Engineering Properties of Modified and Recycled Asphalt Concrete

• Main Authors: Yu-TingChen, 陳禹廷
• Other Authors: Jian-Shiuh Chen
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/p5pk52

碩士 === 國立成功大學 === 土木工程學系 === 106 === Fatigue cracking is one of the broken types of asphalt pavement in Taiwan. In this study, the engineering properties of asphalt concrete were tested to investigate the cracking behavior of asphalt concrete. The gradation of 19mm maximum aggregate size was adopted to control asphalt dosage and gradation curve. The results of water resistance showed that the AR-8000M and the SBS modified asphalt whose softening point was over 70°C, had good tensile strength ratio, indicating that appropriate modified effect was helpful for water resistance; besides, with the increase of the appending proportion for the reclaimed asphalt pavement (RAP), there was a downward trend in the result of indirect tension, affecting the ability of water resistance. According to the semi-circular bending test results, as the stiffness of asphalt increases, the strain energy to failure will increase. The modified asphalt concrete has better cracking resistance than the traditional asphalt concrete. The result of semi-circular bending test shows the contribution of polymer addition to asphalt concrete; in addition, The results of strain energy to failure and critical strain energy release rate of recycled asphalt concrete (RAC) show that 40% RAP of recycled asphalt concrete has better cracking resistance than traditional asphalt concrete. But with the RAP addition increasing, the cracking resistance of the recycled asphalt concrete will diminish.