Amirkabir Journal of Civil Engineering

Amirkabir Journal of Civil Engineering

Investigation of the Durability of RCCP Concrete Containing Various Volumetric Ratios of Asphalt Waste Against Harsh Environmental Conditions

Document Type : Research Article

Authors
1 Associate Professor, Department of Civil Engineering, Ur.C., Islamic Azad University, Urmia, Iran
2 Ph.D. Student, Department of Civil Engineering, Ur.C., Islamic Azad University, Urmia, Iran
Abstract
Over the years, asphalt road construction has been common in Iran, and today, These wastes are mainly transported to the outskirts and surrounding areas of cities, and there is no specific system for recycling them in industries. Additionally, the reconstruction of roads and new routes that are not subjected to heavy traffic does not require the use of first-grade, high-quality materials, as the current practice leads to an increase in the cost of construction and destruction of mines and natural resources. However, it is possible to construct many roads and routes that are not exposed to aggressive or corrosive environmental factors using recycled materials. In this study, different volumetric ratios of recycled asphalt aggregates were used to produce concrete. In this way, recycled asphalt coarse aggregates were used in different volumetric ratios of 10%, 20%, 30%, 40%, and 50% in place of natural aggregates in concrete. Other specifications and requirements were based on the national standard 14830. Furthermore, to increase the density and quality of the concrete, 10% by weight of microsilica was used. The tests conducted in this study included aggregate Los Angeles abrasion, slump, specific weight, compaction factor, water absorption (30 minutes and 72 hours), durability against freeze-thaw cycles, and assessment of concrete durability under acidic conditions. The summary of the results of this study showed that the reduction in the durability of the AS-10% design is mainly less than 10%, and it can be used in the construction of concrete pavement for low-traffic roads.
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