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- Concrete mix sidewalks (1)
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- Curing method (1)
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Articles 1 - 4 of 4
Full-Text Articles in Civil Engineering
Construction And Materials Best Practices For Concrete Sidewalks: Phase Ii - Long-Term Performance And Hot Weather Placement Effects, Kara Peterman, Sergio Brena, Likhitha Rudraraju, Brian Shea
Construction And Materials Best Practices For Concrete Sidewalks: Phase Ii - Long-Term Performance And Hot Weather Placement Effects, Kara Peterman, Sergio Brena, Likhitha Rudraraju, Brian Shea
Structural Engineering and Mechanics Research Reports
This report summarizes the investigation of construction practices and materials to develop durable concrete sidewalks which can resist scaling damage caused by exposure to freezing environment and deicer application. Over 16 months, a field study accompanied by laboratory testing was conducted to identify factors that affect the performance and durability of sidewalks. The variables considered for the study are concrete mix design, placement and finishing practices, curing methods, and deicer application. The placement of the sidewalks took place in late July 2021, to investigate the impact of hot weather concreting practices on the performance of sidewalks. Forty-eight sidewalk panels were …
Revised Load Rating Procedures For Deteriorated Prestressed Concrete Beams, Alex Stripsky, Sergio F. Brena, Jessica Boakye, Scott A. Civjan, Simos Gerasimidis
Revised Load Rating Procedures For Deteriorated Prestressed Concrete Beams, Alex Stripsky, Sergio F. Brena, Jessica Boakye, Scott A. Civjan, Simos Gerasimidis
Structural Engineering and Mechanics Research Reports
The first prestressed concrete bridge in the United States was built in the early 1950s. Since then, several typical sections have been developed for use in bridge construction including I-beams, deck slabs, box beams, double tees, etc. In bridges under aggressive environments, corrosion deterioration of prestressing strands and stirrups has occurred creating challenges associated with determining the strength of deteriorated existing bridge sections. The MassDOT LRFD Bridge Manual includes provisions to estimate strength of corrosion deteriorated prestressed concrete box beams allowing engineers to calculate the load rating of these types of bridges. The provisions are based on the observed condition …
Ultra-High-Performance Concrete Reinforced With Multi-Scale Hybrid Fibers And Its Durability-Related Properties, Jianqiang Wei, Sergio Brena, Cameron Ritchie, Hitesh Bhaskar More
Ultra-High-Performance Concrete Reinforced With Multi-Scale Hybrid Fibers And Its Durability-Related Properties, Jianqiang Wei, Sergio Brena, Cameron Ritchie, Hitesh Bhaskar More
Structural Engineering and Mechanics Research Reports
Due to its excellent mechanical properties, dense microstructure, low permeability, ease of placement and volume stability, ultra-high performance concrete (UHPC) is considered the next-generation structural concrete and is increasingly used in transportation infrastructure. While previous research efforts generated valuable results, to achieve the desired performance, UHPC needs to be well formulated with precise and optimized quantities of cementitious materials, fillers, fine aggregate, water, chemical admixtures, and fibers. In addition, the mixture design of UHPC and its correlation with the performance evolution under different curing conditions remain unclear, and there exist critical significant gaps in understanding the efficiency of fibers and …
Construction And Materials Best Practice For Concrete Sidewalks, Sergio F. Brena, Kara Peterman, Rhyan Sullivan
Construction And Materials Best Practice For Concrete Sidewalks, Sergio F. Brena, Kara Peterman, Rhyan Sullivan
Structural Engineering and Mechanics Research Reports
This report summarizes an 18-month effort to investigate best practices to incorporate into the materials and construction of concrete sidewalks to mitigate surface scaling damage induced by freeze-thaw cycles in the presence of deicing chemicals. The study involved an in-situ experimental study accompanied by laboratory testing and quantitative analyses to determine key factors that impact sidewalk performance and durability. The primary variables considered in the study were concrete mixture design (aggregate/paste optimization, air content, and cementitious material replacements), workmanship (delivery, placement, finishing, curing), and deicing treatment. The collective effort involved participants from construction companies, a concrete producer, academia, testing laboratories, …