Active Projects
BRIDGE PROJECTS
A NOVEL METHODOLOGY FOR STRUCTURAL OPTIMIZATION OF BRIDGE DECKS AGAINST CORROSION
Project Objectives
Create and deploy a novel toolset for the prediction of corrosion based on the structural features of a selected bridge deck. Physics-based numerical models for the prediction of corrosion in reinforced concrete decks will be developed. This new modeling framework will be embedded in an optimization framework to develop new best practices for bridge deck corrosion mitigation to guide both the design of new systems and the maintenance of existing ones. The ultimate goal is to identify the complex interrelationships between the temporal and spatial frequency of salt application and the corrosion mitigation strategies in place. Then, this new information will be combined with reliability-based optimization to provide guidelines for the operational control of bridge decks subject to corrosion mechanisms.
Dr. John Brigham: brigham@pitt.edu
GEOTECH PROJECTS
Development of a Roadway Landslide Inventory and Analytical Tool for Southwestern Pennsylvania
Project Objectives
Landslides are a major disruption to road networks and infrastructure in Southwestern Pennsylvania due to geological conditions, changes in the distribution of precipitation, and anthropogenic modifications to the landscape. Given the scale of this disruption, transportation agencies and local governments have invested significant resources in landslide repair. However, this problem cannot b e examined comprehensively as information about landslides is spread across multiple government and non-government agencies and organizations. A unified inventory of landslide data that incorporates extensive geophysical information will enable interested party access to a comprehensive and consistent set of information that can guide mitigation efforts based on the cumulative experience across the region. It will also help identify the most important causes for slope failure and/or locations that are most likely to fail, and advance an effective proactive approach to landslide monitoring and mitigation.
This project aims to: (1) Design a structure for a unified inventory of landslides that addresses the needs of stakeholders; (2) Initiate a data collection effort focused on historical landslide observations to establish a working database and document workflows that enable the collection, sharing, and analysis of new data across agencies; 3) Demonstrate the power of comprehensive data through evaluation of collected data.
Dr. Daniel Bain: dbain@pitt.edu
MATERIALS PROJECTS
DEVELOPING LIGHT-WEIGHT AND HIGH-PERFORMANCE METAMATERIAL CONCRETE
Project Objectives
Develop a “metamaterial Light-Weight-Concrete (LWC)” technology to fabricate lightweight and high-performance structural elements, with potential applications for pavement systems, bridge decks, and prefabricated bridge elements. A suite of metamaterial LWC systems with tunable compressive strength and ductility will be evaluated. A range of selected metamaterial lattices will be 3D printed and extensive numerical and experimental studies will be performed to evaluate and predict the mechanical properties of LWC cubes and beams reinforced by the MM lattices. The goal is to design LWC materials with a minimum compressive strength of 50 MPa, minimum toughness of 10 kN⋅mm, and maximum unit weight of 1200kg/m3.
Dr. Amir Alavi: alavi@pitt.edu
Material Compatible Repairs Evaluation
Project Objectives
Partial-depth repair of concrete pavements and bridge decks is a rehabilitation technique that restores localized surface distresses in the upper one-third to one-half of a concrete slab depth. With proper design and construction, partial-depth repair should last as long as the surrounding concrete pavement making it a cost-effective and sustainable alternative to more costly and invasive rehabilitation options. Past studies have identified two major reasons for premature failures of partial depth repairs: (a) inability to achieve and keep adequate bond between the repair and the existing pavement due to improper repair material selection; and (b) incorrect repair dimensions.
To address the incompatibility issues between in-situ concrete and repair material, a previous research project entitled “Material Compatible Repairs (MCR) for Concrete Pavements and Bridge Decks” was conducted as part of IRISE’s first year program. Based on laboratory studies, the research shed light on the importance of using MCRs and best practices to develop a performance engineered repair material (PERM) to be used for the MCR. In this project, extensive and comparative testing is needed to validate and demonstrate the results of this previous research in the field. Concurrently, for the same repairs, investigate the ability of ultrasonic tomography testing to provide reliable information for required partial depth repair dimensions and evaluate bond condition after repair placement.
