An Evaluation on the Performance of Porous Asphalt

• Main Authors: Liu, Shou-I, 劉守益
• Other Authors: Lin Ciih-Dong, Chiang Jung-Bin
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/07977144995580836284

碩士 === 國立中央大學 === 土木工程學系 === 84 === Due to the subtropical situation of Taiwan, not only is the weather here hot and humid, but the monsoon is quite long. Under the circumstances if the Pavement cannot drain the rainwater rapidly, the water will splash and the skid resistance of pavement will be reduced owing to water film when the vehicle pass quickly, which may severely affect the driver''s sight and security. Now part of the Sun Yat-sen Freeway and Second Northern Freeway are pavedwith a layer of 1.5cm open grading; however, the effect is not desirable. Therefore, here we are trying to research on the optimal design method of porous asphalt based on the grading of European Porous Asphalt along with thefiber and lime as addition and anti-stripping agent. We also adopt AC-20 and other several modified asphalt as binder. The design method of porous asphalt in this research, including the Asphalt Adhesion Test and Cantabrian Abrasion Test and so on, has determined the optimal asphalt content. The test specimens are made by Gyratory Testing Machine (GTM). Its mechanical properties are evaluated by Resilient Modulus, Indirect Tensile Test, etc. In addition, we evaluate the durability of porous asphalt in Ultraviolet Chamber and by Pressure Oxidation Vessel. As to the resistance to deformation, the skid resistance, and the draining capacity of porous asphalt, they can all be evaluated by usable methods in our laboratory. From the results of the research, the AC-20 asphalt mixture made with fiber does reduce the lost of asphalt effectively during the process of this design method. However, the effect of the modified asphalt is still more obvious in the Cantabrian Abrasion Test. As to all mechanical properties test,porous asphalt overweighs open-grading, particularly in Permeability Coefficient Test, the permeability of porous asphalt is even triple the open- grading. As a result, in the rainy environment of Taiwan, porous asphalt should have great value in practical use.