The National Academies Press

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From page 72... ... 72 A P P E N D I X A Agency Survey Questions The agency survey questionnaire is presented in this appendix. Block 1: The questions in this section are designed to determine the current status of the use of RAM including RAP and RAS in asphalt mixtures at your agency. Read the entire page →
From page 73... ... Agency Survey Questions 73 • >0.3 (please provide exact value here) • RAM not allowed in surface (or wearing) Read the entire page →
From page 74... ... 74 Use of Recycling Agents in Asphalt Concrete Mixtures Question 8: Does your agency have different criteria, in terms of RAP content in asphalt mixtures, for fractionated and non-fractionated RAP? • Yes • No Question 9: What is the typical RAP content, in terms of RBR, used by your agency in surface (or wearing) Read the entire page →
From page 75... ... Agency Survey Questions 75 • 0.2–0.3 • >0.3 (please provide exact value here) Question 12: What is the maximum RAP content, in terms of RBR, used by your agency in non-surface asphalt mixtures (select best option) Read the entire page →
From page 76... ... 76 Use of Recycling Agents in Asphalt Concrete Mixtures Question 15: What is the typical fractionated RAP content, in terms of RBR, used by your agency in nonsurface asphalt mixtures (select best option) : • <0.1 • 0.1–0.15 • 0.15–0.2 • 0.2–0.3 • >0.3 (please provide exact value here) Read the entire page →
From page 77... ... Agency Survey Questions 77 Question 18: What is the maximum non-fractionated RAP content, in terms of RBR, used by your agency in surface (or wearing) course asphalt mixtures (select best option) Read the entire page →
From page 78... ... 78 Use of Recycling Agents in Asphalt Concrete Mixtures Question 21: What is the typical RAS content, in terms of RBR, used by your agency in surface (or wearing) course asphalt mixtures (select best option) Read the entire page →
From page 79... ... Agency Survey Questions 79 • <0.05 • 0.05–0.1 • 0.1–0.15 • 0.15–0.2 • >0.2 (please provide exact value here) • Prefer to directly upload the corresponding specifications/related documents or provide links to the specifications/documents Please upload the corresponding documents or provide the documentation links. Read the entire page →
From page 80... ... 80 Use of Recycling Agents in Asphalt Concrete Mixtures • 1%–5% • 5%–10% • 10%–15% • 15%–20% • >20% • Unsure Question 28: How many different RA products has your agency used in asphalt mixtures with RAM? • <3 • 3–5 • 5–10 • >10 • Unsure Question 29: What type(s) Read the entire page →
From page 81... ... Agency Survey Questions 81 • RA75 [viscosity@60°C of 4,501 mm2/s – 12,500 mm2/s; please specify product name(s) if known] Read the entire page →
From page 82... ... 82 Use of Recycling Agents in Asphalt Concrete Mixtures Question 34: Please briefly describe the process/framework to add your RAs to the state official approved/qualified product list (e.g., based on previous successful experience and promising field performance in or outside the state, based on the outcomes of a research effort) or please upload the corresponding documents or provide links to the documents if applicable: Question 35: Who determines/specifies the RA type in asphalt mixtures with RAM? Read the entire page →
From page 83... ... Agency Survey Questions 83 Question 38: Who determines/specifies the RA dosage in asphalt mixtures with RAM? Select all that apply: • Agency determined • Contractor determined based on agency requirements • Contractor determined independently • RA producer determined based on agency requirements • RA producer determined independently • Other (please describe briefly) Read the entire page →
From page 84... ... 84 Use of Recycling Agents in Asphalt Concrete Mixtures • By mixture testing [e.g., CT-index testing, semi-circular bending (SCB) test, Hamburg wheel tracking test (HWTT) Read the entire page →
From page 85... ... Agency Survey Questions 85 • Monitoring of field performance • Other (please describe briefly) Question 46: What, if any, premature distresses have you observed for asphalt mixtures with RAs? Read the entire page →
From page 86... ... 86 Use of Recycling Agents in Asphalt Concrete Mixtures Question 49: What type(s) of RA products has your agency used in these applications? Read the entire page →
From page 87... ... Agency Survey Questions 87 • Lack of RA availability • Lack of tests and criteria to approve RA • Lack of tests and criteria to determine dosage rate and/or performance • Poor pavement performance associated with distresses and/or failures • Others (please describe briefly) • No significant roadblocks Question 51: Does your agency have plans to use RAs in future projects? Read the entire page →
From page 88... ... 88 Use of Recycling Agents in Asphalt Concrete Mixtures NOTE: By clicking the "Submit Survey! " button, you will end the survey and will be unable to go back and review or revise your responses. Read the entire page →

From page 72...

... 72 A P P E N D I X A Agency Survey Questions The agency survey questionnaire is presented in this appendix. Block 1: The questions in this section are designed to determine the current status of the use of RAM including RAP and RAS in asphalt mixtures at your agency.