Lundi, 13 Juillet, 2020 - 13:30
HFSTs are pavement surfacing systems that provide skid-resistant, and deck sealing properties not typically associated with conventional materials. The spot application of a thin layer of durable, high friction aggregates as a topping on specially engineered resin or a polymer binder affords long-lasting traction (as stated by manufacturer information), while...
Lundi, 13 Juillet, 2020 - 13:30
Chloride infiltration into concrete is the major cause of corrosion induced delamination in steel reinforced bridge decks and repairing delaminated concrete is a major cost factor in bridge deck rehabilitation.
The TRB Highway Innovations Deserving Exploratory Analysis Program's Determining Bridge Deck Chloride Quantities Using Ground Penetrating Radar...
Lundi, 25 Mai, 2020 - 13:15
Load rating is the process of determining the safe load-carrying capacity of a bridge; however, when plans and details are insufficient to determine the overall capacity of the structure, alternative methods must be used to infer what the live load capacity is. Two viable methods allowed by the AASHTO Manual for Bridge Evaluation are the commonly used but...
Lundi, 25 Mai, 2020 - 13:15
Adjacent box beam bridges are economical bridge systems for accelerated bridge construction. The box beams are constructed at precast plants and are traditionally connected by a shear key filled with grout. This system is typically used for short spans with low clearance restrictions. However, due to the grout deteriorating and debonding from the precast...
Mardi, 19 Mai, 2020 - 15:00
The Minnesota Department of Transportation (MnDOT) constructed its first glass fiber polymer (GFRP) reinforced bridge deck on MN 42over Dry Creek just north of Elgin, Minnesota. Successful implementation of the GFRP reinforced bridge decks would eliminate the steel corrosion problems that often shorten the life of the deck. Although there has been wide use of...
Lundi, 4 Mai, 2020 - 14:15
This webinar, presented on 29 April 2020, discusses the merits of three options to advance the future of PBS access in Australia as it relates to bridges. The webinar explains the role that PBS bridge formulae play in vehicle design and approval. It looks at the historical development of the formulae and under which circumstances it most accurately predicts...
Lundi, 20 Avril, 2020 - 13:45
This “state of the practice” report evaluates and summarizes current methods of grade control at culverts with photographic examples of each type of culvert grade control. It is intended to be used as a reference to help engineers in the preliminary design stage select the most cost-effective and constructible type of culvert grade control...
Lundi, 20 Avril, 2020 - 13:45
This study demonstrated that Type 2205 stainless steel strand can be used as a replacement for conventional ASTM A416 steel strands where an increase in service life is required. The benefit and practicality of using Type 2205 stainless steel strand in prestressed piles were determined from two tasks performed in this study.
First, a corrosion...
Mercredi, 15 Avril, 2020 - 13:15
Researchers at the University of Nevada, Reno explored the feasibility of a self-sensing adaptive bridge bearing system. In this system, rubber bearings and sensors made of a magnetorheological elastomer (MRE) (or controllable rubber) respond to loads and vibrations through automated changes in stiffness. The system has a wireless, self-sensing capability that...
Lundi, 6 Avril, 2020 - 13:45
Corrosion of prestressed concrete reinforcement in bridge components is a major concern for state transportation agencies. The severity of the problem is amplified by the fact that the corrosion-induced damage in concrete reinforcement often does not show up on the surface until significant propagation has occurred. Moreover, prestressed reinforcement can...
Lundi, 30 Mars, 2020 - 17:45
The Federal Highway Administration mandates that all [bridge] structures in its inventory are to be inspected every two years. Consequently, deck surveys are conducted to identify unseen damage within them. A significant number of bridges in Virginia have concrete decks with an overlay. Methods commonly deployed on these decks, are limited in the quantitative...
Lundi, 30 Mars, 2020 - 17:45
To facilitate efficient pavement and bridge management programs, it is important to implement practices that measure and quantify roughness at bridge approaches. It is vital to establish standardized quality indices based on quantitative approaches. Engineers can use these indices to determine the condition of a particular bridge approach and subsequently...
