Development and Validation of the IDEAL Cracking Test
This paper summarizes the development and validation of the IDEAL cracking test (IDEAL-CT) method. The test was evaluated for its ability to be sensitive to mixture properties that control performance. The IDEAL-CT is similar to the traditional indirect tensile strength test, and it is run at the room temperature with cylindrical specimens at a loading rate of 50 mm/min. in terms of cross-head displacement. Any size of cylindrical specimens with various diameters (100 or 150 mm) and thicknesses (38, 50, 62, 75 mm, etc.) can be tested. For mix design and laboratory quality control/quality assurance, the authors proposed to use the same specimen size as the Hamburg wheel-tracking test: 150 mm diameter and 62 mm height with 7±0.5% air voids, since agencies are familiar with molding such specimens. Either lab-molded cylindrical specimens or field cores can be directly tested with no need for instrumentation, gluing, cutting, notching, coring or any other preparation. Findings from the validation suggest that the IDEAL-CT is a simple, practical, and efficient cracking test that can be performed with regular indirect tensile strength test equipment. The IDEAL-CT is sensitive to key asphalt mix components and aging, and it also has much lower coefficient of variation (COV) than traditional repeated load cracking tests. The IDEAL-CT correlated well with two other cracking tests—Texas OT and Illinois I-FIT. The IDEAL-CT also correlated well with field performance in terms of fatigue, reflective, and thermal cracking. Currently, several departments of transportation are either evaluating or considering the IDEAL-CT for potential adoption.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00978515
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Authors:
- Zhou, Fujie
- Im, Soohyok
- Hu, Sheng
- Publication Date: 2019-9
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; References; Tables;
- Pagination: pp 1-21
- Monograph Title: Relationship Between Laboratory Cracking Tests and Field Performance of Asphalt Mixtures
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Serial:
- Transportation Research Circular
- Issue Number: E-C251
- Publisher: Transportation Research Board
- ISSN: 0097-8515
Subject/Index Terms
- TRT Terms: Asphalt mixtures; Asphalt pavements; Cracking; Laboratory tests; Test procedures
- Subject Areas: Highways; Materials; Pavements;
Filing Info
- Accession Number: 01722466
- Record Type: Publication
- Files: TRIS, TRB, ATRI
- Created Date: Nov 15 2019 11:35AM