APPENDIX A
Agency Survey Questions

The agency survey questionnaire is presented in this appendix.

Part A: State-of-the-Practice Related to the Use of Full-Depth Reclamation

Question 1: Does your agency use (or has used within the past 5 years) Mechanical FDR or FDR for pavement rehabilitation?

• Yes, our agency has used both Mechanical FDR and FDR
• Yes, our agency has used Mechanical FDR only
• Yes, our agency has used FDR only
• No, our agency does not use either Mechanical FDR or FDR

Note: For the remainder of this survey, the use of the term “FDR” refers to both FDR and Mechanical FDR, unless otherwise specified.

Question 2: How many years of experience does your agency have with FDR?

• <5
• 5–10
• 10–20
• >20

Question 3: What is the approximate number of lane miles per year that are recycled using FDR by your agency? (select best option):

• <50
• 50–100
• >100
• Unsure

Question 4: What are the average daily traffic levels on the roadways for which your agency conducts FDR? – select all that apply:

• <2,500
• 2,500–5,000
• 5,000–10,000
• 10,000–20,000
• 20,000–30,000
• >30,000
• Unsure

Question 5: Which factor(s) does your agency consider to determine when FDR is used? – select all that apply:

• Existing ride quality of the pavement
• Existing primary distress(es) present in the pavement
• Existing pavement structure (layers and their thicknesses)
• Existing pavement soil subgrade type
• Initial/construction cost
• Life cycle cost or cost/benefit
• Other (please specify)

Question 6: For which existing primary distress(es) does your agency carry-out FDR? – select all that apply:

• Base failure
• Fatigue cracking
• Longitudinal and transverse cracking
• Potholes
• Rutting
• Other (please specify)

Question 7: Before conducting FDR, does your agency perform a pre-design pavement investigation? (select best option):

• Yes – always
• Yes – sometimes
• No
• Unsure

Question 8: When conducting a pre-design investigation for FDR, what testing is conducted? – select all that apply:

• Evaluation of strength/stiffness of layers of existing pavement structure (such as, Falling Weight Deflectometer or Dynamic Cone Penetrometer testing)
• Evaluation of the thickness of layers of existing pavement (such as Ground Penetrating Radar testing or coring)
• Sampling of material (for verification of layers)
• Other (please specify)

Question 9: Which of the following stabilizing agents or additives are used in FDR projects by your agency? – select all that apply:

• Calcium chloride
• Cement
• Fly ash
• Emulsified asphalt
• Foamed asphalt
• Lime (or lime kiln dust)
• Quarry by-products
• Other (please specify)

Question 10: What type of pavement design methodology does your agency use when designing a pavement with FDR? (select the most commonly used)

• Our agency does not use a design methodology – Our agency uses a fixed pavement cross-section for pavement rehabilitated with FDR

• Empirical design
• Mechanistic-empirical design
• Other (please provide more details)

Question 11: How does your agency determine FDR layer property values (layer coefficient or modulus) for pavement design? (select best option):

• Values for FDR are fixed across our state
• Values for FDR are determined project by project
• Values for FDR are fixed based on the stabilizing agent used (for example, our state uses one value if emulsion is used, one if cement is used, etc.)
• Other (please specify)

Question 12: What layer coefficient or modulus value (or range of values) does your agency use for Mechanical FDR and FDR? Please include units in your response.

• Mechanical FDR: (please input value and units)
• FDR: (please input value and units)

Question 13: What type of mix design does your agency use for FDR projects? (select all that your agency has used within the past 5 years):

• Marshall
• Superpave
• Hveem
• Wirtgen
• Our agency does not perform the mix design, the contractor does
• Other (please specify)

Question 14: Does your agency have a standard specification for mix design of FDR?

• Yes, and I can provide a link or brief description
• Yes, and I can upload a file
• No
• Unsure

Question 15: Please provide a link to OR please upload the file with your agencyʼs FDR mix design standard specification.

• Please provide the link(s) to the document OR please upload the corresponding documents

Question 16: Does your agency have a standard specification for materials and construction of FDR?

• Yes, and I can provide a link or brief description
• Yes, and I can upload a file
• No
• Unsure

Question 17: Which of the following best describes the type of materials and construction standard specification for FDR of your agency?

• Method specification
• End result specification
• Quality assurance specification (Incentive based)

• Performance-based specification and post-construction performance (i.e., warranties, maintenance agreements)
• Other (please specify)

Question 18: Please provide a link to OR please upload the file with your agencyʼs FDR materials and construction standard specification.

