<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>In recent years, the use of materials derived from recycled asphalt has attracted the attention of airfield and highway construction researchers. Since the making of these products is economically cost-effective, one idea about how to use them is to use coarse-grained crumbs from recycled Asphalt Pavement (RAP), which are agglomerates that can be found in coarse RAP, as a replacement for virgin asphalt.The goal of the current study is to investigate the performance of hot mix asphalt created with various percents of RAP. The punching shear strength of cylindrical specimens versus the penetration of steel rods with fixed and determined diameters into an asphalt specimen is one of the tests used to study the shear strength of asphalt. Other typical tests include a test of the structural strength and resilient modulus with two rectangular and sinusoidal loading shapes, respectively, as well as the specimen's strength against different temperatures of asphalt mixtures containing 10, 20, and 30% coarse-grained RAP. The results show that the resilient strength of the samples with a maximum 30% coarse-grained RAP is within reasonable limits. Furthermore, the semi-sinusoidal loading has a higher resilience modulus than rectangular loading. It is also observed during uniaxial penetration testing (UPT) that increasing the RAP increases the penetration of the steel rod, thereby implying that the shear strength of the asphalt has decreased.</p>
</abstract>

In recent years, the use of materials derived from recycled asphalt has attracted the attention of airfield and highway construction researchers. Since the making of these products is economically cost-effective, one idea about how to use them is to use coarse-grained crumbs from recycled Asphalt Pavement (RAP), which are agglomerates that can be found in coarse RAP, as a replacement for virgin asphalt.The goal of the current study is to investigate the performance of hot mix asphalt created with various percents of RAP. The punching shear strength of cylindrical specimens versus the penetration of steel rods with fixed and determined diameters into an asphalt specimen is one of the tests used to study the shear strength of asphalt. Other typical tests include a test of the structural strength and resilient modulus with two rectangular and sinusoidal loading shapes, respectively, as well as the specimen's strength against different temperatures of asphalt mixtures containing 10, 20, and 30% coarse-grained RAP. The results show that the resilient strength of the samples with a maximum 30% coarse-grained RAP is within reasonable limits. Furthermore, the semi-sinusoidal loading has a higher resilience modulus than rectangular loading. It is also observed during uniaxial penetration testing (UPT) that increasing the RAP increases the penetration of the steel rod, thereby implying that the shear strength of the asphalt has decreased.

Effects of Coarse Aggregate Rap Content on the Mechanical and Shear Performance of HMA by the UPT Method

Slovak Journal of Civil Engineering

This work is licensed under the Creative Commons Attribution 4.0 International License.

In recent years, the use of materials derived from recycled asphalt has attracted the attention of airfield and highway construction researchers. Since the...

Effects of Coarse Aggregate Rap Content on the Mechanical and Shear Performance of HMA by the UPT Method

Published Online: Jun 30, 2023

Page range: 70 - 78

DOI: https://doi.org/10.2478/sjce-2023-0014

Keywords
Sustainable development, Reclaimed Asphalt Pavement (RAP), Uniaxial shear-strength penetration, Airfield and road pavements

© 2023 Mohammad Mehdi Khabiri et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Effects of Coarse Aggregate Rap Content on the Mechanical and Shear Performance of HMA by the UPT Method

Published Online: Jun 30, 2023

Page range: 70 - 78

DOI: https://doi.org/10.2478/sjce-2023-0014

KeywordsSustainable development, Reclaimed Asphalt Pavement (RAP), Uniaxial shear-strength penetration, Airfield and road pavements

© 2023 Mohammad Mehdi Khabiri et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
Sustainable development, Reclaimed Asphalt Pavement (RAP), Uniaxial shear-strength penetration, Airfield and road pavements