Moisture Susceptibility Evaluation of Asphalt Mixes Based on Image Analysis
Moisture damage in hot mix asphalt (HMA) is one of the major concerns in durability of flexible pavements. Numerous methods were developed to evaluate moisture susceptibility of HMA in last decades. Some of these methods are simpler and less costly (qualitative tests) and some of them are more reliable. In this research, a digital image analysis approach was utilized to convert boiling water test (ASTM D3625) from visual rating to objective evaluation. Digital images captured from mixtures were processed and analyzed to identify the amount of stripping percentages. Some laboratory tests were conducted on specimens prepared from different types of aggregates to compare the stripping percentages obtained from image analysis of the boiling water test and modified Lottman test (AASHTO T283) results. In AASHTO T283 test, in addition to indirect tensile strength, the Dynamic Modulus E* test and the Marshall Stability test were performed; therefore, three criteria including tensile strength ratio (TSR), E* stiffness ratio (ESR) and retained marshall stability (RMS) were used to compare the results of two methods. The dynamic modulus test was conducted in indirect tension mode by assumption of Poisson’s ratio and a linear viscoelastic solution was used for the E*calculation. Findings showed that the results of boiling water test have significant relationship with TSR and ESR. Good correlation was found between three tests; however, the results of boiling test did not show significant relationship with RMS.
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Supplemental Notes:
- This paper was sponsored by TRB committee AFK40 Characteristics of Asphalt-Aggregate Combinations to Meet Surface Requirements.
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Amelian, Soroosh
- Abtahi, Sayyed Mahdi
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Conference:
- Transportation Research Board 93rd Annual Meeting
- Location: Washington DC
- Date: 2014-1-12 to 2014-1-16
- Date: 2014
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; Photos; References; Tables;
- Pagination: 16p
- Monograph Title: TRB 93rd Annual Meeting Compendium of Papers
Subject/Index Terms
- TRT Terms: Durability; Dynamic modulus of elasticity; Flexible pavements; Hot mix asphalt; Marshall test; Moisture damage; Poisson ratio; Stripping (Pavements); Viscoelastic materials
- Subject Areas: Highways; Materials; I30: Materials;
Filing Info
- Accession Number: 01515127
- Record Type: Publication
- Report/Paper Numbers: 14-1157
- Files: TRIS, TRB, ATRI
- Created Date: Feb 21 2014 3:16PM