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Laboratory evaluation of roller compacted concrete containing RAP

  • Ahmadi, Amin (Technology and Engineering Department, Shahrekord University) ;
  • Gogheri, Mohammad K. (Department of Civil Engineering, Tarbiat Modares University) ;
  • Adresi, Mostafa (Civil Engineering Department, Shahid Rajaee Teacher Training University) ;
  • Amoosoltani, Ershad (School of Civil Engineering, KN Toosi University)
  • 투고 : 2020.01.14
  • 심사 : 2020.10.20
  • 발행 : 2020.12.25

초록

This paper investigates mechanical properties of roller compacted concrete (RCC) involving reclaimed asphalt pavement (RAP). In this way, a set of 276 cylindrical RCC specimens were prepared with different RAP sizes (i.e., fine, coarse & total) at various ratios (i.e., 10%, 20%, and 40%). Results reveal that incorporation of RAP decreases unconfined compressive strength (UCS), modulus of elasticity (E), and indirect tensile (IDT) strength of RCC. For each RAP size, a regression model was used to maximize RAP content while satisfying the UCS lower limit (27.6 Mpa) mentioned by ACI as a minimum requirement for RCC used in pavement construction. Moreover, UCS of RAP incorporated mixes, dissimilar to that of control mixes, was found to be sensitive and insensitive to the testing temperature and curing time after 7 days, respectively. The results also demonstrate that the higher amounts of RAP, the more flexibility in RCC is. This issue was also proved by the results of modulus of elasticity test. In addition, the toughness index (TI) shows that increase in RAP content leads to up to 43% increase in energy absorbance capacity of RCC.

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참고문헌

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