Dr. Steven Sachs: sgs15@pitt.edu
PAVEMENTS PROJECTS
PREDICTION OF DOWEL CORROSION AND EFFECT ON PERFORMANCE OF CONCRETE PAVEMENTS
Project Objectives
1) Determine corrosion mechanisms and critical factors in dowels using currently available models and databases, 2) Experimentally investigate corrosion development in a novel accelerated load test to quantify resulting loss of dowel performance, 3) Build predictive performance models using modeling and experimental results, which will be validated with field data, 4) Create a set of guidelines based on the results to inform pavement design and management practices.
Dr. Julie Vandenbossche: jmv7@pitt.edu
DESIGN AND CONSTRUCTION OF TWO-LIFT CONCRETE PAVEMENTS FOR PENNSYLVANIA
Project Objectives
Two-lift concrete pavement construction, a technique that involves the placement of two wet-on-wet layers of concrete with different mixes, can balance the need for different materials in different depths of the concrete slab. This project will develop design and construction recommendations for two-lift concrete pavements for Pennsylvania conditions. This will involve testing appropriate concrete mixes for both top and bottom layers with a focus on the former’s high-performance needs and the latter’s economical and sustainable aspects. An experimental section will be evaluated, focusing on the challenges of working consecutively with two pavers and two concrete mixes. A comprehensive evaluation of the bonding conditions between the two layers will be performed and documented using non-destructive methods. The potential cost saving and reduction in carbon footprint will be evaluated.
Dr. Lev Khazanovich: lev.k@pitt.edu
SEAL COAT FOR ASPHALT PAVEMENTS: BEST PRACTICES AND EXPERIENCE
Project Objectives
Develop material selection, construction, and inspection guidelines for successful and uniform use of seal coats in Pennsylvania. Best practices and experiences with the use of seal coats for asphalt pavements will be collected from various Departments of Transportation and experienced contractors with emphasis on the “do’s and don’ts” regarding seal coat design, construction and inspection. Current state and local practices from government and contractors will be assembled and visual surveys and forensic analysis of sections presenting seal coat performance issues conducted. These experience datasets will be compared to come up with recommendations for improving seal coat quality in Pennsylvania.
Dr. Eshan Dave: eshan.dave@unh.edu
Joint Design Optimization
Project Objectives
Joint performance is dependent on the interaction between the individual elements of the pavement structure, such as load transfer, drainage, joint reservoir/sealant design, etc. Yet, traditionally, most of these individual elements are designed without regard to these interactions. For example, the selection of the joint sealant type and the design of the sealant reservoir must consider the pavement structure (base type, load transfer, slab length, dimensional stability of the concrete, etc.), the anticipated level of traffic and the expected opportunities for maintenance. Current sealant types, reservoir designs and construction practices will be evaluated to determine the effectiveness of these practices and identify opportunities for improvement.
Joint performance is also dependent on the ability of the dowel bars to function properly. For this reason, corrosion-resistant dowel bars are being used more commonly. Current design procedures do not account for the additional life achieved by using these long-life dowel bars. Corrosion models and dowel corrosion performance data will be identified and evaluated to determine which of these can be incorporated into models currently available for predicting faulting.
Dr. Julie Vandenbossche, PE: jmv7@pitt.edu
WORKER SAFETY PROJECTS
A NOVEL IMMERSIVE VIRTUAL REALITY PLATFORM FOR HEALTH & SAFETY TRAINING OF CONSTRUCTION WORKERS
Project Objectives
Develop an interactive and immersive training platform using Virtual Reality (VR) to train construction workers, inspectors and other project site staff about the dangers caused by run overs, back overs, caught-in or -between, and struck-by accidents in the highway construction industry. The novel platform will immerse users into a detailed digital reproduction of a given construction site that will materialize a selected health & safety (H&S) training module in an immersive environment, while directing the users attention to observe and identify possible hazards. Such hazards will be randomly placed inside the simulation, where they will need to be identified by the users. The possibility of employing formal attention analysis metrics by means of new generation VR gear equipped with eye tracking technology will also be investigated.
Dr. Alessandro Fascetti: fascetti@pitt.edu
Other
Developing and Applying Methodologies to Quantify the Benefits of IRISE Projects
This project aims to develop and apply unique methodologies to quantify the benefits of IRISE's completed and in-process research projects. By focusing on up to five selected projects, the team will evaluate the improvements in transportation infrastructure longevity and reductions in life cycle costs resulting from IRISE research. The project involves analyzing case studies, crash data, and statewide construction data to measure the impact of research findings. It will also provide an evaluation and recommendation for broad-scale implementation of these findings.
