NCHRP 9-57: Experimental Design for Field Validation of Laboratory Tests to Assess Cracking Resistance of Asphalt Mixtures Asphalt Mixture Cracking Tests and Field Validation Survey The Texas A&M Transportation Institute (TTI) is conducting the National Cooperative Highway Research Program (NCHRP) Project 9-57 Experimental Design for Field Validation of Laboratory Tests to Assess Cracking Resistance of Asphalt Mixtures. The principal investigator for the project is Dr. Fujie Zhou (f-zhou@tamu.edu), and the co-principal investigator is Dr. Dave Newcomb (d‑newcomb@tamu.edu). The objective of the project is to identify laboratory tests which can be run as part of mix design procedures to assess cracking resistance of asphalt mixtures and then develop a field experimental design to validate them. As part of this research, we are conducting a web-based survey to identify the current state of practice in your agency on the use of laboratory tests to assess cracking resistance of asphalt mixtures. This survey is being sent to each state Department of Transportation. We estimate that the survey will take approximately 15 minutes to complete. Your response is critical and will make a significant contribution in achieving the objectives of the project. Your information will be synthesized and used to formulate the recommendations of laboratory cracking test candidates for further validation. All responses will be kept confidential and used only for the purposes of research for this project, and results will be released only in aggregate form without identification of specific individual and agency responses. We would appreciate if you could complete the survey by November 20, 2014. Please note that a follow-up phone conversation may be necessary to clarify some answers in the survey, if needed. If you feel you are not the appropriate person to complete this survey, please pass along to the right person in your agency. Any questions or comments about the survey can also be directed to Fujie Zhou or Dave Newcomb. Thank you in advance for your participation. 1. Agency InformationName of Agency* Name of Respondent* First Last Respondent’s TitleRespondent’s Phone*Respondent’s Email Address* 2. Does your agency use one or more tests to assess the cracking potential of asphalt mixtures?* Yes No Please go to question 3.Please go to question 4. 3. If your agency uses one or more tests to assess the cracking potential of asphalt mixtures, please list the test(s). This survey allows space for up to three tests (Tests A, B, and C).Test AA. Designation (either AASHTO, ASTM or agency)*B. What purpose is the test used for?* Research Mix design Production QA/QC acceptance Forensics Others Please list:If so, please list the pass/fail criterion (or criteria):If so, please list the acceptance criterion (or criteria): C. What type of distress is the test related to?* Low-temperature cracking Reflection cracking Bottom-up fatigue cracking Top-down cracking Not sure what distress it is related to D. Is the test temperature chosen by* Fixed at ________________°F LTPP region Project low temperature grade Binder intermediate temperature Others Please list the temerature:Please list: E. How variable is the test?* Highly variable (COV > 30%) Manageably variable (COV between 15 – 30%) Not too variable (COV < 15%) Not sure what the variability of the test is F. Please rate the simplicity of the test considering training requirements, sample preparation, testing, data analysis and interpretation of results.*Very difficultNot too difficultEasyNot sure how simple the test isPlease list the facts leading to your rating above in terms of training requirement, time for sample preparation, testing, data analysis and interpretation of results. G. What is the sensitivity of the test to asphalt mixture characteristics (voids, asphalt content, gradation, etc.)*Very sensitiveModerately sensitiveNot sensitiveNot sure how sensitive test is to mix characteristicsH. Have you constructed any test sections to validate the test method?* Yes No H1. Are the test sections still in place?* Yes No H2. Are asphalt and aggregate from the test sections still available?* Yes No H3. Are there loose mixes from the test sections still available?* Yes No H4. Are there any publications documenting the test sections? If so, please list them below. I. How well does this test relate to performance?* Good — 70% or more of the time it indicates a cracking susceptible mix Fair — Around 50% of the time it indicates a cracking susceptible mix Poor — It is not reliable Not certain how reliable the test is J. How long has your agency used this test?*K. Are there any publications (paper, articles, or reports) available regarding the test? If so, please list one or two of the most recent publications below:Would you like to enter Test B? Yes No Test BA. Designation (Either AASHTO, ASTM or agency)*B. What purpose is the test used for?* Research Mix design Production QA/QC acceptance Forensics Others If so, please list the pass/fail criterion (or criteria):If so, please list the acceptance criterion (or criteria):Please list: C. What type of distress is the test related to?* Low-temperature cracking Reflection cracking Bottom-up fatigue cracking Top-down cracking Not sure what distress it is related to D. Is the test temperature chosen by* Fixed at ________________°F LTPP region Project low temperature grade Binder intermediate temperature Others Please list the temerature:Please list: E. How variable is the test?