Small Projects Year 1 (2012-2013)

Laboratory Evaluation of Recycled Concrete as Aggregate in New Concrete Pavements

PI: Haifang Wen (WSU)
Dates: 03/01/2012 – 07/31/2014
Final Project Report: PacTrans-34-WSU-Wen

The Washington State Department of Transportation (WSDOT) has initiated a research project to investigate the use of recycled concrete as aggregates (RCA) in Portland (hydraulic) cement concrete pavements (PCCP). The planned source for the RCA in the project will be from demolished pavements in western Washington, which generally contain very high quality aggregates. Aggregate quality varies across the state, and concrete made with RCA sourced elsewhere will likely have different properties.

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Media Filter Drain: Modified Design Evaluation

PIs: Cara PoorLiv Haselbach (WSU)
Dates: 03/01/2012 – 07/31/2014
Final Project Report: PacTrans-44-WSU-Haselbach

The Washington State Department of Transportation (WSDOT) wishes to modify the media filter drain (MFD) design by changing the crushed gravel specification used in the mix. In order to gain approval from the Washington State Dept of Ecology (Ecology) and incorporate into their standard specifications, metal removal rates for the new design need to be compared to the old design based on accepted stormwater doses.

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Meeting the Demands of Modern Grade Separation and Earth Retention: Characterization of Frictional Interference in Closely-Spaced Reinforcements in MSE Walls

PI: Armin Stuedlein
Dates: 03/01/2012 – 11/01/2013
Final Project Report: PacTrans-24-OSU-Stuedlein

The use of reinforced earth in the United States began in 1972; since then, Mechanically Stabilized Earth (MSE) walls have grown in popularity, and can be found along nearly every state and interstate highway corridor. Due to their inherent flexibility, MSE walls are being constructed to greater heights, in nonlinear geometries, with multiple tiers and with very high reinforcement spacing. For example, the four-tier West MSE wall at Sea-Tac International airport was recently constructed to 46 m height, and is now the tallest wall in the Western Hemisphere. Read More

SSI Bridge: Evaluation of Soil-Structure Interaction Effects of PNW Bridges

PIs: Andre Barbosa, Ben Mason (OSU)
Dates: 03/01/2012 – 11/01/2013
Final Project Report: PacTrans-8-OSU-Mason

The Pacific Northwest (PNW) is prone to large subduction zone earthquakes, large basin-and-range earthquakes, and smaller, shallow, crustal earthquakes. Each of these different types of creates a different type of demand on a soil-bridge system. A subduction zone event, for instance, creates large magnitude, long-duration and long-period events that can damage long, flexible bridges. A shallow, crustal event, when it occurs near a bridge, can create an intense velocity pulse that can damage shorter, more brittle bridges. In addition to the challenges presented by considering multiple earthquake scenarios, the soil underlying bridge columns and abutments can significantly affect the seismic response of the overlying bridge superstructure. To truly examine the seismic performance of a bridge, one must consider soil-structure interaction.

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Use of Blended Synthetic Fibers to Reduce Cracking Risk in High Performance Concrete

PI: Jason Ideker (OSU)
Dates: 03/01/2012 – 11/01/2013
Final Project Report: PacTrans-11-OSU-Ideker

Early-age bridge deck cracking is a major concern for many DOTs throughout the United States and specifically those in the Pacific Northwest. Cracking within the first months of a bridge deck’s lifespan severely hinders its long-term performance and durability, ultimately reducing the sustainability of this crucial piece of transportation infrastructure. Increased maintenance costs, driver interruptions and possible damage to bridge structure are also a result.

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