Low-Cost Rural Surface Alternatives Phase III: Demonstration Project TR-721
The objectives of the proposed Phase III project are to construct and monitor several more test sections around Iowa using additional stabilization methods employing different types of virgin and recycled materials. The economic and initial versus life-cycle maintenance costs for the different methods will be studied as was done in the Phase II project (TR-664). It is proposed that four to five additional demonstration sections be constructed in Hamilton County, including one control section. Similar demonstration sections will then be built in three additional counties distributed around Iowa (a total of 16 to 20 test sections over four counties), to cover a range of different aggregate sources, subgrade soil types, and weather conditions. All demonstration sections will then be tested and monitored through two winter freeze-thaw cycles, and the construction and maintenance costs will be tracked and analyzed as was done in the Phase II project. The most effective and economical stabilization methods will be identified, and a "How-To" guide will be written for county and district engineers to implement the stabilization methods. Additionally, tests will be performed at several existing macadam-based granular roadways around Iowa, to try to identify the surface-course material properties and subgrade conditions that lead to good long-term performance of non-bitumen macadam bases under granular-surfaced roads.
Language
- English
Project
- Status: Active
- Funding: $151428
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Contract Numbers:
TR-721
Add 604
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Sponsor Organizations:
Iowa Department of Transportation
800 Lincoln Way
Ames, IA United States 50010 -
Managing Organizations:
Center for Transportation Research and Education
2711 South Loop Drive, Suite 4700
Ames, IA United States 50010-8664 -
Project Managers:
Waid, Danny
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Performing Organizations:
Center for Transportation Research and Education
2711 South Loop Drive, Suite 4700
Ames, IA United States 50010-8664 -
Principal Investigators:
Ashlock, Jeramy
Ceylan, Halil
Cetin, Bora
- Start Date: 20170401
- Expected Completion Date: 20201231
- Actual Completion Date: 0
Subject/Index Terms
- TRT Terms: Aggregates; Alternatives analysis; Demonstration projects; Freeze thaw tests; Life cycle analysis; Recycled materials; Rural highways; Soil stabilization; Subgrade (Pavements); Surface course (Pavements); Test sections; Weather conditions
- Geographic Terms: Iowa
- Subject Areas: Geotechnology; Highways; Materials; Pavements;
Filing Info
- Accession Number: 01702858
- Record Type: Research project
- Source Agency: Iowa Department of Transportation
- Contract Numbers: TR-721, Add 604
- Files: RIP, STATEDOT
- Created Date: Apr 24 2019 11:32AM