Effects of Curing Time and Reheating on Performance of Warm Stone-Matrix Asphalt

AbstractThe effects of curing time and reheating on the short-term performance of stone-matrix asphalt (SMA) mixtures with various warm-mix additives (i.e., Evotherm, Sasobit, and foamed asphalt) was evaluated in laboratory performance tests. The laboratory tests included complex modulus, loaded whe...

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Veröffentlicht in:Journal of materials in civil engineering 2012-11, Vol.24 (11), p.1422-1428
Hauptverfasser: Al-Qadi, Imad L, Wang, Hao, Baek, Jongeun, Leng, Zhen, Doyen, Matt, Gillen, Steve
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container_end_page 1428
container_issue 11
container_start_page 1422
container_title Journal of materials in civil engineering
container_volume 24
creator Al-Qadi, Imad L
Wang, Hao
Baek, Jongeun
Leng, Zhen
Doyen, Matt
Gillen, Steve
description AbstractThe effects of curing time and reheating on the short-term performance of stone-matrix asphalt (SMA) mixtures with various warm-mix additives (i.e., Evotherm, Sasobit, and foamed asphalt) was evaluated in laboratory performance tests. The laboratory tests included complex modulus, loaded wheel track, indirect tensile (IDT) strength, and semicircular beam (SCB) fracture. In the tests, plant-produced mixes that were sampled from a field overlay project were compacted in the laboratory with and without reheating, and performance tests were conducted at various curing times after compaction. The effect of curing time on mixture characteristics was dependent on the mixture type and performance test considered. The mixtures containing warm-mix additives showed similar variations in mixture properties due to curing time compared to the control mixture. The reheating process caused asphalt mixtures to have greater modulus, tensile strength, and rutting resistance but smaller fracture resistance. Among the mixtures containing various warm-mix additives, the mixture containing Sasobit showed the relatively smallest changes in mixture properties attributable to reheating. Finally, it was discovered that the warm SMA mixtures showed variations in different performance characteristics, depending on the type of warm-mix additives and recycled materials, than the control mixture.
doi_str_mv 10.1061/(ASCE)MT.1943-5533.0000513
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source American Society of Civil Engineers:NESLI2:Journals:2014
subjects Additives
Applied sciences
Asphalt
Bitumen. Tars. Bituminous binders and bituminous concretes
Buildings. Public works
Curing
Exact sciences and technology
Heating
Materials
Performance tests
Reheating
Shape memory alloys
Technical Papers
Tensile strength
title Effects of Curing Time and Reheating on Performance of Warm Stone-Matrix Asphalt
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