Effect of Glass Cullet Size and Hydrated Lime—Nanoclay Additives on the Mechanical Properties of Glassphalt Concrete

Cansu İskender, Erol İskender, Atakan Aksoy and Celaleddin Ensar Şengül
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Cansu İskender: Department of Civil Engineering, Avrasya University, Trabzon 61010, Turkey
Erol İskender: Department of Civil Engineering, Technology Faculty, Karadeniz Technical University, Trabzon 61830, Turkey
Atakan Aksoy: Department of Civil Engineering, Engineering Faculty, Karadeniz Technical University, Trabzon 61080, Turkey
Celaleddin Ensar Şengül: General Directorate of State Hydraulic Works, Fourteenth Regional Directorate, İstanbul 34696, Turkey

Sustainability, 2021, vol. 13, issue 23, 1-17

Abstract: In this study, the use of glass waste as aggregate in asphalt mixtures was investigated. Maximum glass aggregate size options of 0.075, 2.00, 4.75 and 9.5 mm. were selected. Conventional bitumen, nanoclay-modified bitumen and hydrated lime-modified bitumen were used. Dense graded asphalt mixtures were designed according to the Marshall method. Mixtures were evaluated for low-temperature cracking, resistance to water damage, fatigue, and permanent deformation behavior with repeated creep, indirect tensile strength, indirect tensile fatigue, modified Lottman and Hamburg wheel tracking tests. Increasing glass aggregate size reduced the water damage resistance of asphalt mixtures because of the smooth surface of the glass particles and nanoclay and hydrated lime modification improved the mechanical properties of the asphalt mixtures. Using 2.00 mm sized maximum glass aggregate showed relatively less water damage and deformation properties due to higher internal friction which is due to the greater angularity of the glass particles. In addition, there was a significant correlation between repeated creep test, modified Lottman methods and Hamburg Wheel tracking test from the viewpoint of deformation and water damage assessments.

Keywords: asphalt concrete; cracking; fatigue; glass aggregate; hydrated lime; moisture damage; nanoclay; rutting; waste material (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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