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A platform for research: civil engineering, architecture and urbanism
Dynamic Complex Modulus and Rutting Characteristics of Reclaimed Asphalt Pavement (RAP) Mixes
Reusing pavement materials after reclaiming ensures the conservation of natural resources and becomes an ideal solution to the increasing need for road construction materials. Recycled asphalt or Reclaimed Asphalt Pavement (RAP) is a valid alternative as it decreases the use of virgin aggregates and bitumen in Hot Mix Asphalt (HMA) mixes. The Mechanistic-Empirical Pavement Design Guide emphasizes the modulus/stiffness-based approach for assessing the flexible pavement’s fatigue and rutting criteria. An attempt to estimate the number of load repetitions for the failure of mixes by rutting (msa) using the Dynamic Complex Modulus (E) obtained from the Witczak E Predictive model has been made in this paper. RAP extracted from a Bituminous Concrete (BC) surface was used in the preparation of RAP-HMA mixes, and these mixes were prepared with Natural Rubber-Modified Bitumen (NRMB) and VG 30 as binders. The E-value of RAP-HMA mixes was found when different percentages of RAP (0, 5, 10, 15, 20, and 30%) were added to the virgin aggregates. An increase in the E-value was observed with the increase in RAP in HMA mixes. The mixes prepared with NRMB gave greater E-values, ranging from 3408.2 to 3691.2 MPa, compared to the mixes prepared with VG 30, ranging from 3309.6 to 3412.09 MPa. With an increase in RAP percentages for mixes with both NRMB and VG 30, the number of load repetitions for failure by rutting also increased.
Dynamic Complex Modulus and Rutting Characteristics of Reclaimed Asphalt Pavement (RAP) Mixes
Reusing pavement materials after reclaiming ensures the conservation of natural resources and becomes an ideal solution to the increasing need for road construction materials. Recycled asphalt or Reclaimed Asphalt Pavement (RAP) is a valid alternative as it decreases the use of virgin aggregates and bitumen in Hot Mix Asphalt (HMA) mixes. The Mechanistic-Empirical Pavement Design Guide emphasizes the modulus/stiffness-based approach for assessing the flexible pavement’s fatigue and rutting criteria. An attempt to estimate the number of load repetitions for the failure of mixes by rutting (msa) using the Dynamic Complex Modulus (E) obtained from the Witczak E Predictive model has been made in this paper. RAP extracted from a Bituminous Concrete (BC) surface was used in the preparation of RAP-HMA mixes, and these mixes were prepared with Natural Rubber-Modified Bitumen (NRMB) and VG 30 as binders. The E-value of RAP-HMA mixes was found when different percentages of RAP (0, 5, 10, 15, 20, and 30%) were added to the virgin aggregates. An increase in the E-value was observed with the increase in RAP in HMA mixes. The mixes prepared with NRMB gave greater E-values, ranging from 3408.2 to 3691.2 MPa, compared to the mixes prepared with VG 30, ranging from 3309.6 to 3412.09 MPa. With an increase in RAP percentages for mixes with both NRMB and VG 30, the number of load repetitions for failure by rutting also increased.
Dynamic Complex Modulus and Rutting Characteristics of Reclaimed Asphalt Pavement (RAP) Mixes
Lecture Notes in Civil Engineering
Rastogi, Rajat (editor) / Bharath, G. (editor) / Singh, Dharamveer (editor) / Salini, U. (author) / Koshy, Soorya Ann (author)
International Conference on Transportation Infrastructure Projects : Conception to Execution ; 2022 ; Haridwar, India
2023-07-22
12 pages
Article/Chapter (Book)
Electronic Resource
English
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