Fundamental Properties of Asphalts and Modified Asphalts, III

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Volume I: Interpretive Report,” Federal Highway Administration, Contract No. DTFH61-99C- 00022, Chapters 5-7 submitted for publication, March 2006. Western Research Institute, 2008, Asphalt Research Consortium Annual Work Plan for Year 2, April 1, 2008-March 31, 2009. Prepared for Federal Highway Administration, FHWA Contract No. DTFH61-07-H-00009, January 2008. 54
SUBTASK 2-4. LOW-TEMPERATURE PROPERTIES Statement of Problem The contributions of asphalt source (or chemical composition) and environmental conditions to pavement low-temperature performance are not completely understood. Although the current purchase specifications seem to prevent early failure, there is little confidence in any prediction of long-term behavior. Approach Use differential scanning calorimetry and stress relaxation rheometry to determine asphalt component influences on low-temperature properties. This effort will validate the use of lowtemperature stress relaxation tests for determining asphalt mechanical properties. Use a similar approach to determine the influence of oxidative aging on low-temperature properties. Goal The goal of this work is to provide the low-temperature information to support the development of an advanced fundamental understanding of how chemical types, reactions, and structures determine the physical properties of asphalts and the long-term performance of asphalt pavements. Support of FHWA Strategic Goals The work conducted in this subtask to better understand low-temperature asphalt behavior supports the FHWA strategic goal that addresses optimizing pavement performance through the development of longer lasting asphalt pavements, thus decreasing the demand for reconstruction of pavements. Work Conducted This Quarter According to the Contract DTFH61-07-D-00005 documents, Year-2 work on this topic must be shifted to Subtask 3-7. No Task 3 research has been authorized. 55
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Fundamental Properties of Asphalts
Page 5:
TASK 1. COORDINATION The goals of t
Page 8 and 9: Support of FHWA Strategic Goals The
Page 11 and 12: SUBTASK 2-2. AGING SUBTASK 2-2.1. I
Page 13 and 14: To further evaluate how water influ
Page 15 and 16: SUBTASK 2-2.2. SUPPORT OF THE MECHA
Page 17 and 18: Work Conducted This Quarter Introdu
Page 19 and 20: greater than 100 micrometers are co
Page 21 and 22: limestone. Major RA elemental oxide
Page 23 and 24: Log G* at 10 rad/s 8 7 6 5 25°C y
Page 25 and 26: Table 2-2.2.3b. Experiment status m
Page 27 and 28: Table 2-2.2.4b. Experiment status m
Page 29 and 30: (a) (b) PA Intensity (arbitray unit
Page 31 and 32: PA - Carbonyl total peak ht. (1700
Page 33 and 34: SHRP RA (granite) PA spectra of RA
Page 35 and 36: Mastics Several asphalt mastics wer
Page 37 and 38: 4000.0 3600 3200 2800 2400 2000 180
Page 39 and 40: • LTA1 (long term aging Level 1):
Page 41 and 42: The increase in carbonyl at the cen
Page 43 and 44: figure 2-2.2.19 to show the correla
Page 45 and 46: The majority of the results were pr
Page 47 and 48: Hirschfeld, T., 1976, Computer Reso
Page 49 and 50: SUBTASK 2-3. NANOTECHNOLOGY: AFM AN
Page 51 and 52: comprised of tens of thousands of d
Page 53 and 54: to the aggregate fine particle inte
Page 55 and 56: a. Sample, b. cold stage, c. hot st
Page 57: Problems and Solutions to Problems
Page 62 and 63: Background The addition of polyphos
Page 64 and 65: All different aging times were shif
Page 66 and 67: Log a A 2.5 2.0 1.5 1.0 0.5 AAM-1,
Page 68 and 69: KAO Gripper. The minor resonance wa
Page 70 and 71: Dadey et al. [1988] proposed Scheme
Page 72 and 73: Problems and Solution to Problem No
Page 75: SUBTASK 2-6: VALIDATION SITE MONITO
Page 79: TASK 4. INFORMATION DEPLOYMENT SUBT
Page 83: SUBTASK 4-3. RESEARCH DATABASE—CO
Page 89: SUBTASK 4-5. SUPPORT OF THE MECHANI
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