Document Type

Data Set

Publication Date

Winter 2024

Abstract

Moisture damage is a significant concern for state Departments of Transportation (DOTs) and other agencies due to its adverse impact on pavement performance as well as longevity. The main focus of the current study project is to quantify, at the molecular level, the interaction between binder and aggregate at the interface level in the form of adhesion forces between bitumen samples and minerals of various chemical compositions. First of all, A thorough review of the literature on moisture degradation in asphalts was conducted. Based on the literature review, a comprehensive project plan and test matrix were created. Binder samples from two sources and two types of aggregates were collected. Besides two types of anti-stripping agent-modified samples and two types of asphalt mixes were collected from the plant. Afterwards, aging simulation was performed for the binders and macro level tests i.e., Rotational Viscosity, Dynamic Shear Rheometer (DSR), and Pneumatic Adhesion Tensile Testing Instrument (PATTI). Additionally, moisture damage-related tests i.e., Texas Boiling Test, nano mechanistic properties test Atomic Force Microscopy, and chemical composition related test Nuclear Magnetic Resonance (NMR) test were conducted. It can be concluded that the selected anti-stripping agent did not exhibit any noteworthy moisture resistance. However, better-performing binder’s source and aggregate type were determined along with correlations among test results. The outcomes of the study will help the agency determine the performance of the chosen anti-stripping agent, as well as a higher-performing binder and aggregate provider.

Comments

Tran-SET Project 22BASU02

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