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Showing 1 to 15 of 15 for “"Flexibility Index"”.
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An analysis of impact factors on the Illinois flexibility index test
… for Transportation has developed the Illinois Flexibility Index Test (I-FIT) to evaluate the cracking potential of an asphalt concrete mixture. The I-FIT method is in its early stages, and various impact factors on the test’s output need to be understood. While laboratory-produced specimens can …
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Flexibility index threshold optimization for various asphalt mixes and geographic locations
Made available in DSpace on 2019-08-23T20:48:27Z (GMT). No. of bitstreams: 2 MOHAMEDALI-THESIS-2019.pdf: 954913 bytes, checksum: b30d9d58637a8d4d0463520f164d9e0f (MD5) LICENSE.txt: 4215 bytes, checksum: 2cc1d3148776785b166c87de9a7ec48b (MD5) Previous issue date: 2019-04-26
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The Development of Initial Asphalt Mixture Acceptance Criteria Using the SCB test and the I-FIT Test
… mixture design method in Arkansas. The Illinois Flexibility Index Test (I-FIT) was the test chosen to analyze for this research. Two aging methods were tested, a short term oven aging (AASHTO R30 ST) and a long term oven aging (NCAT) method. Six asphalt mixtures were selected to be tested. The …
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Development of a performance-based test method for quantification of cracking potential in asphalt pavement materials
… materials. A practical test method, the Illinois Flexibility Index Test (I-FIT), was developed, and found to appropriately distinguish between variations in mix design and characteristics. The I-FIT method is a modification of the semicircle bending beam (SCB) test; the modification includes the …
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Impact of laboratory simulated aging on asphalt concrete flexibility
… investigated in this study using the Illinois Flexibility Index Test (I-FIT) after the specimens were subjected to various lab-simulated long-term aging conditions. The flexibility index (FI), an outcome of the I-FIT and a measure of the AC flexibility. decreases consistently after long-term …
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Laboratory assessment of asphalt concrete durability utilizing balance mix design
… of the studies mixes using the Illinois Flexibility Index Test (I-FIT) and the Hamburg Wheel Track Test (HWTT). Additionally, mix stiffness and moisture damage susceptibility were evaluated using the output data from I-FIT and HWTT, respectively. The tests results were analyzed using the …
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Attending Your Own Funeral: Effects of a Brief ACT-Based Eulogy-Writing Exercise on Delay Discounting, Psychological Flexibility, and Value Clarity
… delay discounting (H1), increase psychological flexibility (H2), and increase value clarity (H3) relative to control. These outcomes were assessed pre- and post-task using the Monetary Choice Questionnaire, the Personalized Psychological Flexibility Index, and the Value Clarity Questionnaire, …
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Investigation of cracking resistance of recycled Superpave mixtures
… energy, creep compliance, energy ratio, and flexibility index but high resilient modulus. These results indicate that mixtures containing 10% RAP and 5% RAS are stiffer, more prone to cracking, and tend to absorb less fracture energy. Mixtures with 25% RAP and no RAS showed the opposite …
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Balancing asphalt mixes containing recycled materials for optimum field performance
… Hamburg wheel tracking test, and the Illinois flexibility index test (I-FIT) was conducted to evaluate thermal cracking susceptibility, rutting, and cracking resistance, on plant-mixed lab-compacted (PMLC) mixes and three sets of field cores. The extensive exploratory data analysis on creep …
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Quantification of the Role of The Effective Binder in the Performance of RAP – WMA Mixtures
… as measured by the IDT-HT strength and the flexibility index obtained from the SCB test. Binder selection limits were developed for lab-produced WMA-RAP mixtures based on the Glover-Rowe parameter. Finally, a validation study was conducted using data from four different projects, including a …
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The effect of hydrated lime on moisture susceptibility and aging of hot mix asphalt: mastic to mixture scale
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-08-01
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Optimization of asphalt concrete mix design to control cracking and rutting potential
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-12-01
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Laboratory characterization and field performance of hot in-place recycled mixtures
… profiling for predicting International Roughness Index (IRI) and Condition Rating Survey (CRS). FWD was conducted at every 61 m for the evaluation of pavement structural capacity of existing pavement, post-HIR and post-overlay conditions. Smoothness measurements for existing and the post-HIR …
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Effect of specimen geometry and test configuration on the fracture process zone for asphalt materials
… to achieve a balance mix design. The Illinois Flexibility Index Test (I-FIT) protocol was developed at the Illinois Center for Transportation (ICT) and published as American Association of State Highway and Transportation Officials provisional standards (AASHTO TP 124) to evaluate the cracking …
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Assessment of Fracture Resistance of Asphalt Overlays through Heavy Vehicle Simulator and Laboratory Testing: Synthetic Fiber and Rubber Modified SMA Mixes
… (IDEAL-CT), which measures the Cracking Test index (CTindex); (2) Semicircular Bend Test-Illinois (SCB-IL), which measures the critical strain energy release rate (Jc); (3) Semicircular Bend-Louisiana Transportation Research Center (SCB-LTRC), which measures the Flexibility Index (FI); and (4) …