Date Approved

1-30-2024

Embargo Period

1-30-2024

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Civil Engineering

Department

Civil Engineering

College

Henry M. Rowan College of Engineering

Advisor

Yusuf Mehta, Ph.D.

Committee Member 1

Daniel Offenbacker, Ph.D.

Committee Member 2

Mohamed Elshaer, Ph.D., P.E.

Keywords

asphalt paving, asphalt binders, Hot Mix Asphalt, Warm Mix Asphalt

Subject(s)

Asphalt--Additives; Pavements--Design and construction

Disciplines

Civil Engineering | Transportation Engineering

Abstract

The study aims to evaluate the impact of warm mix additives (WMA) on the rheological and performance properties of asphalt binders and mixtures. For this purpose, PG 76-28 and PG 58-28 were obtained with one organic (Sasobit Redux) and three chemical WMA (Rediset, Evotherm, and Zycotherm). All WMA-modified asphalt binders were aged at three different aging levels. Laboratory tests such as performance grade (PG), critical temperature differential (ΔTc), asphalt binder cracking device (ABCD), linear amplitude sweep test (LAS), and Fourier transform infrared spectroscopy (FTIR) were performed. In addition to the binder testing plan, this study also evaluated the impact of WMA type, binder grade, and compaction temperature on the volumetrics and performance of the mixtures when compacted at lower than traditional temperatures (260℉, 220℉, and 180℉). The cracking, rutting, and moisture damage resistance of all mixtures were evaluated using the Indirect Tensile Cracking Test (IDEAL-CT), Asphalt Pavement Analyzer (APA), and tensile strength ratio (TSR), respectively. Laboratory testing showed WMA's feasibility to improve the binder and mixture properties performance compared to the control mixture and binder. Finally, All mixtures were evaluated using the multi-factor analysis of variance (ANOVA), and ranking was developed based on the mean difference of each mixture.

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