• Please provide the link(s) to the document OR please upload the corresponding documents

Part B: State-of-the-Practice Related to the Use of Stabilizing Agents in Full-Depth Reclamation

Question 19: Who determines/specifies the stabilizing agent type in FDR applications? (select best option):

• Agency determined
• Contractor determined based on agency requirements
• Contractor determined independently
• Unknown
• Other (please describe briefly)

Question 20: What is the primary factor your agency uses to determine which stabilizing agent to use in an FDR project? (select best option):

• Traffic level
• Availability of material
• Historic use or past performance
• Life cycle cost analysis
• Mix design results
• Other (please specify)

Question 21: Who determines/specifies the stabilizing agent dosage in FDR applications? (select best option):

• Agency determined
• Contractor determined based on agency requirements
• Contractor determined independently
• Unknown
• Other (please describe briefly)

Question 22: How is the stabilizing agent dosage in an FDR project determined? (select best option):

• Fixed dosage based on stabilizing agent type (please briefly describe)
• Dosage determined by performing a mix design
• Other (please specify)

Part C: State-of-the-Practice Related to Post-Construction for Full-Depth Reclamation

Question 23: What type of QA process does your agency use for FDR construction?

• No QA process
• Agency inspection and testing only

• Contractor QC only
• Contractor QC and agency inspection/testing
• Other (please specify)

Question 24: What parameters are required as part of agency inspection and testing? – select all that apply:

• Moisture content
• Compaction (in-situ density)
• Gradation of pulverized material
• Mechanical characterization
• Stabilizing agent amount
• Depth
• Cross-slope
• Surface properties (such as smoothness or deviation from a straight edge) of the FDR layer (post-compaction, pre-overlay)
• Unknown
• Other (please specify)

Question 25: What parameters are required as part of contractor QC? – select all that apply:

• Moisture content
• Compaction
• Gradation of pulverized material
• Mechanical characterization
• Stabilizing agent amount
• Depth
• Cross-slope
• Surface properties (such as smoothness or deviation from a straight edge) of the FDR layer (post-compaction, pre-overlay)
• Unknown
• Other (please specify)

Question 26: How does your agency determine when to allow traffic or place surfacing on the FDR layer? – select all that apply:

• A set amount of time
• Raveling resistance (e.g., short-pin raveling test)
• Shear resistance (e.g., long-pin shear test)
• Modulus/stiffness criteria
• Moisture content criteria
• Other (please specify)

Question 27: What testing does your agency conduct to evaluate the performance of FDR projects over time? – select all that apply:

• Non-destructive field testing (such as Falling Weight Deflectometer, etc.)
• Visual evaluation of distresses over time
• Evaluation of ride quality
• Testing of field cores
• No performance evaluation conducted
• Other (please specify)

Question 28: Does your agency routinely utilize any treatments to reduce the potential for cracking in asphalt overlays on FDR?

• Yes (please briefly describe which treatments)
• No
• Unsure

Question 29: Does your agency employ any efforts or plan to employ any efforts to quantify the environmental, economic, or ecological impacts (sustainability) or using FDR? – select all that apply:

• Life cycle analysis
• Life cycle cost analysis
• We do not quantify the sustainability of FDR projects
• Unknown
• Other (please specify)

Part D: Identification of Challenges and Future Plans

Question 30: What challenges to successfully implementing FDR projects have you experienced? (select all that apply):

• Lack of agency experience
• Lack of contractor expertise
• Lack of mix design methods and engineering-based design procedures
• Lack of tests and criteria to determine dosage of stabilizing agents and/or performance
• Poor performance of previously constructed FDR rehabilitated pavements
• Lack of funding for planning/pre-construction
• No significant challenges
• Other (please describe briefly)

Question 31: Does your agency have plans to carry-out FDR in future projects?

• Yes (please briefly describe the number and type planned over the next year)
• No
• Unsure

Question 32: The synthesis will also include case examples illustrating agency practices of FDR. The development of the case example(s) will require an additional follow-up interview. Agencies will be provided the opportunity to review the case example write-up for accuracy. Would your agency be willing to participate as a case example?

• Yes
• No

Question 33: Contractors that perform FDR will also be surveyed as part of this synthesis. We would appreciate it if you can provide contact information (name and email) of contractors that your agency has worked with on FDR projects.

• (please provide contact information)

Question 34: If you have any additional information or thoughts you would like to share regarding this topic, please do so here:

• (please provide additional information or thoughts regarding FDR)

END OF SURVEY

Please click on the “Submit Survey!” button to submit your survey.

NOTE: By clicking “Submit Survey!” button here you will end the survey and you will be unable to go back and review or revise your responses.

Thank you for your willingness to participate in this NCHRP Synthesis Topic 55-04!

While names of the survey respondents will be kept anonymous, agencies responses will be identified in the reports.

If you need any additional information about this survey or about the project, please contact Dr. Jo E. Sias.