Effect of Phosphoric Acid on the Performance of Asphalt Concrete

• Main Authors: Bo-xun Tai, 戴伯勳
• Other Authors: Jih-min Shiau
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/75585012868867390940

碩士 === 國立成功大學 === 土木工程學系碩博士班 === 95 === Acid can be used to improve asphalt temperature susceptibility, expand the temperature range that the asphalt uses, increase the asphalt stiffness in order to prevent rutting of the asphalt concrete. Recent studies showed that add the Phosphoric Acid could increase the asphalt stiffness at high temperatures, but the information and research of acid modification was still quite limited at present. This study used AC-20 as the basis asphalt and Phosphoric Acid was used as a modifier to evaluate effect of Phosphoric Acid on the properties of asphalt, Marshall samples were fabricated with Phosphoric Acid modified asphalt to study effect of Phosphoric Acid on the performance of asphalt concrete. According to result of tests, adding the Phosphoric Acid would increase asphalt stiffness, but would accelerate the asphalt aging. Because adding the Phosphoric Acid would increase asphalt stiffness, the resistance of rutting, tensile strength and the resistance of wearing of asphalt concrete were all improve. But the resistance to moisture damage was reduced. Results of the tests, showed that Phosphoric Acid could be added about 2%.