Abstract
Although there is a large population in the limited space of metropolitan areas in Taiwan, but many manholes are often set on the pavement, which impact the quality of the pavement service and lead to public complaints. In recent years, the manholes have been gradually buried under the pavement on policy, so as to improve administration performance of government. The construction quality at the location of manhole is not easy to control, and often leads to the pavement damaged. This study assesses the differences of the temperature changes at manhole location from the general asphalt concrete when paved with asphalt concrete using the infrared thermal imager. The study found that the use of infrared thermal imager can get the difference of temperature of asphalt concrete pavement between the manhole position and the non-manhole position, and also can determine the position and width of manhole, so as to help to the construction compaction and quality control. Furthermore, because the temperatures of pavement at manhole position and non-manhole position are different, when the pavement damaged and need to dig the pavement for maintaining, the infrared thermal imager can be used to find nonmetallic manhole for construction management reference.
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