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Recycling of RAP and steel slag aggregates into the warm mix asphalt: A performance evaluation by Mansour Fakhri; Amin Ahmadi is a Engineering article available to read on EtoBox.

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Incorporation of electric arc furnace (EAF) steel slag aggregates in asphalt mixes boosts their performance, but the high bitumen consumption is the primary obstacle that hinder their widespread application. To remove this barrier this research investigates the effects of concurrent recycling of reclaimed asphalt pavement (RAP) and steel slag aggregates into the warm mix asphalt (WMA) mixes. To this end, six types of WMA asphalt mixes with two coarse steel slag contents (0% and 40%) and three fine RAP contents (0%, 20% and 40%) were prepared and their moisture resistance, resilient modulus, dynamic creep and fatigue behavior were evaluated and statistically were compared to each other. Results showed that contrary to the steel slag, RAP clearly improves resistance to moisture damage of mixes. The addition of RAP to the WMA also increases the resilient modulus at all the temperatures; however, addition of steel slag only at intermediate and high temperatures leads to improvement in the resilient modulus. Nonetheless, sensitivity of resilient modulus to the temperature decreases with incorporation of both marginal materials. Moreover, it is found that adding RAP and/or steel slag sig

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Author

Mansour Fakhri; Amin Ahmadi

Publisher

Elsevier BV

Published

2017

Language

EN

Field

Engineering (Physical Sciences)