* Highly variable (COV > 30%) Manageably variable (COV between 15 – 30%) Not too variable (COV < 15%) Not sure what the variability of the test is F. Please rate the simplicity of the test considering training requirements, sample preparation, testing, data analysis and interpretation of results.*Very difficultNot too difficultEasyNot sure how simple the test isPlease list the facts leading to your rating above in terms of training requirement, time for sample preparation, testing, data analysis and interpretation of results. G. What is the sensitivity of the test to asphalt mixture characteristics (voids, asphalt content, gradation, etc.)*Very sensitiveModerately sensitiveNot sensitiveNot sure how sensitive test is to mix characteristicsH. Have you constructed any test sections to validate the test method?* Yes No H1. Are the test sections still in place?* Yes No H2. Are asphalt and aggregate from the test sections still available?* Yes No H3. Are there loose mixes from the test sections still available?* Yes No H4. Are there any publications documenting the test sections? If so, please list them below. I. How well does this test relate to performance?* Good – 70% or more of the time it indicates a cracking susceptible mix Fair – Around 50% of the time it indicates a cracking susceptible mix Poor – It is not reliable Not certain how reliable the test is J. How long has your agency used this test?*K. Are there any publications (papers, articles, or reports) available regarding the test? If so, please list one or two of the most recent publications below:Would you like to enter Test C? Yes No Test CA. Designation (Either AASHTO, ASTM or agency)*B. What purpose is the test used for?* Research Mix design Production QA/QC acceptance Forensics Others If so, please list the pass/fail criterion (or criteria):If so, please list the acceptance criterion (or criteria):Please list: C. What type of distress is the test related to?* Low-temperature cracking Reflection cracking Bottom-up fatigue cracking Top-down cracking Not sure what distress it is related to D. Is the test temperature chosen by* Fixed at ________________°F LTPP region Project low temperature grade Binder intermediate temperature Others Please list the temerature:Please list: E. How variable is the test?* Highly variable (COV > 30%) Manageably variable (COV between 15 –30%) Not too variable (COV < 15%) Not sure what the variability of the test is F. Please rate the simplicity of the test considering training requirements, sample preparation, testing, data analysis and interpretation of results.*Very difficultNot too difficultEasyNot sure how simple the test isPlease list the facts leading to your rating above in terms of training requirement, time for sample preparation, testing, data analysis and interpretation of results. G. What is the sensitivity of the test to asphalt mixture characteristics (voids, asphalt content, gradation, etc.)*Very sensitiveModerately sensitiveNot sensitiveNot sure how sensitive test is to mix characteristicsH. Have you constructed any test sections to validate the test method?* Yes No H1. Are the test sections still in place?* Yes No H2. Are asphalt and aggregate from the test sections still available?* Yes No H3. Are there loose mixes from the test sections still available?* Yes No H4. Are there any publications documenting the test sections? If so, please list them below. I. How well does this test relate to performance?* Good – 70% or more of the time it indicates a cracking susceptible mix Fair – Around 50% of the time it indicates a cracking susceptible mix Poor – It is not reliable Not certain how reliable the test is J. How long has your agency used this test?*K. Are there any publications (papers, articles, or reports) available regarding the test? If so, please list one or two of the most recent publications below: 4. Is your agency planning to implement any new cracking test(s) in the near future?* Yes No If no, please go to question 5.4A. What type of cracking distress will be simulated?* Low-temperature Reflection Bottom-up fatigue Top-down Others Please list.4B. What type of test will be implemented?* Semi-circular bending (SCB) Indirect tension (IDT) Disk-shaped compact tension (DCT) Texas overlay test (OT) Beam fatigue Simplified Viscoelastic Continuum Damage (S-VECD) fatigue Others Please list.4C. When does your agency anticipate implementation?* Within 6 months Within 1 year In 2 years or more 5. Does your agency run any other mixture tests besides cracking tests in evaluating the suitability of an asphalt mix?* Yes No If No, please go to question 6.Please list the tests and associated criteria (if applicable). For instance, Hveem Stability, Marshall Stability, Asphalt Pavement Analyzer, Hamburg Rut Tester, Indirect Tension (IDT), Tensile Strength Ratio, etc.)6. Is your agency interested in possibly hosting a test site to evaluate cracking tests in the future?* Yes (requires 2000 ft or more of contiguous pavement with no ingress or egress, exceptions can be made for existing pavement testing facilities or test sections; and could be part of SPS-10 WMA test sections) No 6A. What type(s) of cracking are you interested in?* Low-temperature Reflection Bottom-up fatigue Top-down 7. Please give any other information you may have to offer concerning cracking tests and their field validation. Δ