REQUEST FOR PROPOSAL:
PROPOSAL DUE DATE: JULY 16, 2021 no later than 4:00 P.M. (CDT)(USA)
PROPOSAL SUBMIT TO: Please E-mail: ACPTP@iastate.edu
“Mitigating Potential Alkali-Silica Reaction (ASR) Expansion in Airfield Concrete Pavements”
National Concrete Pavement Technology Center (CP Tech Center)
under Cooperative Agreement with the
Federal Aviation Administration (FAA)
Airport Concrete Pavement Technology Program Request for Proposal (RFP) ACPTP-2021-1
Dr. Peter Taylor,Project Director-ACPTP | E-mail: ptaylor@iastate.edu | Phone: 515-294-9333
RESEARCH PROBLEM STATEMENT:
1990s & early 2000s
Alkali-silica reaction (ASR) in airfield concrete pavements caused premature deterioration of concrete on numerous airfields around the country.
Research showed that Class F fly ash & slag cement were
effective at mitigating ASR expansion at appropriate dosage levels.
The Federal Aviation Association (FAA) incorporated aggregate testing protocols in concrete pavement construction specifications to identify and mitigate expansion in suspected reactive aggregates
• ASTM C1260 and C1567 used as base testing protocols
• Length of testing modified from standard 14 days to 28 days of soaking in sodium hydroxide
• ASTM C1567 test modified to include the combined materials in the proportions used in the concrete mixture
• Time-consuming current testing protocols often impact project schedules
Since the inclusion of these protocols in concrete specifications for airfields,
no known new cases of ASR have been identified in airfield concrete pavements.
However, debate continues on the appropriateness of the current testing protocols. The AIM of the work described in this RFP is to address the need for alternative traditional Class F fly ash and slag cement for mitigation of reactive aggregates. Consideration should be given to investigating materials such as reclaimed fly ash, nano-materials, recycled glass, rice husk ash, woolastonite, organic materials, or combinations thereof. Effectiveness of these materials must also be evaluated in light of the increasing use of portland limestone cements in pavement applications.
OBJECTIVES of the RESEARCH:
• Identify and assess approaches for mitigation of ASR in mixtures containing reactive aggregates in the absence of fly ash and slag cement
• Identify and assess methods or protocols to assess mitigation plans for a given aggregate
• Review and recommend protocols and practices adopted by other agencies for prequalifyingaggregates, and to develop mitigation guidance based on the reactivity of a given aggregate source
TASKS:
• Investigator will be responsible for developing a series of sub-tasks that when completed will result in completion of the objectives of this study within the time and budget available
• Proposal does not necessarily need to reflect the exact budget or the performance period indicated in the RFP
• Any deviation must be justified and clearly explained
• Tasks needed to accomplish this objective (at a minimum):
—Task 1 – Literature Review
—Task 2 – Work Plan
—Task 3 – Project Implementation
—Task 4 – Draft and Final Report
REPORTS will be required:
• Literature review and work plan for Project Technical Panel review and approval
• Quarterly progress reports detailing work conducted and data collected
• Draft final report for Project Technical Panel review and approval
• Final 508 compliant report
• PROPOSAL DUE DATE: JULY 16, 2021 no later than 4:00 P.M. (CDT)(USA)
• PROPOSAL SUBMIT TO: Please E-mail: ACPTP@iastate.edu
• ESTIMATED NOTICE TO PROCEED DATE: SEPTEMBER 1, 2021
• QUESTIONS ON RFP: Please E-mail prior to July 9, 2021: ACPTP@iastate.edu
(PDF proposal plus spreadsheet, see proposal instructions)
For DETAILS on the RESEARCH, OBJECTIVES, TASKS, REPORTS, REFERENCES, PROPOSAL instructions, and to review the 3-page report, please go to PDF: https://intrans.iastate.edu/app/uploads/sites/7/2021/06/Mitigating-Potential-ASR-in-Airfield-Concrete-Pavements-RFP.pdf