An Investigation Was Conducted into the Effect of Using Modified Waste Concrete Aggregates on the Volumetric and Mechanical Properties of Hot Asphalt Mixtures and Asphalt Quality

Authors

  • Mehrdad Alijani * Department of Civil Engineering, Ayandehgan University, Tonekabon, Iran.

https://doi.org/10.48314/ijrceai.v2i1.32

Abstract

Compared to Natural Aggregates (NAs), waste concrete aggregates exhibit weaker mechanical and physical properties due to their weakly bonded, highly porous cement mortar. Therefore, their use in asphalt mixtures reduces their resistance to various types of damage. Therefore, in this study, to reduce permeability and increase the strength of bonded cement mortar, waste concrete aggregates were modified by two methods: chemical (coating their surfaces with a styrene butadiene rubber polymer) and physical (separation of cement mortar using heating), and used in asphalt mixtures. The findings showed that adding coarse aggregates from unmodified waste concrete up to 50% reduces the flow number and rutting resistance in asphalt mixtures. Also, using unmodified waste concrete aggregates as part of the coarse aggregate at 25% and 50% reduces the fatigue life of asphalt mixtures.

Keywords:

Waste concrete aggregates, Styrene butadiene rubber polymer, Fatigue life, Dynamic creep

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Published

2025-02-16

Issue

Vol. 2 No. 1 (2025): International Journal of Researches on Civil Engineering with Artificial Intelligence

Section

Articles

How to Cite

Alijani, M. (2025). An Investigation Was Conducted into the Effect of Using Modified Waste Concrete Aggregates on the Volumetric and Mechanical Properties of Hot Asphalt Mixtures and Asphalt Quality. International Journal of Researches on Civil Engineering With Artificial Intelligence , 2(1), 17-24. https://doi.org/10.48314/ijrceai.v2i1.32

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