| Summary: | 碩士 === 國立臺灣科技大學 === 營建工程系 === 91 === This study is to investigate the materials property, application and pavement performance of seal coat. There are two stage in the study. In the first stage is collecting the relative literriture of this study, new materials and surveying the application of seal coat by the questionary. The second stage is conducting tests of the engineering properties of slurry seal and micro-surfacing pavement, evaluating the effect of aggreate gradation and pavement thickness on the engineering properties of asphalt concrete pavement, the field pavement maintence is also performens.
The test result shows that HMA seal coat is still the main stream in domestic maintenance, use of slurry seal and pavement micro-surfacing in the application of seal coat is minimal. This is due to the lack of relavent specification and project application in domestic market, s well as the lack of construction equipment and high cost. In the asphalt mix design of seal coat, slurry seal uses emulsified asphalt residual 10-16%(aggregate typaⅠ), 7.5-13.5%( aggregate typaⅡ), 7-12%( aggregate typeⅢ), to meet viscosity tests and abrasion tests requirements. Pavement micro-surfacing uses emulsified asphalt residual 6-9%( aggregate typaⅡ), and 7-12%( aggregate typeⅢ), to meet viscosity tests and abrasion tests requirements.
In the engineering property aspect, increase in the size of the aggragate increases the indirect tension force, time threshold and resists to rutting deformation. In the thickness of seal coat increase in the thickness increases the indirect tension force of asphalt concrete, time threshold and resists to rutting deformation. From the results of cross comparision, pavement seal coat can effect by promote the performance of existing pavements.
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