The samples were exposed to the outdoor environment for 40-, 80- and 120-days. A total of two tests namely microscopic observation on glass surface and four-point bending test on glass panel were conducted. Based on microscopic observation, the intensity of surface defects such as surface scratches, bubbles, and dust were increased for longer period of outdoor exposure. The bending and residual strengths of the glass panel reduced as the duration of the outdoor exposure was increased. The tempered glass material tends to undergo deterioration in strength by weathering process.
KeywordsTempered glass Four-point bending test Natural outdoor exposure Bending strength Residual stress Surface defects
This work was funded by the Universiti Sains Malaysia under Short Term Grant 304/PAWAM/60313013. The authors would like to thank the laboratory technician Mr. Abdullah Md. Nanyan for technical contributions.
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